LT6230CS6-10#TRM [Linear]
LT6230 - 215MHz, Rail-to-Rail Output, 1.1nV/rtHz, 3.5mA Op Amp Family; Package: SOT; Pins: 6; Temperature Range: 0°C to 70°C;
| 型号： | LT6230CS6-10#TRM |
| 厂家： | 
Linear |
| 描述： | LT6230 - 215MHz, Rail-to-Rail Output, 1.1nV/rtHz, 3.5mA Op Amp Family; Package: SOT; Pins: 6; Temperature Range: 0°C to 70°C 运算放大器 放大器电路 光电二极管 |
| 文件： | 总24页 (文件大小：649K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT6230/LT6230-10/
LT6231/LT6232
215MHz, Rail-to-Rail Output,
1.1nV/√Hz, 3.5mA Op Amp Family
U
DESCRIPTIO
FEATURES
The LT®6230/LT6231/LT6232 are single/dual/quad low
noise, rail-to-rail output unity gain stable op amps that
feature 1.1nV/√Hz noise voltage and draw only 3.5mA of
supply current per amplifier. These amplifiers combine
very low noise and supply current with a 215MHz gain
bandwidth product, a 70V/µs slew rate and are optimized
for low supply voltage signal conditioning systems. The
LT6230-10 is a single amplifier optimized for higher gain
applications resulting in higher gain bandwidth and slew
rate. The LT6230 and LT6230-10 include an enable pin
that can be used to reduce the supply current to less than
10µA.
■
Low Noise Voltage: 1.1nV/√Hz
■
Low Supply Current: 3.5mA/Amp Max
■
Low Offset Voltage: 350µV Max
■
Gain Bandwidth Product:
LT6230: 215MHz; AV ≥ 1
LT6230-10: 1450MHz; AV ≥ 10
■
Wide Supply Range: 3V to 12.6V
■
Output Swings Rail-to-Rail
■
Common Mode Rejection Ratio 115dB Typ
■
Output Current: 30mA
■
Operating Temperature Range –40°C to 85°C
■
LT6230 Shutdown to 10µA Maximum
■
LT6230/LT6230-10 in SOT-23 Package
The amplifier family has an output that swings within
50mV of either supply rail to maximize the signal dynamic
range in low supply applications and is specified on 3.3V,
5V and ±5V supplies. The en • √ISUPPLY product of 1.9 per
amplifier is among the most noise efficient of any op amp.
■
Dual LT6231 in 8-Pin SO and Tiny DFN Packages
■
LT6232 in 16-Pin SSOP Package
U
APPLICATIO S
■
The LT6230/LT6230-10 is available in the 6-lead SOT-23
package and the LT6231 dual is available in the 8-pin SO
package with standard pinouts. For compact layouts, the
dual is also available in a tiny dual fine pitch leadless
package (DFN). The LT6232 is available in the 16-pin
SSOP package.
Ultrasound Amplifiers
■
Low Noise, Low Power Signal Processing
■
Active Filters
Driving A/D Converters
Rail-to-Rail Buffer Amplifiers
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
■
U
TYPICAL APPLICATIO
Noise Voltage and Unbalanced
Noise Current vs Frequency
Low Noise Low Power Instrumentation Amplifier
+
V
S
6
5
4
3
2
1
0
6
5
4
3
2
1
0
V
T
CM
= ±2.5V
= 25°C
= 0V
+
R4
R6
S
A
+
IN
499Ω
499Ω
V
1/2 LT6231
+
V
–
S
R2
196Ω
+
–
R1
10Ω
LT6202
–
V
OUT
NOISE CURRENT
NOISE VOLTAGE
R3
196Ω
R5
499Ω
R7
499Ω
V
S
–
1/2 LT6231
–
IN
A
= 40
I
E
= 10mA
= 5.8µV
+
V
S
BW = 5.1MHz
= ±1.5V to ±5V
INPUT REFERRED,
N
RMS
–
10
100
1k
10k
100k
V
S
V
S
MEASUREMENT BW = 8MHz
FREQUENCY (Hz)
623012 TA01a
623012 TA01b
sn623012 623012fas
1
LT6230/LT6230-10/
LT6231/LT6232
W W U W
ABSOLUTE AXI U RATI GS (Note 1)
Total Supply Voltage (V+ to V–) ............................ 12.6V Junction Temperature........................................... 150°C
Input Current (Note 2) ........................................ ±40mA Junction Temperature (DD Package) ................... 125°C
Output Short-Circuit Duration (Note 3)............ Indefinite Storage Temperature Range ..................–65°C to 150°C
Operating Temperature Range (Note 4) ...–40°C to 85°C Storage Temperature Range
Specified Temperature Range (Note 5)....–40°C to 85°C (DD Package) ...................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
U
W
U
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
ORDER PART
NUMBER
TOP VIEW
LT6230CS6
LT6231CDD
LT6231IDD
TOP VIEW
+
OUT A
–IN A
+IN A
1
2
3
4
8
7
6
5
V
LT6230IS6
+
OUT 1
–
6 V
OUT B
–IN B
+IN B
–
+
LT6230CS6-10
LT6230IS6-10
5 ENABLE
4 –IN
V
2
–
+
–
+IN 3
V
S6 PACKAGE
S6 PART
DD PART
6-LEAD PLASTIC TSOT-23
DD PACKAGE
MARKING*
MARKING*
8-LEAD (3mm × 3mm) PLASTIC DFN
T
JMAX = 150°C, θJA = 250°C/W
TJMAX = 125°C, θJA = 160°C/W
UNDERSIDE METAL CONNECTED TO V–
(PCB CONNECTION OPTIONAL)
LAEU
LTAFJ
LTAFK
TOP VIEW
ORDER PART
NUMBER
ORDER PART
NUMBER
OUT A
–IN A
+IN A
1
2
3
4
5
6
7
8
16 OUT D
15 –IN D
TOP VIEW
–
+
+–A
LT6232CGN
LT6232IGN
LT6231CS8
LT6231IS8
D
C
+
OUT A
1
2
3
4
8
7
6
5
V
14
13
12
11
10
9
+IN D
+
–
V
V
–IN A
+IN A
OUT B
–IN B
+IN B
–
+
+
+
–
+IN B
–IN B
OUT B
NC
+IN C
–IN C
OUT C
NC
–
+
–B
–
V
GN PART
MARKING
S8 PART
MARKING
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 200°C/W
6232
6232I
6231
6231I
GN PACKAGE
16-LEAD NARROW PLASTIC SSOP
TJMAX = 150°C, θJA = 135°C/W
*The temperature grade is identified by a label on the shipping container.Consult LTC Marketing for parts specified with wider operating temperature ranges.
sn623012 623012fas
2
LT6230/LT6230-10/
LT6231/LT6232
ELECTRICAL CHARACTERISTICS
TA = 25°C, VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half supply,
ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT6230S6, LT6230S6-10
LT6231S8, LT6232GN
LT6231DD
100
50
75
500
350
450
µV
µV
µV
OS
Input Offset Voltage Match
100
600
µV
(Channel-to-Channel) (Note 6)
I
I
Input Bias Current
5
10
0.9
0.6
µA
µA
µA
B
I Match (Channel-to-Channel) (Note 6)
B
0.1
0.1
180
1.1
Input Offset Current
OS
Input Noise Voltage
0.1Hz to 10Hz
nV
P-P
e
Input Noise Voltage Density
Input Noise Current Density, Balanced Source
f = 10kHz, V = 5V
1.7
nV/√Hz
n
S
i
f = 10kHz, V = 5V, R = 10k
1
2.4
pA/√Hz
pA/√Hz
n
S
S
Unbalanced Source f = 10kHz, V = 5V, R = 10k
S
S
Input Resistance
Input Capacitance
Large-Signal Gain
Common Mode
Differential Mode
6.5
7.5
MΩ
kΩ
C
A
Common Mode
Differential Mode
2.9
7.7
pF
pF
IN
V = 5V, V = 0.5V to 4.5V, R = 10k to V /2
105
21
5.4
200
40
9
V/mV
V/mV
V/mV
VOL
S
O
L
S
R = 1k to V /2
L
S
V = 1V to 4V,
O
R = 100Ω to V /2
L
S
V = 3.3V, V = 0.65V to 2.65V, R = 10k to V /2
90
16.5
175
32
V/mV
V/mV
S
O
L
S
R = 1k to V /2
L
S
V
Input Voltage Range
Guaranteed by CMRR, V = 5V, 0V
1.5
1.15
4
2.65
V
V
CM
S
V = 3.3V, 0V
S
CMRR
PSRR
Common Mode Rejection Ratio
V = 5V, V = 1.5V to 4V
90
90
115
115
dB
dB
S
CM
V = 3.3V, V = 1.15V to 2.65V
S
CM
CMRR Match (Channel-to-Channel) (Note 6)
Power Supply Rejection Ratio
V = 5V, V = 1.5V to 4V
84
90
84
3
120
115
115
dB
dB
dB
V
S
CM
V = 3V to 10V
S
PSRR Match (Channel-to-Channel) (Note 6)
Minimum Supply Voltage (Note 7)
V = 3V to 10V
S
V
V
Output Voltage Swing LOW (Note 8)
No Load
4
85
240
185
40
mV
mV
mV
mV
OL
OH
I
= 5mA
190
460
350
SINK
V = 5V, I
= 20mA
= 15mA
SINK
S
SINK
V = 3.3V, I
S
Output Voltage Swing HIGH (Note 8)
Short-Circuit Current
No Load
5
90
325
250
50
mV
mV
mV
mV
I
= 5mA
200
600
400
SOURCE
V = 5V, I
= 20mA
S
SOURCE
V = 3.3V, I
S
= 15mA
SOURCE
I
I
V = 5V
±30
±25
±45
±40
mA
mA
SC
S
V = 3.3V
S
Supply Current per Amplifier
Disabled Supply Current per Amplifier
3.15
0.2
3.5
10
mA
µA
S
+
ENABLE = V – 0.35V
sn623012 623012fas
3
LT6230/LT6230-10/
LT6231/LT6232
ELECTRICAL CHARACTERISTICS
TA = 25°C, VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half supply,
ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
–75
0.3
UNITS
µA
V
I
ENABLE Pin Current
ENABLE Pin Input Voltage LOW
ENABLE Pin Input Voltage HIGH
Output Leakage Current
Turn-On Time
ENABLE = 0.3V
–25
ENABLE
V
V
L
+
V – 0.35V
V
H
+
ENABLE = V – 0.35V, V = 1.5V to 3.5V
0.2
300
41
10
µA
ns
O
t
t
ENABLE = 5V to 0V, R = 1k, V = 5V
L S
ON
Turn-Off Time
ENABLE = 0V to 5V, R = 1k, V = 5V
µs
OFF
L
S
GBW
Gain Bandwidth Product
Frequency = 1MHz, V = 5V
LT6230-10
200
1300
MHz
MHz
S
SR
Slew Rate
V = 5V, A = –1, R = 1k, V = 1.5V to 3.5V
42
60
V/µs
V/µs
S
V
L
O
LT6230-10, V = 5V, A = –10, R = 1k,
250
S
V
L
V = 1.5V to 3.5V
O
FPBW
Full Power Bandwidth
V = 5V, V
= 3V (Note 9)
4.8
6.3
11
55
MHz
MHz
ns
S
OUT
P-P
LT6230-10, HD = HD = ≤ 1%
2
3
t
Settling Time (LT6230, LT6231, LT6232)
0.1%, V = 5V, V
= 2V, A = –1, R = 1k
STEP V L
S
S
The ● denotes the specifications which apply over 0°C < TA < 70°C temperature range. VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half
supply, ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT6230S6, LT6230S6-10
LT6231S8, LT6232GN
LT6231DD
●
●
●
600
450
550
µV
µV
µV
OS
Input Offset Voltage Match
●
800
µV
(Channel-to-Channel) (Note 6)
V
TC
Input Offset Voltage Drift (Note 10)
Input Bias Current
V
= Half Supply
●
●
●
●
0.5
3
11
1
µV/°C
µA
OS
CM
I
I
B
I Match (Channel-to-Channel) (Note 6)
B
µA
Input Offset Current
Large-Signal Gain
0.7
µA
OS
A
V = 5V, V = 0.5V to 4.5V, R = 10k to V /2
●
●
●
78
17
4.1
V/mV
V/mV
V/mV
VOL
S
O
L
S
R = 1k to V /2
L
S
V = 1V to 4V,
O
R = 100Ω to V /2
L
S
V = 3.3V, V = 0.65V to 2.65V, R = 10k to V /2
●
●
66
13
V/mV
V/mV
S
O
L
S
R = 1k to V /2
L
S
V
Input Voltage Range
Guaranteed by CMRR, V = 5V, 0V
●
●
1.5
1.15
4
2.65
V
V
CM
S
V = 3.3V, 0V
S
CMRR
PSRR
Common Mode Rejection Ratio
V = 5V, V = 1.5V to 4V
●
●
90
85
dB
dB
S
CM
V = 3.3V, V = 1.15V to 2.65V
S
CM
CMRR Match (Channel-to-Channel) (Note 6) V = 5V, V = 1.5V to 4V
●
●
●
●
84
85
79
3
dB
dB
dB
V
S
CM
Power Supply Rejection Ratio
V = 3V to 10V
S
PSRR Match (Channel-to-Channel) (Note 6) V = 3V to 10V
S
Minimum Supply Voltage (Note 7)
V
Output Voltage Swing LOW (Note 8)
No Load
= 5mA
●
●
●
●
50
mV
mV
mV
mV
OL
I
200
500
380
SINK
V = 5V, I
= 20mA
S
SINK
= 15mA
SINK
V = 3.3V, I
S
sn623012 623012fas
4
LT6230/LT6230-10/
LT6231/LT6232
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over 0°C < TA < 70°C
temperature range. VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half supply, ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Output Voltage Swing HIGH (Note 8)
No Load
●
●
●
●
60
mV
mV
mV
mV
OH
I
= 5mA
215
650
430
SOURCE
V = 5V, I
= 20mA
S
SOURCE
V = 3.3V, I
S
= 15mA
SOURCE
I
I
I
Short-Circuit Current
V = 5V
V = 3.3V
S
●
●
±25
±20
mA
mA
SC
S
Supply Current per Amplifier
Disabled Supply Current per Amplifier
●
●
4.2
mA
µA
S
+
ENABLE = V – 0.25V
ENABLE = 0.3V
1
ENABLE Pin Current
ENABLE Pin Input Voltage LOW
ENABLE Pin Input Voltage HIGH
Output Leakage Current
Turn-On Time
●
●
●
●
●
●
●
●
–85
0.3
µA
V
ENABLE
V
V
L
+
V – 0.25V
V
H
+
ENABLE = V – 0.25V, V = 1.5V to 3.5V
1
µA
O
t
t
ENABLE = 5V to 0V, R = 1k, V = 5V
300
65
ns
ON
L
S
Turn-Off Time
ENABLE = 0V to 5V, R = 1k, V = 5V
µs
OFF
L
S
SR
Slew Rate
V = 5V, A = –1, R = 1k, V = 1.5V to 3.5V
S
35
V/µs
V/µs
V
L
O
LT6230-10, A = –10, R = 1k,
225
V
L
V = 1.5V to 3.5V
O
FPBW
Full Power Bandwidth (Note 9)
V = 5V, V
LT6230, LT6231, LT6232
= 3V
P-P
●
3.7
MHz
S
OUT
The ● denotes the specifications which apply over –40°C < TA < 85°C temperature range. VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half
supply, ENABLE = 0V, unless otherwise noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT6230S6, LT6230S6-10
LT6231S8, LT6232GN
LT6231DD
●
●
●
700
550
650
µV
µV
µV
OS
Input Offset Voltage Match
●
1000
µV
(Channel-to-Channel) (Note 6)
V
TC
Input Offset Voltage Drift (Note 10)
Input Bias Current
V
= Half Supply
●
●
●
●
0.5
3
µV/°C
µA
OS
CM
I
I
12
1.1
0.8
B
I Match (Channel-to-Channel) (Note 6)
B
µA
Input Offset Current
Large-Signal Gain
µA
OS
A
V = 5V, V = 0.5V to 4.5V, R = 10k to V /2
●
●
●
72
16
3.6
V/mV
V/mV
V/mV
VOL
S
O
L
S
R = 1k to V /2
L
S
V = 1V to 4V,
O
R = 100Ω to V /2
L
S
V = 3.3V, V = 0.65V to 2.65V,R = 10k to V /2
●
●
60
12
V/mV
V/mV
S
O
L
S
R = 1k to V /2
L
S
V
Input Voltage Range
Guaranteed by CMRR, V = 5V, 0V
●
●
1.5
1.15
4
2.65
V
V
CM
S
V = 3.3V, 0V
S
CMRR
PSRR
Common Mode Rejection Ratio
V = 5V, V = 1.5V to 4V
●
●
90
85
dB
dB
S
CM
V = 3.3V, V = 1.15V to 2.65V
S
CM
CMRR Match (Channel-to-Channel) (Note 6)
Power Supply Rejection Ratio
V = 5V, V = 1.5V to 4V
●
●
84
85
dB
dB
S
CM
V = 3V to 10V
S
sn623012 623012fas
5
LT6230/LT6230-10/
LT6231/LT6232
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over –40°C < TA < 85°C
temperature range. VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half supply, ENABLE = 0V, unless otherwise noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
79
3
TYP
MAX
UNITS
dB
PSRR Match (Channel-to-Channel) (Note 6)
Minimum Supply Voltage (Note 7)
Output Voltage Swing LOW (Note 8)
V = 3V to 10V
S
●
●
V
V
V
No Load
●
●
●
●
60
mV
mV
mV
mV
OL
OH
I
= 5mA
210
510
390
SINK
V = 5V, I
= 15mA
= 15mA
S
SINK
V = 3.3V, I
S
SINK
Output Voltage Swing HIGH (Note 6)
Short-Circuit Current
No Load
●
●
●
●
70
mV
mV
mV
mV
I
= 5mA
220
675
440
SOURCE
V = 5V, I
= 20mA
= 15mA
S
SOURCE
V = 3.3V, I
S
SOURCE
I
I
I
V = 5V
●
●
±15
±15
mA
mA
SC
S
V = 3.3V
S
Supply Current per Amplifier
Disabled Supply Current per Amplifier
●
●
4.4
mA
µA
S
+
ENABLE = V – 0.2V
ENABLE = 0.3V
1
ENABLE Pin Current
ENABLE Pin Input Voltage LOW
ENABLE Pin Input Voltage HIGH
Output Leakage Current
Turn-On Time
●
●
●
●
●
●
●
●
–100
0.3
µA
V
ENABLE
V
V
L
+
V – 0.2V
V
H
+
ENABLE = V – 0.2V, V = 1.5V to 3.5V
1
µA
O
t
t
ENABLE = 5V to 0V, R = 1k, V = 5V
300
72
ns
ON
L
S
Turn-Off Time
ENABLE = 0V to 5V, R = 1k, V = 5V
µs
OFF
L
S
SR
Slew Rate
V = 5V, A = –1, R = 1k, V = 1.5V to 3.5V
31
V/µs
V/µs
S
V
L
O
LT6230-10, A = –10, R = 1k,
185
V
L
V = 1.5V to 3.5V
O
FPBW
Full Power Bandwidth (Note 9)
V = 5V, V
LT6230, LT6231, LT6232
= 3V
P-P
●
3.3
MHz
S
OUT
TA = 25°C, VS = ±5V, VCM = VOUT = 0V, ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT6230, LT6230-10
LT6231S8, LT6232GN
LT6231DD
100
50
75
500
350
450
µV
µV
µV
OS
Input Offset Voltage Match
100
600
µV
(Channel-to-Channel) (Note 6)
I
I
Input Bias Current
5
10
0.9
0.6
µA
µA
µA
B
I Match (Channel-to-Channel) (Note 6)
B
0.1
0.1
180
1.1
Input Offset Current
OS
Input Noise Voltage
0.1Hz to 10Hz
f = 10kHz
nV
P-P
e
Input Noise Voltage Density
1.7
nV/√Hz
n
i
Input Noise Current Density, Balanced Source
Unbalanced Source
f = 10kHz, R = 10k
1
2.4
pA/√Hz
pA/√Hz
n
S
f = 10kHz, R = 10k
S
sn623012 623012fas
6
LT6230/LT6230-10/
LT6231/LT6232
ELECTRICAL CHARACTERISTICS
TA = 25°C, VS = ±5V, VCM = VOUT = 0V, ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Resistance
Common Mode
Differential Mode
6.5
7.5
MΩ
kΩ
C
A
Input Capacitance
Large-Signal Gain
Common Mode
Differential Mode
2.4
6.5
pF
pF
IN
V = ±4.5V, R = 10k
140
35
8.5
260
65
16
V/mV
V/mV
V/mV
VOL
O
L
R = 1k
L
V = ±2V, R = 100Ω
O
L
V
Input Voltage Range
Guaranteed by CMRR
–3
95
89
90
84
4
V
dB
dB
dB
dB
CM
CMRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 6)
Power Supply Rejection Ratio
V
V
= –3V to 4V
= –3V to 4V
120
125
115
115
CM
CM
PSRR
V = ±1.5V to ±5V
S
PSRR Match (Channel-to-Channel) (Note 6)
Output Voltage Swing LOW (Note 8)
V = ±1.5V to ±5V
S
V
V
No Load
4
85
240
40
190
460
mV
mV
mV
OL
OH
I
I
= 5mA
= 20mA
SINK
SINK
Output Voltage Swing HIGH (Note 8)
No Load
5
90
325
50
200
600
mV
mV
mV
I
I
= 5mA
= 20mA
SOURCE
SOURCE
I
I
Short-Circuit Current
±30
mA
SC
Supply Current per Amplifier
Disabled Supply Current per Amplifier
3.3
0.2
3.9
mA
µA
S
ENABLE = 4.65V
ENABLE = 0.3V
I
ENABLE Pin Current
–35
–85
0.3
µA
V
ENABLE
V
V
ENABLE Pin Input Voltage LOW
ENABLE Pin Input Voltage HIGH
Output Leakage Current
Turn-On Time
L
4.65
V
H
+
ENABLE = V – 4.65V, V = ±1V
0.2
300
62
10
µA
ns
µs
O
t
t
ENABLE = 5V to 0V, R = 1k
L
ON
Turn-Off Time
ENABLE = 0V to 5V, R = 1k
OFF
L
GBW
Gain Bandwidth Product
Frequency = 1MHz
LT6230-10
150
1000
215
1450
MHz
MHz
SR
Slew Rate
A = –1, R = 1k, V = –2V to 2V
50
70
320
7.4
11
V/µs
V/µs
MHz
MHz
ns
V
L
O
LT6230-10, A = –10, R = 1k, V = –2V to 2V
V
L
O
FPBW
Full Power Bandwidth
V
= 3V (Note 9)
5.3
OUT
P-P
LT6230-10, HD2 = HD3 ≤ 1%
0.1%, V = 2V, A = –1, R = 1k
t
Settling Time (LT6230, LT6231, LT6232)
50
S
STEP
V
L
sn623012 623012fas
7
LT6230/LT6230-10/
LT6231/LT6232
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over 0°C < TA < 70°C
temperature range. VS = ±5V, VCM = VOUT = 0V, ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT6230S6, LT6230S6-10
LT6231S8, LT6232GN
LT6231DD
●
●
●
600
450
550
µV
µV
µV
OS
Input Offset Voltage Match
●
800
µV
(Channel-to-Channel) (Note 6)
V
TC
Input Offset Voltage Drift (Note 10)
Input Bias Current
●
●
●
●
0.5
3
11
1
µV/°C
µA
OS
I
I
B
I Match (Channel-to-Channel) (Note 6)
B
µA
Input Offset Current
Large-Signal Gain
0.7
µA
OS
A
V = ±4.5V, R = 10k
●
●
●
100
27
6
V/mV
V/mV
V/mV
VOL
O
L
R = 1k
L
V = ±2V, R = 100Ω
O
L
V
Input Voltage Range
Guaranteed by CMRR
●
●
●
●
●
–3
95
89
85
79
4
V
dB
dB
dB
dB
CM
CMRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 6)
Power Supply Rejection Ratio
V
V
= –3V to 4V
= –3V to 4V
CM
CM
PSRR
V = ±1.5V to ±5V
S
PSRR Match (Channel-to-Channel) (Note 6)
Output Voltage Swing LOW (Note 8)
V = ±1.5V to ±5V
S
V
V
No Load
●
●
●
50
200
500
mV
mV
mV
OL
OH
I
I
= 5mA
= 20mA
SINK
SINK
Output Voltage Swing HIGH (Note 8)
Short-Circuit Current
No Load
●
●
●
60
215
650
mV
mV
mV
I
I
= 5mA
= 20mA
SOURCE
SOURCE
I
I
●
±25
mA
SC
Supply Current per Amplifier
Disabled Supply Current per Amplifier
●
●
4.6
mA
µA
S
ENABLE = 4.75V
ENABLE = 0.3V
1
I
ENABLE Pin Current
ENABLE Pin Input Voltage LOW
ENABLE Pin Input Voltage HIGH
Output Leakage Current
Turn-On Time
●
●
●
●
●
●
●
●
●
–95
0.3
µA
V
ENABLE
V
V
L
4.75
V
H
ENABLE = 4.75V, V = ±1V
1
µA
O
t
t
ENABLE = 5V to 0V, R = 1k
300
85
ns
ON
L
Turn-Off Time
ENABLE = 0V to 5V, R = 1k
µs
OFF
L
SR
Slew Rate
A = –1, R = 1k, V = –2V to 2V
44
V/µs
V/µs
MHz
V
L
O
LT6230-10, A = –10, R = 1k, V = –2V to 2V
315
V
L
O
FPBW
Full Power Bandwidth
V
= 3V (Note 9)
4.66
OUT
P-P
LT6230, LT6231, LT6232
sn623012 623012fas
8
LT6230/LT6230-10/
LT6231/LT6232
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over –40°C < TA < 85°C
temperature range. VS = ±5V, VCM = VOUT = 0V, ENABLE = 0V, unless otherwise noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT6230, LT6230-10
LT6231S8, LT6232GN
LT6231DD
●
●
●
700
550
650
µV
µV
µV
OS
Input Offset Voltage Match
●
1000
µV
(Channel-to-Channel) (Note 6)
V
TC
Input Offset Voltage Drift (Note 10)
Input Bias Current
●
●
●
●
0.5
3
µV/°C
µA
OS
I
I
12
1.1
0.8
B
I Match (Channel-to-Channel) (Note 6)
B
µA
Input Offset Current
Large-Signal Gain
µA
OS
A
V = ±4.5V, R = 10k
●
●
●
93
25
4.8
V/mV
V/mV
V/mV
VOL
O
L
R = 1k
L
V = ±1.5V, R = 100Ω
O
L
V
Input Voltage Range
Guaranteed by CMRR
●
●
●
●
●
–3
95
89
85
79
4
V
dB
dB
dB
dB
CM
CMRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 6)
Power Supply Rejection Ratio
V
V
= –3V to 4V
= –3V to 4V
CM
CM
PSRR
V = ±1.5V to ±5V
S
PSRR Match (Channel-to-Channel) (Note 6)
Output Voltage Swing LOW (Note 8)
V = ±1.5V to ±5V
S
V
V
No Load
●
●
●
60
210
510
mV
mV
mV
OL
OH
I
I
= 5mA
= 15mA
SINK
SINK
Output Voltage Swing HIGH (Note 8)
Short-Circuit Current
No Load
●
●
●
70
220
675
mV
mV
mV
I
I
= 5mA
= 20mA
SOURCE
SOURCE
I
I
●
±15
mA
SC
Supply Current per Amplifier
Disabled Supply Current per Amplifier
●
●
4.85
mA
µA
S
ENABLE = 4.8V
ENABLE = 0.3V
1
I
ENABLE Pin Current
ENABLE Pin Input Voltage LOW
ENABLE Pin Input Voltage HIGH
Output Leakage Current
Turn-On Time
●
●
●
●
●
●
●
●
●
–110
0.3
µA
V
ENABLE
V
V
L
4.8
V
H
ENABLE = 4.8V, V = ±1V
1
µA
O
t
t
ENABLE = 5V to 0V, R = 1k
300
72
ns
ON
L
Turn-Off Time
ENABLE = 0V to 5V, R = 1k
µs
OFF
L
SR
Slew Rate
A = –1, R = 1k, V = –2V to 2V
37
V/µs
V/µs
MHz
V
L
O
LT6230-10, A = –10, R = 1k, V = –2V to 2V
260
V
L
O
FPBW
Full Power Bandwidth (Note 9)
V
= 3V
3.9
OUT
P-P
LT6230, LT6231, LT6232
sn623012 623012fas
9
LT6230/LT6230-10/
LT6231/LT6232
ELECTRICAL CHARACTERISTICS
Note 1: Absolute maximum ratings are those values beyond which the life
The LT6230I/LT6231I/LT6232I are guaranteed to meet specified
of the device may be impaired.
performance from –40°C to 85°C.
Note 2: Inputs are protected by back-to-back diodes. If the differential
input voltage exceeds 0.7V, the input current must be limited to less than
40mA.
Note 3: A heat sink may be required to keep the junction temperature
below the absolute maximum rating when the output is shorted
indefinitely.
Note 6: Matching parameters are the difference between the two amplifiers
A and D and between B and C of the LT6232; between the two amplifiers
of the LT6231. CMRR and PSRR match are defined as follows: CMRR and
PSRR are measured in µV/V on the matched amplifiers. The difference is
calculated between the matching sides in µV/V. The result is converted
to dB.
Note 7: Minimum supply voltage is guaranteed by power supply rejection
ratio test.
Note 8: Output voltage swings are measured between the output and
Note 4: The LT6230C/LT6230I the LT6231C/LT6231I, and LT6232C/
LT6232I are guaranteed functional over the temperature range of –40°C
and 85°C.
power supply rails.
Note 9: Full-power bandwidth is calculated from the slew rate:
FPBW = SR/2πV
Note 10: This parameter is not 100% tested.
Note 5: The LT6230C/LT6231C/LT6232C are guaranteed to meet specified
performance from 0°C to 70°C. The LT6230C/LT6231C/LT6232C are
designed, characterized and expected to meet specified performance from
– 40°C to 85°C, but are not tested or QA sampled at these temperatures.
P
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6230/LT6231/LT6232)
Supply Current vs Supply Voltage
(Per Amplifier)
Offset Voltage vs Input Common
Mode Voltage
VOS Distribution
6
5
4
3
2
1
0
2.0
1.5
100
90
80
70
60
50
40
30
20
10
0
V
V
= 5V, 0V
CM
V = 5V, 0V
S
S
+
= V /2
S8
1.0
T
= 125°C
= 25°C
A
0.5
0
T
A
–0.5
–1.0
–1.5
–2.0
T
= –55°C
A
T = –55°C
A
T
= 25°C
A
T
= 125°C
A
50 100
2
4
8
10
12
14
0.5
1 2
2.5
3 3.5 4 4.5 5
–200 –150 –100 –50
0
150 200
0
6
0
1.5
INPUT OFFSET VOLTAGE (µV)
TOTAL SUPPLY VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
623012 GO1
623012 GO2
623012 GO3
Input Bias Current vs
Common Mode Voltage
Output Saturation Voltage vs
Load Current (Output Low)
Input Bias Current vs Temperature
10
1
14
12
10
8
10
9
V
= 5V, 0V
V
= 5V, 0V
V = 5V, 0V
S
S
S
8
T
= –55°C
A
V
= 4V
CM
7
T
= 125°C
0.1
A
6
T
= 125°C
A
6
V
= 1.5V
T
= –55°C
CM
A
4
T
= 25°C
A
5
0.01
0.001
2
T
= 25°C
A
4
0
–2
3
0.01
0.1
1
10
100
0
1
3
4
5
6
–25
0
50
75 100 125
–1
2
–50
25
LOAD CURRENT (mA)
COMMON MODE VOLTAGE (V)
TEMPERATURE (°C)
623012 GO6
623012 GO4
623012 GO5
sn623012 623012fas
10
LT6230/LT6230-10/
LT6231/LT6232
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6230/LT6231/LT6232)
Output Saturation Voltage vs
Load Current (Output High)
Output Short Circuit Current vs
Power Supply Voltage
Minimum Supply Voltage
10
1
1.0
0.8
70
60
50
40
V
= 5V, 0V
V
= V /2
S
CM S
SINKING
T
= 125°C
A
0.6
T
= 25°C
A
30
0.4
20
10
T
= –55°C
A
0.2
T
= 125°C
A
0.1
0
0
T
= –55°C
A
–10
–20
–30
–40
–50
–60
–70
SOURCING
–0.2
–0.4
–0.6
–0.8
–1.0
T
= 125°C
A
T
= –55°C
A
T
= –55°C
A
T
= 25°C
A
T
= 125°C
0.01
0.001
A
T
= 25°C
A
T
= 25°C
A
0.01
0.1
1
10
100
0
0.5
1
1.5
2
2.5
3
3.5 4 4.5 5
2
2.5
3.5
4
4.5
5
1.5
3
LOAD CURRENT (mA)
TOTAL SUPPLY VOLTAGE (V)
POWER SUPPLY VOLTAGE (±V)
623012 G07
623012 G08
623012 GO9
Open Loop Gain
Open Loop Gain
Open Loop Gain
2.5
2.0
2.5
2.0
2.5
2.0
V
T
= 3V, 0V
= 25°C
V
T
= 5V, 0V
= 25°C
V
A
= ±5V
S
S
A
S
A
T
= 25°C
1.5
1.5
1.5
1.0
1.0
1.0
0.5
0.5
0.5
R
L
= 1k
R
= 1k
R
L
= 1k
L
0
0
0
R
= 100Ω
R
= 100Ω
L
–0.5
–1.0
–1.5
–2.0
–2.5
–0.5
–1.0
–1.5
–2.0
–2.5
–0.5
–1.0
–1.5
–2.0
–2.5
R = 100Ω
L
L
0.5
1
2
2.5
3
3.5
4
4.5
5
–4 –3
–1
0
1
2
3
4
5
0
0.5
1
1.5
2
2.5
3
0
1.5
–5
–2
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
623012 G10
623012 G11
623012 G12
Total Noise vs Total Source
Resistance
Offset Voltage vs Output Current
Warm-Up Drift vs Time
100
10
1
2.0
1.5
30
28
26
24
22
20
18
16
14
12
10
V
= ±5V
V
V
= ±2.5V
CM
T
= 25°C
S
S
A
= 0V
f = 100kHz
UNBALANCED
SOURCE
TOTAL NOISE
T
= –55°C
A
V
= ±5V
S
1.0
RESISTORS
0.5
V
= ±2.5V
= ±1.5V
S
RESISTOR NOISE
0
T
= 25°C
A
V
S
–0.5
–1.0
–1.5
–2.0
T = 125°C
A
AMPLIFIER NOISE VOLTAGE
0.1
–60 –45 –30 –15
0
15 30 45 60 75
–75
20
80 100 120 140 160
40 60
TIME AFTER POWER-UP (s)
0
10
100
1k
10k
100k
OUTPUT CURRENT (mA)
SOURCE RESISTANCE (Ω)
623012 G15
623012 G13
623012 G14
sn623012 623012fas
11
LT6230/LT6230-10/
LT6231/LT6232
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6230/LT6231/LT6232)
0.1Hz to 10Hz Output Voltage
Noise
Noise Voltage and Unbalanced
Noise Current vs Frequency
Gain Bandwidth and Phase Margin
vs Temperature
6
5
4
3
2
1
0
6
5
4
3
2
1
0
70
60
50
40
V
T
= ±2.5V
V
= ±2.5V
C
= 5pF
= 1k
S
A
S
L
L
PHASE MARGIN
= 25°C
R
V
V
= 0V
V = ±5V
S
= V /2
CM
CM
S
V
= 3V, 0V
S
100nV
240
220
200
180
160
140
V
= ±5V
S
NOISE CURRENT
NOISE VOLTAGE
–100nV
V
= 3V, 0V
S
GAIN BANDWIDTH
10
100
1k
10k
100k
–25
35
65
95
125
5s/DIV
–55
5
FREQUENCY (Hz)
TEMPERATURE (°C)
623012 G16
623012 G17
623012 G18
Gain Bandwidth and Phase Margin
vs Supply Voltage
Open Loop Gain vs Frequency
Slew Rate vs Temperature
80
70
60
50
40
30
20
10
0
120
120
110
100
90
70
60
50
40
C
R
V
= 5pF
T
= 25°C
= 5pF
= 1k
A = –1
V
L
L
A
L
L
= 1k
C
R = R = 1k
F G
100
80
= V /2
R
CM
S
PHASE
PHASE MARGIN
V
= ±5V FALLING
60
S
V
= ±5V
S
240
220
200
180
160
140
V
= 3V, 0V
V
= ±5V RISING
40
S
80
S
20
70
0
60
V
= ±5V
GAIN BANDWIDTH
V = ±2.5V FALLING
S
S
–20
–40
–60
–80
50
GAIN
V
= ±2.5V RISING
S
40
V
= 3V, 0V
S
–10
–20
30
20
100k
1M
10M
FREQUENCY (Hz)
100M
1G
2
4
8
10
12
14
–35 –15
25 45 65 85 105 125
TEMPERATURE (°C)
0
6
–55
5
TOTAL SUPPLY VOLTAGE (V)
623012 G19
623012 G20
623012 G21
Common Mode Rejection Ratio vs
Frequency
Channel Separation vs Frequency
Output Impedance vs Frequency
1k
100
10
120
100
80
60
40
20
0
–40
V
= 5V, 0V
A
= 1
= 25°C
= ±5V
S
V
A
–50
–60
T
V
S
–70
–80
A
= 10
V
–90
–100
–110
–120
–130
–140
1
A
= 2
V
A
= 1
V
0.1
0.01
V
V
= 5V, 0V
S
= V /2
CM
S
10k
100k
1M
10M
100M
1G
100k
1M
10M
100M
100k
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
623012 G24
623012 G23
623012 G22
sn623012 623012fas
12
LT6230/LT6230-10/
LT6231/LT6232
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6230/LT6231/LT6232)
Power Supply Rejection Ratio vs
Frequency
Series Output Resistance and
Overshoot vs Capacitive Load
Series Output Resistance and
Overshoot vs Capacitive Load
120
100
80
60
40
20
0
50
45
40
35
30
25
20
15
10
5
50
V
T
= 5V, 0V
= 25°C
= V /2
V
A
= 5V, 0V
= 1
V
A
= 5V, 0V
= 2
S
A
CM
S
V
S
V
45
40
35
30
25
20
15
10
5
V
R
= 10Ω
S
S
R
= 10Ω
S
POSITIVE SUPPLY
R
= 20Ω
S
R
= 20Ω
S
NEGATIVE SUPPLY
R
R
= 50Ω
= 50Ω
S
L
R
R
= 50Ω
= 50Ω
S
L
0
0
1k
10k
100k
1M
10M
100M
10
100
1000
10
100
CAPACITIVE LOAD (pF)
1000
CAPACITIVE LOAD (pF)
FREQUENCY (Hz)
623012 G25
623012 G26
623012 G27
Settling Time vs Output Step
(Non-Inverting)
Settling Time vs Output Step
(Inverting)
Maximum Undistorted Output
Signal vs Frequency
10
9
200
150
100
50
200
150
100
50
V
= ±5V
= 25°C
= 1
V
= ±5V
= 25°C
= –1
S
A
S
A
500Ω
T
T
A
= –1
V
A
A
V
V
500Ω
A
= 2
8
–
+
V
–
+
V
IN
V
V
OUT
OUT
7
500Ω
V
IN
6
5
1mV
1mV
1mV
1mV
1
4
V
= ±5V
S
A
10mV
10mV
3
10mV
10mV
2
3
T
= 25°C
HD , HD < –40dBc
2
3
2
0
0
10k
100k
1M
10M
–3 –2 –1
2
4
–3 –2 –1
1
3
4
–4
0
–4
0
FREQUENCY (Hz)
OUTPUT STEP (V)
OUTPUT STEP (V)
623012 G30
623012 G28
623012 G29
Distortion vs Frequency
Distortion vs Frequency
Distortion vs Frequency
–40
–50
–60
–70
–80
–90
–100
–40
–50
–60
–70
–80
–90
–100
–40
–50
–60
–70
–80
–90
–100
V
A
V
= ±5V
= 1
OUT
V
A
V
= ±2.5V
= 2
V
A
V
= ±2.5V
= 1
S
V
S
V
S
V
R
= 100Ω, 3RD
L
= 2V
= 2V
= 2V
(P–P)
(P–P)
(P–P)
OUT
OUT
R
= 100Ω, 3RD
L
R
= 100Ω, 3RD
L
R
= 100Ω, 2ND
L
R
= 100Ω, 2ND
R
= 100Ω, 2ND
L
L
R
= 1k, 2ND
L
R
= 1k, 2ND
L
R
= 1k, 2ND
L
R
= 1k, 3RD
R
= 1k, 3RD
L
L
R
= 1k, 3RD
100k
L
10k
100k
1M
10M
10k
1M
10M
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
623012 G32
623012 G33
623012 G31
sn623012 623012fas
13
LT6230/LT6230-10/
LT6231/LT6232
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6230/LT6231/LT6232)
Large Signal Response
Small Signal Response
Distortion vs Frequency
–40
–50
–60
–70
–80
–90
–100
V
A
V
= ±5V
= 2
OUT
S
V
R
= 100Ω, 3RD
L
= 2V
(P–P)
2V
0V
R
= 100Ω, 2ND
L
0V
R
L
= 1k, 3RD
–2V
VS = ±2.5V
V = –1
RL = 1k
200ns/DIV
VS = ±2.5V
AV = 1
RL = 1k
200ns/DIV
A
R
= 1k, 2ND
L
623345 G35
623345 G36
10k
100k
1M
10M
FREQUENCY (Hz)
623012 G34
Large Signal Response
Output Overdrive Recovery
5V
0V
0V
0V
–5V
VS = ±5V
200ns/DIV
VS = ±2.5V
AV = 3
200ns/DIV
AV = 1
R
L = 1k
623345 G37
623345 G38
(LT6230) ENABLE Characteristics
Supply Current vs ENABLE Pin
Voltage
ENABLE Pin Current vs ENABLE
Pin Voltage
ENABLE Pin Response Time
4.5
30
25
20
15
10
5
V
A
= ±2.5V
S
V
T
= –55°C
A
= 1
4.0
T
= 125°C
A
5V
0V
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
T
= 25°C
A
T
T
= 25°C
A
T
= –55°C
A
= 125°C
A
0.5V
0V
VS = ±2.5V
VIN = 0.5V
AV = 1
100µs/DIV
V
= ±2.5V
S
0
–2.0
0
1.0
2.0
–1.0
–2.0
0
1.0
2.0
–1.0
R
L = 1k
623345 G41
PIN VOLTAGE (V)
PIN VOLTAGE (V)
623012 G39
623012 G40
sn623012 623012fas
14
LT6230/LT6230-10/
LT6231/LT6232
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6230-10)
Gain Bandwidth and Phase Margin
vs Temperature
Series Output Resistor and
Overshoot vs Capacitive Load
Slew Rate vs Temperature
600
550
500
450
400
350
300
250
200
150
100
70
1700
1500
1300
1100
900
A
= 10
A = –10
V
V
A
= 5V, 0V
= 10
V
S
V
R = 1k
V
= ±5V
F
G
S
60
50
40
30
20
10
0
R
= 100Ω
R
= 10Ω
S
V
= ±5V FALLING
GAIN BANDWIDTH
S
V
= 3V, 0V
S
R
= 20Ω
V
= ±5V RISING
S
S
80
70
60
50
40
R
= 50Ω
S
PHASE MARGIN
V
= ±2.5V RISING
S
V
= ±5V
S
V
= ±2.5V FALLING
V
= 3V, 0V
S
S
10
100
1000
10000
–25
0
50
75 100 125
–35 –15
25 45 65 85 105 125
TEMPERATURE (°C)
–50
25
–55
5
CAPACITIVE LOAD (pF)
TEMPERATURE (°C)
623012 G44
623012 G42
623012 G43
Open Loop Gain and Phase vs
Frequency
Gain Bandwidth and Phase Margin
vs Supply Voltage
Gain Bandwidth vs Resistor Load
90
80
70
60
50
40
30
20
10
0
120
1600
1400
1200
1000
800
600
400
200
0
1700
1450
1200
950
V = ±5V
T
= 25°C
= 10
= 5pF
= 1k
S
A
V
L
PHASE
T
= 25°C
A
C
100
80
A
R = 1k
F
G
V
= ±5V
R
= 100
R
S
L
V
= 3V, 0V
S
60
GAIN BANDWIDTH
PHASE MARGIN
GAIN
40
20
V
= 3V, 0V
S
0
100
50
0
–20
–40
–60
–80
A
C
= 10
= 5pF
= 1k
V
= ±5V
V
L
L
S
R
V
= V /2
CM
S
–10
100k
1M
10M
FREQUENCY (Hz)
100M
1G
0
200
400
600
800
1000
2
4
8
10
12
0
6
TOTAL RESISTOR LOAD (Ω)
TOTAL SUPPLY VOLTAGE (V)
(INCLUDES FEEDBACK R)
623012 G45
623012 G47
623012 G46
Common Mode Rejection Ratio vs
Frequency
Maximum Undistorted Output
Signal vs Frequency
2nd and 3rd Harmonic Distortion vs
Frequency
–40
–50
–60
–70
–80
–90
–100
120
100
80
60
40
20
0
10
9
8
7
6
5
4
3
2
1
0
V
A
V
= ±2.5V
= 10
S
V
V
V
= 5V, 0V
= V /2
S
CM
S
= 2V
(P–P)
OUT
R
= 100Ω, 2ND
L
R
= 100Ω, 3RD
L
R
= 1k, 3RD
= 1k, 2ND
L
R
L
V
= ±5V
= 25°C
= 10
S
A
V
T
A
HD = HD ≤ 40dBc
2
3
10k
100k
1M
10M
10k
100k
1M
10M
100M
1G
10k
100k
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
623012 G50
623012 G49
623012 G48
sn623012 623012fas
15
LT6230/LT6230-10/
LT6231/LT6232
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(LT6230-10)
2nd and 3rd Harmonic Distortion vs
Frequency
Large Signal Response
Output-Overload Recovery
–40
–50
–60
–70
–80
–90
–100
V
A
V
= ±5V
= 10
OUT
S
V
= 2V
(P–P)
R
= 100Ω, 2ND
L
R
= 100Ω, 3RD
L
0V
0V
0V
R
= 1k, 3RD
L
R
= 1k, 2ND
L
VS = ±5V
V = 10
100ns/DIV
VS = 5V, 0V
V = 10
RF = 900Ω, RG = 100Ω
100ns/DIV
A
A
RF = 900Ω, RG = 100Ω
623345 G52
623345 G53
10k
100k
1M
10M
FREQUENCY (Hz)
623012 G51
Input Referred High Frequency
Noise Spectrum
Small Signal Response
10
2.5V
0
VS = 5V, 0V
AV = 10
100ns/DIV
100kHz
50MHz
5MHz/DIV
RF = 900Ω, RG = 100Ω
623345 G54
623345 G55
sn623012 623012fas
16
LT6230/LT6230-10/
LT6231/LT6232
U
W
U U
APPLICATIO S I FOR ATIO
Amplifier Characteristics
2.5V
0V
Figure 1 is a simplified schematic of the LT6230/LT6231/
LT6232, whichhasapairoflownoiseinputtransistorsQ1
and Q2. A simple current mirror Q3/Q4 converts the
differential signal to a single-ended output, and these
transistorsaredegeneratedtoreducetheircontributionto
the overall noise.
–2.5V
500µs/DIV
Capacitor C1 reduces the unity cross frequency and
improves the frequency stability without degrading the
gain bandwidth of the amplifier. Capacitor CM sets the
overall amplifier gain bandwidth. The differential drive
generator supplies current to transistors Q5 and Q6 that
swing the output from rail-to-rail.
623012 F02
Figure 2. VS = ±2.5V, AV = 1 with Large Overdrive
handle transient currents due to amplifier slew rate over-
drive and clipping without protection resistors.
The photo of Figure 2 shows the output response to an
input overdrive with the amplifier connected as a voltage
follower. With the input signal low, current source I1
saturates and the differential drive generator drives Q6
into saturation so the output voltage swings all the way to
V–. The input can swing positive until transistor Q2 satu-
rates into current mirror Q3/Q4. When saturation occurs,
the output tries to phase invert, but diode D2 conducts
current from the signal source to the output through the
feedback connection. The output is clamped a diode drop
below the input. In this photo, the input signal generator
is limiting at about 20mA.
+V
+V
Q5
C
M
Q3
Q4
DESD5
V
OUT
–V
+V
C1
DESD2
DESD6
DIFFERENTIAL
DRIVE GENERATOR
DESD1
–V
D2
–V
+V
–V
Q1
Q2
IN
Q6
D1
+V
+V
IN
BIAS
ENABLE
I
1
DESD3
DESD4
–V
–V
623012 F01
Figure 1. Simplified Schematic
With the amplifier connected in a gain of AV ≥ 2, the output
can invert with very heavy overdrive. To avoid this inver-
sion, limit the input overdrive to 0.5V beyond the power
supply rails.
Input Protection
Thereareback-to-backdiodes,D1andD2acrossthe+and
– inputs of these amplifiers to limit the differential input
voltage to ±0.7V. The inputs of the LT6230/LT6231/
LT6232 do not have internal resistors in series with the
input transistors. This technique is often used to protect
the input devices from over voltage that causes excessive
current to flow. The addition of these resistors would
significantly degrade the low noise voltage of these ampli-
fiers. For instance, a 100Ω resistor in series with each
input would generate 1.8nV/√Hz of noise, and the total
amplifier noise voltage would rise from 1.1nV/√Hz to
2.1nV/√Hz. Once the input differential voltage exceeds
±0.7V, steadystatecurrentconductedthroughtheprotec-
tion diodes should be limited to ±40mA. This implies 25Ω
of protection resistance is necessary per volt of overdrive
beyond ±0.7V. These input diodes are rugged enough to
ESD
The LT6230/LT6231/LT6232 have reverse-biased ESD
protection diodes on all inputs and outputs as shown in
Figure 1. If these pins are forced beyond either supply,
unlimited current will flow through these diodes. If the
current is transient and limited to one hundred milliamps
or less, no damage to the device will occur.
Noise
ThenoisevoltageoftheLT6230/LT6231/LT6232isequiva-
lent to that of a 75Ω resistor, and for the lowest possible
noise it is desirable to keep the source and feedback
resistance at or below this value, i.e. RS + RG||RFB ≤ 75Ω.
sn623012 623012fas
17
LT6230/LT6230-10/
LT6231/LT6232
U
W
U U
APPLICATIO S I FOR ATIO
With RS + RG||RFB = 75Ω the total noise of the amplifier is:
eN=√(1.1nV)2+(1.1nV)2 = 1.55nV/√Hz
For a complete discussion of amplifier noise, see the
LT1028 data sheet.
Below this resistance value, the amplifier dominates the
noise, but in the region between 75Ω and about 3k, the
noise is dominated by the resistor thermal noise. As the
total resistance is further increased beyond 3k, the ampli-
fier noise current multiplied by the total resistance even-
tually dominates the noise.
Enable Pin
The LT6230 includes an ENABLE pin that shuts down the
amplifier to 10µA maximum supply current. The ENABLE
pin must be driven high to within 0.35V of V+ to shut down
the supply current. This can be accomplished with simple
gate logic; however care must be taken if the logic and the
LT6230 operate from different supplies. If this is the case,
then open drain logic can be used with a pull-up resistor
to ensure that the amplifier remains off. See Typical
Characteristic Curves.
TheproductofeN •√ISUPPLY isaninterestingwaytogauge
low noise amplifiers. Most low noise amplifiers with low
eN have high ISUPPLY current. In applications that require
low noise voltage with the lowest possible supply current,
this product can prove to be enlightening. The LT6230/
LT6231/LT6232 have an eN • √ISUPPLY product of only 1.9
per amplifier, yet it is common to see amplifiers with
similar noise specifications to have eN • √ISUPPLY as high
as 13.5.
The output leakage current when disabled is very low;
however, current can flow into the input protection diodes
D1 and D2 if the output voltage exceeds the input voltage
by a diode drop.
sn623012 623012fas
18
LT6230/LT6230-10/
LT6231/LT6232
U
W
U U
APPLICATIO S I FOR ATIO
Single Supply, Low Noise, Low Power, Bandpass Filter with Gain = 10
Frequency Response Plot of
Bandpass Filter
23
C2
47pF
R1
732Ω
1
f
=
= 1MHz
0
+
2πRC
V
C = √C C , R = R1 = R2
1
2
C1
1000pF
732Ω
0.1µF
R3
R2
f
f
=
MHz, MAXIMUM f = 1MHz
0
3
0
(
)
R
10k
732Ω
f
0
=
V
IN
–
+
–3dB
2.5
LT6230
EN
V
OUT
A
E
= 20dB at f
V
0
= 4µV
INPUT REFERRED
+
N
RMS
I
S
= 3.7mA FOR V = 5V
R4
10k
C3
0.1µF
–7
100k
1M
10M
623012 F03
FREQUENCY (Hz)
623012 F04
Low Noise, Low Power, Single Supply, Instrumentation
Amplifier with Gain = 100
R1
30.9Ω
R2
511Ω
+
C2
2200pF
V
C8
68pF
–
U1
LT6230-10
+
R15
88.7Ω
R10
511Ω
V
V
+
IN1
EN
C1
1µF
R13
2k
–
+
R6
511Ω
U3
V
OUT
LT6230
EN
R3
30.9Ω
R4
511Ω
R16
88.7Ω
C9
68pF
R12
511Ω
+
V
R14
2k
C4
10µF
R5
511Ω
–
V
= 100 (V – V )
IN1
R1 = R3
U2
OUT
IN2
R2 = R4
LT6230-10
R2
R1
R10
GAIN =
+ 1
R10 = R12
R15 = R16
(
) (R15)
V
+
IN2
EN
INPUT RESISTANCE = R5 = R6
= 310Hz TO 11MHz
C3
1µF
f
–3dB
E
N
= 20µV
INPUT REFERRED
RMS
I
S
= 10.5mA FOR V = 5V, 0V
S
623012 F05
sn623012 623012fas
19
LT6230/LT6230-10/
LT6231/LT6232
U
PACKAGE DESCRIPTIO
S6 Package
6-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1636)
2.90 BSC
(NOTE 4)
0.62
MAX
0.95
REF
1.22 REF
1.4 MIN
1.50 – 1.75
2.80 BSC
3.85 MAX 2.62 REF
(NOTE 4)
PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.45
6 PLCS (NOTE 3)
0.95 BSC
0.80 – 0.90
0.20 BSC
DATUM ‘A’
0.01 – 0.10
1.00 MAX
0.30 – 0.50 REF
1.90 BSC
0.09 – 0.20
(NOTE 3)
S6 TSOT-23 0302
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
sn623012 623012fas
20
LT6230/LT6230-10/
LT6231/LT6232
U
PACKAGE DESCRIPTIO
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698)
0.675 ±0.05
3.5 ±0.05
2.15 ±0.05 (2 SIDES)
1.65 ±0.05
PACKAGE
OUTLINE
0.25 ± 0.05
0.50
BSC
2.38 ±0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
R = 0.115
0.38 ± 0.10
TYP
5
8
3.00 ±0.10
(4 SIDES)
1.65 ± 0.10
(2 SIDES)
PIN 1
TOP MARK
(NOTE 6)
(DD8) DFN 1203
4
1
0.25 ± 0.05
0.75 ±0.05
0.200 REF
0.50 BSC
2.38 ±0.10
(2 SIDES)
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON TOP AND BOTTOM OF PACKAGE
sn623012 623012fas
21
LT6230/LT6230-10/
LT6231/LT6232
U
PACKAGE DESCRIPTIO
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
.045 ±.005
NOTE 3
.050 BSC
7
5
8
6
.245
MIN
.160 ±.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.030 ±.005
TYP
1
3
4
2
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
(0.254 – 0.508)
× 45°
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
.008 – .010
(0.203 – 0.254)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
NOTE:
INCHES
1. DIMENSIONS IN
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
SO8 0303
sn623012 623012fas
22
LT6230/LT6230-10/
LT6231/LT6232
U
PACKAGE DESCRIPTIO
GN Package
16-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
.189 – .196*
(4.801 – 4.978)
.045 ±.005
.009
(0.229)
REF
16 15 14 13 12 11 10 9
.254 MIN
.150 – .165
.229 – .244
.150 – .157**
(5.817 – 6.198)
(3.810 – 3.988)
.0165 ±.0015
.0250 BSC
RECOMMENDED SOLDER PAD LAYOUT
1
2
3
4
5
6
7
8
.015 ± .004
(0.38 ± 0.10)
× 45°
.0532 – .0688
(1.35 – 1.75)
.004 – .0098
(0.102 – 0.249)
.007 – .0098
(0.178 – 0.249)
0° – 8° TYP
.016 – .050
(0.406 – 1.270)
.0250
(0.635)
BSC
.008 – .012
GN16 (SSOP) 0204
(0.203 – 0.305)
TYP
NOTE:
1. CONTROLLING DIMENSION: INCHES
INCHES
2. DIMENSIONS ARE IN
(MILLIMETERS)
3. DRAWING NOT TO SCALE
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
sn623012 623012fas
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
23
LT6230/LT6230-10/
LT6231/LT6232
U
TYPICAL APPLICATIO S
The LT6230 is applied as a transimpedance amplifier with
an I-to-V conversion gain of 1.5kΩ set by R1. The LT6230
is ideally suited to this application because of its low input
offset voltage and current, and its low noise. This is be-
cause the 1.5k resistor has an inherent thermal noise of
5nV/√Hz or 3.4pA/√Hz at room temperature, while the
LT6230 contributes only 1.1nV and 2.4pA /√Hz. So, with
respect to both voltage and current noises, the LT6230 is
actually quieter than the gain resistor.
the photodiode, it induces a current IPD which flows into
the amplifier circuit. The amplifier output falls negative to
maintain balance at its inputs. The transfer function is
thereforeVOUT =–IPD •1.5k. C1ensuresstabilityandgood
settling characteristics. Output offset was measured
at 280µV, so low in part because R2 serves to cancel the
DC effects of bias current. Output noise was measured at
1.1mVP–P ona100MHzmeasurementbandwidth, withC2
shunting R2’s thermal noise. As shown in the scope
photo, the rise time is 17ns, indicating a signal bandwidth
of 20MHz.
Thecircuitusesanavalanchephotodiodewiththecathode
biased to approximately 200V. When light is incident on
Low Power Avalanche Photodiode Transimpedance Amplifier
IS = 3.3mA
Photodiode Amplifier Time Domain Response
≈ 200V BIAS
C1
4.7pF
ADVANCED PHOTONIX
012-70-62-541
WWW.ADVANCEDPHOTONIX.COM
R1
1.5k
5V
–
R2
1.5k
LT6230
+
50ns/DIV
–5V
ENABLE
623012 TA02b
623012 TA02a
C2
0.1µF
OUTPUT OFFSET = 500µV TYPICAL
BANDWIDTH = 20MHz
OUTPUT NOISE = 1.1mV
(100MHz MEASUREMENT BW)
P–P
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PART NUMBER
DESCRIPTION
COMMENTS
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LT1677
3V Operation, 2.5mA, 4.5nV/√Hz, 60µV Max V
OS
LT1806/LT1807
LT6200/LT6201
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0.95nV√Hz, Rail-to-Rail Input and Output
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1.9nV/√Hz, 3mA Max, 100MHz Gain Bandwidth
sn623012 623012fas
LT/TP 0304 1K REV A • PRINTED IN USA
24 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
●
LINEAR TECHNOLOGY CORPORATION 2003
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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