LT1499CSTR [Linear]
Driving A-to-D Converters; 驾驶A-模数转换器
| 型号： | LT1499CSTR |
| 厂家： | 
Linear |
| 描述： | Driving A-to-D Converters |
| 文件： | 总20页 (文件大小：268K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1498/LT1499
10MHz, 6V/µs, Dual/Quad
Rail-to-Rail Input and Output
Precision C-Load Op Amps
FEATURES
DESCRIPTION
The LT®1498/LT1499 are dual/quad, rail-to-rail input and
output precision C-Load™ op amps with a 10MHz gain-
bandwidth product and a 6V/μs slew rate.
n
Rail-to-Rail Input and Output
+
–
n
n
n
n
n
n
n
n
n
n
n
n
n
475μV Max V from V to V
OS
Gain-Bandwidth Product: 10MHz
Slew Rate: 6V/μs
The LT1498/LT1499 are designed to maximize input
dynamic range by delivering precision performance over
the full supply voltage. Using a patented technique, both
input stages of the LT1498/LT1499 are trimmed, one at
the negative supply and the other at the positive supply.
Theresultingguaranteedcommonmoderejectionismuch
better than other rail-to-rail input op amps. When used as
a unity-gain buffer in front of single supply 12-bit A-to-D
converters, the LT1498/LT1499 are guaranteed to add less
than 1LSB of error even in single 3V supply systems.
Low Supply Current per Amplifier: 1.7mA
Input Offset Current: 65nA Max
Input Bias Current: 650nA Max
Open-Loop Gain: 1000V/mV Min
Low Input Noise Voltage: 12nV/√Hz Typ
Wide Supply Range: 2.2V to 15V
Large Output Drive Current: 30mA
Stable for Capacitive Loads Up to 10,000pF
Dual in 8-Pin PDIP and SO Package
Quad in Narrow 14-Pin SO
With 110dB of supply rejection, the LT1498/LT1499 main-
tain their performance over a supply range of 2.2V to 36V
and are specified for 3V, 5V and 15V supplies. The inputs
canbedrivenbeyondthesupplieswithoutdamageorphase
reversal of the output. These op amps remain stable while
driving capacitive loads up to 10,000pF.
APPLICATIONS
n
Driving A-to-D Converters
n
Active Filters
n
Rail-to-Rail Buffer Amplifiers
n
Low Voltage Signal Processing
The LT1498 is available with the standard dual op amp
configurationin8-pinPDIPandSOpackaging.TheLT1499
features the standard quad op amp configuration and is
available in a 14-pin plastic SO package. These devices
can be used as plug-in replacements for many standard
op amps to improve input/output range and precision.
n
Battery-Powered Systems
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and C-Load
is a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
TYPICAL APPLICATION
Frequency Response
10
V
V
= 2.7V
P-P
= 3V
IN
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
+
Single Supply 100kHz 4th Order Butterworth Filter
6.81k
11.3k
100pF
5.23k
10.2k
47pF
6.81k
–
+
V
V
IN
5.23k
–
330pF
1/2 LT1498
+
1000pF
V
OUT
1/2 LT1498
+
+
1498 TA01
V /2
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
1498 TA02
14989fe
1
LT1498/LT1499
ABSOLUTE MAXIMUM RATINGS
(Note 1)
+
–
Total Supply Voltage (V to V ).................................36V
Input Current........................................................ 10mA
Output Short-Circuit Duration (Note 2).........Continuous
Operating Temperature Range
Specified Temperature Range (Note 4)
LT1498/LT1499....................................–40°C to 85°C
LT1498MP ......................................... –55°C to 125°C
Junction Temperature ........................................... 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)...................300°C
LT1498/LT1499....................................–40°C to 85°C
LT1498MP ......................................... –55°C to 125°C
PIN CONFIGURATION
TOP VIEW
OUTA
–IN A
+IN A
1
2
3
4
5
6
7
14
13
12
11
10
8
OUT D
–IN D
+IN D
TOP VIEW
TOP VIEW
+
+
OUT A
–IN A
+IN A
1
2
3
4
V
OUT A
–IN A
+IN A
1
2
3
4
8
7
6
5
V
8
7
6
5
A
B
D
C
OUT B
–IN B
+IN B
OUT B
–IN B
+IN B
+
–
A
V
A
V
+IN B
–IN B
+IN C
–IN C
OUT C
B
B
–
–
V
V
N8 PACKAGE
8-LEAD PLASTIC DIP
= 150°C, θ = 130°C/W
S8 PACKAGE
8-LEAD PLASTIC SO
= 150°C, θ = 130°C/W
OUT B
8
T
JMAX
T
JMAX
S PACKAGE
14-LEAD PLASTIC SO
= 150°C, θ = 150°C/W
JA
JA
T
JMAX
JA
ORDER INFORMATION
LEAD FREE FINISH
LT1498CN8#PBF
LT1498CS8#PBF
LT1498IN8#PBF
LT1498IS8#PBF
LT1498MPS8#PBF
LT1499CS#PBF
LT1499IS#PBF
LEAD BASED FINISH
LT1498CN8
TAPE AND REEL
LT1498CN8#TRPBF
LT1498CS8#TRPBF
LT1498IN8#TRPBF
LT1498IS8#TRPBF
LT1498MPS8#TRPBF
LT1499CS#TRPBF
LT1499IS#TRPBF
TAPE AND REEL
LT1498CN8#TR
LT1498CS8#TR
LT1498IN8#TR
PART MARKING*
1498
PACKAGE DESCRIPTION
8-Lead Plastic PDIP
8-Lead Plastic SO
8-Lead Plastic PDIP
8-Lead Plastic SO
8-Lead Plastic SO
14-Lead Plastic SO
14-Lead Plastic SO
PACKAGE DESCRIPTION
8-Lead Plastic PDIP
8-Lead Plastic SO
8-Lead Plastic PDIP
8-Lead Plastic SO
8-Lead Plastic SO
14-Lead Plastic SO
14-Lead Plastic SO
TEMPERATURE RANGE
0°C to 70°C
1498
0°C to 70°C
1498I
–40°C to 85°C
–40°C to 85°C
–55°C to 125°C
0°C to 70°C
1498I
1498MP
1498
1498I
–40°C to 85°C
TEMPERATURE RANGE
0°C to 70°C
PART MARKING*
1498
LT1498CS8
1498
0°C to 70°C
LT1498IN8
1498I
–40°C to 85°C
–40°C to 85°C
–55°C to 125°C
0°C to 70°C
LT1498IS8
LT1498IS8#TR
1498I
LT1498MPS8
LT1499CS
LT1498MPS8#TR
LT1499CS#TR
1498MP
1498
LT1499IS
LT1499IS#TR
1498I
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
14989fe
2
LT1498/LT1499
ELECTRICAL CHARACTERISTICS TA = 25°C, VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless
otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
+
–
V
OS
Input Offset Voltage
V
V
= V
= V
150
150
475
475
μV
μV
CM
CM
–
+
Input Offset Voltage Shift
V
V
= V to V
150
200
425
750
μV
μV
ΔV
CM
CM
OS
+
–
Input Offset Voltage Match (Channel-to-Channel)
Input Bias Current
= V , V (Note 5)
+
I
B
V
V
= V
0
250
–250
650
0
nA
nA
CM
CM
–
= V
–650
–
+
Input Bias Current Shift
V
= V to V
500
1300
nA
ΔI
B
CM
+
–
Input Bias Current Match (Channel-to-Channel)
V
CM
V
CM
= V (Note 5)
0
10
–10
100
0
nA
nA
= V (Note 5)
–100
+
I
OS
Input Offset Current
V
V
= V
5
5
65
65
nA
nA
CM
CM
–
= V
–
+
Input Offset Current Shift
Input Noise Voltage
V
= V to V
10
400
12
130
nA
ΔI
CM
OS
0.1Hz to 10Hz
f = 1kHz
nV
P-P
e
n
Input Noise Voltage Density
Input Noise Current Density
Input Capacitance
nV/√Hz
pA/√Hz
pF
i
n
f = 1kHz
0.3
5
C
IN
A
VOL
Large-Signal Voltage Gain
V = 5V, V = 75mV to 4.8V, R = 10k
600
500
3800
2000
V/mV
V/mV
S
O
L
V = 3V, V = 75mV to 2.8V, R = 10k
S
O
L
–
–
+
+
CMRR
Common Mode Rejection Ratio
V = 5V, V = V to V
81
76
90
86
dB
dB
S
CM
V = 3V, V = V to V
S
CM
–
–
+
+
CMRR Match (Channel-to-Channel) (Note 5)
V = 5V, V = V to V
75
70
91
86
dB
dB
S
CM
V = 3V, V = V to V
S
CM
PSRR
Power Supply Rejection Ratio
V = 2.2V to 12V, V = V = 0.5V
88
82
105
103
dB
dB
S
CM
O
PSRR Match (Channel-to-Channel) (Note 5)
Output Voltage Swing (Low) (Note 6)
V = 2.2V to 12V, V = V = 0.5V
S
CM
O
V
V
No Load
14
35
90
30
70
mV
mV
mV
OL
I
I
= 0.5mA
= 2.5mA
SINK
SINK
200
Output Voltage Swing (High) (Note 6)
Short-Circuit Current
No Load
SOURCE
SOURCE
2.5
50
140
10
100
250
mV
mV
mV
OH
I
I
= 0.5mA
= 2.5mA
I
I
V = 5V
12.5
12.0
24
19
mA
mA
SC
S
V = 3V
S
Supply Current per Amplifier
Gain-Bandwidth Product (Note 7)
Slew Rate (Note 8)
1.7
2.2
mA
S
GBW
SR
6.8
10.5
MHz
V = 5V, A = –1, R = Open, V = 4V
2.6
2.3
4.5
4.0
V/μs
V/μs
S
S
V
V
L
L
O
V = 3V, A = –1, R = Open
The l denotes the specifications which apply over the temperature range 0°C < TA < 70°C. VS = 5V, 0V; VS = 3V, 0V;
VCM = VOUT = half supply, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
+
–
l
l
V
Input Offset Voltage
V
CM
V
CM
= V
175
175
650
650
μV
μV
OS
= V + 0.1V
l
l
V
TC
Input Offset Voltage Drift (Note 3)
0.5
1.5
2.5
4.0
μV/°C
μV/°C
OS
+
V
CM
V
CM
V
CM
= V
–
+
l
l
Input Offset Voltage Shift
= V + 0.1V to V
170
200
600
900
μV
μV
ΔV
OS
–
+
Input Offset Voltage Match (Channel-to-Channel)
= V + 0.1V, V (Note 5)
14989fe
3
LT1498/LT1499
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the temperature range
0°C < TA < 70°C. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
+
–
l
l
I
B
Input Bias Current
V
V
= V
0
275
–275
780
0
nA
nA
CM
CM
= V + 0.1V
–780
–
+
l
Input Bias Current Shift
V
CM
= V + 0.1V to V
550
1560
nA
ΔI
B
+
–
l
l
Input Bias Current Match (Channel-to-Channel)
V
CM
V
CM
= V (Note 5)
0
15
–15
170
0
nA
nA
= V + 0.1V (Note 5)
–170
+
–
l
l
I
Input Offset Current
V
CM
V
CM
= V
10
10
85
85
nA
nA
OS
= V + 0.1V
–
+
l
Input Offset Current Shift
Large-Signal Voltage Gain
V
= V + 0.1V to V
20
170
nA
ΔI
CM
OS
l
l
A
VOL
V = 5V, V = 75mV to 4.8V, R = 10k
V = 3V, V = 75mV to 2.8V, R = 10k
500
400
2500
2000
V/mV
V/mV
S
S
O
O
L
L
–
–
+
+
l
l
CMRR
Common Mode Rejection Ratio
V = 5V, V = V + 0.1V to V
78
73
89
85
dB
dB
S
CM
V = 3V, V = V + 0.1V to V
S
CM
–
–
+
+
l
l
CMRR Match (Channel-to-Channel) (Note 5)
V = 5V, V = V + 0.1V to V
74
69
90
86
dB
dB
S
CM
V = 3V, V = V + 0.1V to V
S
CM
l
l
PSRR
Power Supply Rejection Ratio
V = 2.3V to 12V, V = V = 0.5V
86
80
102
102
dB
dB
S
CM
O
PSRR Match (Channel-to-Channel) (Note 5)
Output Voltage Swing (Low) (Note 6)
V = 2.3V to 12V, V = V = 0.5V
S
CM
O
l
l
l
V
No Load
17
40
110
35
80
mV
mV
mV
OL
OH
I
I
= 0.5mA
= 2.5mA
SINK
SINK
220
l
l
l
V
Output Voltage Swing (High) (Note 6)
Short-Circuit Current
No Load
SOURCE
SOURCE
3.5
55
160
15
120
300
mV
mV
mV
I
I
= 0.5mA
= 2.5mA
l
l
I
I
V = 5V
12
10
23
20
mA
mA
SC
S
V = 3V
S
l
l
Supply Current per Amplifier
Gain-Bandwidth Product (Note 7)
Slew Rate (Note 8)
1.9
9
2.6
mA
S
GBW
SR
6.1
MHz
l
l
V = 5V, A = –1, R = Open, V = 4V
2.5
2.2
4.0
3.5
V/μs
V/μs
S
S
V
V
L
L
O
V = 3V, A = –1, R = Open
The l denotes the specifications which apply over the temperature range –40°C < TA < 85°C. VS = 5V, 0V; VS = 3V, 0V;
VCM = VOUT = half supply, unless otherwise noted. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
+
–
l
l
V
OS
Input Offset Voltage
V
CM
V
CM
= V
250
250
750
750
μV
μV
= V + 0.1V
l
l
V
TC
Input Offset Voltage Drift (Note 3)
0.5
1.5
2.5
4.0
μV/°C
μV/°C
OS
+
V
V
V
= V
CM
CM
CM
–
+
l
l
Input Offset Voltage Shift
= V + 0.1V to V
250
300
650
μV
μV
ΔV
OS
–
+
Input Offset Voltage Match (Channel-to-Channel)
Input Bias Current
= V + 0.1V, V (Note 5)
1500
+
–
l
l
I
B
V
V
= V
0
350
–350
975
0
nA
nA
CM
CM
= V + 0.1V
–975
–
+
l
Input Bias Current Shift
V
CM
= V + 0.1V to V
700
1950
nA
ΔI
B
+
–
l
l
Input Bias Current Match (Channel-to-Channel)
V
CM
V
CM
= V (Note 5)
0
30
–30
180
0
nA
nA
= V + 0.1V (Note 5)
–180
+
–
l
l
I
Input Offset Current
V
CM
V
CM
= V
15
15
110
110
nA
nA
OS
= V + 0.1V
–
+
l
Input Offset Current Shift
V
CM
= V + 0.1V to V
30
220
nA
ΔI
OS
14989fe
4
LT1498/LT1499
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the temperature range
–40°C < TA < 85°C. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted. (Note 4)
SYMBOL PARAMETER
CONDITIONS
V = 5V, V = 75mV to 4.8V, R = 10k
MIN
TYP
MAX
UNITS
l
l
A
VOL
Large-Signal Voltage Gain
400
300
2500
2000
V/mV
V/mV
S
O
L
V = 3V, V = 75mV to 2.8V, R = 10k
S
O
L
–
–
+
+
l
l
CMRR
PSRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 5)
V = 5V, V = V + 0.1V to V
77
73
86
81
dB
dB
S
CM
V = 3V, V = V + 0.1V to V
S
CM
–
–
+
+
l
l
V = 5V, V = V + 0.1V to V
72
69
86
83
dB
dB
S
CM
V = 3V, V = V + 0.1V to V
S
CM
l
l
Power Supply Rejection Ratio
V = 2.5V to 12V, V = V = 0.5V
86
80
100
100
dB
dB
S
CM
O
PSRR Match (Channel-to-Channel) (Note 5)
Output Voltage Swing (Low) (Note 6)
V = 2.5V to 12V, V = V = 0.5V
S
CM
O
l
l
l
V
No Load
18
45
110
40
80
mV
mV
mV
OL
OH
I
I
= 0.5mA
= 2.5mA
SINK
SINK
220
l
l
l
V
Output Voltage Swing (High) (Note 6)
Short-Circuit Current
No Load
3.5
60
170
15
120
300
mV
mV
mV
I
I
= 0.5mA
= 2.5mA
SOURCE
SOURCE
l
l
I
I
V = 5V
7.5
7.5
15
15
mA
mA
SC
S
V = 3V
S
l
l
Supply Current per Amplifier
Gain-Bandwidth Product (Note 7)
Slew Rate (Note 8)
2.0
8.5
2.7
mA
S
GBW
SR
5.8
MHz
l
l
V = 5V, A = –1, R = Open, V = 4V
V = 3V, A = –1, R = Open
2.2
1.9
3.6
3.2
V/μs
V/μs
S
V
L
O
S
V
L
The l denotes the specifications which apply over the temperature range –55°C < TA < 125°C. VS = 5V, 0V; VS = 3V, 0V;
VCM = VOUT = half supply, unless otherwise noted. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
+
–
l
l
V
OS
Input Offset Voltage
V
CM
V
CM
= V – 0.5V
300
300
1100
1100
μV
μV
= V + 0.5V
l
l
V
TC
Input Offset Voltage Drift (Note 3)
0.5
1.5
μV/°C
μV/°C
OS
+
V
V
V
= V – 0.5V
CM
CM
CM
–
+
l
l
Input Offset Voltage Shift
= V + 0.5V to V – 0.5V
250
300
2300
1900
μV
μV
ΔV
OS
–
+
Input Offset Voltage Match (Channel-to-Channel)
Input Bias Current
= V + 0.5V, V – 0.5V (Note 5)
+
l
l
I
B
V
V
= V – 0.5V
0
450
–450
1100
0
nA
nA
CM
CM
–
= V + 0.5V
–1100
–
+
l
Input Bias Current Shift
V
CM
= V + 0.5V to V – 0.5V
900
2200
nA
ΔI
B
+
–
l
l
Input Bias Current Match (Channel-to-Channel)
V
CM
V
CM
= V – 0.5V (Note 5)
0
40
–40
400
0
nA
nA
= V + 0.5V (Note 5)
–400
+
–
l
l
I
Input Offset Current
V
CM
V
CM
= V – 0.5V
40
40
300
300
nA
nA
OS
= V + 0.5V
–
+
l
Input Offset Current Shift
Large-Signal Voltage Gain
V
= V + 0.5V to V – 0.5V
80
600
nA
ΔI
CM
OS
l
l
A
VOL
V = 5V, V = 0.5mV to 4.5V, R = 10k
V = 3V, V = 0.5mV to 2.5V, R = 10k
40
20
210
210
V/mV
V/mV
S
S
O
O
L
L
–
–
+
+
l
l
CMRR
Common Mode Rejection Ratio
V = 5V, V = V + 0.5V to V – 0.5V
66
62
80
75
dB
dB
S
CM
V = 3V, V = V + 0.5V to V – 0.5V
S
CM
–
–
+
+
l
l
CMRR Match (Channel-to-Channel) (Note 5)
V = 5V, V = V + 0.5V to V – 0.5V
62
58
80
75
dB
dB
S
CM
V = 3V, V = V + 0.5V to V – 0.5V
S
CM
l
l
PSRR
Power Supply Rejection Ratio
V = 2.5V to 12V, V = V = 0.5V
86
80
100
100
dB
dB
S
CM
O
PSRR Match (Channel-to-Channel) (Note 5)
V = 2.5V to 12V, V = V = 0.5V
S CM O
14989fe
5
LT1498/LT1499
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the temperature range
–55°C < TA < 125°C. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
l
l
l
V
Output Voltage Swing (Low) (Note 6)
Output Voltage Swing (High) (Note 6)
Short-Circuit Current
No Load
SINK
SINK
22
45
50
80
mV
mV
mV
OL
I
I
= 0.5mA
= 2.5mA
110
220
l
l
l
V
OH
No Load
SOURCE
SOURCE
3.5
60
170
20
120
350
mV
mV
mV
I
I
= 0.5mA
= 2.5mA
l
l
I
I
V = 5V
5
5
15
15
mA
mA
SC
S
V = 3V
S
l
l
Supply Current per Amplifier
Gain-Bandwidth Product (Note 7)
Slew Rate (Note 8)
2.4
8.5
3.0
mA
S
GBW
SR
5.8
MHz
l
l
V = 5V, A = –1, R = Open, V = 4V
2.0
1.7
3.6
3.2
V/μs
V/μs
S
V
V
L
L
O
V = 3V, A = –1, R = Open
S
TA = 25°C. VS = 15V, VCM = 0V, VOUT = 0V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
+
–
V
OS
Input Offset Voltage
V
CM
V
CM
= V
= V
200
200
800
800
μV
μV
–
+
Input Offset Voltage Shift
V
V
= V to V
150
250
650
μV
μV
ΔV
CM
CM
OS
+
–
Input Offset Voltage Match (Channel-to-Channel)
Input Bias Current
= V , V (Note 5)
1400
+
–
I
V
CM
V
CM
= V
= V
0
250
–250
715
0
nA
nA
B
–715
–
+
Input Bias Current Shift
V
CM
= V to V
500
1430
nA
ΔI
B
+
–
Input Bias Current Match (Channel-to-Channel)
V
CM
V
CM
= V (Note 5)
0
12
–12
120
0
nA
nA
= V (Note 5)
–120
+
–
I
Input Offset Current
V
CM
V
CM
= V
= V
6
6
70
70
nA
nA
OS
–
+
Input Offset Current Shift
Input Noise Voltage
V
= V to V
12
400
12
140
nA
ΔI
CM
OS
0.1Hz to 10Hz
f = 1kHz
nV
P-P
e
n
Input Noise Voltage Density
Input Noise Current Density
Large-Signal Voltage Gain
nV/√Hz
pA/√Hz
i
n
f = 1kHz
0.3
A
VOL
V = –14.5V to 14.5V, R = 10k
V = –10V to 10V, R = 2k
1000
500
5200
2300
V/mV
V/mV
O
O
L
L
Channel Separation
V = –10V to 10V, R = 2k
116
93
87
89
83
130
106
103
110
105
dB
dB
dB
dB
dB
O
L
–
+
CMRR
PSRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 5)
Power Supply Rejection Ratio
V
CM
V
CM
= V to V
–
+
= V to V
V = 5V to 15V
S
PSRR Match (Channel-to-Channel) (Note 5)
Output Voltage Swing (Low) (Note 6)
V = 5V to 15V
S
V
V
No Load
18
40
230
30
80
500
mV
mV
mV
OL
OH
I
I
= 0.5mA
= 10mA
SINK
SINK
Output Voltage Swing (High) (Note 6)
No Load
SOURCE
SOURCE
2.5
55
420
10
120
800
mV
mV
mV
I
I
= 0.5mA
= 10mA
14989fe
6
LT1498/LT1499
ELECTRICAL CHARACTERISTICS TA = 25°C. VS = 15V, VCM = 0V, VOUT = 0V, unless otherwise noted.
I
I
Short-Circuit Current
15
30
1.8
10.5
6
mA
mA
SC
Supply Current per Amplifier
Gain-Bandwidth Product (Note 7)
Slew Rate
2.5
S
GBW
SR
6.8
3.5
MHz
V/μs
A = –1, R = Open, V = 10V
V
L
O
Measure at V = 5V
O
The l denotes the specifications which apply over the temperature range 0°C < TA < 70°C. VS = 15V, VCM = 0V, VOUT = 0V, unless
otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
+
–
l
l
V
OS
Input Offset Voltage
V
CM
V
CM
= V
200
200
900
900
μV
μV
= V + 0.1V
l
l
V
TC
Input Offset Voltage Drift (Note 3)
1.0
2.0
3.5
5.0
μV/°C
μV/°C
OS
+
V
V
V
= V
CM
CM
CM
–
+
l
l
ΔV
Input Offset Voltage Shift
= V + 0.1V to V
200
350
750
μV
μV
OS
–
+
Input Offset Voltage Match (Channel-to-Channel)
Input Bias Current
= V + 0.1V, V (Note 5)
1500
+
–
l
l
I
B
V
V
= V
0
300
–300
875
0
nA
nA
CM
CM
= V + 0.1V
–875
–
+
l
Input Bias Current Shift
V
CM
= V + 0.1V to V
600
1750
nA
ΔI
B
+
–
l
l
Input Bias Current Match (Channel-to-Channel)
V
CM
V
CM
= V (Note 5)
0
20
–20
180
0
nA
nA
= V + 0.1V (Note 5)
–180
+
–
l
l
I
Input Offset Current
V
CM
V
CM
= V
15
15
90
90
nA
nA
OS
= V + 0.1V
–
+
l
Input Offset Current Shift
Large-Signal Voltage Gain
V
= V + 0.1V to V
30
180
nA
ΔI
CM
OS
l
l
A
VOL
V = –14.5V to 14.5V, R = 10k
V = –10V to 10V, R = 2k
900
400
5000
2000
V/mV
V/mV
O
O
L
L
l
l
l
l
l
Channel Separation
V = –10V to 10V, R = 2k
112
92
86
88
82
125
103
103
103
103
dB
dB
dB
dB
dB
O
L
–
+
CMRR
PSRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 5)
Power Supply Rejection Ratio
V
CM
V
CM
= V + 0.1V to V
–
+
= V + 0.1V to V
V = 5V to 15V
S
PSRR Match (Channel-to-Channel) (Note 5)
Output Voltage Swing (Low) (Note 6)
V = 5V to 15V
S
l
l
l
V
No Load
18
45
270
40
90
mV
mV
mV
OL
OH
I
I
= 0.5mA
= 10mA
SINK
SINK
520
l
l
l
V
Output Voltage Swing (High) (Note 6)
No Load
SOURCE
SOURCE
3.5
60
480
15
mV
mV
mV
I
I
= 0.5mA
= 10mA
120
1000
l
l
l
l
I
I
Short-Circuit Current
12
28
1.9
9
mA
mA
SC
Supply Current per Amplifier
Gain-Bandwidth Product (Note 7)
Slew Rate
2.8
S
GBW
SR
6.1
3.4
MHz
V/μs
A = –1, R = Open, V = 10V
5.3
V
L
O
Measured at V = 5V
O
14989fe
7
LT1498/LT1499
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the temperature range
–40°C < TA < 85°C. VS = 15V, VCM = 0V, VOUT = 0V, unless otherwise noted. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
+
–
l
l
V
OS
Input Offset Voltage
V
CM
V
CM
= V
300
300
950
950
μV
μV
= V + 0.1V
l
l
V
TC
Input Offset Voltage Drift (Note 3)
1.0
2.0
3.5
5.0
μV/°C
μV/°C
OS
+
V
V
V
= V
CM
CM
CM
–
+
l
l
Input Offset Voltage Shift
= V + 0.1V to V
250
350
850
μV
μV
ΔV
OS
–
+
Input Offset Voltage Match (Channel-to-Channel)
Input Bias Current
= V + 0.1V, V (Note 5)
1800
+
–
l
l
I
V
V
= V
0
350
–350
1050
0
nA
nA
B
CM
CM
= V + 0.1V
–1050
–
+
l
Input Bias Current Shift
V
CM
= V + 0.1V to V
700
2100
nA
ΔI
B
+
–
l
l
Input Bias Current Match (Channel-to-Channel)
V
CM
V
CM
= V (Note 5)
0
20
–20
200
0
nA
nA
= V + 0.1V (Note 5)
–200
+
–
l
l
I
Input Offset Current
V
CM
V
CM
= V
15
15
115
115
nA
nA
OS
= V + 0.1V
–
+
l
Input Offset Current Shift
Large-Signal Voltage Gain
V
= V + 0.1V to V
30
230
nA
ΔI
CM
OS
l
l
A
VOL
V = –14.5V to 14.5V, R = 10k
V = –10V to 10V, R = 2k
800
350
5000
2000
V/mV
V/mV
O
O
L
L
l
l
l
l
l
Channel Separation
V = –10V to 10V, R = 2k
110
90
86
88
82
120
101
100
100
100
dB
dB
dB
dB
dB
O
L
–
+
CMRR
PSRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 5)
Power Supply Rejection Ratio
V
CM
V
CM
= V + 0.1V to V
–
+
= V + 0.1V to V
V = 5V to 15V
S
PSRR Match (Channel-to-Channel) (Note 5)
Output Voltage Swing (Low) (Note 6)
V = 5V to 15V
S
l
l
l
V
No Load
25
50
275
50
mV
mV
mV
OL
OH
I
I
= 0.5mA
= 10mA
100
520
SINK
SINK
l
l
l
V
Output Voltage Swing (High) (Note 6)
No Load
SOURCE
SOURCE
3.5
65
500
15
mV
mV
mV
I
I
= 0.5mA
= 10mA
120
1000
l
l
l
l
I
I
Short-Circuit Current
10
18
2.0
mA
mA
SC
Supply Current per Amplifier
Gain-Bandwidth Product (Note 7)
Slew Rate
3.0
S
GBW
SR
5.8
3
8.5
MHz
V/μs
A = –1, R = Open, V = 10V
4.75
V
L
O
Measure at V = 5V
O
14989fe
8
LT1498/LT1499
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the temperature range
–55°C < TA < 125°C. VS = 15V, VCM = 0V, VOUT = 0V, unless otherwise noted. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
+
–
l
l
V
OS
Input Offset Voltage
V
CM
V
CM
= V – 0.5V
350
350
1300
1300
μV
μV
= V + 0.5V
l
l
V
TC
Input Offset Voltage Drift (Note 3)
1.0
2.0
μV/°C
μV/°C
OS
+
V
V
V
= V – 0.5V
CM
CM
CM
–
+
l
l
Input Offset Voltage Shift
= V + 0.5V to V – 0.5V
250
400
1500
2200
μV
μV
ΔV
OS
–
+
Input Offset Voltage Match (Channel-to-Channel)
Input Bias Current
= V + 0.5V, V – 0.5V (Note 5)
+
l
l
I
B
V
V
= V – 0.5V
0
500
–500
1200
0
nA
nA
CM
CM
–
= V + 0.5V
–1200
–
+
l
Input Bias Current Shift
V
CM
= V + 0.5V to V – 0.5V
1000
2400
nA
ΔI
B
+
–
l
l
Input Bias Current Match (Channel-to-Channel)
V
CM
V
CM
= V – 0.5V (Note 5)
0
40
–40
400
0
nA
nA
= V + 0.5V (Note 5)
–400
+
–
l
l
I
Input Offset Current
V
CM
V
CM
= V – 0.5V
40
40
300
300
nA
nA
OS
= V + 0.5V
–
+
l
l
l
l
l
l
l
Input Offset Current Shift
V
= V + 0.5V to V – 0.5V
80
600
nA
V/mV
dB
ΔI
CM
OS
A
VOL
Large-Signal Voltage Gain
V = –14.5V to 14.5V, R = 10k
40
110
86
400
120
100
100
100
100
O
L
Channel Separation
V = –10V to 10V, R = 2k
O
L
+
–
CMRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 5)
Power Supply Rejection Ratio
PSRR Match (Channel-to-Channel) (Note 5)
Output Voltage Swing (Low) (Note 6)
V
CM
V
CM
= V + 0.5V to V – 0.5V
dB
–
+
= V + 0.5V to V – 0.5V
80
dB
PSRR
V = 5V to 15V
88
dB
S
V = 5V to 15V
80
dB
S
l
l
l
V
No Load
25
50
275
75
100
520
mV
mV
mV
OL
OH
I
I
= 0.5mA
= 10mA
SINK
SINK
l
l
l
V
Output Voltage Swing (High) (Note 6)
No Load
3.5
65
500
20
mV
mV
mV
I
I
= 0.5mA
= 10mA
120
SOURCE
SOURCE
1400
l
l
l
l
I
I
Short-Circuit Current
7.5
12
2.5
mA
mA
SC
Supply Current per Amplifier
Gain-Bandwidth Product (Note 7)
Slew Rate
3.2
S
GBW
SR
5.8
2.2
8.5
MHz
V/μs
A = –1, R = Open, V = 10V
4.75
V
L
O
Measure at V = 5V
O
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 5: Matching parameters are the difference between amplifiers A and
D and between B and C on the LT1499; between the two amplifiers on the
LT1498.
Note 6: Output voltage swings are measured between the output and
Note 2: A heat sink may be required to keep the junction temperature
below the absolute maximum rating when the output is shorted
indefinitely.
power supply rails.
Note 7: V = 3V, V = 15V GBW limit guaranteed by correlation to
S
S
5V tests.
Note 3: This parameter is not 100% tested.
Note 8: V = 3V, V = 5V slew rate limit guaranteed by correlation to
S
S
Note 4: The LT1498C/LT1499C are guaranteed to meet specified
performance from 0°C to 70°C. The LT1498C/LT1499C 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. The
LT1498I/LT1499I are guaranteed to meet specified performance from
–40°C to 85°C. The LT1498MP is guaranteed to meet specified
performance from –55°C to 125°C.
15V tests.
14989fe
9
LT1498/LT1499
TYPICAL PERFORMANCE CHARACTERISTICS
VOS Distribution, VCM = 0V
(PNP Stage)
VOS Distribution VCM = 5V
(NPN Stage)
ΔVOS Shift for VCM = 0V to 5V
25
20
15
25
20
15
25
20
15
LT1498: N8, S8 PACKAGES
LT1499: S14 PACKAGE
LT1498: N8, S8 PACKAGES
LT1499: S14 PACKAGE
LT1498: N8, S8 PACKAGES
LT1499: S14 PACKAGE
V
V
= 5V, 0V
CM
V
V
= 5V, 0V
CM
V
V
= 5V, 0V
CM
S
S
S
= 0V
= 5V
= 0V TO 5V
10
5
10
5
10
5
0
0
0
–500
–300
–100
100
300
500
–500
–300
–100
100
300
500
–500
–300
–100
100
300
500
INPUT OFFSET VOLTAGE (μV)
INPUT OFFSET VOLTAGE (μV)
INPUT OFFSET VOLTAGE (μV)
14989 G01
14989 G02
14989 G03
Input Bias Current
Supply Current vs Supply Voltage
Supply Current vs Temperature
vs Common Mode Voltage
2.0
1.5
400
300
2.0
1.5
1.0
0.5
0
V
= 5V, 0V
V
S
= p15V
S
T
= 125°C
= 25°C
A
T
V
S
= 5V, 0V
A
200
100
T
= –55°C
A
1.0
0.5
0
0
–100
–200
–300
–400
T
= 125°C
A
T
= 25°C
T = –55°C
A
A
–25
0
50
75 100 125
–50
25
0
16 20
–2 –1
1
2
3
4
5
6
0
4
8
12
24 28 32 36
TEMPERATURE (°C)
COMMON MODE VOLTAGE (V)
TOTAL SUPPLY VOLTAGE (V)
14989 G05
14989 G06
14989 G04
Output Saturation Voltage
vs Load Current (Output High)
Output Saturation Voltage
vs Load Current (Output Low)
Input Bias Current vs Temperature
400
300
1000
100
10
1000
100
10
V
CM
= p15V
S
V
= 15V
200
V
= 5V, 0V
S
NPN ACTIVE
PNP ACTIVE
V
= 5V
CM
100
T
A
= 25°C
A
0
T
T
= 125°C
–100
–200
–300
–400
V
S
= p15V
= –15V
= –55°C
A
V
CM
T
A
= –55°C
T
A
= 125°C
A
V
= 5V, 0V
S
V
= 0V
CM
T
= 25°C
1
1
–50 –35 –20 –5 10 25 40 55 70 85 100
0.001
0.01
0.1
1
10
0.001
0.01
0.1
1
10
TEMPERATURE (°C)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
14989 G08
14989 G09
14989 G07
14989fe
10
LT1498/LT1499
TYPICAL PERFORMANCE CHARACTERISTICS
0.1Hz to 10Hz
Minimum Supply Voltage
Output Voltage Noise
Noise Voltage Spectrum
200
180
160
140
300
250
200
150
100
50
V
= 5V, 0V
V
V
= p2.5V
CM
S
S
= 0V
120
100
V
= 2.5V
CM
PNP ACTIVE
80
60
40
20
0
V
= 4V
CM
NPN ACTIVE
T
= 85°C
T = 70°C
A
A
NONFUNCTIONAL
T
= –55°C
A
T
A
= 25°C
0
4
1
2
3
5
1
10
100
1000
0
10
TOTAL SUPPLY VOLTAGE (V)
TIME (1s/DIV)
FREQUENCY (Hz)
14989 G12
14989 G10
14989 G11
Noise Current Spectrum
Gain and Phase vs Frequency
CMRR vs Frequency
10
9
70
60
180
144
108
72
120
110
100
90
V
= 5V, 0V
R
V
V
= 10k
= p1.5V
= p15V
L
S
S
S
50
8
7
40
PHASE
6
5
30
36
80
V
S
= p15V
20
0
70
V
S
= p2.5V
GAIN
4
3
2
1
0
10
–36
–72
–108
–144
–180
60
V
= 4V
CM
0
50
NPN ACTIVE
–10
–20
–30
40
V
= 2.5V
30
CM
PNP ACTIVE
20
1
10
100
1000
0.01
0.1
1
10
100
1
10
100
1000
10000
FREQUENCY (MHz)
FREQUENCY (kHz)
FREQUENCY (Hz)
14989 G13
14989 G14
14989 G15
Gain Bandwidth and Phase
Margin vs Supply Voltage
PSRR vs Frequency
Channel Separation vs Frequency
90
80
70
60
50
40
30
20
10
0
–50
–60
–70
–80
20
18
100
90
80
70
60
50
40
V
= p2.5V
V
V
= p15V
= p1V
S
S
P-P
OUT
R
= 2k
L
16
14
12
PHASE MARGIN
POSITIVE SUPPLY
–90
NEGATIVE SUPPLY
–100
10
8
GAIN BANDWIDTH
–110
–120
–130
–140
–150
6
4
2
0
30
20
10
0
–10
1
10
100
1000
10000
0.01
0.1
1
10
100
1000
0
5
15
20
25
30
10
FREQUENCY (kHz)
TOTAL SUPPLY VOLTAGE (V)
FREQUENCY (kHz)
14989 G16
14989 G18
14989 G17
14989fe
11
LT1498/LT1499
TYPICAL PERFORMANCE CHARACTERISTICS
Output Step
Capacitive Load Handling
Slew Rate vs Supply Voltage
vs Settling Time to 0.01%
70
60
50
40
30
20
10
0
10
8
9
8
V
A
= 5V, 0V
= 1
= 1k
V
S
= p15V
V
A
= 80% OF V
S
S
V
OUT
V
= –1
NONINVERTING
R
L
6
INVERTING
RISING EDGE
4
7
2
0
6
5
–2
–4
–6
–8
–10
FALLING EDGE
INVERTING
4
3
NONINVERTING
10
100
1000
10000
100000
1.5
2.0
2.5
3.0
3.5
0
4
8
12 16 20 24 28 32 36
CAPACITIVE LOAD (pF)
SETTLING TIME (μs)
TOTAL SUPPLY VOLTAGE (V)
14989 G19
14989 G21
14989 G20
Open-Loop Gain
Open-Loop Gain
Warm-Up Drift vs Time
20
15
4
3
2
1
10
0
V
= p15V
V
S
= 5V, 0V
S
S8 PACKAGE, V = p2.5V
S
10
5
R
= 2k
L
R
R
= 2k
L
N8 PACKAGE, V = p2.5V
S
R
L
= 10k
–10
–20
–30
–40
LT1499CS, V = p2.5V
S
0
0
= 10k
L
S8 PACKAGE, V = p15V
S
–5
–1
N8 PACKAGE, V = p15V
S
–10
–15
–2
–3
–4
LT1499CS, V = p15V
S
–20
0
5
1
2
4
–20 –15 –10 –5
10 15 20
0
5
6
3
80
TIME AFTER POWER-UP (SEC)
0
20 40 60
100 120 140 160
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
14989 G22
14989 G23
14989 G24
Total Harmonic Distortion + Noise
vs Peak-to-Peak Voltage
Total Harmonic Distortion + Noise
vs Frequency
1
0.1
1
f = 1kHz
V
V
= p1.5V
S
R
= 10k
= 2V
P-P
L
IN
= 10k
R
L
A
V
= 1
A
S
= 1
V
0.1
V
= p1.5V
A
S
= 1
V
V
V
= p2.5V
0.01
0.001
A
S
= –1
V
V
= p1.5V
A
V
= –1
A
S
= –1
V
0.01
= p2.5V
0.0001
0.001
0.01
0.1
1
10
100
0
1
2
3
4
)
5
INPUT VOLTAGE (V
FREQUENCY (kHz)
P-P
14989 G25
14989 G26
14989fe
12
LT1498/LT1499
TYPICAL PERFORMANCE CHARACTERISTICS
5V Small-Signal Response
5V Large-Signal Response
14989 G27
14989 G28
V
A
V
= 5V
= 1
V
A
V
= 5V
= 1
200ns/DIV
2μs/DIV
S
V
S
V
= 20mV AT 50kHz
= 4V AT 10kHz
IN
= 1k
P-P
IN
= 1k
P-P
R
L
R
L
15V Small-Signal Response
15V Large-Signal Response
14989 G29
14989 G30
V
= p15V
V
= p15V
200ns/DIV
2μs/DIV
S
V
S
A
V
= 1
A
V
= 1
V
IN
= 20mV AT 50kHz
= 20V AT 10kHz
IN
P-P
P-P
R
= 1k
R
= 1k
L
L
APPLICATIONS INFORMATION
Rail-to-Rail Input and Output
The PNP differential input pair is active for input common
mode voltages, V , between the negative supply to
CM
The LT1498/LT1499 are fully functional for an input and
output signal range from the negative supply to the posi-
tive supply. Figure 1 shows a simplified schematic of the
amplifier. The input stage consists of two differential am-
plifiers, a PNP stage (Q1/Q2) and an NPN stage (Q3/Q4)
which are active over different ranges of input common
mode voltage. A complementary common emitter output
stage(Q14/Q15)isemployedallowingtheoutputtoswing
from rail-to-rail. The devices are fabricated on Linear
Technology’s proprietary complementary bipolar process
to ensure very similar DC and AC characteristics for the
output devices (Q14/Q15).
approximately 1.3V below the positive supply. As V
CM
moves further toward the positive supply, the transistor
(Q5) will steer the tail current, I , to the current mirror
1
(Q6/Q7) activating the NPN differential pair, and the PNP
differential pair becomes inactive for the rest of the input
common mode range up to the positive supply.
The output is configured with a pair of complementary
common emitter stages that enables the output to swing
from rail to rail. Capacitors (C1 and C2) form local
feedback loops that lower the output impedance at high
frequencies.
14989fe
13
LT1498/LT1499
APPLICATIONS INFORMATION
+
V
R3
R4
R5
Q15
Q12
C2
I
1
Q11
Q13
D1
+IN
R6
V
Q5
BIAS
D2
D5
D6
–
C
C
V
OUT
–IN
R7
Q4 Q3
Q1 Q2
D3
Q10
BUFFER
AND
OUTPUT BIAS
Q9
R1
Q8
D4
C1
Q7
Q6
Q14
–
R2
V
14989 F01
Figure 1. LT1498 Simplified Schematic Diagram
Input Offset Voltage
voltage exceeds either power supply by approximately
700mV, D1/D2 or D3/D4 will turn on, forcing the output
to the proper polarity. For the phase reversal protection to
work properly, the input current must be less than 5mA.
If the amplifier is to be severely overdriven, an external
resistor should be used to limit the overdrive current.
The offset voltage changes depending upon which input
stage is active. The input offsets are random, but are
trimmed to less than 475μV. To maintain the precision
characteristics of the amplifier, the change of V over the
OS
entire input common mode range (CMRR) is guaranteed
to be less than 425μV on a single 5V supply.
Furthermore, the LT1498/LT1499’s input stages are pro-
tected by a pair of back-to-back diodes, D5/D6. When a
differential voltage of more than 0.7V is applied to the
inputs, these diodes will turn on, preventing the Zener
breakdown of the input transistors. The current in D5/D6
should be limited to less than 10mA. Internal resistors R6
and R7 (700Ω total) limit the input current for differential
input signals of 7V or less. For larger input levels, a re-
sistor in series with either or both inputs should be used
to limit the current. Worst-case differential input voltage
usually occurs when the output is shorted to ground. In
addition, the amplifier is protected against ESD strikes up
to 3kV on all pins.
Input Bias Current
The input bias current polarity also depends on the input
common mode voltage, as described in the previous sec-
tion. WhenthePNPdifferentialpairisactive, theinputbias
currents flow out of the input pins; they flow in opposite
directionwhentheNPNinputstageisactive.Theoffseterror
due to input bias current can be minimized by equalizing
the noninverting and inverting input source impedances.
This will reduce the error since the input offset currents
are much less than the input bias currents.
Overdrive Protection
Capacitive Load
To prevent the output from reversing polarity when the
input voltage exceeds the power supplies, two pair of
crossing diodes D1 to D4 are employed. When the input
The LT1498/LT1499 are designed for ease of use. The
amplifier can drive a capacitive load of more than 10nF
14989fe
14
LT1498/LT1499
APPLICATIONS INFORMATION
without oscillation at unity gain. When driving a heavy
capacitive load, the bandwidth is reduced to maintain
stability. Figures 2a and 2b illustrate the stability of the
device for small-signal and large-signal conditions with
capacitive loads. Both the small-signal and large-signal
transient response with a 10nF capacitive load are well
behaved.
C
= 0pF
L
C
= 500pF
L
C
L
= 10nF
Feedback Components
14989 F02a
V
A
= 5V
= 1
S
V
To minimize the loading effect of feedback, it is possible
to use the high value feedback resistors to set the gain.
However, caremustbetakentoinsurethatthepoleformed
by the feedback resistors and the total input capacitance
at the inverting input does not degrade the stability of the
amplifier. For instance, the LT1498/LT1499 in a noninvert-
ing gain of 2, set with two 30k resistors, will probably
oscillate with 10pF total input capacitance (5pF input
capacitance + 5pF board capacitance). The amplifier has
a 2.5MHz crossing frequency and a 60° phase margin at
6dB of gain. The feedback resistors and the total input
capacitance create a pole at 1.06MHz that induces 67° of
phase shift at 2.5MHz! The solution is simple, either lower
the value of the resistors or add a feedback capacitor of
10pF of more.
Figure 2a. LT1498 Small-Signal Response
C
= 0pF
L
C
= 500pF
L
C
L
= 10nF
14989 F02b
V
A
= 5V
= 1
S
V
Figure 2b. LT1498 Large-Signal Response
TYPICAL APPLICATIONS
1A Voltage Controlled Current Source
0.5Ω
1A Voltage Controlled Current Sink
+
V
+
V
+
V
1k
I
R
L
OUT
1k
V
+
IN
100Ω
500pF
1/2 LT1498
Si9410DY
–
–
100Ω
500pF
1/2 LT1498
Si9430DY
1k
V
+
1k
IN
I
+
R
L
OUT
V
– V
IN
I
=
OUT
0.5Ω
0.5Ω
V
0.5Ω
IN
I
=
OUT
14989 TA03
t < 1μs
r
14989 TA04
t < 1μs
r
14989fe
15
LT1498/LT1499
TYPICAL APPLICATION
Input Bias Current Cancellation
R
R
F
G
SIGNAL
AMP
–
V
OUT
1/2 LT1498
+
V
IN
1M
+
–
CANCELLATION
AMP
1/2 LT1498
22pF
1M
14989 TA05
INPUT BIAS CURRENT LESS THAN 50nA
+
FOR 500mV ≤ V ≤ (V – 500mV)
IN
PACKAGE DESCRIPTION
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.400*
(10.160)
MAX
8
7
6
5
4
.255 .015*
(6.477 0.381)
1
2
3
.130 .005
.300 – .325
.045 – .065
(3.302 0.127)
(1.143 – 1.651)
(7.620 – 8.255)
.065
(1.651)
TYP
.008 – .015
(0.203 – 0.381)
.120
(3.048)
MIN
.020
(0.508)
MIN
+.035
–.015
.325
.018 .003
(0.457 0.076)
.100
(2.54)
BSC
+0.889
8.255
(
)
N8 1002
–0.381
NOTE:
INCHES
1. DIMENSIONS ARE
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
14989fe
16
LT1498/LT1499
PACKAGE DESCRIPTION
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
14989fe
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 representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
17
LT1498/LT1499
PACKAGE DESCRIPTION
S Package
14-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.337 – .344
.045 .005
(8.560 – 8.738)
.050 BSC
NOTE 3
13
12
11
10
8
14
N
9
N
.245
MIN
.160 .005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
1
2
3
N/2
N/2
7
.030 .005
TYP
RECOMMENDED SOLDER PAD LAYOUT
1
2
3
4
5
6
.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
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
.016 – .050
(0.406 – 1.270)
S14 0502
NOTE:
INCHES
(MILLIMETERS)
2. DRAWING NOT TO SCALE
1. DIMENSIONS IN
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
14989fe
18
LT1498/LT1499
REVISION HISTORY (Revision history begins at Rev E)
REV
DATE
DESCRIPTION
PAGE NUMBER
E
10/09 Edit in Absolute Maximum Ratings
2
14989fe
19
LT1498/LT1499
TYPICAL APPLICATION
Bidirectional Current Sensor
A1 forces a voltage equal to (I )(R
) across R . This
L
SENSE A
voltage is then amplified at the Charge Out by the ratio of
A bidirectional current sensor for battery-powered sys-
tems is shown in Figure 3. Two outputs are provided: one
proportional to charge current, the other proportional
to discharge current. The circuit takes advantage of the
LT1498’s rail-to-rail input range and its output phase
reversal protection. During the charge cycle, the op amp
R over R . In this mode, the output of A2 remains high,
B
A
keeping Q2 off and the Discharge Out low, even though
the (+) input of A2 exceeds the positive power supply.
During the discharge cycle, A2 and Q2 are active and the
operation is similar to the charge cycle.
I
L
R
SENSE
CHARGE
0.1Ω
V
V
BATTERY
BATTERY
DISCHARGE
R
R
R
A
A
A
+
–
+
A2
A1
1/2 LT1498
1/2 LT1498
R
A
–
Q2
MTP23P06
Q1
MTP23P06
R
R
B
A
DISCHARGE CHARGE
V
= I
R
SENSE
O
L
(
)
OUT
OUT
FOR R = 1k, R = 10k
A
B
R
R
B
B
V
O
L
= 1V/A
I
14989 F03
Figure 3. Bidirectional Current Sensor
RELATED PARTS
PART NUMBER DESCRIPTION
COMMENTS
LTC®1152
Rail-to-Rail Input and Output, Zero-Drift Op Amp
High DC Accuracy, 10μV V
, 100nV/°C Drift, 1MHz GBW, 1V/μs
OS(MAX)
Slew Rate, Max Supply Current 2.2mA
LT1211/LT1212 Dual/Quad 14MHz, 7V/μs, Single Supply Precision Op Amps
LT1213/LT1214 Dual/Quad 28MHz, 12V/μs, Single Supply Precision Op Amps
LT1215/LT1216 Dual/Quad 23MHz, 50V/μs, Single Supply Precision Op Amps
LT1366/LT1367 Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps
Input Common Mode Includes Ground, 275μV V
Drift, Max Supply Current 1.8mA per Op Amp
, 6μV/°C Max
, 6μV/°C Max
, Max Supply
OS(MAX)
OS(MAX)
OS(MAX)
Input Common Mode Includes Ground, 275μV V
Drift, Max Supply Current 3.5mA per Op Amp
Input Common Mode Includes Ground, 450μV V
Current 6.6mA per Op Amp
475μV V
, 400kHz GBW, 0.13V/μs Slew Rate, Max Supply
OS(MAX)
Current 520μA per Op Amp
LT1490/LT1491 Dual/Quad Micropower, Rail-to-Rail Input and Output Op Amps Max Supply Current 50μA per Op Amp, 200kHz GBW, 0.07V/μs Slew
–
+
Rate, Operates with Inputs 44V Above V Independent of V
LT1884/LT1885 Dual/Quad, Rail-to-Rail Output Picoamp Input Precision Op Amps I = 650μA, V < 50μV, I < 400pA
CC
OS
B
14989fe
LT 1009 REV E • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
20
●
●
© LINEAR TECHNOLOGY CORPORATION 2009
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
相关型号：
LT1499IS#PBF
LT1499 - 10MHz, 6V/µs, Quad Rail-to-Rail Input and Output Precision C-Load Op Amps; Package: SO; Pins: 14; Temperature Range: -40°C to 85°C
Linear
LT1499IS#TRPBF
LT1499 - 10MHz, 6V/µs, Quad Rail-to-Rail Input and Output Precision C-Load Op Amps; Package: SO; Pins: 14; Temperature Range: -40°C to 85°C
Linear
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