LT1457CN8#PBF [Linear]
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| 型号： | LT1457CN8#PBF |
| 厂家： | 
Linear |
| 描述： | 暂无描述 运算放大器 放大器电路 光电二极管 |
| 文件： | 总8页 (文件大小：240K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1457
Dual, Precision
JFET Input Op Amp
U
FEATURES
DESCRIPTION
■
Handles 10,000pF Capacitive Load
450µV Max Offset Voltage
1200µV Max Offset Voltage in S8 Package
50pA Bias Current at 70°C
13nV/√Hz Voltage Noise
4V/µs Slew Rate
4µV/°C Drift
The LT1457 is a dual, JFET input op amp optimized for
handling large capacitive loads in combination with preci-
sion performance.
■
■
■
Precision specifications include 220µV offset voltage in
plastic and surface mount packages. At 70°C input bias
current is 50pA, input offset current is 20pA. Channel
separation is 130dB.
■
■
■
■
130dB Channel Separation
Other dual JFET input op amps from Linear Technology
include the LT1057, which is three times faster than the
LT1457butattheexpenseofsignificantlylowercapacitive
load handling capability; and the LT1113 with 4.5nV/√Hz
voltage noise.
U
APPLICATIONS
■
Sample-and-Hold (Drives Large Hold Capacitors)
A/D and D/A Converters
Photodiode Amplifiers
■
■
■
Voltage-to-Frequency Converters
U W
TYPICAL PERFORMANCE CHARACTERISTICS
Capacitive Load Handling
Input Offset Voltage Distribution
S8 Package
100
21
18
15
12
9
400 DUALS
V
T
= ±15V
= 25°C
= +1
V
T
= ±15V
= 25°C
S
A
V
S
A
(800 OP AMPS)
TESTED FROM
3 RUNS
A
80
60
40
20
0
6
3
0
0.1
1
10
100
–1.0–0.8 –0.6–0.4 –0.2
0
0.2 0.4 0.6 0.8 1.0
CAPACITIVE LOAD (nF)
INPUT OFFSET VOLTAGE (mV)
LT11457• TA01
LT1457 • TA02
1
LT1457
W W U W
U
W U
ABSOLUTE MAXIMUM RATINGS
PACKAGE/ORDER INFORMATION
Supply Voltage ...................................................... ±20V
Differential Input Voltage ....................................... ±40V
Input Voltage .......................... Equal to Supply Voltages
Output Short-Circuit Duration.......................... Indefinite
Operating Temperature Range ................ –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
TOP VIEW
ORDER PART
NUMBER
+
OUT A
–IN A
+IN A
1
2
3
4
8
7
6
5
V
OUT B
A
LT1457ACN8
LT1457CN8
–IN B
+IN B
B
–
V
N8 PACKAGE
8-LEAD PLASTIC DIP
TJMAX = 115°C, θJA = 130°C/ W
TOP VIEW
LT1457S8
+IN A
1
2
3
4
8
7
6
5
–IN A
–
A
B
V
OUT A
+
+IN B
–IN B
V
OUT B
S8 PART MARKING
1457
S8 PACKAGE
8-LEAD PLASTIC SOIC
NOTE: THIS PIN CONFIGURATION DIFFERS FROM
THE 8-LEAD DIP PIN LOCATIONS. INSTEAD, IT
FOLLOWS THE INDUSTRY STANDARD LT1013DS8
SO PACKAGE CONFIGURATION.
TJMAX = 130°C, θJA = 190°C/ W
Consult factory for Industrial and Military grade parts.
VS = ±15V, TA = 25°C,VCM = 0V unless otherwise noted. (Note 1)
ELECTRICAL CHARACTERISTICS
LT1457AC
TYP
LT1457C/LT1457S8
SYMBOL PARAMETER
CONDITIONS
MIN
MAX
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT1457AC/C
LT1457S8
150
450
200
220
800
1200
µV
µV
OS
I
I
Input Offset Current
Fully Warmed Up
Fully Warmed Up
3
40
4
50
pA
pA
OS
Input Bias Current
±5
±50
±7
±75
B
12
12
Input Resistance-Differential
10
10
10
10
10
10
Ω
Ω
Ω
12
12
-Common-Mode
V
V
= –11V to 8V
= 8V to 11V
CM
CM
11
11
Input Capacitance
4
4
pF
e
e
Input Noise Voltage
0.1Hz to 10Hz
2.0
2.1
µV
P–P
n
n
Input Noise Voltage Density
f
f
= 10Hz
= 1kHz (Note 2)
26
13
28
14
nV/√Hz
nV/√Hz
O
O
22
4
24
6
i
Input Noise Current Density
Large-Signal Voltage Gain
f
= 10Hz, 1kHz (Note 3)
1.5
1.8
fA/√Hz
n
O
A
V
V
= ±10V, R = 2k
150
120
350
250
100
80
300
220
V/mV
V/mV
VOL
O
O
L
= ±10V, R = 1k
L
Input Voltage Range
±10.5 14.3
±10.5
14.3
–11.5
V
V
–11.5
CMRR
PSRR
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Output Voltage Swing
Slew Rate
V
= ±10.5V
86
88
±12
2
100
103
±13
4
82
86
±12
2
98
102
±13
4
dB
dB
CM
V = ±4.5V to ±18V
S
V
R = 2k
V
OUT
L
SR
V/µs
2
LT1457
VS = ±15V, TA = 25°C,VCM = 0V unless otherwise noted. (Note 1)
ELECTRICAL CHARACTERISTICS
LT1457AC
TYP
LT1457C/LT1457S8
SYMBOL PARAMETER
GBW Gain-Bandwidth Product
CONDITIONS
MIN
MAX
MIN
TYP
MAX
UNITS
MHz
mA
(Note 5)
1.0
1.7
1.8
132
1.0
1.7
I
Supply Current Per Amplifier
Channel Separation
3.0
1.8
3.0
S
DC to 5kHz, V = ±10V
130
dB
IN
VS = ±15V, VCM = 0V, 0°C ≤ TA ≤ 70°C, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
LT1457AC
TYP
LT1457C/LT1457S8
SYMBOL PARAMETER
CONDITIONS
MIN
MAX
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT1457AC/C
LT1457S8
●
●
250
900
330
400
1500
1900
µV
µV
OS
Average Temperature Coefficient of
Input Offset Voltage (Note 4)
●
3
10
4
16
µV/°C
I
I
A
Input Offset Current
Input Bias Current
Large-Signal Voltage Gain
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Output Voltage Swing
Warmed Up, T = 70°C
18
±50
220
98
150
±250
20
±60
200
96
100
±12.8
250
±350
pA
pA
V/mV
dB
dB
V
OS
A
Warmed Up, T = 70°C
B
A
V = ±10V, R = 2k
●
●
●
●
●
70
85
87
50
80
84
VOL
O
L
CMRR
PSRR
V
V
= ±10.4V
CM
V = ±4.5V to ±18V
102
S
R = 2k
L
±12 ±12.8
±12
OUT
I
Supply Current Per Amplifier
3.2
3.2
mA
mA
S
T = 70°C
A
1.7
1.7
VS = ±15V, VCM = 0V, –40°C ≤ TA ≤ 85°C, unless otherwise noted. (Note 6)
ELECTRICAL CHARACTERISTICS
LT1457AC
TYP
LT1457C/LT1457S8
SYMBOL PARAMETER
CONDITIONS
MIN
MAX
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
LT1457AC/C
LT1457S8
●
●
350
1100
400
500
1800
2300
µV
µV
OS
Average Temperature Coefficient of
Input Offset Voltage
●
3
10
4
16
µV/°C
I
I
A
Input Offset Current
Input Bias Current
Large-Signal Voltage Gain
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Output Voltage Swing
Warmed Up, T = 85°C
0.1
±0.2
120
97
0.5
±0.7
0.1
±0.2
110
95
98
±12.6
0.6
±0.9
nA
nA
V/mV
dB
dB
V
OS
A
Warmed Up, T = 85°C
B
A
V = ±10V, R = 2k
●
●
●
●
40
84
86
30
80
83
VOL
O
L
CMRR
PSRR
V
V
= ±10.4V
CM
V = ±5V to ±17V
100
±12 ±12.7
S
R = 2k
L
±12
OUT
I
Supply Current Per Amplifier
T = – 40°C
T = 85°C
A
3.8
3.8
mA
mA
S
A
1.7
1.7
Note 4: This parameter is not 100% tested.
The
● denotes the specifications which apply over the full operating
temperature range.
Note 5: Gain-Bandwidth product is not tested. It is guaranteed by design
and by inference from the slew rate measurement.
Note 1: Typical parameters are defined as the 60% yield of distributions of
individual amplifiers; i.e., out of 100 LT1457s (200 op amps) typically 120
will be better than the indicated specification.
Note 6: The LT1457 is not tested and not quality-assurance-sampled at
–40°C and at 85°C. These specifications are guaranteed by design,
correlation, and/or inference from 0°C, 25°C, and 70°C tests.
Note 2: This parameter is tested on a sample basis only.
1/2
Note 3: Current noise is calculated from the formula: i = (2qI ) , where
n
b
–19
q = 1.6 x 10
coulomb. The noise of source resistors up to 1GΩ
swamps the contribution of current noise.
3
LT1457
TYPICAL PERFORMANCE CHARACTERISTICS
W
U
Input Bias and Offset Current vs
Temperature
Input Bias Current Over
the Common-Mode Range
Warm-Up Drift
1000
300
100
30
160
140
120
100
80
150
120
90
60
30
0
V
V
= ±15V
V
S
= ±15V
V
= ±15V
= 25°C
S
S
A
= 0V
T
CM
WARMED UP
S8 PACKAGE
T
= 70°C
A
BIAS CURRENT
60
40
N8 PACKAGE
20
10
OFFSET CURRENT
75
0
T
= 25°C
A
3
–20
0
25
50
100
–15
–10
–5
0
5
10
15
0
1
2
3
4
5
AMBIENT TEMPERATURE (°C)
COMMON-MODE INPUT VOLTAGE (V)
TIME AFTER POWER ON (MINUTES)
LT1457 • TPC01
LT1457 • TPC02
LT1457 • TPC03
Input Offset Voltage Distribution
N8 Package
Long Term Drift of
Voltage Gain vs Temperature
Representative Units
1000
50
40
24
21
18
15
12
9
V
T
= ±15V
= 25°C
900 DUALS
S
A
V
V
= ±15V
= ±10V
V
T
= ±15V
S
A
S
O
(1800 OP AMPS)
TESTED FROM 3
RUNS
= 25°C
R
R
= 2k
= 1k
L
L
30
300
100
20
10
0
–10
–20
–30
–40
–50
6
30
10
3
0
0
0.2
–0.8 –0.6 –0.4 –0.2
0.4 0.6 0.8
–50
–25
0
25
50
75
100
0
1
2
3
4
5
TEMPERATURE (°C)
TIME (MONTHS)
INPUT OFFSET VOLTAGE (mV)
LT1457 • TPC04
LT1457 • TPC05
LT1457 • TPC06
Voltage Noise vs Frequency
0.1Hz to 10Hz Noise
Channel Separation vs Frequency
100
70
160
140
120
100
80
V
T
= ±15V
= 25°C
V
T
= ±15V
= 25°C
S
A
S
A
LIMITED BY
THERMAL
50
R
= 10Ω
S
INTERACTION AT
DC = 132dB
30
20
LIMITED BY PIN TO
PIN CAPACITANCE
V
= ±15V
S
A
T
= 25°C
V
R
= 20V TO 5kHz
R
= 1k
IN
P-P
S
= 2k
L
1/f CORNER = 28Hz
10 30 100 300 1k
10
60
3
3k 10k
0
2
4
6
8
10
1
10
100
1k
10k 100k
1M
FREQUENCY (Hz)
TIME (SECONDS)
FREQUENCY (Hz)
LT1457 • TPC07
LT1457 • TPC08
LT1457 • TPC09
4
LT1457
W
U
TYPICAL PERFORMANCE CHARACTERISTICS
Common-Mode Rejection Ratio
vs Frequency
Common-Mode Range vs
Temperature
Common-Mode and Power Supply
Rejections vs Temperature
120
100
80
60
40
20
0
15
14
120
110
100
90
V
= ±15V
= 25°C
V
V
= ±5V TO ±17V FOR PSRR
S
A
S
S
T
= ±15V, V = ±10.5V FOR CMRR
CM
13
12
11
PSRR
CMRR
±10
–11
–12
–13
–14
–15
V
= ±15V
–25
S
10
100
1k
10k 100k
1M
10M
–50
0
25
50
75
100
–50
–25
0
25
50
75
100
FREQUENCY (Hz)
TEMPERATURE (°C)
TEMPERATURE (°C)
LT1457• TPC10
LT1457 • TPC11
LT1457 • TPC12
Slew Rate, Gain-Bandwidth
Product vs Temperature
Short-Circuit Current vs Time
(One Output Shorted to Ground)
Supply Current vs Temperature
10
8
3
2
1
0
50
40
V
= ±15V
2.5
2.0
1.5
1.0
S
T
= –40°C
A
30
20
SLEW FALL
GBW
V
= ±15V
S
10
T
T
= 25°C
= 25°C
T
T
= 85°C
= 85°C
A
A
A
A
6
0
V
= ±5V
S
–10
–20
–30
–40
–50
4
SLEW RISE
75
T
= –40°C
A
2
V
S
= ±15V
–50
–25
0
25
50
100
–50
–25
0
25
50
75
100
0
1
2
3
TEMPERATURE (°C)
TEMPERATURE (°C)
TIME FROM OUTPUT SHORT TO GROUND (MINUTES)
LT1457 • TPC18
LT1457 • TPC14
LT1457 • TPC15
Undistorted Output Swing vs
Frequency
Power Supply Rejection Ratio
vs Frequency
Gain, Phase vs Frequency
25
20
15
10
5
30
24
18
12
6
140
120
100
80
PHASE MARGIN = 80°, C = 10pF
L
V
= ±15V
= 25°C
T
= 25°C
S
A
A
PHASE MARGIN = 51°, C = 1000pF
L
100
80
60
40
20
0
T
C
= 10pF
L
POSITIVE
SUPPLY
PHASE
= 1000pF
C
L
60
NEGATIVE
SUPPLY
GAIN
0
40
–5
–10
–15
C
= 1000pF
L
V
= ±15V
= 25°C
S
A
20
–20
T
C
= 10pF
L
0
0
0.1
1.0
FREQUENCY (MHz)
10
10k
100k
1M
10M
10
100
1k
10k 100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
LT1457 • TPC16
LT11457• TPC17
LT1457• TPC13
5
LT1457
TYPICAL PERFORMANCE CHARACTERISTICS
W
U
Large-Signal Response
AV = 1, CL = 100pF
Small-Signal Response
AV = 1, CL = 1000pF
Small-Signal Response
AV = 1, CL = 10,000pF
LT1457 TPC19
LT1457 TPC20
LT1457 TPC21
U
W U U
APPLICATIONS INFORMATION
Phase Reversal Protection
Most industry standard JFET input single, dual, and quad
op amps (e.g., LF156, LF351, LF353, LF411, LF412,
OP-15, OP-16, OP-215, andTL084)exhibitphasereversal
attheoutputwhenthenegativecommon-modelimitatthe
input is exceeded (i.e., below –12V with ±15V supplies).
Thephotosshowa±16Vsinewaveinput(A), theresponse
of an LF412A in the unity gain follower mode (B), and the
response of the LT1457 (C).
Thephasereversalofphoto(B)cancauselock-upinservo
systems. The LT1457 does not phase-reverse due to a
unique phase reversal protection circuit.
LT1457 AI01
LT1457 AI02
LT1457 AI03
(A) ±16V Sine Wave Input
(B) LF412A Output
(C) LT1457 Output
All Photos 5V/Div Vertical Scale, 50µs/Div Horizontal Scale
6
LT1457
U
W U U
APPLICATIONS INFORMATION
High Speed Operation
C
F
When the feedback around the op amp is resisitive (RF), a
pole will be created with RF, the source resistance and
capacitance (RS, CS), and the amplifier input capacitance
(CIN ≈ 4pF). In low closed loop gain configurations and
with RS and RF in the kilohm range, this pole can create
excess phase shift and even oscillation on high speed
amplifiers. Because the LT1457’s phase margin is very
high, this problem is minimal. However, a small capacitor
(CF)inparallelwithRF eliminatesthisproblem.WithRS(CS
+ CIN) = RFCF, the effect of the feedback pole is completely
removed.
R
F
–
+
C
OUTPUT
IN
C
S
R
S
LT1457 AI04
U
PACKAGE DESCRIPTION
Dimension in inches (millimeters) unless otherwise noted.
N8 Package
8-Lead Plastic DIP
0.130 ± 0.005
0.400
0.300 – 0.320
0.045 – 0.065
(3.302 ± 0.127)
(1.143 – 1.651)
(10.160)
MAX
(7.620 – 8.128)
8
1
7
6
5
4
0.065
(1.651)
TYP
0.009 – 0.015
(0.229 – 0.381)
0.250 ± 0.010
(6.350 ± 0.254)
0.125
(3.175)
MIN
0.020
(0.508)
MIN
+0.025
–0.015
0.045 ± 0.015
(1.143 ± 0.381)
0.325
+0.635
8.255
2
3
(
)
–0.381
0.100 ± 0.010
(2.540 ± 0.254)
0.018 ± 0.003
(0.457 ± 0.076)
N8 0392
S8 Package
8-Lead Plastic SOIC
0.189 – 0.197
(4.801 – 5.004)
0.010 – 0.020
(0.254 – 0.508)
7
5
8
6
× 45°
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0.008 – 0.010
(0.203 – 0.254)
0.228 – 0.244
(5.791 – 6.197)
0.150 – 0.157
(3.810 – 3.988)
0.016 – 0.050
0.406 – 1.270
0.050
(1.270)
BSC
0.014 – 0.019
(0.355 – 0.483)
0°– 8° TYP
SO8 0392
1
3
4
2
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.
7
LT1457
U.S. Area Sales Offices
SOUTHWEST REGION
Linear Technology Corporation
22141 Ventura Blvd.
SOUTHEAST REGION
Linear Technology Corporation
17060 Dallas Parkway
Suite 208
Dallas, TX 75248
Phone: (214) 733-3071
FAX: (214) 380-5138
NORTHEAST REGION
Linear Technology Corporation
One Oxford Valley
2300 E. Lincoln Hwy.,Suite 306
Langhorne, PA 19047
Phone: (215) 757-8578
FAX: (215) 757-5631
Suite 206
Woodland Hills, CA 91364
Phone: (818) 703-0835
FAX: (818) 703-0517
NORTHWEST REGION
Linear Technology Corporation
782 Sycamore Dr.
CENTRAL REGION
Linear Technology Corporation
Chesapeake Square
Linear Technology Corporation
266 Lowell St., Suite B-8
Wilmington, MA 01887
Milpitas, CA 95035
Phone: (408) 428-2050
FAX: (408) 432-6331
229 Mitchell Court, Suite A-25
Addison, IL 60101
Phone: (708) 620-6910
FAX: (708) 620-6977
Phone: (508) 658-3881
FAX: (508) 658-2701
International Sales Offices
KOREA
FRANCE
Linear Technology Korea Branch
Namsong Building, #505
Itaewon-Dong 260-199
Yongsan-Ku, Seoul
Korea
Linear Technology S.A.R.L.
Immeuble "Le Quartz"
58 Chemin de la Justice
92290 Chatenay Malabry
France
TAIWAN
Linear Technology Corporation
Rm. 801, No. 46, Sec. 2
Chung Shan N. Rd.
Taipei, Taiwan, R.O.C.
Phone: 886-2-521-7575
FAX: 886-2-562-2285
Phone: 82-2-792-1617
FAX: 82-2-792-1619
Phone: 33-1-41079555
FAX: 33-1-46314613
SINGAPORE
GERMANY
UNITED KINGDOM
Linear Technology Pte. Ltd.
101 Boon Keng Road
#02-15 Kallang Ind. Estates
Singapore 1233
Linear Techonolgy GmbH
Untere Hauptstr. 9
D-85386 Eching
Linear Technology (UK) Ltd.
The Coliseum, Riverside Way
Camberley, Surrey GU15 3YL
United Kingdom
Germany
Phone: 65-293-5322
FAX: 65-292-0398
Phone: 49-89-3197410
FAX: 49-89-3194821
Phone: 44-276-677676
FAX: 44-276-64851
JAPAN
Linear Technology KK
5F YZ Bldg.
4-4-12 Iidabashi, Chiyoda-Ku
Tokyo, 102 Japan
Phone: 81-3-3237-7891
FAX: 81-3-3237-8010
World Headquarters
Linear Technology Corporation
1630 McCarthy Blvd.
Milpitas, CA 95035-7487
Phone: (408) 432-1900
FAX: (408) 434-0507
0294
LT/GP 0594 10K • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
8
●
●
(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977
LINEAR TECHNOLOGY CORPORATION 1994
相关型号：
LT1457S8#PBF
LT1457 - Dual, Precision JFET Input Op Amp; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C
Linear
LT1460ACN8-10#TRPBF
IC 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 10 V, PDIP8, 0.300 INCH, LEAD FREE, PLASTIC, DIP-8, Voltage Reference
Linear
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