Datasheet

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LT1057/LT1058

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The LT

1057 is a matched JFET input dual op amp in the

industry standard 8-pin configuration, featuring a

combination of outstanding high speed and precision

specifications. It replaces all the popular bipolar and JFET

input dual op amps. In particular, the LT1057 upgrades the

performance of systems using the LF412A and OP-215

JFET input duals.

The LT1058 is the lowest offset quad JFET input

operational amplifier in the standard 14-pin configuration.

It offers significant accuracy improvement over presently

available JFET input quad operational amplifiers. The

LT1058 can replace four single precision JFET input op

amps, while saving board space, power dissipation and

cost.

Both the LT1057 and LT1058 are available in the plastic

PDIP package and the surface mount SO package.

■

Precision, High Speed Instrumentation

■

Fast, Precision Sample-and-Hold

■

Logarithmic Amplifiers

■

D/A Output Amplifiers

■

Photodiode Amplifiers

■

Voltage-to-Frequency Converters

■

Frequency-to-Voltage Converters

Current Output, High Speed, High Input Impedance

Instrumentation Amplifier

Dual and Quad, JFET Input

Precision High Speed Op Amps

Distribution of Offset Voltage

(All Packages, LT1057 and LT1058)

–

6.8k7.5k

7.5k

1/4

LT1058

1/4

LT1058

1/4

LT1058

1/4

LT1058

OUT

2(V1 – V2)

*GAIN ADJUST

**COMMON MODE REJECTION ADJUST

BANDWIDTH ≈ 2MHz

4.7k

500Ω*

1k**

4.7k 7.5k

9.1k

LT1057/1058 • TA01

INPUT OFFSET VOLTAGE (mV)

–1.0

PERCENT OF UNITS

0.6

LT1057/1058 • TA02

–0.6

–0.2 0

0.2

1.0

= ±15V

= 25°C

LT1057: 610 OP AMPS

LT1058: 520 OP AMPS

1130 OP AMPS

TESTED

FEATURES

APPLICATIO S

DESCRIPTIO

TYPICAL APPLICATIO

■

14V/µs Slew Rate: 10V/µs Min

■

5MHz Gain-Bandwidth Product

■

Fast Settling Time: 1.3µs to 0.02%

■

150µV Offset Voltage (LT1057): 450µV Max

■

180µV Offset Voltage (LT1058): 600µV Max

■

2µV/°C V

Drift: 7µV/°C Max

■

50pA Bias Current at 70°C

■

Low Voltage Noise:

13nV/√Hz at 1kHz

26nV/√Hz at 10Hz

, LTC and LT are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

Summary of content (16 pages)

PAGE 1
LT1057/LT1058 Dual and Quad, JFET Input Precision High Speed Op Amps U FEATURES DESCRIPTIO ■ The LT ®1057 is a matched JFET input dual op amp in the industry standard 8-pin configuration, featuring a combination of outstanding high speed and precision specifications. It replaces all the popular bipolar and JFET input dual op amps. In particular, the LT1057 upgrades the performance of systems using the LF412A and OP-215 JFET input duals.
PAGE 2
LT1057/LT1058 W W W AXI U U ABSOLUTE RATI GS (Note 1) Supply Voltage ...................................................... ± 20V Differential Input Voltage ....................................... ± 40V Input Voltage ......................................................... ± 20V Output Short-Circuit Duration .......................... Indefinite Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec)..................
PAGE 3
LT1057/LT1058 ELECTRICAL CHARACTERISTICS VS = ± 15V, TA = 25°C, VCM = 0V unless otherwise noted.
PAGE 4
LT1057/LT1058 ELECTRICAL CHARACTERISTICS (LT1057/LT1058 SW Package Only), VS = ± 15V, TA = 25°C, VCM = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS in Input Noise Current Density fO = 10Hz, 1kHz AVOL Large-Signal Voltage Gain VO = ±10V MIN RL = 2k RL = 1k Input Voltage Range TYP MAX UNITS 1.8 fA/√Hz 100 50 300 220 V/mV ±10.5 14.3 – 11.
PAGE 5
LT1057/LT1058 ELECTRICAL CHARACTERISTICS (LT1057/LT1058 SW Package Only.) The ● denotes specifications which apply over the temperature range of VS = ± 15V, VCM = 0V, 0°C ≤ TA ≤ 70°C (LT1057SW, LT1058SW) or –40°C ≤ TA ≤ 85°C (LT1057ISW, LT1058ISW), unless otherwise noted. SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage LT1057 LT1058S LT1058IS MIN Average Temperature Coefficient of Input Offset Voltage TYP MAX UNITS ● ● ● 0.5 0.6 0.7 2.5 3.0 4.
PAGE 6
LT1057/LT1058 U W TYPICAL PERFOR A CE CHARACTERISTICS VS = ±15V VCM = 0V WARMED UP 300 100 BIAS CURRENT 30 OFFSET CURRENT 10 25 75 100 50 AMBIENT TEMPERATURE (°C) 0 125 VS = ±15V 1.4 140 1.2 120 1.0 100 TA = 125°C 0.8 60 0.4 40 20 0.
PAGE 7
LT1057/LT1058 U W TYPICAL PERFOR A CE CHARACTERISTICS Slew Rate, Gain-Bandwidth Product vs Temperature 30 Undistorted Output Swing vs Frequency 10 VS = ±15V SLEW RATE (V/µs) 5V/DIV AV = +1 CL = 100pF SLEW FALL 20 6 GBW 4 SLEW RISE 10 2 0.
PAGE 8
LT1057/LT1058 U W TYPICAL PERFOR A CE CHARACTERISTICS Common Mode Rejection Ratio vs Frequency 15 VS = ±15V TA = 25°C 80 CMRR (dB) 120 VS = ±10V TO ±17V FOR PSRR VS = ±15V, VCM = ±10.
PAGE 9
LT1057/LT1058 U W U U APPLICATIO S I FOR ATIO Settling time is measured in a test circuit which can be found in the LT1055/LT1056 data sheet and in Application Note 10. Achieving Picoampere/Microvolt Performance In order to realize the picoampere/microvolt level accuracy of the LT1057/LT1058, proper care must be exercised. For example, leakage currents in circuitry external to the op amp can significantly degrade performance. High quality insulation should be used (e.g.
PAGE 10
LT1057/LT1058 U TYPICAL APPLICATIO S Low Noise, Wideband, Gain = 100 Amplifier with High Input Impedance 4.3k 470Ω – 2.4k 1/4 LT1058 7.5k 500Ω + 4.3k 2.4k – 470Ω 1/4 LT1058 – OUTPUT + 1/4 LT1058 + INPUT 4.3k 470Ω 2.4k –3dB BANDWIDTH = 350kHZ GAIN-BANDWIDTH PRODUCT = 35MHz WIDEBAND NOISE = 13nV/√Hz = 7.5nV/√Hz REFERRED TO INPUT √3 RMS NOISE DC TO FULL BANDWIDTH = 7µV – 1/4 LT1058 + LT1057/1058 • A01 Wideband, High Input Impedance, Gain = 1000 Amplifier 1k 4.
PAGE 11
LT1057/LT1058 U TYPICAL APPLICATIO S Fast, Precision Bridge Amplifier 330pF – 10k 1/2 LT1057 + 10k 1k 330pF – RLOAD 1/2 LT1057 LT1010 LT1010 + INPUT SLEW RATE = 14V/µs OUTPUT CURRENT TO LOAD = 150mA LOAD CAPACITANCE: UP TO 1µF LT1057/1058 • A04 Analog Divider 80.6k* 20k 1µF LTC1043 7 –5V 6 LT1004 1.2V 12 5V LTC1043 1k 8 + B INPUT 5 1µF – 1/2 LT1057 OUTPUT = A B + 2 – 5V 0.
PAGE 12
LT1057/LT1058 U TYPICAL APPLICATIO S Bipolar Input (AC) V/F Converter LTC1043 1k –5V 6 LT1004 2.5V 2 5 0.1µF 16 18 1M* 15 3 1M* 0.01 POLYSTYRENE 1/4 LT1058 1µF INPUT ±1V + – 2N3906 + 5V 36.5k* – 10k DATA OUTPUT 0kHz TO 1kHz 1/4 LT1058 – 1M* 1/4 LT1058 1M* 10k + 22k 150pF 10k –5V 0.1µF – 1/4 LT1058 *1% FILM MATCH 1M RESISTORS TO 0.05% SIGN BIT + LT1057/1058 • A06 12-Bit A/D Converter 10k 0.
PAGE 13
LT1057/LT1058 U TYPICAL APPLICATIO S Instrumentation Amplifier with Shield Driver 3 2 + 10k 1k 1 1/4 LT1058 – RF 9.1k GUARD RG 1k + + 1/4 LT1058 8 INPUT – – 15V 5 10 9 1/4 LT1058 6 RG 1k 4 + – 7 OUTPUT 11 –15V GUARD 13 12 RF 9.
PAGE 14
LT1057/LT1058 U PACKAGE DESCRIPTIO H Package 8-Lead TO-5 Metal Can (.200 Inch PCD) (Reference LTC DWG # 05-08-1320) .335 – .370 (8.509 – 9.398) DIA .305 – .335 (7.747 – 8.509) .027 – .045 (0.686 – 1.143) PIN 1 45°TYP .040 (1.016) MAX .028 – .034 (0.711 – 0.864) .200 (5.080) TYP .050 (1.270) MAX SEATING PLANE .165 – .185 (4.191 – 4.699) GAUGE PLANE .010 – .045* (0.254 – 1.143) .110 – .160 (2.794 – 4.064) INSULATING STANDOFF REFERENCE PLANE .500 – .750 (12.700 – 19.050) .016 – .021** (0.406 – 0.
PAGE 15
LT1057/LT1058 U PACKAGE DESCRIPTIO N8 Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) .300 – .325 (7.620 – 8.255) 8 .008 – .015 (0.203 – 0.381) ( +.035 .325 –.015 +0.889 8.255 –0.381 7 6 5 .065 (1.651) TYP .255 ± .015* (6.477 ± 0.381) ) 1 2 .130 ± .005 (3.302 ± 0.127) .045 – .065 (1.143 – 1.651) .400* (10.160) MAX .100 (2.54) BSC 4 3 .120 (3.048) .020 MIN (0.508) MIN .018 ± .003 NOTE: 1. DIMENSIONS ARE (0.457 ± 0.
PAGE 16
LT1057/LT1058 U PACKAGE DESCRIPTIO SW Package 16-Lead Plastic Small Outline (Wide .300 Inch) (Reference LTC DWG # 05-08-1620) .050 BSC .045 ±.005 .030 ±.005 TYP .398 – .413 (10.109 – 10.490) NOTE 4 16 N 15 14 13 12 11 10 9 N .325 ±.005 .420 MIN .394 – .419 (10.007 – 10.643) NOTE 3 1 2 3 N/2 N/2 RECOMMENDED SOLDER PAD LAYOUT 1 .005 (0.127) RAD MIN .009 – .013 (0.229 – 0.330) .291 – .299 (7.391 – 7.595) NOTE 4 .010 – .029 × 45° (0.254 – 0.737) 2 3 4 5 .093 – .104 (2.362 – 2.