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LT1057/LT1058

10578fd

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Dual and Quad, JFET Input

Precision High Speed Op Amps

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.

Current Output, High Speed, High Input Impedance

Instrumentation Ampliﬁer

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

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

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

All other trademarks are the property of their respective owners.

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

10578 TA01

INPUT OFFSET VOLTAGE (mV)

–1.0

PERCENT OF UNITS

0.6

10578 TA01b

–0.6

–0.2 0

0.2

1.0

= ±15V

= 25°C

LT1057: 610 OP AMPS

LT1058: 520 OP AMPS

1130 OP AMPS

TESTED

Summary of content (16 pages)

PAGE 1
LT1057/LT1058 Dual and Quad, JFET Input Precision High Speed Op Amps FEATURES DESCRIPTION 14V/µs Slew Rate: 10V/µs Min n 5MHz Gain-Bandwidth Product n Fast Settling Time: 1.3µs to 0.
PAGE 2
LT1057/LT1058 ABSOLUTE MAXIMUM RATINGS (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 unless otherwise noted. (LT1057/LT1058 SW Package Only), VS = ±15V, TA = 25°C, VCM = 0V 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 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 l 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 l l l 0.5 0.6 0.7 2.5 3.0 4.
PAGE 6
LT1057/LT1058 TYPICAL PERFORMANCE CHARACTERISTICS 300 100 BIAS CURRENT 30 OFFSET CURRENT 10 3 25 75 100 50 AMBIENT TEMPERATURE (°C) 0 VS = ±15V 1.4 140 1.2 120 1.0 TA = 125°C 0.8 TA = 70°C 0.4 40 0.
PAGE 7
LT1057/LT1058 TYPICAL PERFORMANCE CHARACTERISTICS Slew Rate, Gain-Bandwidth Product vs Temperature 30 Undistorted Output Swing vs Frequency 10 VS = ±15V SLEW RATE (V/µs) 5V/DIV 6 GBW 4 SLEW RISE 10 2 10578 G10 0.
PAGE 8
LT1057/LT1058 TYPICAL PERFORMANCE CHARACTERISTICS Common Mode Rejection Ratio vs Frequency 60 40 20 120 14 COMMON MODE RANGE (V) 12 11 ±10 –11 –12 PSRR CMRR 100 –14 10 100 1k 10k 100k FREQUENCY (Hz) 1M VS = ±15V –15 50 0 –50 TEMPERATURE (°C) 10M 140 SUPPLY CURRENT PER AMPLIFIER (mA) 100 POSITIVE SUPPLY 80 NEGATIVE SUPPLY 40 20 10 100 100k 10k 1k FREQUENCY (Hz) 1M 10M 50 40 2 VS = ±15V VS = ±10V 1 VS = ±15V TA = –55°C 30 20 TA = 25°C 10 TA = 125°C 0 TA = 125°C –10 TA = 25°C –
PAGE 9
LT1057/LT1058 APPLICATIONS INFORMATION 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 TYPICAL APPLICATIONS Low Noise, Wideband, Gain = 100 Amplifier with High Input Impedance 4.3k 470Ω – 2.4k 1/4 LT1058 7.5k 500Ω + 4.3k 470Ω 2.4k – – + 1/4 LT1058 1/4 LT1058 OUTPUT + 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 + 10578 TA02 Wideband, High Input Impedance, Gain = 1000 Amplifier 1k 4.7k 1k 4.
PAGE 11
LT1057/LT1058 TYPICAL APPLICATIONS Fast, Precision Bridge Amplifier – 330pF 10k 1/2 LT1057 + 10k 1k – 330pF 1/2 LT1057 RLOAD LT1010 LT1010 + INPUT SLEW RATE = 14V/µs OUTPUT CURRENT TO LOAD = 150mA LOAD CAPACITANCE: UP TO 1µF 10578 TA05 Analog Divider 80.6k* 20k 1µF LTC1043 7 8 –5V 6 LT1004 1.2V 12 5V LTC1043 1k + B INPUT 5 1µF – 1/2 LT1057 + 2 0.
PAGE 12
LT1057/LT1058 TYPICAL APPLICATIONS Bipolar Input (AC) V/F Converter –5V LTC1043 1k 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 1M* 1/4 LT1058 1M* 10k + DATA OUTPUT 0kHz TO 1kHz 1/4 LT1058 22k 150pF 10k –5V 0.1µF – 1/4 LT1058 *1% FILM MATCH 1M RESISTORS TO 0.05% SIGN BIT + 10578 TA07 12-Bit A/D Converter 10k 0.001µF – CLOCK 1/4 LT1058 0.
PAGE 13
LT1057/LT1058 TYPICAL APPLICATIONS Instrumentation Amplifier with Shield Driver 3 + – RF 9.1k GUARD + INPUT + 10 – 9 1/4 LT1058 8 – 10k 1k 1 1/4 LT1058 2 RG 1k 15V 5 + 6 RG 1k 4 1/4 LT1058 – 7 OUTPUT 11 –15V GUARD 13 12 – 1/4 LT1058 14 RF 9.1k GAIN = 10(1+RF/RG) ≈ 100 IB = 5pA RIN = 1012Ω BW = 350kHz 10k 1k + 10578 TA09 100dB Range Logarithmic Photodiode Amplifier 6 Q4 4 10 5 2k 11 1M Q5 1M FULL-SCALE 750k* TRIM 12 IP 50k* 500pF – 1/2 LT1057 + – 0.
PAGE 14
LT1057/LT1058 PACKAGE DESCRIPTION H Package 8-Lead TO-5 Metal Can (.200 Inch PCD) (Reference LTC DWG # 05-08-1320) .027 – .045 (0.686 – 1.143) PIN 1 45°TYP .028 – .034 (0.711 – 0.864) .200 (5.080) TYP .335 – .370 (8.509 – 9.398) DIA .305 – .335 (7.747 – 8.509) .040 (1.016) MAX .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 PACKAGE DESCRIPTION N Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510 Rev I) .300 – .325 (7.620 – 8.255) 8 .008 – .015 (0.203 – 0.381) ( +.035 .325 –.015 8.255 +0.889 –0.381 7 6 .130 ±.005 (3.302 ±0.127) .045 – .065 (1.143 – 1.651) .400* (10.160) MAX 5 .065 (1.651) TYP .120 (3.048) .020 MIN (0.508) MIN .018 ±.003 .255 ±.015* (6.477 ±0.381) ) 1 2 3 .100 (2.54) BSC 4 (0.457 ±0.076) N8 REV I 0711 NOTE: 1.
PAGE 16
LT1057/LT1058 TYPICAL APPLICATION 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 .005 (0.127) RAD MIN .009 – .013 (0.229 – 0.330) 1 .291 – .299 (7.391 – 7.595) NOTE 4 .010 – .029 × 45° (0.254 – 0.737) 2 3 4 5 .093 – .104 (2.362 – 2.