Datasheet

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LT1007/LT1037

sn100737 100737fbs

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO

Low Noise, High Speed

Precision Operational Amplifiers

■

Guaranteed

4.5nV/√Hz 10Hz Noise

■

Guaranteed

3.8nV/√Hz 1kHz Noise

■

0.1Hz to 10Hz Noise, 60nV

P-P

Typical

■

Guaranteed

7 Million Min Voltage Gain, R

= 2k

■

Guaranteed

3 Million Min Voltage Gain, R

= 600Ω

■

Guaranteed

25µV Max Offset Voltage

■

Guaranteed

0.6µV/°C Max Drift with Temperature

■

Guaranteed

11V/µs Min Slew Rate (LT1037)

■

Guaranteed

117dB Min CMRR

The LT

1007/LT1037 series features the lowest noise

performance available to date for monolithic operational

amplifiers: 2.5nV/√Hz wideband noise (less than the noise of

a 400Ω resistor), 1/f corner frequency of 2Hz and 60nV peak-

to-peak 0.1Hz to 10Hz noise. Low noise is combined with

outstanding precision and speed specifications: 10µV offset

voltage, 0.2µV/°C drift, 130dB common mode and power

supply rejection, and 60MHz gain bandwidth product on the

decompensated LT1037, which is stable for closed-loop

gains of 5 or greater.

The voltage gain of the LT1007/LT1037 is an extremely high

20 million driving a 2kΩ load and 12 million driving a 600Ω

load to ±10V.

In the design, processing and testing of the device, particular

attention has been paid to the optimization of the entire

distribution of several key parameters. Consequently, the

specifications of even the lowest cost grades (the LT1007C

and the LT1037C) have been spectacularly improved com-

pared to equivalent grades of competing amplifiers.

The sine wave generator application shown below utilizes the

low noise and low distortion characteristics of the LT1037.

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

Ultrapure 1kHz Sine Wave Generator

TIME (SEC)

0246

VOLTAGE NOISE (20nV/DIV)

1007/37 TA02

■

Low Noise Signal Processing

■

Microvolt Accuracy Threshold Detection

■

Strain Gauge Amplifiers

■

Direct Coupled Audio Gain Stages

■

Sine Wave Generators

■

Tape Head Preamplifiers

■

Microphone Preamplifiers

1007/37 TA01

430Ω

OUTPUT

#327 LAMP

–

LT1037

f =

2πRC

R = 1591.5Ω ±0.1%

C = 0.1µF ±0.1%

TOTAL HARMONIC DISTORTION = < 0.0025%

NOISE = < 0.0001%

AMPLITUDE = ±8V

OUTPUT FREQUENCY = 1.000kHz FOR VALUES GIVEN ±0.4%

0.1Hz to 10Hz Noise

Summary of content (16 pages)

PAGE 1
LT1007/LT1037 Low Noise, High Speed Precision Operational Amplifiers U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO Guaranteed 4.5nV/√Hz 10Hz Noise Guaranteed 3.8nV/√Hz 1kHz Noise 0.1Hz to 10Hz Noise, 60nVP-P Typical Guaranteed 7 Million Min Voltage Gain, RL = 2k Guaranteed 3 Million Min Voltage Gain, RL = 600Ω Guaranteed 25µV Max Offset Voltage Guaranteed 0.
PAGE 2
LT1007/LT1037 W W U W ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage ...................................................... ±22V Input Voltage ............................ Equal to Supply Voltage Output Short-Circuit Duration .......................... Indefinite Differential Input Current (Note 9) ..................... ± 25mA Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec.)................. 300°C Operating Temperature Range LT1007/LT1037AC, C ......
PAGE 3
LT1007/LT1037 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER VS = ±15V, TA = 25°C, unless otherwise noted. CONDITIONS LT1007AC/AM LT1037AC/AM MIN TYP MAX LT1007C/I/M LT1037C/I/M MIN TYP MAX 7 5 Input Resistance, Common Mode Input Voltage Range UNITS GΩ ±11.0 ±12.5 ±11.0 ±12.
PAGE 4
LT1007/LT1037 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the temperature range – 40°C ≤ TA ≤ 85°C, VS = ±15V, unless otherwise noted. LT1007I/LT1037I MIN TYP MAX SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage (Note 2) ● 40 125 µV ∆VOS ∆Temp Average Input Offset Drift (Note 10) ● 0.3 1.0 µV/°C IOS Input Offset Current ● 20 80 nA IB Input Bias Current ● ±25 ±90 nA Input Voltage Range ● ±10 ±11.7 V VCM = ±10.
PAGE 5
LT1007/LT1037 U W TYPICAL PERFORMANCE CHARACTERISTICS 10Hz Voltage Noise Distribution 100 140 100 VS = ±15V TA = 25°C RMS VOLTAGE NOISE DENSITY (nV/√Hz) VS = ±15V TA = 25°C 497 UNITS MEASURED FROM SIX RUNS 120 NUMBER OF UNITS 0.02Hz to 10Hz RMS Noise. Gain = 50,000 (Measured on HP3582 Spectrum Analyzer) Voltage Noise vs Frequency 80 60 40 20 30 10 MAXIMUM 3 1 0.
PAGE 6
LT1007/LT1037 U W TYPICAL PERFORMANCE CHARACTERISTICS Voltage Gain vs Frequency 25 120 100 80 LT1037 LT1007 60 40 20 RL = 2k –1 20 15 RL = 600Ω 10 0 RL = 2k –1 1 0 5 0 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) 5 0 15 20 10 SUPPLY VOLTAGE (±V) 1007/37 G10 VOLTAGE GAIN (V/µV) OPEN-LOOP VOLTAGE GAIN (V/µV) Warm-Up Drift RL = 2k 15 10 RL = 1k 15 RL = 600Ω 10 VS = ±15V VOUT = ±10V VOUT = ±8V FOR TA ≥ 100°C AND RL = 600Ω 5 5 0 –50 10 50 25 0 75 TEMPERATURE (°C) 100 4 30
PAGE 7
LT1007/LT1037 U W TYPICAL PERFORMANCE CHARACTERISTICS Common Mode Limit vs Temperature Common Mode Rejection vs Frequency V+ 140 VS = ±15V VCM = ±10V TA = 25°C 100 LT1037 LT1007 80 60 15 V + = 3V TO 20V –2 –3 –4 +4 +3 V – = –3V TO –20V +2 104 105 106 FREQUENCY (Hz) V– 107 –50 –25 50 25 0 75 TEMPERATURE (°C) 100 1007/37 G19 10 25 50 75 0 TEMPERATURE (°C) 50 12 40 30 LT1007M LT1037M 20 15 0 25 50 –75 –50 –25 0 75 TEMPERATURE (°C) 100 125 6 50 10 AV = 1000 1 0.
PAGE 8
LT1007/LT1037 U W TYPICAL PERFORMANCE CHARACTERISTICS LT1037 Small-Signal Transient Response LT1037 Phase Margin, Gain Bandwidth Product, Slew Rate vs Temperature 0V 0V – 50mV – 10V PHASE MARGIN (DEG) 10V 20 VS = ±15V CL = 100pF 60 70 PHASE MARGIN 50 60 AVCL = 5 VS = ±15V CL = 15pF GBW AVCL = 5 VS = ±15V 1007/37 G29 1007/37 G28 50 SLEW 15 10 –50 –25 50 25 0 75 TEMPERATURE (°C) GAIN BANDWIDTH PROCUCT, fO = 10kHz (MHz) 50mV 70 SLEW RATE (V/µs) LT1037 Large-Signal Response 125 100
PAGE 9
LT1007/LT1037 U U W U APPLICATIONS INFORMATION General Offset Voltage and Drift The LT1007/LT1037 series devices may be inserted directly into OP-07, OP-27, OP-37 and 5534 sockets with or without removal of external compensation or nulling components. In addition, the LT1007/LT1037 may be fitted to 741 sockets with the removal or modification of external nulling components.
PAGE 10
LT1007/LT1037 U W U U APPLICATIONS INFORMATION As with all operational amplifiers when RF > 2k, a pole will be created with RF and the amplifier’s input capacitance, creating additional phase shift and reducing the phase margin. A small capacitor (20pF to 50pF) in parallel with RF will eliminate this problem. Noise Testing The 0.1Hz to 10Hz peak-to-peak noise of the LT1007/ LT1037 is measured in the test circuit shown (Figure 5a).
PAGE 11
LT1007/LT1037 U U W U APPLICATIONS INFORMATION The LT1007/LT1037 achieve their low noise, in part, by operating the input stage at 120µA versus the typical 10µA of most other op amps. Voltage noise is inversely proportional while current noise is directly proportional to the square root of the input stage current. Therefore, the LT1007/LT1037’s current noise will be relatively high. At low frequencies, the low 1/f current noise corner frequency (≈120Hz) minimizes current noise to some extent.
PAGE 12
LT1007/LT1037 U TYPICAL APPLICATIONS Precision Amplifier Drives 300Ω Load to ±10V Microvolt Comparator with Hysteresis 100M 5% 20k 5% 340k 1% 15V 10k TRIM 365Ω 1% 7 3 INPUT + 8 6 LT1007 2 – 15k 1% 2 – 3 + OUTPUT LT1007 365Ω 1% 4 2 – 3 + INPUT OFFSET VOLTAGE IS TYPICALLY CHANGED LESS THAN 5µV DUE TO THE FEEDBACK. 15Ω 5% 15Ω 5% 6 –15V POSITIVE FEEDBACK TO ONE OF THE NULLING TERMINALS CREATES APPROXIMATELY 5µV OF HYSTERESIS. OUTPUT CAN SINK 16mA.
PAGE 13
LT1007/LT1037 U TYPICAL APPLICATIONS Phono Preamplifier Tape Head Amplifier 4.99k 100Ω 2 – 0.01µF 7.87k 15V 316k 100k 7 0.033µF 100Ω 6 100pF 3 + 47k 2 – OUTPUT LT1037 4 0.01µF TAPE HEAD INPUT ALL RESISTORS METAL FILM 3 + LT1037 6 OUTPUT ALL RESISTORS METAL FILM –15V 1007/37 TA07 MAG PHONO INPUT 1007/37 TA06 W W SI PLIFIED SCHE ATIC 8 1 V+ 7 Q4 Q3 Q7 450µA 3.4k 3.4k 750µA 240µA Q28 Q8 Q6 V – Q5 130pF 17k 17k 1.2k 1.
PAGE 14
LT1007/LT1037 U PACKAGE DESCRIPTION H Package 8-Lead TO-5 Metal Can (.200 Inch PCD) (Reference LTC DWG # 05-08-1320) 0.335 – 0.370 (8.509 – 9.398) DIA 0.305 – 0.335 (7.747 – 8.509) 0.040 (1.016) MAX 0.050 (1.270) MAX 0.165 – 0.185 (4.191 – 4.699) SEATING PLANE GAUGE PLANE 0.010 – 0.045* (0.254 – 1.143) REFERENCE PLANE 0.500 – 0.750 (12.700 – 19.050) 0.016 – 0.021** (0.406 – 0.533) 0.027 – 0.045 (0.686 – 1.143) 45°TYP 0.027 – 0.034 (0.686 – 0.864) 0.200 (5.080) TYP 0.110 – 0.160 (2.794 – 4.
PAGE 15
LT1007/LT1037 U PACKAGE DESCRIPTION N8 Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) 0.400* (10.160) MAX 8 7 6 5 1 2 3 4 0.255 ± 0.015* (6.477 ± 0.381) 0.300 – 0.325 (7.620 – 8.255) 0.065 (1.651) TYP 0.009 – 0.015 (0.229 – 0.381) ( +0.035 0.325 –0.015 8.255 +0.889 –0.381 0.130 ± 0.005 (3.302 ± 0.127) 0.045 – 0.065 (1.143 – 1.651) ) 0.125 (3.175) 0.020 MIN (0.508) MIN 0.018 ± 0.003 0.100 (2.54) BSC (0.457 ± 0.
PAGE 16
LT1007/LT1037 U TYPICAL APPLICATIO Strain Gauge Signal Conditioner with Bridge Excitation 7.5V 5k 2.5V 3 7 + 6 LT1009 2 LT1007 – 4 –7.5V REFERENCE OUT 350Ω BRIDGE 15V 3 301k* – ZERO TRIM 10k 2 + – 6 4 OUTPUT 0V TO 10V 1µF 301k* GAIN TRIM 50k 499Ω* –15V 7 6 3 7 LT1007 7.5V 2 + LT1007 *RN60C FILM RESISTOR THE LT1007 IS CAPABLE OF PROVIDING EXCITATION CURRENT DIRECTLY TO BIAS THE 350Ω BRIDGE AT 5V.