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LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
* * * * * * *
Maximum Equivalent Input Noise Voltage: 3.8 nV/Hz at 1 kHz 4.5 nV/Hz at 10 Hz Low Peak-to-Peak Equivalent Input Noise Voltage: 60 nV Typ From 0.1 Hz to 10 Hz Slew Rate (LT1037 and LT1037A): 11 V/s Min High Voltage Amplification: 7 V/V Min, RL = 2 k 3 V/ V Min, RL = 600 Low Input Offset Voltage: 25 V Max Low Input Offset Voltage Temperature Coefficient: 0.6 V/C Max Common-Mode Rejection Ratio: 117 dB Min
DW PACKAGE (TOP VIEW)
LT1007A and LT1037A Specifications:
NC NC VIO TRIM IN - IN + VCC - NC NC
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
NC NC VIO TRIM VCC+ OUT NC NC NC
JG OR P PACKAGE (TOP VIEW)
description
VIO TRIM IN - IN + VCC -
1 2 3 4
8 7 6 5
VIO TRIM VCC + OUT NC
These monolithic operational amplifiers feature extremely low-noise performance and out standing precision and speed specifications.The typical differential voltage amplification (at TA = 25C) of these devices is an extremely high 20 V/V driving a 2-k load to 12 V and 12 V/ V driving, a 600 - 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 greatly improved compared to equivalent grades of competing amplifiers.
AVAILABLE OPTIONS VIO max AT 25C 60 V 0C to 70 C 70C 25 V 60 V 25 V 60 V C - 55C to 125 C 125C 25 V 60 V PACKAGE SMALL-OUTLINE (DW) LT1007CDW -- LT1037CDW -- -- -- -- CERAMIC DIP (JG) -- -- -- -- LT1007MJG LT1007AMJG LT1037MJG PLASTIC DIP (P) LT1007CP LT1007ACP LT1037CP LT1037ACP LT1007MP LT1007AMP LT1037MP
NC - No internal connection
TA
25 V -- LT1037AMJG LT1037AMP The DW packages are available taped and reeled. Add the suffix R to the device type, (e.g.,LT1007CDWR).
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright (c) 1993, Texas Instruments Incorporated
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SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
2
POST OFFICE BOX 655303 * DALLAS, TEXAS 75265
schematic
VIO TRIM VIO TRIM VCC + 450 A 3.4 k Q3 Q4 Q8 - Q5 Q6 Q10 Q1B - IN + Q1A Q2B Q2A 200 20 Q13 IN - Q11 Q12 Q15 Q16 200 Q24 500 A 6 k 50 VCC - - C1 = 110 pF for LT1007 C1 = 12 pF for LT1037 All component values shown are nominal. 80 pF 20 pF Q30 Q22 - Q23 - Q29 Q9 Q17 Q19 Q20 750 Q25 OUT Q26 C1 20 Q7 17 k 130 pF 17 k 1.2 k 1.2 k Q18 Q27 3.4 k 750 A 240 A Q28
240 A
120 A
200
6 k
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC + (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 V Supply voltage, VCC - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 22 V Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC Duration of output short circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unlimited Differential input current (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 mA Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range: LT1007C, LT1007AC, LT1037C, LT1037AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C LT1007M, LT1007AM, LT1037M, LT1037AM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to 125C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to 150C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: DW and P packages . . . . . . . . . . . . 260C Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: JG package . . . . . . . . . . . . . . . . . . . . 300C
NOTES: 1. All voltage values, unless otherwise noted, are with respect to the midpoint between VCC + and VCC -. 2. The inputs are protected by back-to-back diodes. Current limiting resistors are not used in order to achieve low noise. Excessive input current will flow if a differential input voltage in excess of approximately 0.7 V is applied between the inputs, unless some limiting resistance is used. DISSIPATION RATING TABLE PACKAGE DW JG P TA 25 C POWER RATING 1025 mW 1050 mW 1000 mW DERATING FACTOR ABOVE TA = 25 C 8.2 mW/ C 8.4 mW/ C 8 mW/ C TA = 70 C POWER RATING 656 mW 672 mW 640 mW TA = 125 C POWER RATING N/A 210 mW 200 mW
recommended operating conditions
C-SUFFIX MIN Supply voltage, VCC + Supply voltage, VCC - Input voltage VI voltage, Operating free-air temperature, TA TA = 25 C TA = full range 4 -4 11 10.5 0 70 NOM 15 - 15 MAX 22 - 22 M-SUFFIX MIN 4 -4 11 10.3 - 55 125 NOM 15 - 15 MAX 22 - 22 UNIT V V V V C
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LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
electrical characteristics, VCC = 15 V
PARAMETER VIO VIO Input offset voltage Average temperature coefficient of input offset voltage Input offset current Input bias current Peak output voltage swing RL= 2 k RL= 600 RL= 2 k RL 2 k, VO = 12 V AVD Large signal Large-signal differential voltage lifi i amplification RL 1 , VO = 10 V RL 600 , VO = 10 V RL 2 k, VO = 10 V RL 1 k, VO = 10 V ri(CM) ro CMRR Common-mode input resistance Open-loop output resistance Common-mode rejection ratio Supply voltage rejection ratio Power dissipation VIC = 11 V VIC = 10.5 V VCC = 4 V to 18 V VCC = 4.5 V to 18 V LT1007C, LT1007AC PD LT1037C, LT1037AC TEST CONDITIONS See Note 3 TA 25 C 0 C to 70 C 0C to 70C 25 C 0C to 70C 25 C 0C to 70C 25 C 25 C 0C to 70C 25 C 25 C 25 C 0C to 70C 0C to 70C 25 C 25 C 25 C 0C to 70C 25 C 0C to 70C 25C 25C 0C to 70C 110 106 106 102 80 85 140 140 160 126 12.5 10.5 12 5 3.5 2 2.5 2 5 70 126 117 114 110 106 80 80 120 130 144 mW 130 20 16 12 13.5 12.5 15 12 LT1007C, LT1037C MIN TYP 20 MAX 60 110 1 50 70 55 75 13 11 12.5 7 5 3 4 2.5 7 70 130 dB G 20 16 12 V/ V 13.8 12.5 V 10 7 LT1007AC, LT1037AC MIN TYP 10 MAX 25 50 0.6 30 40 35 45 UNIT V V/ C
IIO IIB
nA nA
VOM
kSVR
dB
NOTE 3: VIO measurements are performed by automatic test equipment approximately 0.5 seconds after application of power.
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LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
electrical characteristics, VCC = 15 V
PARAMETER TEST CONDITIONS TA 25 C - 55 C to 125 C - 55 C to 125 C 25 C - 55 C to 125 C 25 C - 55 C to 125 C RL = 2 k RL = 600 RL = 2 k RL 2 k, VO = 12 V AVD Large signal Large-signal differential voltage amplification lifi i RL 1 k, VO = 10 V RL 600 , VO = 10 V RL 2 k, VO = 10 V RL 1 k, VO = 10 V ri(CM) ro CMRR Common-mode input resistance Open-loop output resistance Common-mode rejection ratio Supply voltage y g rejection ratio VIC = 11 V VIC = 10.3 V VCC = 4 V to 18 V VCC = 4.5 V to 18 V LT1007M, LT1007AM LT1037M, LT1037AM 25 C 25 C - 55 C to 125 C 25 C 25 C 25 C - 55 C to 125 C - 55 C to 125 C 25 C 25 C 25 C - 55 C to 125 C 25 C - 55 C to 125 C 25 C 25 C - 55 C to 125 C 110 104 106 100 80 85 140 140 170 126 12.5 10.5 12 5 3.5 2 2 1.5 5 70 126 117 112 110 104 80 80 120 130 150 mW 130 dB 20 16 12 13.5 12.5 15 12 LT1007M, LT1037M MIN VIO VIO Input offset voltage Average temperature coefficient of input offset voltage Input offset current Input bias current Peak output voltage swing See Note 3 TYP 20 MAX 60 160 1 50 85 55 95 13 11 12.5 7 5 3 3 2 7 70 130 dB G 20 16 12 V/ V 13.8 12.5 V 10 7 MIN LT1007AM, LT1037AM TYP 10 MAX 25 60 0.6 30 50 35 60 V V/ C UNIT
IIO IIB
nA nA
VOM
kSVR
PD
Power dissipation
NOTE 3: VIO measurements are performed by automatic test equipment approximately 0.5 seconds after application of power.
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LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
operating characteristics, VCC = 15 V, TA = 25C
PARAMETER SR VN(PP) Vn In GBW Slew rate Peak-to-peak equivalent input noise voltage Equivalent input q noise voltage Equivalent input q noise current Gain bandwidth product roduct TEST CONDITIONS RL 2 k, AVD 1 (LT1007, LT1007A) RL 2 k, AVD 5 (LT1037, LT1037A) f = 0.1 Hz to 10 Hz, See Note 4 f = 10 Hz f = 1 kHz f = 10 kHz, See Note 5 f = 1 kHz, See Note 5 f = 100 kHz f = 10 kHz, AV 15 5 LT1007, LT1007A MIN 1.7 17 TYP 2.5 25 0.06 2.8 2.5 1.5 0.4 8 45 60 0.13 4.5 3.8 4 0.6 MAX LT1007, LT1007A MIN 11 TYP 15 0.06 2.8 2.5 1.5 0.4 0.13 4.5 3.8 4 0.6 MAX UNIT V/s V nV/Hz pA/Hz MHz
NOTES: 4. See the test circuit and frequency response curve for 0.1-Hz to 10-Hz noise (Figure 39) in the Applications Information section. 5. See the test circuit for current noise measurement (Figure 40) in the Applications Information section.
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LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
TYPICAL CHARACTERISTICS table of graphs
FIGURE VIO VIO IIO IIB Input offset voltage Change in input offset voltage Input offset current Input bias current Common-mode limit voltage VOM Maximum peak output voltage swing vs Temperature vs Time after power on vs Time (long-term stability) vs Temperature vs Temperature over common-mode range vs Free-air temperature vs Load resistance vs Frequency vs vs vs vs vs vs at Frequency Frequency (LT1007) Frequency (LT1037) Temperature Load resistance Supply voltage 2 k and 600 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 16 17 18 19 20 11 12 19 20 21 22 23 24 25 26 27 19 20 28 29 30 31 32 33 34
AVD
Differential voltage amplification
VID CMRR kSVR SR m
Differential input voltage Common-mode rejection ratio Supply voltage rejection ratio Slew rate Phase shift Phase margin
vs Output voltage vs Frequency vs Frequency vs Free-air temperature (LT1007) vs Free-air temperature (LT1037) vs Frequency (LT1007) vs Frequency (LT1037) vs Free-air temperature (LT1007) vs Free-air temperature (LT1037) vs vs vs vs vs Free-air temperature Time (0.01-Hz to 1-Hz noise) Frequency Bandwidth Supply voltage
Vn
Equivalent input noise voltage
In GBW IOS ICC zo
Equivalent input noise current Total noise Gain bandwidth product Short-circuit output current Supply current Closed-loop output impedance Pulse response (LT1037) Pulse response (LT1007)
vs Frequency vs Source resistance vs Free-air Temperature (LT1007) vs Free-air Temperature (LT1037) vs Time (from short to GND) vs Supply voltage vs Frequency Small-signal (CL = 15 pF) Large-signal Small-signal (CL = 15 pF) Large-signal
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LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
TYPICAL CHARACTERISTICS
INPUT OFFSET VOLTAGE OF REPRESENTATIVE UNITS vs FREE-AIR TEMPERATURE
50 40 VIO VIO - Input Offset Voltage - V V 30 20 10 0 - 10 - 20 LT1007, LT1037 - 30 - 40 - 25 0 25 50 75 100 125 LT1007A, LT1037A LT1007, LT1037 VIO - Change in Input Offset Voltage - V V VIO VCC = 15 V 10 VCC = 15 V TA = 25C 8
INPUT OFFSET VOLTAGE vs TIME AFTER POWER ON
6
4 DW, JG, or P Package 2
- 50 - 50
TA - Free-Air Temperature - C
Figure 1
LONG TERM STABILITY OF INPUT OFFSET VOLTAGE FOR FOUR REPRESENTATIVE UNITS
10 VIO VIO - Change in Input Offset Voltage - V V 60
5
IIO VIO - Input Offset Current - mA
0
0.2 V/Month Trend Line
-5 0.2 V/Month Trend Line
- 10
0
2
4
6
8
10
t - Time - months
Figure 3
Data at high and low temperatures are applicable within the rated operating free-air temperature ranges of the various devices.
8
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AA AA AA AA AA
50 40 30 20
AA AA AA
AA AA AA AA
0
0
1
2
3
4
5
Time After Power On - minutes
Figure 2
INPUT OFFSET CURRENT vs TEMPERATURE
VCC = 15 V
LT1007, LT1037 10 LT1007A, LT1037A 0 - 75 - 50 - 25 0 25 50 75 100 125
TA - Free-Air Temperature - C
Figure 4
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
TYPICAL CHARACTERISTICS
INPUT BIAS CURRENT vs FREE-AIR TEMPERATURE
50 VCC = 15 V 40 IIIB - Input Bias Current - nA IB IIIB - Input Bias Current - nA IB 10 5 0 -5 -1 0 - 15 - 20 - 15 ri(CM) = 20 V = 7 G 3 nA 20 15 Device With Positive Input Current
INPUT BIAS CURRENT vs COMMON-MODE INPUT VOLTAGE
30
20 LT1007M, LT1037M 10 LT1007AM, LT1037AM 0
Device With Negative Input Current VCC = 15 V TA = 25C - 10 -5 0 5 10 VIC - Common-Mode Input Voltage 15
- 50
- 25 0 25 50 75 100 125 TA - Free-Air Temperature - C
150
Figure 5
COMMON-MODE INPUT VOLTAGE RANGE LIMITS vs FREE-AIR TEMPERATURE
VCC+ -1 Common-Mode Voltage - V (Referred to Power Supply Voltages) VOM - Output Voltage Swing - V VOM -2 -3 -4 VCC + = 3 V to 20 V Positive Limit 15 13.5 12 10.5 9 7.5 6 4.5 3
Figure 6
PEAK OUTPUT VOLTAGE SWING vs LOAD RESISTANCE
4 3 2 1 - 25 VCC - = - 3 V to - 20 V Negative Limit
1.5 0 100 300 1k 3k 10 k
VCC- - 50
0 25 50 75 100 TA - Free-Air Temperature - C
125
Figure 7
Data at high and low temperatures are applicable within the rated operating free-air temperature ranges of the various devices.
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AAAAA AAAAA
Positive Swing Negative Swing RL - Load Resistance -
VCC = 15 V TA = 25C
AA AA
Figure 8
9
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
TYPICAL CHARACTERISTICS
PEAK-TO-PEAK OUTPUT VOLTAGE SWING vs FREQUENCY
VO(pp) VO(PP) - Peak-to-Peak Output Voltage Swing - V 28 24 20 180 AVD A VD - Differential Voltage Amplification - dB 160 140 120 100 80 60 40 20 0 1 100 10 k 1M f - Frequency - Hz 100 M LT1007 LT1037 VCC = 15 V RL = 2 k TA = 25 C
DIFFERENTIAL VOLTAGE AMPLIFICATION vs FREQUENCY
16 LT1037 12 LT1007 8 4 0 VCC = 25C TA = 25C 1k 10 k 100 k 1M f - Frequency - Hz 10 M
Figure 9
LT1007
DIFFERENTIAL VOLTAGE AMPLIFICATION AND PHASE SHIFT vs FREQUENCY
40 AVD A VD - Differential Voltage Amplification - dB 35 30 25 20 15 10 5 170 VCC = 15 V CL = 100 pF TA = 25C 1 10 f - Frequency - MHz 180 190 100 0 AVD 90 100 110 120 - Phase Shift 130 140 150 160 50 AVD A VD - Differential Voltage Amplification - dB 45 40
30
130 140 150 AVD AV = 5 160 170 180 190 1 10 f - Frequency - MHz 100
25 20
15 10 5
-5
- 10 0.1
0 0.1
Figure 11
Figure 12
10
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- Phase Shift
AA AA AA AA AA
AA AA AA AA AA AA
- 20 0.01
Figure 10
LT1037
DIFFERENTIAL VOLTAGE AMPLIFICATION AND PHASE SHIFT vs FREQUENCY
90 VCC = 15 V 100 CL = 100 pF TA = 25C 110 120
35
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
TYPICAL CHARACTERISTICS
DIFFERNTIAL VOLTAGE AMPLIFICATION vs FREE-AIR TEMPERATURE
25 AAVD - Differential Voltage Amplification - dB VD AVD A VD - Differential Voltage Amplification - dB 25 VCC = 15 V TA = 25C 20
DIFFERNTIAL VOLTAGE AMPLIFICATION vs LOAD RESISTANCE
20
RL = 2 k
RL = 1 k 15 RL = 600 10
15
10
5
0 - 50
- 25
0 25 50 75 100 TA - Free-Air Temperature - C
125
Figure 13
DIFFERNTIAL VOLTAGE AMPLIFICATION vs SUPPLY VOLTAGE
25 TA = 25C RL = 2 k
A VD - Differential Amplification - dB AVD
VID VID - Differential Input Voltage - V
20
15 RL = 600 10
0
0
5
10
15
20
25
VCC - Supply Voltage - V
Figure 15
Data at high and low temperatures are applicable within the rated operating free-air temperature ranges of the various devices.
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AA AA
5
AA AA AA
VCC = 15 V VO = 10 V VO = 8 V for TA 100 C RL = 600
5
AA AA AA AA AA
0 0.1
0.4 1 4 RL - Load Resistance - k
10
Figure 14
DIFFERNTIAL INPUT VOLTAGE vs OUTPUT VOLTAGE
4 VCC = 15 V TA = 25C 3
2
1
RL = 600
0 RL = 2 k -1
-2 - 15
- 10
-5
0
5
10
15
VO - Output Voltage - V
Figure 16
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LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
TYPICAL CHARACTERISTICS
COMMON-MODE REJECTION RATIO vs FREQUENCY
140 CMRR - Common-Mode Rejection Ratio - dB k SVR - Supply Voltage Rejection Ratio - dB VCC = 15 V VCM = 10 V TA = 25C 160 TA = 25C 140 120 100 80 60 40 20 0 Positive Supply
SUPPLY VOLTAGE REJECTION RATIO vs FREQUENCY
120
100 LT1037
Negative Supply
80 LT1007 60
40 103
104
105 f - Frequency - Hz
106
107
Figure 17
LT1007
SLEW RATE, PHASE MARGIN AND GAIN BANDWIDTH PRODUCT vs FREE-AIR TEMPERATURE
70 m - Phase Margin m m 60 Gain Bandwidth Product 9 50 m - Phase Margin m
m
70
50 60 (f = 100 kHz) GBW 50 SR 15
SR - Slew Rate - V/s s
SR - Slew Rate - V/s s
(f = 100 kHz) GBW
8
3
20
SR 2 VCC = 15 V CL = 100 pF 1 - 50 - 25 0 25 50 75 100 TA - Free-Air Temperature - C
7
125
10 - 50
- 25
0 25 50 75 100 TA - Free-Air Temperature - C
125
Figure 19
Figure 20
Data at high and low temperatures are applicable within the rated operating free-air temperature ranges of the various devices.
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Gain Bandwidth Product
AA AA AA AA
1
10
102
103 104 105 106 f - Frequency - Hz
107
108
Figure 18
LT1037
SLEW RATE, PHASE MARGIN AND GAIN BANDWIDTH PRODUCT vs FREE-AIR TEMPERATURE
VCC = 15 V CL = 100 pF 60
AA AA
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
TYPICAL CHARACTERISTICS
EQUIVALENT INPUT NOISE VOLTAGE vs FREE-AIR TEMPERATURE
5 nV/ Vn V n - Equivalent Input Noise Voltage - nV/Hz Hz VCC = 15 V
EQUIVALENT INPUT NOISE VOLTAGE OVER A 100-SECOND TIME PERIOD
f = 0.01 Hz to 1 Hz
f = 10 Hz 3 f = 1kHz 2
1
0 - 50
- 25
0 25 50 75 100 TA - Free-Air Temperature - C
125
Vn Vn - Noise Voltage - 20 nV/HzHz nV/
Figure 21
EQUIVALENT INPUT NOISE VOLTAGE vs FREQUENCY
10 VCC = 15 V TA = 25C 30
Vn - Equivalent Input Noise Voltage - nV/HzHz Vn nV/
100
V n - RMS Noise Voltage - V Vn
10
Maximum 3 1/f Corner = 2 Hz 0.1 0.1 Typical
1
10 100 f - Frequency - Hz
1000
Figure 23
Data at high and low temperatures are applicable within the rated operating free-air temperature ranges of the various devices.
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AAA AAA AAA
0 20 40 60 t - Time - s 80 100
AA AA AA AA AA AA
4
Figure 22
BROADBAND NOISE VOLTAGE 0.1 Hz TO INDICATED FREQUENCY
VCC = 15 V TA = 25C 1
0.1
0.01 0.1
1 10 B - Bandwidth - kHz
100
Figure 24
13
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
TYPICAL CHARACTERISTICS
EQUIVALENT INPUT NOISE VOLTAGE vs SUPPLY VOLTAGE
5 Vn - RMS Voltage Noise Density - nV/HzHz Vn nV/ I n - RMS Noise Current Density - pA/ Hz In pA/Hz TA = 25C 4 10
EQUIVALENT INPUT NOISE CURRENT vs FREQUENCY
VCC = 15 V
3
f = 10 Hz
f = 1 kHz 2
1
0
0
5
10 15 20 VCC - Supply Voltage - V
25
Figure 25
TOTAL NOISE VOLTAGE vs SOURCE RESISTANCE
1000 V n - Total Noise Voltage - nV/HzHz Vn nV/ VCC = 15 V TA = 25C IIOS - Short Circuit Current - mA OS 50 40
R
100
R
RS = 2R At 1 kHz
At 10 Hz 10
Resistor Noise Only 1 0.1 1 10 RS - Source Resistance - k
100
Figure 27
Data at high and low temperatures are applicable within the rated operating free-air temperature ranges of the various devices.
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AAA AAA AAA
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AA AA AA
AA AA AA AA AA AA
3
Maximum 1
0.3
1/f Corner = 120 Hz
Typical
0.1 10
100 1k f - Frequency - Hz
10 k
Figure 26
SHORT-CIRCUIT OUTPUT CURRENT vs ELAPSED TIME
TA = - 55C 30 20 10 VCC = 15 V 0 - 10 - 20 - 30 - 40 0 1 2 TA = 125C TA = 25C TA = - 55C 3 TA = 25C TA = 125C
- 50
Time From Output Short to Ground - minutes
Figure 28
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
TYPICAL CHARACTERISTICS
SUPPLY CURRENT vs SUPPLY VOLTAGE
4 100
CLOSED-LOOP OUTPUT IMPEDANCE vs FREQUENCY
Zo - Output Impedance - zo
10 LT1007 AV = 1000 1 LT1037 AV = 1000
ICC I CC - Supply Current - mA
3
TA = 125C TA = 25C TA = - 55C
2
0.1 LT1007 AV = 1 0.01
LT1037 AV = 5 VCC = 15 V IO = 1 mA TA = 25C
VO VO - Output Voltage - mV
20 0 - 20 - 40 - 60 VCC = 15 V AV = 5 CL = 15 pF TA = 25C 0 200 400 600 800 1000 1200 1400 1600 t - Time - ns
VO - Output Voltage - mV VO
- 80
Figure 31
Data at high and low temperatures are applicable within the rated operating free-air temperature ranges of the various devices.
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AA AA
AA AA AA AA
1
0 0
5 10 15 VCC - Supply Voltage - V
20
0.001 10
100
1k 10 k f - Frequency - Hz
100 k
1M
Figure 29
LT1037
Figure 30
LT1037
VOLTAGE-FOLLOWER SMALL-SIGNAL PULSE RESPONSE
80 60 40 20 15 10 5 0 -5 - 10 - 15
VOLTAGE-FOLLOWER LARGE-SIGNAL PULSE RESPONSE
VCC = 15 V AV = 5 TA = 25C
- 20 0 1 2 3 4 5 t - Time - s 6 7 8
Figure 32
15
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
TYPICAL CHARACTERISTICS
LT1007 LT1007
VOLTAGE-FOLLOWER SMALL-SIGNAL PULSE RESPONSE
80 60 VO VO - Output Voltage - mV 40 20 0 - 20 - 40 - 60 - 80 VCC = 15 V AV = 1 CL = 15 pF TA = 25C VO VO - Output Voltage - mV 8 6 4 2 0 -2 -4 -6
VOLTAGE-FOLLOWER LARGE-SIGNAL PULSE RESPONSE
VCC = 15 V AV = - 1 TA = 25C
0
0.5
1
1.5 2 2.5 t - Time - s
3
3.5
4
Figure 33
APPLICATION INFORMATION general
The LT1007- and 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 and LT1037 may be fitted to A741 sockets by removing or modifying external nulling components.
offset voltage adjustment
The input offset voltage and its change with temperature of the LT1007 and LT1037 are permanently trimmed to a low level at wafer testing . However, if further adjustment of VIO is necessary, the use of a 10-k nulling potentiometer, as shown in Figure 35, will not degrade drift with temperature. Trimming to a value other than zero creates a drift of VIO/300 V/C (e.g., if VIO is adjusted to 300 V, the change in temperature coefficient will be 1 V/C). The adjustment range with a 10-k potentiometer is approximately 2.5 mV. If a smaller adjustment range is needed, the sensitivity and resolution of the nulling can be improved by using a smaller potentiometer in conjunction with fixed resistors. The example in Figure 36 has an approximate null range of 200 V.
offset voltage and drift
Unless proper care is exercised, thermocouple effects at the contacts to the input terminals, caused by temperature gradients across dissimilar metals, can exceed the inherent temperature coefficient of the amplifier. Air currents should be minimized, package leads should be short, input leads should be close together, and input leads should be at the same temperature.
16
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AA AA
AA AA
-8
0
2
4
6
8
10
12
14
16
t - Time - s
Figure 34
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
APPLICATION INFORMATION
1 k VCC + 10 k VCC + 4.7 k 4.7 k
OUT + + IN + IN + VCC - 4 VCC -
Figure 35. Standard Adjustment
Figure 36. Improved Sensitivity Adjustment
The circuit shown in Figure 37 can be used to measure offset voltage. In addition, with the supply voltages increased to 20 V, it can be used as the burn-in configuration for the LT1007 and LT1037. When RF 100 and the input is driven with a fast large-signal pulse ( > 1 V), the output waveform will be as shown in Figure 38. During the fast-feedthrough-like portion of the output, the input protection diodes effectively short the output to the input and a current, limited only by the output short-circuit protection, is drawn by the signal generator. When RF is 500 , the output is capable of handling the current requirements (IL 20 mA at 10 V), the amplifier stays in its active mode, and a smooth transition occurs. When RF is > 2 k, 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 (20 pF to 50 pF) in parallel with RF will eliminate this problem.
50 k 15 V -
100 +
VO -
RF
50 k
- 15 V VO = 1000 VOS
+
Resistors must have low thermoelectric potential
Figure 37. Test Circuit for Offset Voltage and Offset Voltage Drift With Temperature
Figure 38. Pulse Operation
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- OUT Output 2.8 V /s 17
-
IN -
IN -
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
APPLICATION INFORMATION noise testing
Figure 39 shows a test circuit for 0.1-Hz to 10-Hz peak-to-peak noise measurement of the LT1007 and LT1037. The frequency response of this noise tester indicates that eeethe 0.1 Hz corner is defined by only one zero. Because the time limit acts as an additional zero to eliminate noise contributions from the frequency band below 0.1 Hz, the test time to measure 0.1-Hz to 10-Hz noise should not exceed 10 seconds.
0.1 Hz to 10 Hz p-p NOISE TESTER FREQUENCY RESPONSE
100
90 80 Gain - dB
70 60 50 40 30 0.01
0.1
1 Frequency - Hz
10
100
0.1 F
Device under test NOTE: All capacitor values are for non-polarized capacitors only.
18
- 2 k + 4.7 F + LT1001 - 100 k 2.2 F 110 k 4.3 k 22 F Scope x1 RIN = 1 M Voltage Gain = 50,000 24.3 k 0.1 F
10
100 k
Figure 39. 0.1-Hz To 10-Hz Noise Test Circuit
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LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
APPLICATION INFORMATION
Special test precautions are required to measure the typical 60-nV peak-to-peak noise performance of the LT1007 and LT1037: 1. The device should be warmed up for at least five minutes. As the operational amplifier warms up, the offset voltage typically changes 3 V, due to the chip temperature increasing 10C to 20C from the moment the power supplies are turned on. In the 10-second measurement interval, these temperature-induced effects can easily exceed tens of nanovolts. 2. The device must be well shielded from air currents to eliminate thermoelectric effects. In excess of a few nanovolts, thermoelectric effects would invalidate the measurements. 3. Sudden motion in the vicinity of the device can produce a feedthrough effect that increases observed noise. When measuring noise on a large number of units, a noise-voltage density test is recommended. A 10-Hz noise-voltage density measurement will correlate well with a 0.1-Hz to 10-Hz peak-to-peak noise reading since both results are determined by the white noise and the location of the 1/f corner frequency. Figure 40 shows a circuit that measures noise current and presents the formula for calculating noise current.
10 k 100 500 k - eno + 500 k In (130 nV) + [vn 1*MW x 100 ]
2 212
Figure 40. Noise Test Circuit The LT1007 and LT1037 achieve low noise, in part, by operating the input stage at 120 A versus the typical 10 A for most other operational amplifiers. Voltage noise is directly proportional to the square root of the stage current; therefore, the LT1007 and LT1037 noise current is relatively high. At low frequencies, the low 1/f current-noise corner frequency ( 120 Hz) minimizes noise current to some extent. In most practical applications, however, noise current will not limit system performance; this is illustrated in Figure 27, where: total noise = [(noise voltage)2(noise current x RS)2 + (resistor noise)2]1/2 Three regions can be identified as a function of source resistance: (i) (ii) (iii) RS 400 RS = 400 to 50 k at 1 kHz RS = 400 to 8 k at 10 kHz RS > 50 at 1 kHz RS > 8 k at 10 Hz Voltage noise dominates in region (i) Resistor noise dominates in region (ii) Current noise dominates in region (iii)
The LT1007 and LT1037 should not be used in region (iii) where total system noise is at least six times higher than the noise voltage of the operational amplifier (i.e., the low-voltage noise specification is completely wasted).
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19
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
APPLICATION INFORMATION
The sine wave generator application shown below, utilizes the low-noise and low-distortion characteristics of the LT1037.
430 2
#327 Lamp
C
R
1 2 RC R =1591.5 0.1 % C = 0.1 F 0.1 % f
+
TOTAL HARMONIC DISTORTION 0.0025% NOISE 0.001% AMPLITUDE = 8 V OUTPUT FREQUENCY = 1.000 kHz FOR VALUES GIVEN 0.4%
Figure 41. Ultra-Pure 1-kHz Sine-Wave Generator
EQUIVALENT INPUT NOISE VOLTAGE OVER A 10-SECOND PERIOD
f = 0.1 Hz to 10 Hz 365 1% Voltage Noise (20 nV/DIV) 340 k 1% 15 k 5% 15 V - 2 7 6 Output 20 k Trim
IN +
0
1
2
3
5 4 6 t - Time - s
7
8
9
10
The high gain and wide bandwidth of the LT1037 and (LT1007) is useful in low-frequency high-closed-loop-gain amplifier applications. A typical precision operational amplifier may have an open loop gain of one million with 500 kHz bandwidth. As the gain error plot shows, this device is capable of 0.1% amplifying accuracy up to 0.3 Hz only. Even instrumentation range signals can vary at a faster rate. The LT1037's gain precision - bandwidth product is 200 times higher, as shown.
Figure 42
Figure 43. Gain 1000 Amplifier With 0.01% Accuracy, DC to 5 Hz
20
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+
+
3
- LT1037 6 Output C R LT1037 3 4 - 15 V RN60C Film Resistors
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
APPLICATION INFORMATION
GAIN ERROR vs FREQUENCY CLOSED LOOP GAIN = 1000
1 Typical Precision Operational Amplifier LT1007 IN + 3 + LT1007 LT1037 0.01 -15 V LOOP GAIN + CLOSEDLOOP GAIN OPEN 100 Positive feedback to one of the nulling terminals creates approximately 5 V of hysteresis. Output can sink 16 mA. Input offset voltage is typically changed less than 5 V due to the feedback. 2 - 4 7 8 10 M 5%
15 V 365 1% 15 k 1% Output
0.1 Gain Error - %
GAIN ERROR 0.001 0.1
1 10 f - Frequency - Hz
Figure 44.
10 k Trim - 2
Figure 45. Microvolt Comparator With Hysteresis
340 k 1%
20 k 5%
LT1037 + 3
IN + The addition of the LT1007 doubles the amplifier's output drive to 33 mA. Gain accuracy is 0.02%, slightly degraded compared to above because of self heating of the LT1037 under load.
47 k Mag Phono Input
Figure 46. Precision Amplifier Drives 300- Load to 10 V
Figure 47. Phono Preamplifier
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+
15 5%
RL 300
100 pF 3
-
365 1%
6
+
-
2
6 LT1007 3 15 5%
0.01 F 7.8 k 15 V Output 10 V 100 2 7 LT1037 4 - 15 V All Resistors Metal Film 0.033 F 6 Output 100 k
21
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
APPLICATION INFORMATION
4.99 k 0.01
100 k
Tape Head Input
All Resistors Metal Film
Figure 48. Tape Head Amplifier
15 V +
10 F 10
1 k 33 100 F + 267
100 F + 2N2219A Chopped Detector Output 50 mA + 100 F 392 * 3 + - 15 V 7 4 - 15 V 6 Output To Demodulator 392 Synchronous
IR Radiation
Optical Chopper
Photo-Conductive Infra-Red Detector HgCdTe Type Infra-Red Associates, Inc 13 at 77K
Figure 49. Infra-Red Detector Preamplifier
22
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+
3
- 6 LT1037 Output
LT1007
2
316 k
2
392
1% metal film
* DALLAS, TEXAS 75265
LT1007, LT1007A, LT1037, LT1037A LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C - D3195, FEBRUARY 1989 - REVISED JANUARY 1993
APPLICATION INFORMATION
7.5 V 5 k 3 2.5 V LT1009 2 + 7 6
LT1007 - 4 -7.5 V
Reference Out 350 Bridge 30.1 k 10 k Zero Trim 2
15 V 3 + 7 6 1 F 0 to 10 V Output 30.1 k
LT1007 - 4 -15 V
2 +
7.5 V 7 6
LT1007 3 - 4 -7.5 V
RN60C Film Resistors
Gain Trim
50 k
499
The LT1007 is capable of providing excitation current directly to bias the 350- bridge at 5 V. With only 5 V across the bridge (as opposed to the usual 10 V) total power dissipation and bridge warm-up drift is reduced. The bridge output signal is halved, but the LT1007 can amplify the reduced signal accurately.
Figure 50. Strain Gauge Signal Conditioner With Bridge Excitation
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23
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Copyright (c) 1999, Texas Instruments Incorporated

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