LT1037CJ8 [Linear]
Low Noise, High Speed Precision Operational Amplifiers; 低噪声，高速精密运算放大器
| 型号： | LT1037CJ8 |
| 厂家： | 
Linear |
| 描述： | Low Noise, High Speed Precision Operational Amplifiers |
| 文件： | 总16页 (文件大小：368K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1007/LT1037
Low Noise, High Speed
Precision Operational Amplifiers
U
FEATURES
DESCRIPTION
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
a400Ωresistor),1/fcornerfrequencyof2Hzand60nVpeak-
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.
■
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 0.6µV/°C Max Drift with Temperature
■
Guaranteed 11V/µs Min Slew Rate (LT1037)
Guaranteed 117dB Min CMRR
■
U
APPLICATIONS
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.
■
Low Noise Signal Processing
■
Microvolt Accuracy Threshold Detection
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.
■
Strain Gauge Amplifiers
Direct Coupled Audio Gain Stages
Sine Wave Generators
Tape Head Preamplifiers
Microphone Preamplifiers
■
■
■
■
Thesinewavegeneratorapplicationshownbelowutilizesthe
low noise and low distortion characteristics of the LT1037.
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
TYPICAL APPLICATION
0.1Hz to 10Hz Noise
Ultrapure 1kHz Sine Wave Generator
430Ω
–
2
6
OUTPUT
LT1037
R
+
3
1
f =
2πRC
C
#327 LAMP
R = 1591.5Ω ±0.1%
C = 0.1µF ±0.1%
C
R
TOTAL HARMONIC DISTORTION = < 0.0025%
NOISE = < 0.0001%
AMPLITUDE = ±8V
OUTPUT FREQUENCY = 1.000kHz FOR VALUES GIVEN ±0.4%
1007/37 TA01
0
2
4
6
8
10
TIME (SEC)
1007/37 TA02
1
LT1007/LT1037
W W U W
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ...................................................... ±22V
Input Voltage ............................ Equal to Supply Voltage
Output Short-Circuit Duration .......................... Indefinite
Differential Input Current (Note 8) ..................... ±25mA
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................. 300°C
Operating Temperature Range
LT1007/LT1037AC, C ............................. 0°C to 70°C
LT1007/LT1037I ............................... –40°C to 85°C
LT1007/LT1037AM, M ..................... –55°C to 125°C
U
W U
PACKAGE/ORDER INFORMATION
TOP VIEW
TOP VIEW
TOP VIEW
V
TRIM
8
OS
V
V
OS
V
V
OS
OS
OS
1
2
3
4
1
2
3
4
8
7
6
5
8
7
6
5
V
TRIM
–IN
TRIM
OS
TRIM
+
TRIM
–IN
V
1
3
7
5
–
+
TRIM
–IN
+IN
+
+
V
–
+
V
–
+
2
6
OUT
+IN
OUT
NC
OUT
NC
+IN
–
–
V
V
NC
4
S8 PACKAGE
8-LEAD PLASTIC SO
J8 PACKAGE
8-LEAD CERDIP
N8 PACKAGE
8-LEAD PDIP
–
V
(CASE)
H PACKAGE
8-LEAD TO-5 METAL CAN
TJMAX = 150°C, θJA = 100°C/ W (J8)
JMAX = 100°C, θJA = 130°C/ W (N8)
TJMAX = 150°C, θJA = 190°C/ W
T
TJMAX = 150°C, θJA = 150°C/ W, θJC = 45°C/ W
ORDER PART NUMBER
ORDER PART NUMBER
ORDER PART NUMBER
LT1037CS8
LT1037IS8
LT1007ACJ8
LT1037ACJ8
LT1037ACN8
LT1037AMJ8
LT1037CJ8
LT1037CN8
LT1037IN8
LT1007ACH
LT1007AMH
LT1007CH
LT1007MH
LT1037ACH
LT1037AMH
LT1037CH
LT1037MH
LT1007CS8
LT1007IS8
LT1007ACN8
LT1007AMJ8
LT1007CJ8
LT1007CN8
LT1007IN8
LT1007MJ8
S8 PART MARKING
1037
1037I
1007
1007I
LT1037MJ8
VS = ±15V, TA = 25°C, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
LT1007AC/AM
LT1037AC/AM
LT1007C/I/M
LT1037C/I/M
TYP
SYMBOL
PARAMETER
CONDITIONS
(Note 1)
MIN
TYP
MAX
MIN
MAX
UNITS
µV
V
OS
Input Offset Voltage
10
25
20
60
∆V
∆Time
Long Term Input Offset
Voltage Stability
(Notes 2, 3)
0.2
1.0
0.2
1.0
µV/Mo
OS
I
I
Input Offset Current
Input Bias Current
7
30
12
50
nA
nA
OS
B
±10
0.06
±35
0.13
±15
0.06
±55
0.13
e
Input Noise Voltage
Input Noise Voltage Density
0.1Hz to 10Hz (Notes 3, 5)
µV
P-P
n
f = 10Hz (Notes 3, 4)
2.8
2.5
4.5
3.8
2.8
2.5
4.5
3.8
nV/√Hz
nV/√Hz
O
f = 1000Hz (Note 3)
O
i
n
Input Noise Current Density
f = 10Hz (Notes 3, 6)
f = 1000Hz (Notes 3, 6)
O
1.5
0.4
4.0
0.6
1.5
0.4
4.0
0.6
pA/√Hz
pA/√Hz
O
2
LT1007/LT1037
VS = ±15V, TA = 25°C, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
LT1007AC/AM
LT1037AC/AM
LT1007C/I/M
LT1037C/I/M
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
GΩ
V
Input Resistance, Common Mode
Input Voltage Range
7
5
±11.0 ±12.5
±11.0 ±12.5
CMRR
PSRR
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
= ±11V
117
110
130
130
110
106
126
126
dB
CM
V = ±4V to ±18V
S
dB
A
VOL
R ≥ 2k, V = ±12V
R ≥ 1k, V = ±10V
R ≥ 600Ω, V = ±10V
7.0
5.0
3.0
20.0
16.0
12.0
5.0
3.5
2.0
20.0
16.0
12.0
V/µV
V/µV
V/µV
L
O
L
O
L
O
V
OUT
Maximum Output Voltage Swing R ≥ 2k
±13.0 ±13.8
±11.0 ±12.5
±12.5 ±13.5
±10.5 ±12.5
V
V
L
R ≥ 600Ω
L
SR
Slew Rate
LT1007
LT1037
R ≥ 2k
1.7
11
2.5
15
1.7
11
2.5
15
V/µs
V/µs
L
A
VCL
≥ 5
GBW
Gain Bandwidth
Product
LT1007
LT1037
f = 100kHz (Note 7)
f = 10kHz (Note 7) (A
O
5.0
45
8.0
60
5.0
45
8.0
60
MHz
MHz
O
≥ 5)
VCL
Z
O
Open-Loop Output Resistance
V = 0V, I = 0
70
70
Ω
O
O
P
D
Power Dissipation
LT1007
LT1037
80
80
120
130
80
85
140
140
mW
mW
VS = ±15V, 0°C ≤ TA ≤ 70°C, unless otherwise noted.
LT1007AC
LT1037AC
TYP
LT1007C
LT1037C
TYP
SYMBOL
PARAMETER
CONDITIONS
(Note 1)
MIN
MAX
50
MIN
MAX
110
1.0
UNITS
µV
V
OS
Input Offset Voltage
Average Input Offset Drift
●
●
20
35
∆V
(Note 9)
0.2
0.6
0.3
µV/°C
OS
∆Temp
I
I
Input Offset Current
●
●
●
●
●
10
40
15
70
nA
nA
V
OS
B
Input Bias Current
±14
±45
±20
±75
Input Voltage Range
±10.5 ±11.8
±10.5 ±11.8
CMRR
PSRR
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
= ±10.5V
114
106
126
126
106
102
120
120
dB
dB
CM
V = ±4.5V to ±18V
S
A
R ≥ 2k, V = ±10V
R ≥ 1k, V = ±10V
●
●
4.0
2.5
18.0
14.0
2.5
2.0
18.0
14.0
V/µV
V/µV
VOL
L
O
L
O
V
P
Maximum Output Voltage Swing R ≥ 2k
●
●
±12.5 ±13.6
±12.0 ±13.6
V
OUT
L
Power Dissipation
90
144
90
160
mW
D
3
LT1007/LT1037
VS = ±15V, –40°C ≤ TA ≤ 85°C, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
LT1007I/LT1037I
SYMBOL
PARAMETER
CONDITIONS
(Note 1)
MIN
TYP
MAX
125
1.0
UNITS
µV
V
OS
Input Offset Voltage
Average Input Offset Drift
●
●
40
∆V
(Note 9)
0.3
µV/°C
OS
∆Temp
I
I
Input Offset Current
●
●
●
●
●
20
80
nA
nA
V
OS
B
Input Bias Current
±25
±90
Input Voltage Range
±10 ±11.7
CMRR
PSRR
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
= ±10.5V
105
101
120
120
dB
dB
CM
V = ±4.5V to ±18V
S
A
R ≥ 2k, V = ±10V
R ≥ 1k, V = ±10V
●
●
2.0
1.5
15.0
12.0
V/µV
V/µV
VOL
L
O
L
O
V
P
Maximum Output Voltage Swing
Power Dissipation
R ≥ 2k
L
●
●
±12.0 ±13.6
V
OUT
95
165
mW
D
VS = ±15V, –55°C ≤ TA ≤ 125°C, unless otherwise noted.
LT1007AM/LT1037AM
LT1007M/LT1037M
SYMBOL
PARAMETER
CONDITIONS
(Note 1)
MIN
TYP
MAX
MIN
TYP
MAX
160
1.0
UNITS
µV
V
OS
Input Offset Voltage
Average Input Offset Drift
●
●
25
60
50
∆V
(Note 9)
0.2
0.6
0.3
µV/°C
OS
∆Temp
I
I
Input Offset Current
●
●
●
●
●
15
50
20
85
nA
nA
V
OS
B
Input Bias Current
±20
±60
±35
±95
Input Voltage Range
±10.3 ±11.5
±10.3 ±11.5
CMRR
PSRR
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
= ±10.3V
112
104
126
126
104
100
120
120
dB
dB
CM
V = ±4.5V to ±18V
S
A
R ≥ 2k, V = ±10V
R ≥ 1k, V = ±10V
●
●
3.0
2.0
14.0
10.0
2.0
1.5
14.0
10.0
V/µV
V/µV
VOL
L
O
L
O
V
P
Maximum Output Voltage Swing
Power Dissipation
R ≥ 2k
L
●
●
±12.5 ±13.5
±12.0 ±13.5
V
OUT
100
150
100
170
mW
D
The
●
denotes the specifications which apply over the full operating
Note 4: 10Hz noise voltage density is sample tested on every lot. Devices
100% tested at 10Hz are available on request.
temperature range.
For MIL-STD components, please refer to LTC 883C data sheet for test
listing and parameters.
Note 5: See the test circuit and frequency response curve for 0.1Hz to
10Hz tester in the Applications Information section.
Note 1: Input Offset Voltage measurements are performed by automatic
test equipment approximately 0.5 seconds after application of power. AM
and AC grades are guaranteed fully warmed up.
Note 6: See the test circuit for current noise measurement in the
Applications Information section.
Note 7: This parameter is guaranteed by design and is not tested.
Note 2: Long Term Input Offset Voltage Stability refers to the average
trend line of Offset Voltage vs Time over extended periods after the first 30
days of operation. Excluding the initial hour of operation, changes in V
during the first 30 days are typically 2.5µV. Refer to typical performance
Note 8: The inputs are protected by back-to-back diodes. Current limiting
resistors are not used in order to achieve low noise. If differential input
voltage exceeds ±0.7V, the input current should be limited to 25mA.
Note 9: The Average Input Offset Drift performance is within the
specifications unnulled or when nulled with a pot having a range of 8kΩ to
20kΩ.
OS
curve.
Note 3: This parameter is tested on a sample basis only.
4
LT1007/LT1037
W
U
TYPICAL PERFORMANCE CHARACTERISTICS
0.02Hz to 10Hz RMS Noise. Gain = 50,000
(Measured on HP3582 Spectrum Analyzer)
10Hz Voltage Noise Distribution
Voltage Noise vs Frequency
100
140
120
100
80
V
= ±15V
= 25°C
V
T
= ±15V
= 25°C
S
A
S
A
T
497 UNITS MEASURED
FROM SIX RUNS
30
10
60
MAXIMUM
TYPICAL
40
3
1
20
1/f CORNER = 2Hz
1
0
179µV/√Hz
50,000
nV
MARKER AT 2Hz ( = 1/f CORNER) =
= 3.59
0.1
10
100
1000
0
3
5
6
7
8
9
10
1
2
4
√Hz
FREQUENCY (Hz)
VOLTAGE NOISE DENSITY (nV/√Hz)
1007/37 G03
1007/37 G02
1007/37 G01
0.01Hz to 1Hz Peak-to-Peak Noise
Total Noise vs Source Resistance
Voltage Noise vs Temperature
5
4
3
2
1
0
1000
100
10
R
V
= ±15V
= 25°C
V
= ±15V
S
S
A
T
R
SOURCE RESISTANCE = 2R
AT 10Hz
AT 1kHz
AT 1kHz
AT 10Hz
RESISTOR
NOISE ONLY
1
0
20
40
60
80
100
0.1
1
10
100
–50
0
25
50
75 100 125
–25
SOURCE RESISTANCE (kΩ)
TEMPERATURE (°C)
TIME (SEC)
1007/37 G04
1007/37 G05
1007/37 G06
Wideband Voltage Noise
(0.1Hz to Frequency Indicated)
Current Noise vs Frequency
Voltage Noise vs Supply Voltage
10
5
4
3
2
1
0
10
1
T
A
= 25°C
3
1
AT 10Hz
AT 1kHz
MAXIMUM
0.1
0.01
TYPICAL
0.3
0.1
1/f CORNER = 120Hz
100
0
5
10
15
20
25
10
1k
10k
0.1
1
10
100
FREQUENCY (Hz)
BANDWIDTH (kHz)
SUPPLY VOLTAGE (±V)
1007/37 G07
1007/37 G08
1007/37 G09
5
LT1007/LT1037
TYPICAL PERFORMANCE CHARACTERISTICS
W
U
Voltage Gain vs Frequency
Voltage Gain, RL = 2k and 600Ω
Voltage Gain vs Supply Voltage
180
160
140
120
100
80
25
20
15
10
5
V
T
= ±15V
= 25°C
= 2k
S
T
= 25°C
A
R
L
= 2k
A
–1
0
R
L
R
= 2k
L
R
L
= 600Ω
–1
0
1
LT1037
LT1007
60
40
20
1
R
L
= 600Ω
V
= ±15V
= 25°C
S
A
0
T
0
–20
–15
–10
–5
OUTPUT VOLTAGE (V)
MEASURED ON TEKTRONIX 178 LINEAR IC TESTER
0
5
10
15
0.01 0.1
1
10 100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
0
5
10
15
20
25
SUPPLY VOLTAGE (±V)
1007/37 G10
1007/37 G11
1007/37 G12
Voltage Gain vs Load Resistance
Warm-Up Drift
Voltage Gain vs Temperature
25
20
15
10
5
10
8
25
20
15
10
5
V
= ±15V
= 25°C
S
A
V
= ±15V
= 25°C
S
A
T
T
R
R
= 2k
= 1k
L
L
6
METAL CAN (H) PACKAGE
R
= 600Ω
L
4
V
V
V
A
R
= ±15V
S
= ±10V
DUAL-IN-LINE PACKAGE
PLASTIC (N8) OR CERDIP (J8)
OUT
OUT
2
= ±8V FOR
T
≥ 100°C AND
= 600Ω
L
0
–50
0
0
0
1
2
3
4
5
0.1
0.3
1
3
10
0
25
50
75 100 125
–25
LOAD RESISTANCE (kΩ)
TEMPERATURE (°C)
TIME AFTER POWER ON (MINUTES)
1007/37 G13
1007/37 G15
1007/37 G14
Long Term Stability of Four
Representative Units
Offset Voltage Drift with Temperature
of Representative Units
Supply Current vs Supply Voltage
50
40
4
3
2
1
0
10
5
V
S
= ±15V
LT1007/LT1037
LT1007A/LT1037A
30
125°C
25°C
20
10
0.2µV/MONTH
–55°C
0
0
–10
–20
–30
–40
–50
–5
–10
0.2µV/MONTH
TREND LINE
10
SUPPLY VOLTAGE (±V)
50
75 100 125
0
5
15
20
–50
0
25
–25
0
2
4
6
8
10
TEMPERATURE (°C)
TIME (MONTHS)
1007/37 G18
1007/37 G17
1007/37 G16
6
LT1007/LT1037
W
U
TYPICAL PERFORMANCE CHARACTERISTICS
Common Mode Rejection vs
Frequency
Common Mode Limit vs
Temperature
Input Bias Current Over the
Common Mode Range
+
V
140
120
100
80
20
15
V
V
T
= ±15V
= ±10V
S
CM
A
–1
–2
–3
–4
DEVICE WITH POSITIVE
INPUT CURRENT
+
= 25°C
V
= 3V TO 20V
10
5
V
T
= ±15V
= 25°C
S
A
20V
3nA
R
CM
=
≈ 7G
0
LT1037
LT1007
+4
+3
+2
+1
–5
–10
–15
–20
–
DEVICE WITH NEGATIVE
INPUT CURRENT
V
= –3V TO –20V
60
–
40
V
3
4
5
6
7
10
10
10
FREQUENCY (Hz)
10
10
–50
0
25
50
75 100 125
–15
–10
–5
0
5
10
15
–25
COMMON MODE INPUT VOLTAGE (V)
TEMPERATURE (°C)
1007/37 G19
1007/37 G20
1007/37 G21
Input Bias Current vs
Temperature
Input Offset Current vs
Temperature
Output Swing vs Load Resistance
15
12
9
60
50
40
30
20
10
0
50
40
30
20
10
0
V
= ±15V
V
S
= ±15V
S
POSITIVE
SWING
NEGATIVE
SWING
LT1007M
LT1037M
6
LT1007M
LT1037M
3
V
= ±15V
= 25°C
S
A
LT1007AM
LT1037AM
LT1007AM
LT1037AM
T
0
–25
25
100
125
–75 –50
0
50 75
100
300
1k
3k
10k
–50
–25
25 50 75 100
125
0
TEMPERATURE (°C)
LOAD RESISTANCE (Ω)
TEMPERATURE (°C)
1007/37 G24
1007/37 G23
1007/37 G22
Output Short-Circuit Current
vs Time
PSRR vs Frequency
Closed-Loop Output Impedance
100
10
50
40
160
140
120
100
80
T
= 25°C
V
= ±15V
= 25°C
= 1mA
A
S
A
T
I
–55°C
30
OUT
25°C
20
A
V
= 1000
A
V
= 1000
125°C
1
10
NEGATIVE
SUPPLY
V
S
= ±15V
0
0.1
–10
–20
–30
–40
–50
60
A
= 1
A
V
= 5
V
125°C
POSITIVE
40
SUPPLY
0.01
0.001
25°C
LT1007
LT1037
20
–55°C
0
3
5
7
2
4
6
8
10
10
10
10
100
1k
10k
100k
1M
1
10 10
10
10
10
0
1
2
3
FREQUENCY (Hz)
TIME FROM OUTPUT SHORT TO GROUND (MINUTES)
FREQUENCY (Hz)
1007/37 G26
1195 G25
1007/37 G27
7
LT1007/LT1037
W
U
TYPICAL PERFORMANCE CHARACTERISTICS
LT1037 Phase Margin, Gain
Bandwidth Product, Slew Rate vs
Temperature
LT1037 Small-Signal
Transient Response
LT1037 Large-Signal Response
70
60
50
20
15
10
V
C
= ±15V
= 100pF
S
L
10V
0V
50mV
0V
70
60
50
PHASE MARGIN
GBW
–10V
–50mV
SLEW
0
AVCL = 5
AVCL = 5
V
S = ±15V
VS = ±15V
1007/37 G29
CL = 15pF
1007/37 G28
–50
25
50
75 100 125
–25
TEMPERATURE (°C)
1007/37 G30
LT1007 Phase Margin, Gain
Bandwidth Product, Slew Rate vs
Temperature
LT1037 Gain, Phase Shift
vs Frequency
LT1007 Gain, Phase Shift
vs Frequency
90
70
60
50
3
50
40
30
20
10
0
90
40
30
20
10
0
V
= ±15V
= 25°C
= 100pF
V
= ±15V
= 25°C
= 100pF
V
C
= ±15V
= 100pF
S
A
L
S
A
L
S
L
100
110
120
130
140
150
160
170
180
190
100
110
120
130
140
150
160
170
180
190
T
T
C
C
PHASE MARGIN
9
8
7
PHASE
PHASE
GBW
GAIN
GAIN
SLEW
A
= 5
V
2
1
–10
0.1
1
10
100
50
–50
0
25
75 100 125
–25
0.1
1
10
100
FREQUENCY (MHz)
TEMPERATURE (°C)
FREQUENCY (MHz)
1007/37 G31
1007/37 G32
1007/37 G33
LT1007 Small-Signal
Transient Response
Maximum Undistorted Output
vs Frequency
LT1007 Large-Signal Response
28
V
= ±15V
= 25°C
S
A
T
24
20
16
12
8
5V
0V
50mV
0V
LT1007
LT1037
–5V
–50mV
AVCL = –1
AVCL = 1
4
V
S = ±15V
1007/37 G35
V
S = ±15V
CL = 15pF
1007/37 G34
0
1k
10k
100k
FREQUENCY (Hz)
1M
10M
1007/37 G36
8
LT1007/LT1037
U
W U U
APPLICATIONS INFORMATION
Offset Voltage and Drift
General
Thermocouple effects, caused by temperature gradients
across dissimilar metals at the contacts to the input
terminals, can exceed the inherent drift of the amplifier
unless proper care is exercised. Air currents should be
minimized, package leads should be short, the two input
leadsshouldbeclosetogetherandmaintainedatthesame
temperature.
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.
Offset Voltage Adjustment
The circuit shown to measure offset voltage is also used
as the burn-in configuration for the LT1007/LT1037, with
the supply voltages increased to ±20V (Figure 3).
TheinputoffsetvoltageoftheLT1007/LT1037anditsdrift
with temperature, are permanently trimmed at wafer
testing to a low level. However, if further adjustment of
V
OS is necessary, the use of a 10kΩ nulling potentiometer
50k*
15V
will not degrade drift with temperature. Trimming to a
value other than zero creates a drift of (VOS/300)µV/°C,
e.g., if VOS is adjusted to 300µV, the change in drift will be
1µV/°C (Figure 1).
–
2
7
6
LT1007
LT1037
100Ω*
V
OUT
+
3
V
= 1000V
OS
OUT
4
The adjustment range with a 10kΩ pot is approximately
±2.5mV.Iflessadjustmentrangeisneeded,thesensitivity
and resolution of the nulling can be improved by using a
smaller pot in conjunction with fixed resistors. The ex-
ample has an approximate null range of ±200µV
(Figure 2).
*RESISTORS MUST HAVE LOW
THERMOELECTRIC POTENTIAL
50k*
–15V
1007/37 F03
Figure 3. Test Circuit for Offset Voltage and
Offset Voltage Drift with Temperature
10k
15V
Unity-Gain Buffer Application (LT1007 Only)
1
When RF ≤ 100Ω and the input is driven with a fast, large-
signal pulse (>1V), the output waveform will look as
shown in the pulsed operation diagram (Figure 4).
–
2
3
8
7
6
LT1007
LT1037
OUTPUT
INPUT
+
4
During the fast feedthrough-like portion of the output, the
input protection diodes effectively short the output to the
inputandacurrent, limitedonlybytheoutputshort-circuit
protection, will be drawn by the signal generator. With
RF ≥ 500Ω, the output is capable of handling the current
requirements (IL ≤ 20mA at 10V) and the amplifier stays
in its active mode and a smooth transition will occur.
–15V
1007/37 F01
Figure 1. Standard Adjustment
1k
15V
4.7k
4.7k
1
R
F
–
2
3
8
7
6
–
+
LT1007
LT1037
OUTPUT
+
2.8V/µs
OUTPUT
4
LT1007
–15V
1007/37 F02
1007/37 F04
Figure 2. Improved Sensitivity Adjustment
Figure 4. Pulsed Operation
9
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.Asmallcapacitor(20pFto50pF)inparallelwithRF
will eliminate this problem.
electric effects in excess of a few nanovolts, which
would invalidate the measurements.
3. Sudden motion in the vicinity of the device can also
“feedthrough” to increase the observed noise.
A noise voltage density test is recommended when mea-
suring noise on a large number of units. A 10Hz noise
voltage density measurement will correlate well with a
0.1Hz to 10Hz peak-to-peak noise reading since both
results are determined by the white noise and the location
of the 1/f corner frequency.
Noise Testing
The 0.1Hz to 10Hz peak-to-peak noise of the LT1007/
LT1037 is measured in the test circuit shown (Figure 5a).
The frequency response of this noise tester (Figure 5b)
indicates that the 0.1Hz corner is defined by only one zero.
The test time to measure 0.1Hz to 10Hz noise should not
exceed ten seconds, as this time limit acts as an additional
zero to eliminate noise contributions from the frequency
band below 0.1Hz.
Current noise is measured in the circuit shown in Figure 6
and calculated by the following formula:
1/2
2
)
2
)
− 130nV
(
e
• 101
Measuring the typical 60nV peak-to-peak noise perfor-
mance of the LT1007/LT1037 requires special test
precautions:
(
no
i =
n
1MΩ 101
1. The device should be warmed up for at least five
minutes. As the op amp warms up, its offset voltage
changes typically 3µV due to its chip temperature
increasing 10°C to 20°C from the moment the power
suppliesareturnedon. Intheten-secondmeasurement
interval these temperature-induced effects can easily
exceed tens of nanovolts.
100k
100Ω
500k
500k
–
+
LT1007
LT1037
e
no
1007/37 F06
2. For similar reasons, the device must be well shielded
from air currents to eliminate the possibility of thermo-
Figure 6
0.1µF
100
90
80
70
60
50
40
30
100k
10Ω
–
*
2k
LT1007
+
22µF
LT1037
SCOPE
4.3k
+
LT1001
× 1
4.7µF
R
IN
= 1M
–
110k
2.2µF
VOLTAGE GAIN
= 50,000
100k
0.1µF
*DEVICE UNDER TEST
NOTE: ALL CAPACITOR VALUES ARE FOR
NONPOLARIZED CAPACITORS ONLY
24.3k
0.01
0.1
1
10
100
1007/37 F05a
FREQUENCY (Hz)
1007/37F05b
Figure 5b. 0.1Hz to 10Hz Peak-to-
Peak Noise Tester Frequency
Response
Figure 5a. 0.1Hz to 10Hz Noise Test Circuit
10
LT1007/LT1037
U
W U U
APPLICATIONS INFORMATION
Three regions can be identified as a function of source
resistance:
The LT1007/LT1037 achieve their low noise, in part, by
operatingtheinputstageat120µAversusthetypical10µA
of most other op amps. Voltage noise is inversely propor-
tional 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 fre-
quency(≈120Hz)minimizescurrentnoisetosomeextent.
(i) RS ≤ 400Ω. Voltage noise dominates
(ii) 400Ω ≤ RS ≤ 50k at 1kHz
Resistor noise
dominates
}
400Ω ≤ RS ≤ 8k at 10Hz
(iii) RS > 50k at 1kHz
RS > 8k at 10Hz
Current noise
dominates
}
In most practical applications, however, current noise will
not limit system performance. This is illustrated in the
Total Noise vs Source Resistance plot in the Typical
Performance Characteristics section, where:
Clearly the LT1007/LT1037 should not be used in region
(iii), where total system noise is at least six times higher
than the voltage noise of the op amp, i.e., the low voltage
noise specification is completely wasted.
Total Noise = [(voltage noise)2 + (current noise • RS)2 +
(resistor noise)2]1/2
U
TYPICAL APPLICATIONS
Gain Error vs Frequency
Closed-Loop Gain = 1000
Gain 1000 Amplifier with 0.01% Accuracy, DC to 5Hz
15k
20k
340k
1%
5% TRIM
1
TYPICAL
PRECISION
OP AMP
15V
7
365Ω
1%
–
2
3
0.1
0.01
LT1007
6
OUTPUT
LT1037
+
4
RN60C FILM RESISTORS
LT1037
INPUT
–15V
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 OP AMP MAY HAVE AN OPEN-LOOP
GAIN OF ONE MILLION WITH 500kHz BANDWIDTH. AS THE GAIN ERROR
PLOT SHOWS, THIS DEVICE IS CAPABLE OF 0.1% AMPLIFYING ACCURACY
UP TO 0.3Hz ONLY. EVEN INSTRUMENTATION RANGE SIGNALS CAN VARY
AT A FASTER RATE. THE LT1037’S “GAIN PRECISION-BANDWIDTH
PRODUCT” IS 200 TIMES HIGHER AS SHOWN.
CLOSED-LOOP GAIN
OPEN-LOOP GAIN
GAIN ERROR =
1
0.001
0.1
10
100
FREQUENCY (Hz)
1007/37 TA03
11
LT1007/LT1037
U
TYPICAL APPLICATIONS
Microvolt Comparator with Hysteresis
Precision Amplifier Drives 300Ω Load to ±10V
20k
5%
10k
TRIM
340k
1%
15V
365Ω
1%
100M
5%
7
15k
1%
3
2
–
+
2
3
INPUT
+
–
8
6
6
OUTPUT
LT1007
4
LT1007
365Ω
1%
15Ω
5%
–
+
2
3
15Ω
5%
6
OUTPUT
±10V
–15V
LT1037
POSITIVE FEEDBACK TO ONE OF THE NULLING TERMINALS
CREATES APPROXIMATELY 5µV OF HYSTERESIS.
OUTPUT CAN SINK 16mA.
R
L
300Ω
INPUT OFFSET VOLTAGE IS TYPICALLY CHANGED LESS
INPUT
THAN 5µV DUE TO THE FEEDBACK.
1007/37 TA04
THE ADDITION OF THE LT1007 DOUBLES THE AMPLIFIER’S OUTPUT DRIVE
TO ±33mA. GAIN ACCURACY IS 0.02%, SLIGHTLY DEGRADED COMPARED
TO ABOVE BECAUSE OF SELF-HEATING OF THE LT1037 UNDER LOAD.
1007/37 TA05
Infrared Detector Preamplifier
15V
+
10Ω
10µF
100µF
1k
+
33Ω
CHOPPED DETECTOR
OUTPUT
2N2219A
+
100µF
15V
7
267Ω*
50mA
100µF
3
2
+
–
+
6
OUTPUT TO
DEMODULATOR
LT1007
392Ω*
PHOTOCONDUCTIVE
INFRARED DETECTOR
HgCdTe type
IR RADIATION
4
392k*
INFRA-RED ASSOCIATES, INC.
SYNCHRONOUS
–15V
OPTICAL
CHOPPER
13Ω AT 77°K
392Ω*
*1% METAL FILM
1007/37 TA08
12
LT1007/LT1037
U
TYPICAL APPLICATIONS
Phono Preamplifier
Tape Head Amplifier
0.01µF
4.99k
7.87k
6
0.01µF
316k
15V
100k
100Ω
–
+
2
3
7
0.033µF
100Ω
–
2
3
100pF
OUTPUT
LT1037
4
6
OUTPUT
LT1037
+
TAPE HEAD
INPUT
ALL RESISTORS METAL FILM
ALL RESISTORS METAL FILM
47k
–15V
1007/37 TA07
MAG PHONO
INPUT
1007/37 TA06
W
W
SI PLIFIED SCHE ATIC
8
1
+
V
7
Q4
450µA
750µA
Q3
Q5
240µA
Q7
Q9
3.4k
17k
3.4k
17k
Q28
Q8
1.2k 1.2k
–
130pF
C1
Q6 V
Q18
Q27
Q17
Q10
20Ω
750Ω
200Ω
Q19
Q20
–
Q25
V
OUTPUT
6
NONINVERTING
Q26
Q1A
INPUT (+)
Q2A
20Ω
3
Q1B Q2B
+
V
80pF
20pF
Q13
Q30
+
2
Q22
V
Q11
INVERTING
INPUT (–)
Q15
Q12
Q16
Q23
Q29
Q24
500µA
240µA
120µA
200Ω
200Ω
6k
6k 50Ω
–
C1 = 110pF FOR LT1007
C1 = 12pF FOR LT1037
V
4
1007/37 SD
13
LT1007/LT1037
U
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
H Package
8-Lead TO-5 Metal Can (0.200 PCD)
(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)
REFERENCE
PLANE
SEATING
PLANE
GAUGE
PLANE
0.500 – 0.750
(12.700 – 19.050)
0.010 – 0.045*
(0.254 – 1.143)
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
*LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND 0.045" BELOW THE REFERENCE PLANE
0.016 – 0.024
**FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS
(0.406 – 0.610)
(2.794 – 4.064)
INSULATING
STANDOFF
H8(TO-5) 0.200 PCD 0595
J8 Package
8-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
0.405
(10.287)
MAX
CORNER LEADS OPTION
(4 PLCS)
0.005
(0.127)
MIN
6
5
4
8
7
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
0.025
(0.635)
RAD TYP
0.220 – 0.310
(5.588 – 7.874)
0.045 – 0.068
(1.143 – 1.727)
FULL LEAD
OPTION
1
2
3
0.200
(5.080)
MAX
0.300 BSC
(0.762 BSC)
0.015 – 0.060
(0.381 – 1.524)
0.008 – 0.018
(0.203 – 0.457)
0° – 15°
0.045 – 0.068
(1.143 – 1.727)
0.385 ± 0.025
(9.779 ± 0.635)
0.125
3.175
MIN
0.100 ± 0.010
0.014 – 0.026
(2.540 ± 0.254)
(0.360 – 0.660)
J8 0694
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS.
14
LT1007/LT1037
U
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
N8 Package
8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.400*
(10.160)
MAX
8
7
6
5
4
0.255 ± 0.015*
(6.477 ± 0.381)
1
2
3
0.130 ± 0.005
0.300 – 0.325
0.045 – 0.065
(3.302 ± 0.127)
(1.143 – 1.651)
(7.620 – 8.255)
0.065
(1.651)
TYP
0.009 – 0.015
(0.229 – 0.381)
0.125
(3.175)
MIN
0.005
(0.127)
MIN
0.015
+0.025
–0.015
(0.380)
MIN
0.325
+0.635
8.255
(
)
–0.381
0.100 ± 0.010
(2.540 ± 0.254)
0.018 ± 0.003
(0.457 ± 0.076)
N8 0695
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
7
5
8
6
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
1
3
4
2
0.010 – 0.020
(0.254 – 0.508)
× 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°– 8° TYP
0.016 – 0.050
0.406 – 1.270
0.050
(1.270)
BSC
0.014 – 0.019
(0.355 – 0.483)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
SO8 0695
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
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.
15
LT1007/LT1037
TYPICAL APPLICATIONS
U
Strain Gauge Signal Conditioner with Bridge Excitation
7.5V
5k
7
2.5V
3
2
+
–
6
LT1007
4
LT1009
–7.5V
REFERENCE
OUT
350Ω
BRIDGE
15V
7
3
2
+
–
6
OUTPUT
0V TO 10V
LT1007
301k*
ZERO
TRIM
10k
4
1µF
301k*
–15V
7.5V
7
GAIN
TRIM
50k
–
2
499Ω*
6
THE LT1007 IS CAPABLE OF PROVIDING EXCITATION CURRENT
DIRECTLY TO BIAS THE 350Ω BRIDGE AT 5V. WITH ONLY 5V ACROSS
THE BRIDGE (AS OPPOSED TO THE USUAL 10V) 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.
*RN60C FILM RESISTOR
LT1007
4
3
+
–7.5V
1007/37 TA09
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1028
Ultralow Noise Precision Op Amp
Lowest Noise 0.85mV/√Hz
0.002% THD, Max Noise 1.2mV/√Hz
Similar to LT1007
LT1115
Ultralow Noise, Low distortion Audio Op Amp
LT1124/LT1125
LT1126/LT1127
LT1498/LT1499
Dual/Quad Low Noise, High Speed Precision Op Amps
Dual/Quad Decompensated Low Noise, High Speed Precision Op Amps
Similar to LT1037
10MHz, 5V/µs, Dual/Quad Rail-to-Rail Input and Output
Precision C-LoadTM Op Amps
C-Load is a trademark of Linear Technology Corporation.
100737fa LT/TP 0297 5K REV A • PRINTED IN USA
16 Linear Technology Corporation
●
1630McCarthyBlvd., Milpitas, CA95035-7417 (408)432-1900
●
●
FAX: (408) 434-0507 TELEX: 499-3977 www.linear-tech.com
LINEAR TECHNOLOGY CORPORATION 1985
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