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Linear Technology Electronic Components Datasheet


LT1002

Dual / Matched Precision Operational Amplifier



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LT1002 pdf
FEATURES
s Guaranteed low offset voltage
LT1002A
60µV max
LT1002
100µV max
s Guaranteed offset voltage match
LT1002A
40µV max
LT1002
80µV max
s Guaranteed low drift
LT1002A 0.9µV/°C max
LT1002 1.3µV/°C max
s Guaranteed CMRR
LT1002A
110dB min
LT1002
110dB min
s Guaranteed channel separation
LT1002A
132dB min
LT1002
130dB min
s Guaranteed matching characteristics
s Low noise 0.35µVP-P
U
APPLICATIO S
s Thermocouple Amplifiers
s Strain Gauge Amplifiers
s Low level signal processing
s Medical instrumentation
s Precision dual limit threshold detection
s Instrumentation amplifiers
, LTC and LT are registered trademarks of Linear Technology Corporation
LT1002
Dual, Matched Precision
Operational Amplifier
DESCRIPTIO
The LT®1002 dual, matched precision operational ampli-
fiers combine excellent individual amplifier performance
with tight matching and temperature tracking between
amplifiers.
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 and their
matching. Consequently, the specifications of even the
low cost commercial grade (LT1002C) have been spec-
tacularly improved compared to presently available de-
vices.
Essentially, the input offset voltage of all units is less than
80µV, and matching between amplifiers is consistently
beter than 60µV (see distribution plot below). Input bias
and offset currents, channel separation, common mode
and power suply rejections of the LT1002C are all speci-
fied at levels which were previsouly attainable only on very
expensive, selected grades of other dual devices. Power
dissipation is nearly halved compared to the most popular
precision duals, without adversely affecting noise or speed
performance. A by-product of lower dissipation is de-
creased warm-up drift. For even better performance in a
single precision op amp, refer to the LT1001 data sheet. A
bridge signal conditioning application is shown below.
This circuit illustrates the requirement for both excellent
matching and individual amplifier specifications.
TYPICAL APPLICATIO
15V
8.2k
2k*
LM329
Strain Gauge Signal Conditioner with Bridge Excitation
4.99k*
4+
1/2
LT1002
3
13 2k
IN4148
15V
1005W
2N2219
REFERENCE OUT
TO MONITORING
A/D CONVERTER
350BRIDGE
301k*
3+
10k LT1001
ZERO 2
6
1µF
10
1/2
LT1002
11 +
IN4148
6 2k
2N2907
100
5W
–15V
GAIN
TRIM
*RN60C FILM RESISTORS
0V TO 10V
OUT
340k*
1.1k*
1002 TA01
Distribution of Offset Voltage Match
70
VS = ±15V
60 TA = 25°C
287 UNITS TESTED
50
40
30
20
10
0
–100 –80 –60 –40 –20 0 20 40 60 80 100
INPUT OFFSET VOLTAGE MATCH (µV)
1002 TA02
1002fb
1



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LT1002 pdf
LT1002
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage (Note 7) ........................................ ±22V
Differential Input Voltage ...................................... ±30V
Input Voltage Equal to Supply Voltage
Output Short Circuit Duration ......................... Indefinite
Operating Temperature Range
LT1002AM/LT1002M (OBSOLETE) .. – 55°C to 125°C
LT1002AC/LT1002C ............................... 0°C to 70°C
Storage Temperature Range
All Grades ......................................... – 65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................. 300°C
PACKAGE/ORDER INFORMATION
NULL (A) 1
NULL (A) 2
–IN (A) 3
+IN (A) 4
V– (B) 5
OUT (B) 6
V+ (B) 7
TOP VIEW
A
+
+
B
14 V+ (A)
13 OUT (A)
12 V– (A)
11 +IN (B)
10 –IN (B)
9 NULL (B)
8 NULL (B)
ORDER
PART NO.
LT1002ACN
LT1002CN
OFFSET
VOLTAGE
MAX
at 25°C
60µV
100µV
N PACKAGE
14 PIN PLASTIC
TJMAX = 125°C, θJA = 100°C/W
NOTE: Device may be operated even if insertion
is reversed; this is due to inherent symmetry of
pin locations of amplifiers A and B. (Note 7)
LT1002AMJ
J PACKAGE
14 PIN HERMETIC
TJMAX = 125°C, θJA = 100°C/W
LT1002MJ
LT1002ACJ
LT1002CJ
OBSOLETE PACKAGE
Consider the N Package for Alternate Source
60µV
100µV
60µV
100µV
Consult LTC Marketing for parts specified with wider operating temperature ranges.
UW
ELECTRICAL CHARACTERISTICS, I DIVIDUAL A PLIFIERS
VS = ±15V, TA = 25°C, unless otherwise noted
SYMBOL
VOS
VOS
Time
IOS
IB
en
en
PARAMETER
Input Offset Voltage
Long Term Input Offset Voltage
Stability
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Voltage Density
AVOL Large Signal Voltage Gain
CMRR
PSRR
Rin
VOUT
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Input Resistance Differential Mode
Input Voltage Range
Maximum Output Voltage Swing
SR Slew Rate
GBW Gain Bandwidth Product
Pd Power Dissipation
per amplifier
CONDITIONS
(Note 2)
(Notes 3 and 4)
0.1Hz to 10Hz (Note 3)
fO = 10Hz (Note 6)
fO = 1000Hz (Note 3)
RL 2k, VO = ±12V
RL 1k, VO = ±10V
VCM = ±13V
VS = ±3V to ±18V
(Note 5)
RL 2k
RL 1k
RL 2k(Note 5)
(Note 5)
No load
No load, VS = ±3V
LT1002AM/LT1002AC
MIN TYP MAX
20 60
LT1002M/LT1002C
MIN TYP MAX
25 100
UNITS
µV
400
250
110
108
20
± 13
± 13
± 12
0.1
0.4
0.3
0.3
±0.6
0.35
10.3
9.6
800
500
126
123
100
±14
±14
±13.5
0.25
0.8
46
4
1.5
2.8
±3.0
0.7
20.0
11.5
75
7
350
220
110
105
13
± 13
± 13
± 12
0.1
0.4
0.4
0.4
±0.7
0.38
10.5
9.8
800
500
126
123
80
± 14
± 14
± 13.5
0.25
0.8
48
4
2.0 µV/month
4.2 nA
±4.5 nA
0.75 µVp-p
20.0
12.0 nVHz
V/mV
dB
dB
M
V
V
V/µs
MHz
85 mW
8
1002fb
2



Part Number LT1002
Description Dual / Matched Precision Operational Amplifier
Maker Linear Technology - Linear Technology
Total Page 16 Pages
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