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Linear Technology Electronic Components Datasheet


LT1002AC

Dual / Matched Precision Operational Amplifier



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LT1002AC pdf
LT1002
Dual, Matched Precision
Operational Amplifier
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 maching characteristics
s Low noise 0.35µV p-p
U
APPLICATIONS
s Thermocouple Amplifiers
s Strain Gauge Amplifiers
s Low level signal processing
s Medical instrumentation
s Precision dual limit threshold detection
s Instrumentation amplifiers
DESCRIPTION
The LT®1002 dual, matched precision operational amplifiers
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 commer-
cial grade (the LT1002C) have been spectacularly improved
compared to presently available devices.
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 specified 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 ad-
versely affecting noise or speed performance. A by-product of
lower dissipation is decreased 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 excel-
lent matching and individual amplifier specifications.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Strain Gauge Signal Conditioner with Bridge Excitation
+15V
8.2k
2.0K*
LM329
4+
1/2LT1002
4.99k* 3
13 2k
IN4148
350BRIDGE
+15V
1005W
2N2219
REFERENCE OUT
TO MONITORING
A/D CONVERTER
3+
6
* 10k LT1001
301k ZERO 2
1µF
10
1/2LT1002
11 +
IN4148
6 2k
2N2907
100
5W
–15V
GAIN
TRIM
*RN60C FILM RESISTORS
0 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
1



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LT1002AC pdf
LT1002
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (Note 6)......................................... ±22V
Differential Input Voltage ...................................... ±30V
Input Voltage Equal to Supply Voltage
Output Short Circuit Duration ......................... Indefinite
Operating Temperature Range
LT1002AM/LT1002M ....................... – 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)
J PACKAGE
14 PIN HERMETIC
N PACKAGE
14 PIN PLASTIC
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 6)
ORDER
PART NO.
LT1002AMJ
LT1002MJ
LT1002ACJ
LT1002CJ
LT1002ACN
LT1002CN
OFFSET
VOLTAGE
MAX
at 25°C
60µV
100µV
60µV
100µV
60µV
100µV
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 1
Notes 2 and 3
0.1Hz to 10Hz (Note 2)
fO = 10Hz (Note 5)
fO = 1000Hz (Note 2)
RL 2k, VO = ±12V
RL 1k, VO = ±10V
VCM = ±13V
VS = ±3V to ±18V
Note 4
RL 2k
RL 1k
RL 2k(Note 4)
Note 4
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
2



Part Number LT1002AC
Description Dual / Matched Precision Operational Amplifier
Maker Linear Technology - Linear Technology
Total Page 16 Pages
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