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LT1002CN#PBF

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1
LT1002
1002fb
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
Dual, Matched Precision
Operational Amplifier
Strain Gauge Signal Conditioner with Bridge Excitation
–
+
LT1001
3
10
4
11
13
6
2k*
8.2k
LM329
15V
2
3
6
1002 TA01
2k
4.99k*
2k
–15V
*RN60C FILM RESISTORS
15V
IN4148
350Ω BRIDGE
2N2219
REFERENCE OUT
TO MONITORING
A/D CONVERTER
IN4148
100Ω 5W
100Ω
5W
10k
ZERO
1µF
340k*
0V TO 10V
OUT
301k*
1.1k*
2N2907
–
+
–
+
1/2
LT1002
1/2
LT1002
GAIN
TRIM
INPUT OFFSET VOLTAGE MATCH (µV)
–100
NUMBER OF UNITS
70
60
50
40
30
20
10
0
–80
0
40
1002 TA02
–20
80
100
–60 –40
20 60
V
S
= ±15V
T
A
= 25°C
287 UNITS TESTED
Distribution of Offset Voltage Match
■
Thermocouple Amplifiers
■
Strain Gauge Amplifiers
■
Low level signal processing
■
Medical instrumentation
■
Precision dual limit threshold detection
■
Instrumentation amplifiers
■
Guaranteed
low offset voltage
LT1002A 60µV max
LT1002 100µV max
■
Guaranteed
offset voltage match
LT1002A 40µV max
LT1002 80µV max
■
Guaranteed
low drift
LT1002A 0.9µV/°C max
LT1002 1.3µV/°C max
■
Guaranteed
CMRR
LT1002A 110dB min
LT1002 110dB min
■
Guaranteed
channel separation
LT1002A 132dB min
LT1002 130dB min
■
Guaranteed
matching characteristics
■
Low noise 0.35µV
P-P
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.
, LTC and LT are registered trademarks of Linear Technology Corporation
2
LT1002
1002fb
LT1002AM/LT1002AC LT1002M/LT1002C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage (Note 2) 20 60 25 100 µV
∆V
OS
Long Term Input Offset Voltage
∆Time
Stability (Notes 3 and 4) 0.3 1.5 0.4 2.0 µV/month
I
OS
Input Offset Current 0.3 2.8 0.4 4.2 nA
I
B
Input Bias Current ±0.6 ±3.0 ±0.7 ±4.5 nA
e
n
Input Noise Voltage 0.1Hz to 10Hz (Note 3) 0.35 0.7 0.38 0.75 µV
p-p
e
n
Input Noise Voltage Density f
O
= 10Hz (Note 6) 10.3 20.0 10.5 20.0
f
O
= 1000Hz (Note 3) 9.6 11.5 9.8 12.0 nV√Hz
A
VOL
Large Signal Voltage Gain R
L
≥ 2kΩ, V
O
= ±12V 400 800 350 800
V/mV
R
L
≥ 1kΩ, V
O
= ±10V 250 500 220 500
CMRR Common Mode Rejection Ratio V
CM
= ±13V 110 126 110 126 dB
PSRR Power Supply Rejection Ratio V
S
= ±3V to ±18V 108 123 105 123 dB
R
in
Input Resistance Differential Mode (Note 5) 20 100 13 80 MΩ
Input Voltage Range ±13 ±14 ±13 ±14 V
V
OUT
Maximum Output Voltage Swing R
L
≥ 2kΩ±13 ±14 ±13 ±14 V
R
L
≥ 1kΩ±12 ±13.5 ±12 ±13.5
SR Slew Rate R
L
≥ 2kΩ (Note 5) 0.1 0.25 0.1 0.25 V/µs
GBW Gain Bandwidth Product (Note 5) 0.4 0.8 0.4 0.8 MHz
P
d
Power Dissipation No load 46 75 48 85
mW
per amplifier No load, V
S
= ±3V 4 7 4 8
ABSOLUTE MAXIMUM RATINGS
W
WW
U
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
W
U
U
1
2
3
4
5
6
7
TOP VIEW
N PACKAGE
14 PIN PLASTIC
14
13
12
11
10
9
8
NULL (A)
NULL (A)
–IN (A)
+IN (A)
V– (B)
OUT (B)
V+ (B)
V+ (A)
OUT (A)
V– (A)
+IN (B)
–IN (B)
NULL (B)
NULL (B)
–
–
+
+
A
B
LT1002ACN
LT1002CN
OFFSET
VOLTAGE
MAX
at 25°C
ORDER
PART NO.
60µV
100µV
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)
ELECTRICAL CHARACTERISTICS, I DIVIDUAL A PLIFIERS
UW
V
S
= ±15V, T
A
= 25°C, unless otherwise noted
Consult LTC Marketing for parts specified with wider operating temperature ranges.
(Note 1)
LT1002AMJ
LT1002MJ
LT1002ACJ
LT1002CJ
60µV
100µV
60µV
100µV
OBSOLETE PACKAGE
T
JMAX
= 125°C, θ
JA
= 100°C/W
J PACKAGE
14 PIN HERMETIC
T
JMAX
= 125°C, θ
JA
= 100°C/W
Consider the N Package for Alternate Source
3
LT1002
1002fb
ELECTRICAL CHARACTERISTICS, I DIVIDUAL A PLIFIERS
UW
LT1002AM LT1002M
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage (Note 2) ● 30 150 45 230 µV
∆V
OS
Average Input Offset Voltage Drift ● 0.2 0.9 0.3 1.3 µV/°C
∆Temp
I
OS
Input Offset Current ● 0.8 5.6 1.2 8.5 nA
I
B
Input Bias Current ● ±1.0 ±6.0 ±1.5 ±9.0 nA
A
VOL
Large Signal Voltage Gain R
L
≥ 2kΩ, V
O
= ±10V ● 300 700 200 700 V/mV
CMRR Common Mode Rejection Ratio V
CM
= ±13V ● 106 122 104 120 dB
PSRR Power Supply Rejection Ratio V
S
= ±3V to ±18V ● 102 117 96 117 dB
Input Voltage Range ● ±13 ±14 ±13 ±14 V
V
OUT
Output Voltage Swing R
L
≥ 2kΩ ● ±12.5 ±13.5 ±12.0 ±13.5 V
P
d
Power Dissipation No load ● 55 90 60 100 mW
per amplifier
LT1002AC LT1002C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage (Note 2) ● 20 100 30 160 µV
∆V
OS
Average Input Offset Voltage Drift ● 0.2 0.9 0.3 1.3 µV/°C
∆Temp
I
OS
Input Offset Current ● 0.5 4.2 0.6 5.7 nA
I
B
Input Bias Current ● ±0.7 ±4.5 ±1.0 ±6.0 nA
A
VOL
Large Signal Voltage Gain R
L
≥ 2kΩ, V
O
= ±10V ● 350 750 250 750 V/mV
CMRR Common Mode Rejection Ratio V
CM
= ±13V ● 108 124 106 123 dB
PSRR Power Supply Rejection Ratio V
S
= ±3V to ±18V ● 105 120 100 120 dB
Input Voltage Range ● ±13 ±14 ±13 ±14 V
V
OUT
Output Voltage Swing R
L
≥ 2kΩ ● ±12.5 ±13.8 ±12.5 ±13.8 V
P
d
Power Dissipation No Load ● 50 85 55 90 mW
per amplifier
The ● denotes the specifications which apply over the temperature range –55°C ≤ T
A
≤ 125°C, V
S
= ±15V,unless otherwise noted.
The ● denotes the specifications which apply over the temperature range 0°C ≤ T
A
≤ 70°C, V
S
= ±15V, unless otherwise noted.
LT1002AM/AC LT1002M/C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Input Offset Voltage Match – 15 40 – 25 80 µV
I
B
+
Average Non-Inverting Bias
Current – ±0.6 ±3.5 – ±0.7 ±4.8 nA
I
OS
+
Non-Inverting Offset Current – 0.6 3.5 – 0.7 6.0 nA
I
OS
–
Inverting Offset Current – 0.6 3.5 – 0.7 6.0 nA
∆CMRR Common Mode Rejection Ratio
Match V
CM
= ±13V 110 132 – 108 132 – dB
∆PSRR Power Supply Rejection Ratio
Match V
S
= ±3V to ±18V 108 130 – 102 128 – dB
Channel Seperation f ≤ 10Hz (Note 5) 132 148 – 130 146 – dB
ATCHI G CHARACTERISTICS
UW
V
S
= ±15V, T
A
= 25°C, unless otherwise noted.
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LT1002CN#PBF

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Manufacturer:
Analog Devices Inc.
Description:
Precision Amplifiers 2x, Matched Prec Op Amp
Lifecycle:
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