LT1001
Precision Operational
Amplifier
U
FEATURES
DESCRIPTION
The LT®1001 significantly advances the state-of-the-
art of precision operational amplifiers. In the design,
processing, and testing of the device, particular atten-
tion has been paid to the optimization of the entire
distribution of several key parameters. Consequently,
the specifications of the lowest cost, commercial tem-
perature device, the LT1001C, have been dramatically
improvedwhencomparedtoequivalentgradesofcom-
peting precision amplifiers.
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Guaranteed Low Offset Voltage
LT1001AM
LT1001C
Guaranteed Low Drift
LT1001AM
LT1001C
Guaranteed Low Bias Current
LT1001AM
LT1001C
Guaranteed CMRR
LT1001AM
LT1001C
Guaranteed PSRR
LT1001AM
LT1001C
Low Power Dissipation
LT1001AM
LT1001C
Low Noise 0.3µVP-P
15µV max
60µV max
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■
■
■
■
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0.6µV/°C max
1.0µV/°C max
2nA max
4nA max
Essentially, the input offset voltage of all units is less
than 50µV (see distribution plot below). This allows the
LT1001AM/883 to be specified at 15µV. Input bias and
offset currents, common-mode and power supply re-
jection of the LT1001C offer guaranteed performance
which were previously attainable only with expensive,
selected grades of other devices. Power dissipation is
nearly halved compared to the most popular precision
op amps, without adversely affecting noise or speed
performance. A beneficial by-product of lower dissipa-
tion is decreased warm-up drift. Output drive capability
of the LT1001 is also enhanced with voltage gain
guaranteed at 10 mA of load current. For similar perfor-
mance in a dual precision op amp, with guaranteed
matchingspecifications, seetheLT1002. Shownbelow
is a platinum resistance thermometer application.
, LTC and LT are registered trademarks of Linear Technology Corporation.
114dB min
110dB min
110dB min
106dB min
75mW max
80mW max
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APPLICATIONS
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Thermocouple amplifiers
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Strain gauge amplifiers
Low level signal processing
High accuracy data acquisition
Linearized Platinum Resistance Thermometer
Typical Distribution
of Offset Voltage
with ±0.025°C Accuracy Over 0 to 100°C
1MEG.**
+15
VS = ±15V, TA = 25°C
†
R plat.
20k
1kΩ = 0°C
330k*
GAIN
TRIM
954 UNITS
200
1.2k**
FROM THREE RUNS
10k*
2
3
1 µf
150
–
+
2
6
LT1001
–
6
10k*
LT1001
OUTPUT
100
3
LINEARITY
TRIM
0 TO 10V =
0 TO 100°C
+
200Ω
50
0
90k*
20k
10k*
LM129
OFFSET TRIM
–60 –40
–20
0
20
40
60
‡
*
ULTRONIX 105A WIREWOUND
Trim sequence: trim offset (°0C = 1000.0Ω),
trim linearity (°3C5= 1138.7Ω), trim gain
(1°0C0= 1392.6Ω). Repeat until all three
points are fixed wi±th0.025°C.
INPUT OFFSET VOLTAGE (MICROVOLTS)
** 1% FILM
†
1001 TA02
PLATINUM RTD
118MF (ROSEMOUNT, INC.)
1001 TA01
1