LT1001_15 Datasheet, PDF (1/16 Pages) Linear Technology – Precision Operational Amplifier

FEATURES
s _{Guaranteed Low Offset Voltage}
LT1001AM
15µV max
LT1001C
60µV max
s _{Guaranteed Low Drift}
LT1001AM 0.6µV/°C max
LT1001C 1.0µV/°C max
s _{Guaranteed Low Bias Current}
LT1001AM
2nA max
LT1001C
4nA max
s _{Guaranteed CMRR}
LT1001AM
114dB min
LT1001C
110dB min
s _{Guaranteed PSRR}
LT1001AM
110dB min
LT1001C
106dB min
s _{Low Power Dissipation}
LT1001AM 75mW max
LT1001C
80mW max
s _{Low Noise 0.3µVP-P}
U
APPLICATIO S
s _{Thermocouple amplifiers}
s _{Strain gauge amplifiers}
s _{Low level signal processing}
s _{High accuracy data acquisition}
LT1001
Precision Operational
Amplifier
DESCRIPTIO
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
improved when compared to equivalent grades of com-
peting precision amplifiers.
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 10mA of load current. For similar perfor-
mance in a dual precision op amp, with guaranteed
matching specifications, see the LT1002. Shown below
is a platinum resistance thermometer application.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
+15
1.2k**
Linearized Platinum Resistance Thermometer
with ±0.025°C Accuracy Over 0 to 100°C
1MEG.**
R plat. ^†
1k = 0°C
330k*
20k
GAIN
TRIM
10k*
2_–
LT1001
3₊
6
10k*
1µf
2_–
LT1001
3₊
6
OUTPUT
LINEARITY
200Ω _TRIM
0 TO 10V =
0 TO 100°C
LM129
90k* 20k
OFFSET TRIM
10k*
* ULTRONIX 105A WIREWOUND
** 1% FILM
† _{PLATINUM RTD}
118MF (ROSEMOUNT, INC.)
‡ Trim sequence: trim offset (0°C = 1000.0Ω),
trim linearity (35°C = 1138.7Ω), trim gain
(100°C = 1392.6Ω). Repeat until all three
points are fixed with ±0.025°C.
1001 TA01
Typical Distribution
of Offset Voltage
V_S = ±15V, T_A = 25°C
200
954 UNITS
FROM THREE RUNS
150
100
50
0
–60 –40 –20 0 20 40 60
INPUT OFFSET VOLTAGE (µV)
1001 TA02
1001fb
1