Datasheet LT1001 (Analog Devices)

LT1001 Precision Operational Amplifier
U FEATURES DESCRIPTIO
■ Guaranteed Low Offset Voltage The LT®1001 significantly advances the state-of-the- LT1001AM 15µV max art of precision operational amplifiers. In the design, LT1001C 60µV max processing, and testing of the device, particular atten- ■ Guaranteed Low Drift tion has been paid to the optimization of the entire LT1001AM 0.6µV/°C max distribution of several key parameters. Consequently, LT1001C 1.0µV/°C max the specifications of the lowest cost, commercial tem- ■ Guaranteed Low Bias Current perature device, the LT1001C, have been dramatically LT1001AM 2nA max improved when compared to equivalent grades of com- LT1001C 4nA max peting precision amplifiers. ■ Guaranteed CMRR Essentially, the input offset voltage of all units is less LT1001AM 114dB min than 50µV (see distribution plot below). This allows the LT1001C 110dB min LT1001AM/883 to be specified at 15µV. Input bias and ■ Guaranteed PSRR offset currents, common-mode and power supply re- LT1001AM 110dB min jection of the LT1001C offer guaranteed performance LT1001C 106dB min which were previously attainable only with expensive, ■ Low Power Dissipation selected grades of other devices. Power dissipation is LT1001AM 75mW max nearly halved compared to the most popular precision LT1001C 80mW max op amps, without adversely affecting noise or speed ■ Low Noise 0.3µVP-P performance. A beneficial by-product of lower dissipa-
U
tion is decreased warm-up drift. Output drive capability
APPLICATIO S
of the LT1001 is also enhanced with voltage gain guaranteed at 10mA of load current. For similar perfor- ■ Thermocouple amplifiers mance in a dual precision op amp, with guaranteed ■ Strain gauge amplifiers matching specifications, see the LT1002. Shown below ■ Low level signal processing is a platinum resistance thermometer application. ■ High accuracy data acquisition , LTC and LT are registered trademarks of Linear Technology Corporation.
U TYPICAL APPLICATIO Typical Distribution Linearized Platinum Resistance Thermometer of Offset Voltage with
±
0.025
°
C Accuracy Over 0 to 100
°
C VS =
±
15V, TA = 25
°
C
+15 1MEG.** R plat. † 1k = 0°C 330k* 20k 200 954 UNITS GAIN FROM THREE RUNS 1.2k** TRIM 150 10k* 2 – 1µf 6 2 LT1001 – 100 3 10k* 6 + LT1001 OUTPUT 3 LINEARITY NUMBER OF UNITS + 0 TO 10V = 200Ω TRIM 0 TO 100°C 50 90k* 20k LM129 10k* OFFSET TRIM 0 –60 –40 –20 0 20 40 60 INPUT OFFSET VOLTAGE (µV) * ULTRONIX 105A WIREWOUND ‡ Trim sequence: trim offset (0°C = 1000.0Ω), 1001 TA02 ** 1% FILM trim linearity (35°C = 1138.7Ω), trim gain † PLATINUM RTD (100°C = 1392.6Ω). Repeat until all three 118MF (ROSEMOUNT, INC.) 1001 TA01 points are fixed with ±0.025°C. 1001fb 1