Datasheet LTC1050 (Analog Devices)

LTC1050 Precision Zero-Drift Operational Amplifier with Internal Capacitors
U FEATURES DESCRIPTIO
■ No External Components Required The LTC®1050 is a high performance, low cost zero-drift ■ Noise Tested and Guaranteed operational amplifier. The unique achievement of the ■ Low Aliasing Errors LTC1050 is that it integrates on-chip the two sample-and- ■ Maximum Offset Voltage: 5µV hold capacitors usually required externally by other chop- ■ Maximum Offset Voltage Drift: 0.05µV/°C per amplifiers. Further, the LTC1050 offers better com- ■ Low Noise: 1.6µVP-P (0.1Hz to 10Hz) bined overall DC and AC performance than is available ■ Minimum Voltage Gain: 130dB from other chopper stabilized amplifiers with or without ■ Minimum PSRR: 125dB internal sample-and-hold capacitors. ■ Minimum CMRR: 120dB The LTC1050 has an offset voltage of 0.5µV, drift of ■ Low Supply Current: 1mA 0.01µV/°C, DC to 10Hz, input noise voltage of 1.6µV ■ Single Supply Operation: 4.75V to 16V P-P and a typical voltage gain of 160dB. The slew rate of 4V/µs ■ Input Common Mode Range Includes Ground and a gain bandwidth product of 2.5MHz are achieved with ■ Output Swings to Ground only 1mA of supply current. ■ Typical Overload Recovery Time: 3ms Overload recovery times from positive and negative satu-
U APPLICATIO S
ration conditions are 1.5ms and 3ms respectively, which represents an improvement of about 100 times over chop- ■ Thermocouple Amplifiers per amplifiers using external capacitors. Pin 5 is an optional ■ Electronic Scales external clock input, useful for synchronization purposes. ■ Medical Instrumentation ■ Strain Gauge Amplifiers The LTC1050 is available in standard 8-pin metal can, ■ High Resolution Data Acquisition plastic and ceramic dual-in-line packages as well as an ■ DC Accurate RC Active Filters SO-8 package. The LTC1050 can be an improved plug-in , LTC and LT are registered trademarks of Linear Technology Corporation. replacement for most standard op amps.
U TYPICAL APPLICATIO High Performance, Low Cost Instrumentation Amplifier Noise Spectrum
5V 160 4 140 5V Hz) √ 1/2 LTC1043 120 3 7 7 8 + 6 100 LTC1050 VOUT 2 80 11 – 4 DIFFERENTIAL C 60 S CH INPUT 1µF 1µF – 5V 1µF 40 12 VOLTAGE NOISE DENSITY (nV/ 20 R1 R2 13 14 0 1050 TA01 10 100 1k 10k 100k FREQUENCY (Hz) 16 17 CMRR > 120dB AT DC 0.01 1050 TA02 µF CMRR > 120dB AT 60Hz DUAL SUPPLY OR SINGLE 5V GAIN = 1 + R2/R1 VOS = 5µV – 5V COMMON MODE INPUT VOLTAGE EQUALS THE SUPPLIES 1050fb 1