High Voltage, Low Noise Zero-Drift Operational Amplifier

The LTC2057 is a high voltage, low noise, zero-drift operational amplifier that offers precision DC performance over a wide supply range of 4.75V to 36V or 4.75V to 60V for the LTC2057HV. Offset voltage and 1/f noise are suppressed, allowing this amplifier to achieve a maximum offset voltage of 4μV and a DC to 10Hz input noise voltage of 200nVP-P (typ). The LTC2057’s self-calibrating circuitry results in low offset voltage drift with temperature, 0.015μV/°C (max), and zero-drift over time. The amplifier also features an excellent power supply rejection ratio (PSRR) of 160dB and a common mode rejection ratio (CMRR) of 150dB (typ).

The LTC2057 provides rail-to-rail output swing and an input common mode range that includes the V– rail (V– – 0.1V to V+ – 1.5V). In addition to low offset and noise, this amplifier features a 1.5MHz (typ) gain-bandwidth product and a 0.45V/μs (typ) slew rate.

Wide supply range, combined with low noise, low offset, and excellent PSRR and CMRR make the LTC2057 and LTC2057HV well suited for high dynamic-range test, measurement, and instrumentation systems.

Applications

* High Resolution Data Acquisition

* Reference Buffering

* Test and Measurement

* Electronic Scales

* Thermocouple Amplifiers

* Strain Gauges

* Low-Side Current Sense

* Automotive Monitors and Control

* Supply Voltage Range

* 4.75V to 36V (LTC2057)

* 4.75V to 60V (LTC2057HV)

* Offset Voltage: 4μV (Maximum)

* Offset Voltage Drift: 0.015μV/°C (Maximum, –40°C to 125°C)

* Input Noise Voltage

* 200nVP-P, DC to 10Hz (Typ)

* 11nV/√Hz, 1kHz (Typ)

* Input Common Mode Range: V– – 0.1V to V+ – 1.5V

* Rail-to-Rail Output

* Unity Gain Stable

* Gain Bandwidth Product: 1.5MHz (Typ)

* Slew Rate: 0.45V/μs (Typ)

* AVOL: 150dB (Typ)

* PSRR: 160dB (Typ)

* CMRR: 150dB (Typ)

* Shutdown Mode