The LTC®2057 is a high-voltage, low-noise, zero-drift operational amplifier that offers precision DC performance over a wide-supply range of 4.75 V to 36 V, or 4.75 V to 60 V for the LTC2057HV. Offset voltage and 1/f noise are suppressed, allowing this amplifier to achieve a maximum offset voltage of 4 μV and a DC to 10 Hz input noise voltage of 200 nVP-P (typ). The LTC2057’s self-calibrating circuitry results in low-offset voltage drift with temperature, 0.015 μV/°C (max), and zero-drift over time. The amplifier also features an excellent power supply rejection ratio (PSRR) of 160 dB and a common-mode rejection ratio (CMRR) of 150 dB (typ). The LTC2057 provides rail-to-rail output swing and an input common-mode range that includes the V– rail (V– – 0.1 V to V+ – 1.5 V). In addition to low-offset and noise, this amplifier features a 1.5 MHz (typ) gain-bandwidth product and a 0.45 V/μs (typ) slew rate. Wide-supply-range, combined with low-noise, low-offset, and excellent PSRR and CMRR make the LTC2057 and LTC2057HVHMSPBF well suited for high-dynamic-range test, measurement, and instrumentation systems. Evaluating Zero-Drift Amplifier Performance
Feature
- 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
Applications
- High Resolution Data Acquisition
- Reference Buffering
- Test and Measurement
- Electronic Scales
- Thermocouple Amplifiers
- Strain Gauges
- Low-Side Current Sense
- Automotive Monitors and Control
