The SGM621B is a high accuracy, high voltage instrumentation amplifier, which is designed to set any gain from 1 to 10000 with one external resistor. The device works well in battery-powered applications due to the low power consumption of 1.3mA typical quiescent current. The SGM621B provides SOIC-8, MSOP-8 and TDFN-3×3-8L packages which are much smaller than discrete classical-three-OPAs circuits.
The SGM621B provides 120ppm (MAX) non-linearity and 150μV (MAX) low input offset voltage. The device also features low noise, low bias current and low power. The combination of these characteristics makes it a good choice for applications requiring excellent DC performance.
The SGM621B offers 6nV/√Hz 300fA/√Hz low input voltage noise, input current noise at 1kHz, and 0.4μVP-P in the 0.1Hz to 10Hz band. It is suitable for pre-amplifier applications. The 10μs settling time to 0.01% makes SGM621B appropriate for multiplexed applications.
The SGM621B is available in Green SOIC-8 (please contact SGMICRO to request), MSOP-8 and TDFN-3×3-8L (please contact SGMICRO to request) packages. It is specified over the extended -40℃ to +125℃ temperature range.
- Single External Resistor Gain Set (Set Gain from 1 to 10000)
- Input Offset Voltage: 150μV (MAX)
- Input Bias Current: 15nA (TYP)
- Common Mode Rejection Ratio: 105dB (TYP) (G = 10)
- Input Voltage Noise: 6nV/√Hz at 1kHz
- 0.1Hz to 10Hz Voltage Noise: 0.4μVP-P
- Bandwidth: 140kHz (G = 100)
- Settling Time to 0.01%: 10μs (G = 100)
- Rail-to-Rail Output
- Support Single or Dual Power Supplies: 4.6V to 36V or ±2.3V to ±18V
- Low Power Supply Current: 1.3mA (TYP)
- -40℃ to +125℃ Operating Temperature Range
- Available in Green SOIC-8, MSOP-8 and TDFN-3×3-8L Packages
Precision Current Measurement
Pressure Measurement
