The LMP8272 and LMP8277 are differential amplifiers with high common mode voltage and a gain of 14. They can detect, amplify, and filter small differential signals in the presence of high common mode voltages. The gain is fixed at 14, which is sufficient to drive an ADC to full scale. The amplifier consists of two stages: a pre-amplifier with a gain of +7 and a second stage amplifier with a gain of +2.
The document describes the LMP8272 and LMP8277, which are fixed-gain differential amplifiers designed to detect and amplify small signals in the presence of high common-mode voltages. These devices feature a fixed gain of 14, achieved through two internal stages with gains of +7 and +2 respectively.
| Gain | 14 |
|---|---|
| Input Offset Voltage | 1mV max |
| Common Mode Rejection Ratio (CMRR) | 80dB Min |
| Extended Common Mode Voltage Range | -5V to 36V |
| Supply Voltage | 4.5V to 5.5V |
| Bandwidth | 80KHz |
| Operating Temperature Range (Ambient) | -40°C to 125°C |
They are suitable for fuel injection control, low side driver configuration current sensing, and power management systems.
The typical supply current is 1mA.