• Voltage-output, Current-sense Amplifier
• –4V to 80V Wide Common-Mode Operate Range
• Enhanced PWM Rejection
• Excellent CMRR:

--132dB DC CMRR

--93dB AC CMRR at 50 kHz

• High Accuracy:

--Gain Error: 0.15% (Maximum)

--Gain Drift: 2.5ppm/℃ (Maximum)

• Low Offset Voltage:

--Offset Voltage: ±22μV (Maximum)

--Offset Drift: 250nV/℃ (Maximum)

• High Bandwidth: 550kHz
• Fixed Gain: 50V/V
• Quiescent Current: 2.4mA (Maximum)
• Package: TSSOP8

The SQ52131 is a fixed-gain, high-speed, high precision, high-side or low-side, bidirectional current-sense amplifier with voltage-output. The SQ52131 can operate over a wide common-mode voltage range from –4V to 80V, which is independent of the supply voltage. The negative common-mode voltage allows the device to operate below ground. Moreover, the enhanced PWM rejection is suitable for current sensing and over-current protection in switching systems that have large common-mode voltage transients (high ΔV/Δt) at device's inputs, such as motor control, DC/DC converter and battery management systems.

The SQ52131 uses zero-drift architecture. The low input offset voltage (VOS) allows the device to measure the low-voltage drop very accurately. The SQ52131 is designed to operate from a single 2.7V to 5.5V power supply and draw 1.8mA (typ.) quiescent current. 

The device is provided in a TSSOP8 package and are specified over the extended industrial temperature range of -40°C to 125°C