·           -4V to 80V Wide Common-Mode Operation Range

Voltage-Output, Current-Sense Amplifier

·           Enhanced PWM Rejection

·           Excellent CMRR:

l   132dB DC CMRR

l   93dB AC CMRR at 50kHz

·           High Accuracy:

l   Gain Error: 0.15% (Max)

l   Gain Drift: 2.5ppm/°C (Max)

·           Low Offset Voltage:

l   Offset Voltage: ±22μV (Max)

l   Offset Drift: 250nV/°C (Max)

·           High Bandwidth: 550kHz

·           Fixed Gain:

l   50V/V (SQ52131CHMP/SQ52131FAP)

l   200V/V (SQ52131EFAP)

·           Quiescent Current: 2.4mA (Max)

·           Package: TSSOP8/ SOP8

·           MSL Rating: MSL1(TSSOP8)/MSL3(SOP8)

The SQ52131x is fixed-gain, high-speed, high precision, high-side or low-side bidirectional current-sense amplifier with a voltage output. It operates over a wide common-mode voltage range of -4V to 80V, independent of the supply voltage. The negative common-mode voltage allows the device to operate below ground. Enhanced PWM rejection makes the SQ52131x suitable for current sensing and overcurrent protection in switching systems with large common-mode voltage transients (high ΔV/Δt) at the device's inputs, such as motor control, DC/DC converters, and battery management systems.

The SQ52131x utilizes zero-drift architecture. Its low input offset voltage (VOS) enables precise measurement of low-voltage drops. The device operates from a single 2.7V to 5.5V power supply and draws 1.8mA (typ.) quiescent current.

The device is available in TSSOP8 and SOP8 packages and is specified over the extended industrial temperature range of -40°C to 125°C.