SA59131

·           –4V to 80V Wide Common-Mode Operate Range

·           Voltage-output, Current-sense Amplifier

·           Enhanced PWM Rejection

·           Excellent CMRR:

l   132dB DC CMRR

l   93dB AC CMRR at 50 kHz

·           High Accuracy:

l   Gain Error: 0.15% (Max)

l   Gain Drift: 2.5ppm/°C (Max)

·           Low Offset Voltage:

l   Offset Voltage: ±25μV (Max)

l   Offset Drift: 250nV/°C (Max)

·           High Bandwidth: 500kHz

·           Fixed Gain:

l   SA59131B: 25V/V

l   SA59131: 50V/V

l   SA59131D: 100V/V

·           Quiescent Current: 2.4mA (Max)

·           AEC-Q100 Grade 1 Qualified

·           Package: TSSOP8/ SOP8

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

The SA59131 is fixed-gain, high-speed, high precision, high-side or low-side bidirectional current-sense amplifiers 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 SA59131 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 HEV/EV's DC/DC converters, motor controls, and battery management systems.

The SA59131 utilizes zero-drift architecture. Its low input offset voltage (VOS) enables precise measurement of low-voltage drops. The devices operate from a single 2.7V to 5.5V power supply and draw 1.8mA (typ.) quiescent current. There fixed gains are available: 25 V/V, 50V/V and 100 V/V.

The device is available in TSSOP8 and SOP8 packages and is specified over operating temperature range of -40°C to 125°C. The devices are AEC−Q100 Grade 1 Qualified.