DESCRIPTION

· The Si8941/46/47 are galvanically isolated delta-sigma modulators for accurate voltage level measurement.

· Ideal for current shunt resistor voltage measurement and sensor isolation from control systems.

· Features low noise, low error, and high precision for accurate system current measurement.

· Utilizes Skyworks proprietary isolation technology with up to 5.0 kVRMS withstand voltage per UL1577.

· Available in Automotive Grade for enhanced robustness and low defectivity in automotive applications.

FEATURES

· Low voltage differential input options: ±62.5 mV and ±250 mV.

· Modulator clock options: External up to 25 MHz (Si8941), 10 MHz internal (Si8946), 20 MHz internal (Si8947).

· Typical input offset: ±50 µV; typical gain error: ±0.05%.

· Excellent drift specifications: ±0.5 µV/°C offset drift, ±4 ppm/°C gain drift.

· 14-bit (ENOB) precision, 90 dB SNR, –97 dB THD.

· High common-mode transient immunity: 75 kV/µs.

· Compact packages: 8-pin wide body stretched SOIC, 8-pin narrow body SOIC.

· Safety approvals: UL 1577, CSA, VDE (pending), CQC.

APPLICATIONS

· Industrial, HEV, and renewable energy inverters.

· AC, brushless, and DC motor controls and drives.

· Variable speed motor control in consumer white goods.

· Isolated switch mode and UPS power supplies.

· Automotive on-board chargers, battery management systems, and charging stations.