Broadcom ACPL-C877 Isolated Digital Voltage Sensors

Broadcom ACPL-C877 Isolated Digital Voltage Sensors are 1-bit, second-order sigma-delta modulators tailored for voltage sensing. The Broadcom ACPL-C877 sensors convert analog signals from 0V to 2V into a high-speed data stream with galvanic isolation via optical coupling. With a 2V differential input range and high 1GΩ input impedance, these sensors are ideal for isolated voltage sensing in electronic power converters like motor drives and renewable energy systems. Typically, a resistive voltage divider scales the DC-link voltage to fit the sensor's input range. Operating from a 5V power supply, the ACPL-C877 sensors offer a 76dB dynamic range with an appropriate digital filter.

Features

Superior optical isolation and insulation
10MHz internal clock
1-bit, second-order sigma-delta modulator
16-bit resolution, no missing codes (10-bit ENOB)
76dB typical SNR, 66dB typical SNDR
±10mV maximum offset error at room temperature
8µV/°C typical offset drift
±1% maximum gain error
Internal reference voltage
0V to 2V linear range with single 5V supply (3.2V full scale)

3V to 5.5V wide supply range for digital interface
-40°C to +110°C operating temperature range
Output slew rate control
SSO-8 package
25kV/µs common-mode transient immunity
Safety and regulatory approval
- IEC/EN 60747-5-5: 1414 Vpeak working insulation voltage
- UL 1577: 5000V_RMS/1 min isolation voltage
- CAN/CSA-C22.2 No. 62368-1

Applications

Isolated voltage sensing in AC and servo motor drives
Isolated DC-bus voltage sensing in solar inverters and wind turbine inverters
Isolated sensor interfaces

Signal isolation in data acquisition systems
General-purpose voltage sensing
Voltage sensing in insulation resistance measurements

Functional Block Diagram

Block Diagram - Broadcom ACPL-C877 Isolated Digital Voltage Sensors

Additional Resources

發佈日期: 2024-06-21 | 更新日期: 2024-08-27