The HCPL-7860/HCPL-786J Optically Isolated Modulator and HCPL-0872 Digital Interface IC or digital filter together form a optocoupler isolated programmable two-chip analog-to-digital converter. The isolated modulator allows direct measurement of motor phase currents in power inverters used in automotive applications.
In operation, the HCPL-7860/HCPL-786J Isolated Modulator (optocoupler with 3750 VRMS dielectric withstand voltage rating) converts a lowbandwidth analog input into a high-speed one-bit data stream by means of a Sigma-Delta (Σ−∆) over-sampling modulator.
This modulation provides for high noise margins and excellent immunity against isolation-mode transients. The modulator data and on-chip sampling clock are encoded and transmitted across the isolation boundary where they are recovered and decoded into separate high-speed clock and data channels.
Feature
- 12-bit Linearity
- 800 ns Conversion Time (Pre-Trigger Mode 2)
- 5 Conversion Modes for Resolution/Speed Trade-Off; 12-bit Effective Resolution with 20 us Signal Delay (14-bit with 103 us)
- Fast 3 us Over-Range Detection
- Serial I/O (SPI,QSPI and Microwire Compatible)
- /-200 mV Input Range with Single 5 V Supply
- 1% Internal Reference Voltage Matching
- Offset Calibration
- -40oC to 85oC Operating Temperature Range
- 15 kV/us Isolation Transient Immunity
- Regulatory Approvals; UL, CSA, IEC/EN/DIN EN 60747-5-2
- Options available are:
Applications
- Motor Phase and Rail Current Sensing
- DC Bus Voltage sensing
- Inverter Current Sensing
- Switched Mode Power Supply Signal Isolation
- General Purpose Current Sensing and Monitoring
- General Purpose Analog Signal Isolation
- Traditional Hall Effect Current Sensor Replacement
