Description
The HCPL-7860/HCPL-786J Optically Isolated Modulator
and HCPL-0872 Digital Interface IC or digital filter together
form an isolated programmable two-chip analog-to-digital
converter. The isolated modulator allows direct measurement
of motor phase currents in power inverters.
In operation, the HCPL-7860/HCPL-786J Isolated Modulator
converts a low-bandwidth analog input into a highspeed
one-bit data stream by means of a Sigma-Delta
() over-sampling modulator. This modulation provides
for high noise margins and excellent immunity against
isolation-mode transients. The modulator data and onchip
sampling clock are encoded and transmitted across
the isolation boundary where they are recovered and decoded
into separate high-speed clock and data channels.
NOTE: A 0.1 μF bypass capacitor must be connected between pins VDD1 and GND1 and between pins VDD2 and GND2.
Related products
