HCPL-7860-300E Datasheet, PDF (1/18 Pages) AVAGO TECHNOLOGIES LIMITED – Optically Isolated Sigma-Delta (S-D) Modulator

HCPL-7860/HCPL-786J
Optically Isolated Sigma-Delta (S-D) Modulator
Data Sheet
Lead (Pb) Free
RoHS 6 fully
compliant
RoHS 6 fully compliant options available;
-xxxE denotes a lead-free product
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 measure-
ment of motor phase currents in power inverters.
In operation, the HCPL-7860/HCPL-786J Isolated Modula-
tor converts a low-bandwidth analog input into a high-
speed one-bit data stream by means of a Sigma-Delta
(6') 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 de-
coded into separate high-speed clock and data channels.
Features
x 12-bit Linearity
x 200 ns Conversion Time
(Pre-Trigger Mode 2 with HCPL-0872)
x 12-bit Effective Resolution with 5 Ps Signal Delay
(14-bit with 102 Ps) (with HCPL-0872)
x Fast 3 Ps Over-Range Detection (with HCPL-0872)
x ± 200 mV Input Range with Single 5 V Supply
x 1% Internal Reference Voltage Matching
x Offset Calibration (with HCPL-0872)
x -40°C to +85°C Operating Temperature Range
x 15 kV/Ps Isolation Transient Immunity
x Safety Approval: UL 1577, CSA and IEC/EN/DIN EN
60747-5-2
Applications
x Motor Phase and Rail Current Sensing
x Data Acquisition Systems
x Industrial Process Control
x Inverter Current Sensing
x General Purpose Current Sensing and Monitoring
Input
Current
1
8
2
SIGMA
DELTA
7
HCPL-0872
MCU
MOD./
DECODE
or
or
3 ENCODE
6
Digital Filter
DSP
4
5
HCPL-7860
NOTE: A 0.1 μF bypass capacitor must be connected between pins VDD1 and GND1 and between pins VDD2 and GND2.
CAUTION: It is advised that normal static precautions be taken in handling and assembly
of this component to prevent damage and/or degradation, which may be induced by ESD.