HCPL-7860 Datasheet, PDF (3/28 Pages) Agilent(Hewlett-Packard) – Isolated 15-bit A/D Converter

isolated modulator without
additional hardware. Because the
two inputs are multiplexed, only
one conversion at a time can be
made and not all features are
available for the second channel.
The available features for both
channels are shown in the table
at right.
HCPL-x870 Digital Interface IC
Feature
Conversion Mode
Offset Calibration
Pre-Trigger Mode
Over-Range Detection
Adjustable Threshold Detection
Channel #1





Channel #2


Functional Diagrams
ISOLATION
BOUNDARY
V_{DD1 1}
8 V_DD2
V_IN+ 2
V_{IN– 3}
SIGMA-
DELTA
MOD./
ENCODE
7 MCLK
DECODE
6 MDAT
GND1 4
SHIELD
5 GND2
HCPL-7860 Isolated Modulator
CCLK 1
CLAT 2
CDAT 3
MCLK1 4
MDAT1 5
MCLK2 6
MDAT2 7
GND 8
CONFIG.
INTER-
FACE
CON-
VERSION
INTER-
FACE
CH1
16 V_DD
15 CHAN
14 SCLK
13 SDAT
12 CS
THRES- 11 _THR1
HOLD
CH2 _{DETECT 10 OVR1}
&
RESET _{9 RESET}
HCPL-x870 Digital Interface IC
Pin Description, Isolated Modulator
Symbol
Description
V_DD1
V_IN+
Supply voltage input (4.5 V to 5.5 V)
Positive input (± 200 mV
recommended)
V_IN– Negative input
(normally connected to GND1)
GND1 Input ground
Symbol
V_DD2
MCLK
Description
Supply voltage input (4.5 V to 5.5 V)
Clock output (10 MHz typical)
MDAT Serial data output
GND2 Output ground
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