AD5675R datasheet(27/28 Pages) AD

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AD5676

Data Sheet

Rev. B | Page 26 of 27

GALVANICALLY ISOLATED INTERFACE

In many process control applications, it is necessary to provide

an isolation barrier between the controller and the unit being

controlled to protect and isolate the controlling circuitry from

any hazardous common-mode voltages that may occur. iCoupler®

products from Analog Devices provide voltage isolation in excess

of 2.5 kV. The serial loading structure of the AD5676 makes the

device ideal for isolated interfaces because the number of interface

lines is kept to a minimum. Figure 51 shows a 4-channel

isolated interface to the AD5676 using an ADuM1400. For

further information, visit www.analog.com/icoupler.

ENCODE

SERIAL

CLOCK IN

CONTROLLER

ADuM14001

SERIAL

DATA OUT

SYNC OUT

LOAD DAC

OUT

DECODE

SCLK

SDI

SYNC

LDAC

VIA

VOA

ENCODE

DECODE

VIB

VOB

ENCODE

DECODE

VIC

VOC

ENCODE

DECODE

VID

VOD

1ADDITIONAL PINS OMITTED FOR CLARITY.

Figure 51. Isolated Interface

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