PCF8591 Просмотр технического описания (PDF) - Philips Electronics

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PCF8591

8-bit A/D and D/A converter

Philips Electronics 

Philips Semiconductors

8-bit A/D and D/A converter

handbook, full pagewidth

msb

lsb

D7 D6 D5 D4 D3 D2 D1 D0 DAC data

register

VAOUT

VDD

VREF

VAOUT = VAGND +

VREF - VAGND

7

∑

Di × 2i

256

i=0

Product specification

PCF8591

MBL827

VAGND

VSS

00 01 02 03 04

HEX code

FE FF

Fig.7 DAC data and DC conversion characteristics.

handbook, full pagewidth

MBL828

PROTOCOL S

ADDRESS

0A

CONTROL BYTE

A

DATA BYTE 1

A

DATA BYTE 2

A

SCL

SDA

VAOUT

12

891

high impedance state or

previous value held in DAC register

91

91

previous value held in

DAC register

value of data byte 1

time

Fig.8 D/A conversion sequence.

2003 Jan 27

8

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