AD7991 datasheet(21/25 Pages) AD

Part #	AD7991

Description	4-Channel, 12-/10-/8-Bit ADC with I2CCompatible Interface in 8-Lead SOT23

PDF	25 Pages

Scroll/Zoom	100%

Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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21 / 25 page

Preliminary Technical Data

AD7991/AD7995/AD7999

Rev. PrB | Page 21 of 25

WRITING TO THE AD7991/AD7995/AD7999

This part can be used in read-only mode if the user wishes to

use all 4 channels sequentially as the default on the configure

configuration register of the part AD7991/AD7995/AD7999 if

they want to change from the default settings on the

configuration register.

WRITING A SINGLE BYTE OF DATA TO THE

CONFIGURATION REGISTER

The configuration register is an 8-bit register, so only one byte

of data can be written. Writing a single byte of data to this

data byte written to the configuration register. See Figure 16

below.

SDA

ACK. BY

AD7992

START BY

MASTER

FRAME 1

SERIAL BUS ADDRESS BYTE

ACK. BY

ADC

SCL

STOP

CONTROL REGISTER BYTE

Figure 16.Writing to the AD7991/AD7995/AD7999 Configuration Register

AD7991 Datasheet(PDF) 21 Page - Analog Devices