Rainbow Electronics MAX5821 - Manual (Page 12)

MAX5822
Dual, 12-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
12 ______________________________________________________________________________________
S A6 A5 A4 A3 A2 A1 A0 C3 C2 C1 C0 D11 D10 D9 D8
Sr A6 A5 A4 A3 A2 A1 A0
MSB LSB MSB LSB
LSB MSB
ACK ACK
ACK
D7 D6 D5 D4 D3 D2 D1 D0
MSB LSB
ACK
ACK P
X X PD1 PD0 D11 D10 D9 D8
MSB LSB
DATA BYTES GENERATED BY MASTER DEVICE
DATA BYTES GENERATED BY MAX5822
ACK GENERATED BY
MASTER DEVICE
R/W
= 1
R/W
= 0
Figure 8. Example Read Word Data Sequence
12-BIT
DAC
A
INPUT
REGISTER
A
MUX AND DAC
REGISTER
RESISTOR
NETWORK
POWER-DOWN
CIRCUITRY
SERIAL
INTERFACE
12-BIT
DAC
B
RESISTOR
NETWORK
REF
V DD SDA ADD SCL GND
OUTA
OUTB
MAX5822
INPUT
REGISTER
B
MUX AND DAC
REGISTER
Functional Diagram