max5812peut-t Maxim Integrated Products, Inc., max5812peut-t Datasheet - Page 10

• Manufacturer Part Number: max5812peut-t
• Description: Max5812 12-bit Low-power, 2-wire, Serial Voltage-output Dac
• Manufacturer: Maxim Integrated Products, Inc.

12-Bit Low-Power, 2-Wire, Serial
Voltage-Output DAC
Table 3. Command Byte Definitions
*When C3 = 0 and C2 = 1, data bits D11 and D10 write to the power-down registers (PD1 and PD0).
X = Don’t care.
Figure 6. Example Write Command Sequences
10
C3
1
1
1
1
1
0
0
0
0
______________________________________________________________________________________
MSB
MSB
S
S
C2
1
1
1
1
0
1
1
1
1
A6
A6
MSB
A5
D7
A5
C1
X
X
X
X
X
0
0
1
1
SERIAL DATA INPUT
D6
A4
A4
C0
0
1
0
1
X
X
X
X
X
D5
A3
A3
D4
D11/PD1*
A2
A2
EXAMPLE WRITE TO POWER-DOWN REGISTER SEQUENCE
DATA
DATA
DATA
DAC
DAC
DAC
X
X
0
0
1
1
D3
A1
A1
EXAMPLE WRITE DATA SEQUENCE
D2
A0
A0
D10/PD0*
DATA
DATA
DATA
DAC
DAC
DAC
X
X
0
1
0
1
LSB
R/W
LSB
R/W
D1
LSB
D0
ACK
ACK
D9–D8
DATA
DATA
DATA
DAC
DAC
DAC
XX
XX
XX
XX
XX
XX
ACK
MSB
MSB
C3
C3
C2
C2
Load DAC with a new data from the following data byte
and update DAC output simultaneously as soon as data
is available from the serial bus. The DAC and input
registers are updated with the new data.
Load input register with the data from the following data
byte. DAC output remains unchanged.
Load input register with data from the following data byte.
Update DAC output to the previously stored data.
Update DAC output from input register. The device will
ignore any new data.
Read data request. Data bits are ignored. The contents of
the DAC register are available on the bus.
Powers up device.
Power-down mode 0. Powers down device with output
floating.
Power-down mode 1. Powers down device with output
terminated with 1kΩ to GND.
Power-down mode 2. Powers down device with output
terminated with 100kΩ to GND.
P
C1
X
C0
X
PD1
D11
PD0
D10
FUNCTION
D9
X
LSB
LSB
D8
X
ACK
ACK
P