Datasheet
MCP4802/4812/4822
DS22249A-page 22 2010 Microchip Technology Inc.
REGISTER 5-1: WRITE COMMAND REGISTER FOR MCP4822 (12-BIT DAC)
REGISTER 5-2: WRITE COMMAND REGISTER FOR MCP4812 (10-BIT DAC)
REGISTER 5-3: WRITE COMMAND REGISTER FOR MCP4802 (8-BIT DAC)
Where:
W-x W-x W-x W-0 W-x W-x W-x W-x W-x W-x W-x W-x W-x W-x W-x W-x
A
/B — GA SHDN D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
bit 15 bit 0
W-x W-x W-x W-0 W-x W-x W-x W-x W-x W-x W-x W-x W-x W-x W-x W-x
A/B — GA SHDN D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 x x
bit 15 bit 0
W-x W-x W-x W-0 W-x W-x W-x W-x W-x W-x W-x W-x W-x W-x W-x W-x
A
/B — GA SHDN D7 D6 D5 D4 D3 D2 D1 D0 x xxx
bit 15 bit 0
bit 15 A/B: DAC
A
or DAC
B
Selection bit
1 = Write to DAC
B
0 = Write to DAC
A
bit 14 — Don’t Care
bit 13 G
A: Output Gain Selection bit
1 =1x (V
OUT
= V
REF
* D/4096)
0 =2x (V
OUT
= 2 * V
REF
* D/4096), where internal VREF = 2.048V.
bit 12 SHDN: Output Shutdown Control bit
1 = Active mode operation. VOUT is available.
0 = Shutdown the selected DAC channel. Analog output is not available at the channel that was shut down.
V
OUT
pin is connected to 500 ktypical)
bit 11-0 D11:D0: DAC Input Data bits. Bit x is ignored.
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR 1 = bit is set 0 = bit is cleared x = bit is unknown