MCP4801T-E/P MICROCHIP [Microchip Technology], MCP4801T-E/P Datasheet - Page 22

• Manufacturer Part Number: MCP4801T-E/P
• Description: 8/10/12-Bit Voltage Output Digital-to-Analog Converter with Internal VREF and SPI Interface
• Manufacturer: MICROCHIP [Microchip Technology]

MCP4801/4811/4821
REGISTER 5-1:
REGISTER 5-2:
REGISTER 5-3:
Where:
DS22244B-page 22
bit 15
bit 14
bit 13
bit 12
bit 11-0
Note 1:
bit 15
bit 15
bit 15
Legend
R = Readable bit
-n = Value at POR
W-x
W-x
W-x
0
0
0
( 1)
W-x
W-x
W-x
—
—
—
0 = Write to DAC register
1 = Ignore this command
—
GA: Output Gain Selection bit
1 = 1x (V
0 = 2x (V
SHDN: Output Shutdown Control bit
1 = Active mode operation. V
0 = Shutdown the device. Analog output is not available. V
D11:D0: DAC Input Data bits. Bit x is ignored.
This bit must be ‘0’. The device ignores the write command if this MSB bit is not ‘0’.
W-x
W-x
W-x
Don’t Care
GA
GA
GA
OUT
OUT
SHDN
SHDN
SHDN
WRITE COMMAND REGISTER FOR MCP4811 (10-BIT DAC)
WRITE COMMAND REGISTER FOR MCP4801 (8-BIT DAC)
WRITE COMMAND REGISTER FOR MCP4821 (12-BIT DAC)
W-0
W-0
W-0
= V
= 2 * V
REF
W-x
D11
W-x
W-x
D9
D7
REF
* D/4096)
W = Writable bit
1 = bit is set
* D/4096), where internal V
W-x
D10
W-x
W-x
D8
D6
OUT
W-x
W-x
W-x
D9
D7
D5
is available. 
W-x
W-x
W-x
D8
D6
D4
W-x
W-x
W-x
D7
D5
D3
U = Unimplemented bit, read as ‘0’
0 = bit is cleared
REF
W-x
W-x
W-x
D6
D4
D2
= 2.048V.
OUT
W-x
W-x
W-x
D5
D3
D1
pin is connected to 500 ktypical)
W-x
W-x
W-x
D4
D2
D0
 2010 Microchip Technology Inc.
W-x
W-x
W-x
D3
D1
x = bit is unknown
x
W-x
W-x
W-x
D2
D0
x
W-x
W-x
W-x
D1
x
x
W-x
W-x
W-x
D0
bit 0
bit 0
bit 0
x
x