MCP3304 Microchip Technology, MCP3304 Datasheet - Page 24

• Manufacturer Part Number: MCP3304
• Description: 13-Bit Differential Input, Low Power A/D Converter with SPI Serial Interface
• Manufacturer: Microchip Technology

MCP3302/04
FIGURE 7-2:
FIGURE 7-3:
DS21697C-page 24
CS
CLK
D
D
CS
CLK
D
D
IN
OUT
IN
OUT
* After completing the data transfer, if further clocks are applied with CS low, the A/D Converter will output LSB
first data, followed by zeros indefinitely. See Figure 7-3 below.
** T
a high impedance node, leaving the CLK running to clock out the LSB-first data or zeros.
†
* After completing the data transfer, if further clocks are applied with CS low, the A/D Converter will output zeros
indefinitely.
** T
a high impedance node, leaving the CLK running to clock out LSB first data or zeroes.
†
When operating in single ended mode, the sign bit will always be transmitted as a ‘0’.
When operating in single ended mode, the sign bit will always be transmitted as a ‘0’.
DATA
DATA
Start
SGL/
DIFF
Start
: during this time, the bias current and the comparator power down while the reference input becomes
: During this time, the bias circuit and the comparator power down while the reference input becomes
T
SUCS
D2
HI-Z
SGL/
DIFF
T
SUCS
HI-Z
D1
D2
D0
Communication with MCP3302/04 (MSB first Format).
Communication with MCP3302/04 (LSB first Format).
T
ACQ
D1
Null
Bit
D0
SB†
T
(MSB)
ACQ
B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11
Null
Bit
SB†
T
CONV
B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 *
T
SAMPLE
Don’t Care
T
T
Don’t Care
CONV
SAMPLE
Power Down
T
DATA
© 2007 Microchip Technology Inc.
T
T
**
DATA
CSH
**
Start
HI-Z
T
T
SGL/
DIFF
SAMPLE
CSH
SB*
D2
HI-Z