MCP3302-I/ST Microchip Technology, MCP3302-I/ST Datasheet - Page 21

• Manufacturer Part Number: MCP3302-I/ST
• Description: 13-Bit Differential Input, Low Power A/D Converter with SPI Serial Interface
• Manufacturer: Microchip Technology

FIGURE 7-2:
FIGURE 7-3:
2001 Microchip Technology Inc.
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,
** t
†
* After completing the data transfer, if further clocks are applied with CS low, the A/D Converter will output zeros indefinitely.
** t
†
then followed with zeros indefinitely. See Figure 7-3 below.
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.
ance node, leaving the CLK running to clock out the LSB-first data or zeros.
ance node, leaving the CLK running to clock out LSB first data or zeroes.
DATA
DATA
Start
: during this time, the bias current and the comparator power down while the reference input becomes a high imped-
: During this time, the bias circuit and the comparator power down while the reference input becomes a high imped-
SGL/
DIFF
Start
t
SUCS
Communication with MCP3302/04 (MSB first Format).
HI-Z
Communication with MCP3302/04 (LSB first Format).
D2
t
SGL/
DIFF
SUCS
HI-Z
D1
D2
D0
t
ACQ
D1
Null
Bit
D0
SB†
t
ACQ
(MSB)
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
†
B11 B10
t
CONV
t
SAMPLE
B9
Don’t Care
B8
t
t
SAMPLE
CONV
Don’t Care
B7
B6
B5
B4
B3
B2
MCP3302/04
Power Down
t
DATA
B1
t
**
CSH
t
DATA
B0 *
**
DS21697A-page 21
Start
HI-Z
t
SGL/
DIFF
SAMPLE
t
CSH
SB
*
D2
HI-Z