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MCP3008T Datasheet(PDF) 20 Page - Microchip Technology

Part No. MCP3008T
Description  2.7V 4-Channel/8-Channel 10-Bit A/D Converters with SPI Serial Interface
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP3008T Datasheet(HTML) 20 Page - Microchip Technology

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MCP3004/3008
DS21295D-page 20
© 2008 Microchip Technology Inc.
FIGURE 5-1:
Communication with the MCP3004 or MCP3008.
FIGURE 5-2:
Communication with MCP3004 or MCP3008 in LSB First Format.
CS
CLK
DIN
DOUT
D1
D2
D0
HI-Z
Don’t Care
Null
Bit B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 *
HI-Z
tSAMPLE
tCONV
SGL/
DIFF
Start
tCYC
tCSH
tCYC
D2
SGL/
DIFF
Start
*
After completing the data transfer, if further clocks are applied with CS low, the A/D converter will output LSB
first data, then followed with zeros indefinitely. See Figure 5-2 below.
**
tDATA: during this time, the bias current and the comparator powers down while the reference input becomes
a high-impedance node.
tDATA **
tSUCS
Null
Bit
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
CS
CLK
DOUT
HI-Z
HI-Z
(MSB)
tCONV
tDATA **
Power Down
tSAMPLE
Start
SGL/
DIFF
DIN
tCYC
tCSH
D0
D1
D2
* After completing the data transfer, if further clocks are applied with CS low, the A/D converter will output zeros
indefinitely.
** tDATA: During this time, the bias circuit and the comparator powers down while the reference input becomes
a high-impedance node, leaving the CLK running to clock out LSB first data or zeroes.
tSUCS
Don’t Care
*


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