MCP3002-I 查看數據表（PDF） - Microchip Technology

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MCP3002-I

2.7V Dual Channel 10-Bit A/D Converter with SPI Serial Interface

Microchip Technology 

MCP3002

CS

CLK

tSUCS

tCYC

tCSH

tCYC

DIN

Don’t Care

ODD/

SIGN

DOUT

HI-Z

Null

Bit

B9

B8

B7

B6

B5

B4

B3

B2

B1 B0*

HI-Z

tSAMPLE

tCONV

tDATA**

* After completing the data transfer, if further clocks are applied with CS low, the A/D Converter will output

zeros indefinitely. See Figure 5-2 for details on obtaining LSB first data.

** tDATA: during this time, the bias current and the comparator powers down while the reference input

becomes a high-impedance node.

FIGURE 5-1:

Communication with the MCP3002 using MSB first format only.

CS

CLK

tSUCS

tCYC

tCSH

Power Down

DIN

Don’t Care

DOUT

HI-Z

tSAMPLE

Null

Bit

B9

B8

B7

B6

B5

B4

B3

B2

B1

B0

B1

B2

B3

B4

B5

B6 B7* B8

B9

HI-Z

(MSB)

tCONV

tDATA **

* 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.

FIGURE 5-2:

Communication with MCP3002 using LSB first format.

DS21294D-page 18

© 2008 Microchip Technology Inc.

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