MCP3002-ISLASHMS datasheet(14/28 Pages) MICROCHIP

14 / 28 page

MCP3002

DS21294C-page 14

FIGURE 5-1:

Communication with the MCP3002 using MSB first format only.

FIGURE 5-2:

Communication with MCP3002 using LSB first format.

CLK

OUT

HI-Z

Null

Bit B9 B8 B7 B6 B5 B4 B3 B2 B1 B0*

HI-Z

SAMPLE

CONV

CYC

CSH

CYC

* 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.

** t

DATA: during this time, the bias current and the comparator powers down while the reference input becomes a high impedance

node.

DATA**

SUCS

ODD/

SIGN

Don’t Care

Null

Bit

B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 B1 B2 B3 B4 B5 B6 B7* B8 B9

CLK

OUT

HI-Z

(MSB)

CONV

DATA **

Power Down

SAMPLE

CYC

CSH

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

** t

DATA: 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.

SUCS

Don’t Care

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