MCP3201T-CISLASHMS datasheet(15/36 Pages) MICROCHIP

15 / 36 page

DS21290E-page 15

MCP3201

3.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 3-1.

Additional descriptions of the device pins follows.

TABLE 3-1:

PIN FUNCTION TABLE

3.1

Positive Analog Input (IN+)

Positive analog input. This input can vary from IN- to

VREF + IN-.

3.2

Negative Analog Input (IN-)

Negative analog input. This input can vary ±100 mV

from VSS.

3.3

Chip Select/Shutdown (CS/SHDN)

The CS/SHDN pin is used to initiate communication

with the device when pulled low and will end a

conversion and put the device in low power standby

when pulled high. The CS/SHDN pin must be pulled

high between conversions.

3.4

Serial Clock (CLK)

The SPI clock pin is used to initiate a conversion and to

clock out each bit of the conversion as it takes place.

See Section 6.2 “Maintaining Minimum Clock

Speed”

for constraints on clock speed.

3.5

Serial Data Output (DOUT)

The SPI serial data output pin is used to shift out the

results of the A/D conversion. Data will always change

on the falling edge of each clock as the conversion

takes place.

MCP3201

Symbol

Description

MSOP, PDIP, SOIC,

TSSOP

1VREF

Reference Voltage Input

IN+

Positive Analog Input

IN-

Negative Analog Input

4VSS

Ground

5CS/SHDN

Chip Select/Shutdown Input

6DOUT

Serial Data Out

CLK

Serial Clock

8VDD

+2.7V to 5.5V Power Supply

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