MCP4021 datasheet(25/64 Pages) MICROCHIP

25 / 64 page

DS21945E-page 25

MCP4021/2/3/4

3.0

PIN DESCRIPTIONS

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

TABLE 3-1:

PIN FUNCTION TABLE

3.1

Positive Power Supply Input (VDD)

The VDD pin is the device’s positive power supply input.

The input power supply is relative to VSS and can range

from 2.7V to 5.5V. A decoupling capacitor on VDD (to

VSS) is recommended to achieve maximum

performance.

3.2

Ground (VSS)

The VSS pin is the device ground reference.

3.3

Potentiometer Terminal A

The terminal A pin is connected to the internal potenti-

ometer’s terminal A (available on some devices). The

potentiometer’s terminal A is the fixed connection to the

0x3F terminal of the digital potentiometer.

The terminal A pin is available on the MCP4021,

MCP4022 and MCP4023 devices. The terminal A pin

does not have a polarity relative to the terminal W or B

pins. The terminal A pin can support both positive and

negative current. The voltage on teminal A must be

between VSS and VDD.

The terminal A pin is not available on the MCP4024.

The potentiometer’s terminal A is internally floating.

3.4

Potentiometer Wiper (W) Terminal

The terminal W pin is connected to the internal potenti-

ometer’s terminal W (the wiper). The wiper terminal is

the adjustable terminal of the digital potentiometer. The

terminal W pin does not have a polarity relative to

terminals A or B pins. The terminal W pin can support

both positive and negative current. The voltage on

teminal W must be between VSS and VDD.

3.5

Potentiometer Terminal B

The terminal B pin is connected to the internal potenti-

ometer’s terminal B (available on some devices). The

potentiometer’s terminal B is the fixed connection to the

0x00 terminal of the digital potentiometer.

The terminal B pin is available on the MCP4021 device.

The terminal B pin does not have a polarity relative to

the terminal W or A pins. The terminal B pin can

support both positive and negative current. The voltage

on teminal B must be between VSS and VDD.

The terminal B pin is not available on the MCP4022,

MCP4023 and MCP4024 devices.

For the MCP4023 and MCP4024, the internal potenti-

ometer’s terminal B is internally connected to VSS.

Terminal B does not have a polarity relative to terminals

W or A. Terminal B can support both positive and

negative current.

For the MCP4022, terminal B is internally floating.

Pin Number

Symbol

Type

Buffer

Type

Function

MCP4021

(SOIC-8)

MCP4022

MCP4023

(SOT-23-6)

MCP4024

(SOT-23-5)

VDD

—

Positive Power Supply Input

VSS

—

Ground

—

I/O

Potentiometer Terminal A

I/O

Potentiometer Wiper Terminal

TTL

Chip Select Input

—

I/O

Potentiometer Terminal B

—

No Connection

U/D

TTL

Increment/Decrement Input

Legend: TTL = TTL compatible input

A = Analog input

I = Input

O = Output

P = Power

MCP4021 датащи(PDF) 25 Page - Microchip Technology

MCP4021 датащи(HTML) 25 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

датащи скачать

ссылки URL