MCP4021 datasheet(1/64 Pages) MICROCHIP

部件名	MCP4021

功能描述	Low-Cost NV Digital POT with WiperLock??Technology

PDF	64 Pages

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制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

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DS21945E-page 1

MCP4021/2/3/4

Features

• Non-volatile Digital Potentiometer in SOT-23,

SOIC, MSOP and DFN packages

• 64 Taps: 63 Resistors with Taps to terminal A and

terminal B

• Simple Up/Down (U/D) Protocol

• Power-on Recall of Saved Wiper Setting

• Resistance Values: 2.1 k

Ω, 5 kΩ, 10 kΩ or 50 kΩ

• Low Tempco:

- Absolute (Rheostat): 50 ppm (0°C to 70°C typ.)

- Ratiometric (Potentiometer): 10 ppm (typ.)

• Low Wiper Resistance: 75

Ω (typ.)

• WiperLock™ Technology to Secure the wiper

setting in non-volatile memory (EEPROM)

• High-Voltage Tolerant Digital Inputs: Up to 12.5V

• Low-Power Operation: 1 µA Max Static Current

• Wide Operating Voltage: 2.7V to 5.5V

• Extended Temperature Range: -40°C to +125°C

• Wide Bandwidth (-3 dB) Operation:

- 4 MHz (typ.) for 2.1 k

Ω device

Description

The MCP4021/2/3/4 devices are non-volatile, 6-bit

digital potentiometers that can be configured as either a

potentiometer or rheostat. The wiper setting is

controlled through a simple Up/Down (U/D) serial

interface.

These device’s implement Microchip’s WiperLock tech-

nology, which allows application-specific calibration

settings to be secured in the EEPROM without

requiring the use of an additional write-protect pin.

Package Types

Block Diagram

Device Features

.

A

W

B

MCP4021

SOIC, MSOP, DFN

MCP4022

SOT-23-6

MCP4023

SOT-23-6

MCP4024

SOT-23-5

Rheostat

Potentiometer

Rheostat

A

VSS

W

1

2

3

4

8

7

6

5

VDD

U/D

NC

B

CS

4

1

2

3

5 W

CS

VDD

VSS

U/D

4

1

2

3

6 A

CS

VDD

VSS

U/D

5 W

A

W

B

4

1

2

3

6 A

CS

VDD

VSS

U/D

5 W

A

W

A

B

V

DD

V

SS

U/D

W

B

CS

WiperLock™

EEPROM and

A

2-Wire

Interface

and

Control

Logic

Power-Up

and

Brown-Out

Control

Technology

Device

Wiper

Configuration

Memory

Type

Resistance (typical)

# of

Steps

VDD

Operating

Range

Control

Interface

WiperLock™

Technology

Options (k

Ω)Wiper (Ω)

MCP4021 Potentiometer (1)

EE

2.1, 5.0, 10.0, 50.0

75

64

2.7V - 5.5V

U/D

Yes

MCP4022

Rheostat

EE

2.1, 5.0, 10.0, 50.0

75

64

2.7V- 5.5V

U/D

Yes

MCP4023

Potentiometer

EE

2.1, 5.0, 10.0, 50.0

75

64

2.7V - 5.5V

U/D

Yes

MCP4024

Rheostat

EE

2.1, 5.0, 10.0, 50.0

75

64

2.7V - 5.5V

U/D

Yes

Note 1: Floating either terminal (A or B) allows the device to be used in Rheostat mode.

Low-Cost NV Digital POT with WiperLock™ Technology

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