MCP4921 datasheet(1/40 Pages) MICROCHIP

부품명	MCP4921

상세설명	12-Bit DAC with SPI??Interface

PDF	40 Pages

Scroll/Zoom	100%

제조업체	MICROCHIP [Microchip Technology]

홈페이지	http://www.microchip.com

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1 / 40 page

 2004 Microchip Technology Inc.

DS21897A-page 1

MCP4921/4922

Features

•12-Bit Resolution

• ±0.2 LSB DNL (typ)

• ±2 LSB INL (typ)

• Single or Dual Channel

• Rail-to-Rail Output

• SPI™ Interface with 20 MHz Clock Support

• Simultaneous Latching of the Dual DACs w/LDAC

• Fast Settling Time of 4.5 µs

• Selectable Unity or 2x Gain Output

• 450 kHz Multiplier Mode

•External VREF Input

• 2.7V to 5.5V Single-Supply Operation

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

Applications

• Set Point or Offset Trimming

• Sensor Calibration

• Digitally-Controlled Multiplier/Divider

• Portable Instrumentation (Battery-Powered)

• Motor Feedback Loop Control

Block Diagram

Description

The Microchip Technology Inc. MCP492X are 2.7 –

5.5V, low-power, low DNL, 12-Bit Digital-to-Analog Con-

verters (DACs) with optional 2x buffered output and SPI

interface.

The MCP492X are DACs that provide high accuracy

and low noise performance for industrial applications

where calibration or compensation of signals (such as

temperature, pressure and humidity) are required.

The MCP492X are available in the extended tempera-

ture range and PDIP, SOIC, MSOP and TSSOP

packages.

The MCP492X devices utilize a resistive string archi-

tecture, with its inherent advantages of low DNL error,

low ratio metric temperature coefficient and fast settling

time. These devices are specified over the extended

temperature range. The MCP492X include double-

buffered inputs, allowing simultaneous updates using

the LDAC pin.

These devices also incorporate a

Power-On Reset (POR) circuit to ensure reliable

power-up.

Package Types

Op Amps

VDD

AVSS

CS

SDI

SCK

Interface Logic

Input

Register A Register B

Input

DACA

Register

DACB

String

DACB

String

DACA

VREF

Output

Logic

Power-on

Reset

VREF

A

B

VOUTA

VOUTB

LDAC

Buffer

SHDN

Output

Gain

Logic

Gain

Logic

14

8-Pin PDIP, SOIC, MSOP

1

2

3

4

8

7

6

5

CS

SCK

SDI

VDD

AVSS

VOUTA

VREFA

LDAC

1

2

3

4

13

12

11

10

9

8

5

6

7

14-Pin PDIP, SOIC, TSSOP

VDD

NC

CS

SCK

VREFB

NC

SDI

LDAC

SHDN

VOUTB

VOUTA

VREFA

AVSS

12-Bit DAC with SPI™ Interface

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