MCP4821 datasheet(1/36 Pages) MICROCHIP

部件名	MCP4821

功能描述	12-Bit DACs with Internal VREF and SPI??Interface

PDF	36 Pages

Scroll/Zoom	100%

制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

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1 / 36 page

DS21953A-page 1

MCP4821/MCP4822

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

with LDAC pin

• Fast Settling Time of 4.5 µs

• Selectable Unity or 2x Gain Output

• 2.048V Internal Band Gap Voltage Reference

•50 ppm/°C VREF Temperature Coefficient

• 2.7V to 5.5V Single-Supply Operation

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

Applications

• Set Point or Offset Trimming

• Sensor Calibration

• Precision Selectable Voltage Reference

• Portable Instrumentation (Battery-Powered)

• Calibration of Optical Communication Devices

Block Diagram

Description

The Microchip Technology Inc. MCP482X devices are

2.7V–5.5V, low-power, low DNL, 12-bit Digital-to-Analog

Converters (DACs) with internal band gap voltage

reference, optional 2x-buffered output and Serial

Peripheral Interface (SPI™).

The MCP482X family of DACs 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 MCP482X devices are available in the extended

temperature range and PDIP, SOIC and MSOP

packages.

The MCP482X devices utilize a resistive string

architecture, 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 MCP482X family

includes double-buffered registers, allowing simulta-

neous 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

Output

Logic

Power-on

Reset

VOUTA

VOUTB

LDAC

SHDN

Output

Gain

Logic

Gain

Logic

2.048V

VREF

8-Pin PDIP, SOIC, MSOP

1

2

3

4

8

7

6

5

CS

SCK

SDI

VDD

AVSS

VOUTA

SHDN

LDAC

8-Pin PDIP, SOIC, MSOP

1

2

3

4

8

7

6

5

CS

SCK

SDI

VDD

AVSS

VOUTA

VOUTB

LDAC

12-Bit DACs with Internal VREF and SPI™ Interface

类似零件编号 - MCP4821

制造商	部件名	数据表	功能描述
Microchip Technology	MCP4821	1Mb / 48P	8/10/12-Bit Voltage Output Digital-to-Analog Converter with Internal VREF and SPI Interface 2010
	MCP4821	1Mb / 50P	SPI Interface with 20 MHz Clock Support 01/27/15
	MCP4821-E/MC	1Mb / 48P	8/10/12-Bit Voltage Output Digital-to-Analog Converter with Internal VREF and SPI Interface 2010
	MCP4821-E/MS	1Mb / 48P	8/10/12-Bit Voltage Output Digital-to-Analog Converter with Internal VREF and SPI Interface 2010
	MCP4821-E/P	1Mb / 48P	8/10/12-Bit Voltage Output Digital-to-Analog Converter with Internal VREF and SPI Interface 2010

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类似说明 - MCP4821

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