MCP4922-E/ST

更新时间： 2024-02-13 17:08:59

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
42页	3213K
描述
12-Bit DAC with SPI⑩ Interface

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MCP4922-E/ST 数据手册

MCP4921/4922

12-Bit DAC with SPI™ Interface

Features

Description

• 12-Bit Resolution

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.

• ±0.2 LSB DNL (typ)

• ±2 LSB INL (typ)

• Single or Dual Channel

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.

• 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

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.

• External V_REFInput

• 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

Package Types

8-Pin PDIP, SOIC, MSOP

Block Diagram

OUTA

SDI

SCK LDAC

SCK

SDI

REFA

V_DD

Power-on

Reset

LDAC

Interface Logic

AV_SS

Input

14-Pin PDIP, SOIC, TSSOP

OUTA

REFA

DAC_A

DAC_B

V_REF

SCK

REFB

String

DAC_B

String

DAC_A

SDI

OUTB

SHDN

LDAC

Buffer

Gain

Logic

Gain

Logic

Output

Op Amps

Output

Logic

V_OUTA

V_OUTB

SHDN

DS21897B-page 1

12 3 4 5 6 7...42

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