描述 Description

MCP4822 is a?dual channel 12-bit Digital-to-Analog converter (DAC) with internal voltage reference. This device offers high accuracy and low power consumption, and is available in various packages. Communication with the device is accomplished via a simple serial interface using SPI protocols. This device is a part of the MCP4802/MCP4812/MCP4822 product family, which are?dual channel 8-bit/10-bit/12-bit DACs with internal voltage reference (VREF). These devices provide very high accuracy and low noise performance, and are suitable for consumer and industrial applications, such as set point control, offset adjustment and sensor calibration applications. The low power consumption and small package options make these devices very attractive for many portable and battery-powered applications. If?one output?is needed then the MCP4801/4811/4821?single channel product family can be used.

特性 Features

12-bit Resolution
Dual Channel Voltage Output
2.7V to 5.5V Operation
Operating Current 415 μA (typ)
Internal Voltage Reference 2.048V
Selectable Unity or 2x Gain Output
INL ±2 LSB (typ)
DNL ±0.75 LSB (max)
Output Settling Time 4.5 μs
SPI Interface
8-pin PDIP, SOIC, MSOP packages
Temperature Range -40°C to +125°C
AEC-Q100 Grade 1 qualified

簡介

MCP4822屬于集成電路（IC）的數(shù)模轉(zhuǎn)換器（DAC）。由制造生產(chǎn)的MCP4822數(shù)模轉(zhuǎn)換器（DAC）數(shù)模轉(zhuǎn)換器（DAC、D/A、D2A 或 D 轉(zhuǎn) A）可將數(shù)字信號轉(zhuǎn)換為緩沖或無緩沖的模擬電壓或電流。DAC 架構(gòu)是否適合特定應(yīng)用，要取決于分辨率和采樣頻率。DAC 通常用于音樂播放器，將數(shù)字?jǐn)?shù)據(jù)流轉(zhuǎn)換為模擬音頻流。它們還用于電視和手機，將數(shù)字視頻數(shù)據(jù)轉(zhuǎn)換為模擬視頻信號，再連接到屏幕驅(qū)動器，以顯示單色或彩色圖像。