DAC7821中文资料12 位串行输入乘法 DAC数据手册TI规格书

描述 Description

The DAC7821 is a CMOS 12-bit current output digital-to-analog converter (DAC). This device operates from a single 2.5V to 5.5V power supply, making it suitable for battery-powered and many other applications.This DAC operates with a fast parallel interface. Data readback allows the user to read the contents of the DAC register via the DB pins. On power-up, the internal register and latches are filled with zeroes and the DAC outputs are at zero scale. The DAC7821 offers excellent 4-quadrant multiplication characteristics, with a large signal multiplying bandwidth of 10MHz. The applied external reference input voltage (VREF) determines the full-scale output current. An integrated feedback resistor (RFB) provides temperature tracking and full-scale voltage output when combined with an external current-to-voltage precision amplifier. The DAC7821 is available in a 20-lead TSSOP package.

特性 Features

• 2.5V to 5.5V Supply Operation
• Fast Parallel Interface: 17ns Write Cycle
• Update Rate of 20.4MSPS
• 10MHz Multiplying Bandwidth
• ±10V Reference Input
• Low Glitch Energy: 5nV-s
• Extended Temperature Range:-40°C to +125°C
• 20-Lead TSSOP Packages
• 12-Bit Monotonic
• ±1LSB INL
• 4-Quadrant Multiplication
• Power-On Reset with Brownout Detection
• Readback Function
• Industry-Standard Pin Configuration
• APPLICATIONS
• Portable Battery-Powered Instruments
• Waveform Generators
• Analog Processing
• Programmable Amplifiers and Attenuators
• Digitally-Controlled Calibration
• Programmable Filters and Oscillators
• Composite Video
• Ultrasound

简介

DAC7821属于集成电路（IC）的数模转换器（DAC）。由TI制造生产的DAC7821数模转换器（DAC）数模转换器（DAC、D/A、D2A 或 D 转 A）可将数字信号转换为缓冲或无缓冲的模拟电压或电流。DAC 架构是否适合特定应用，要取决于分辨率和采样频率。DAC 通常用于音乐播放器，将数字数据流转换为模拟音频流。它们还用于电视和手机，将数字视频数据转换为模拟视频信号，再连接到屏幕驱动器，以显示单色或彩色图像。