DAC7822中文资料12 位双通道并行输入乘法数模转换器数据手册TI规格书

描述 Description

The DAC7822 is a dual, CMOS, 12-bit, current output digital-to-analog converter (DAC). This device operates from a 2.5V to 5.5V power supply, making it suitable for battery-powered and many other applications.The DAC7822 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 DAC7822 offers excellent 4-quadrant multiplication characteristics, with 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 DAC7822 also includes the resistors necessary for 4-quadrant multiplication and other configuration modes. The DAC7822 is available in a 40-lead QFN package.

特性 Features

• ±1LSB INL
• 2.5V to 5.5V Supply Operation
• Fast Parallel Interface: 17ns Write Cycle
• Update Rate of 20.4MSPS
• 10MHz Multiplying Bandwidth
• ±15V Reference Input
• Extended Temperature Range: -40°C to +125°C
• 40-Lead QFN
• 12-Bit Monotonic
• 4-Quadrant Multiplication
• Power-On Reset with Brownout Detection
• Readback Function
• Industry-Standard Pin Configuration
• Pin-Compatible with the AD5405
• APPLICATIONS
• Portable Battery-Powered Instruments
• Waveform Generators
• Analog Processing
• Programmable Amplifiers and Attenuators
• Digitally-Controlled Calibration
• Programmable Filters and Oscillators
• Ultrasound