GENERAL DESCRIPTION

The AD7243 is a complete 12-bit, voltage output, digital-to-analog converter with output amplifier and Zener voltage reference on a monolithic CMOS chip. No external trims are required to achieve full specified performance.

The output amplifier is capable of developing +10 V across a 2 k? load. The output voltage ranges with single supply operation are 0 V to +5 V or 0 V to +10 V, while an additional bipolar ±5 V output range is available with dual supplies. The ranges are selected using the internal gain resistor.

The data format is natural binary in both unipolar ranges, while either offset binary or two’s complement format may be selected in the bipolar range. A CLR function is provided which sets the output to 0 V in both unipolar ranges and in the two’s complement bipolar range, while with offset binary data format, the output is set to –REFIN. This function is useful as a power-on reset as it allows the output to be set to a known voltage level.

FEATURES

12-Bit CMOS DAC with

On-Chip Voltage Reference

Output Amplifier

Three Selectable Output Ranges

–5 V to +5 V, 0 V to +5 V, 0 V to +10 V

Serial Interface

300 kHz DAC Update Rate

Small Size: 16-Lead DIP or SOIC

Nonlinearity: ±1/2 LSB TMIN to TMAX

Low Power Dissipation: 100 mW Typical

APPLICATIONS

Process Control

Industrial Automation

Digital Signal Processing Systems

Input/Output Ports

AD7243AR屬于集成電路（IC） > 數(shù)模轉(zhuǎn)換器（DAC）。亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD7243AR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(hào)轉(zhuǎn)換為緩沖或無(wú)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(lè)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(jī)，將數(shù)字視頻數(shù)據(jù)轉(zhuǎn)換為模擬視頻信號(hào)，再連接到屏幕驅(qū)動(dòng)器，以顯示單色或彩色圖像。