AD7243

a 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 T MIN to T MAX Low Power Dissipation: 100 mW Typical APPLICATIONS Process Control Industrial Automation Digital Signal Processing Systems Input/Output Ports REFOUT LC2MOS 12-Bit Serial DACPORT AD7243 FUNCTIONAL BLOCK DIAGRAM VDD 2R R OFS 2R VOUT 12 - BIT DAC REFIN 12 AGND AD7243 DAC LATCH 12 DGND INPUT SHIFT REGISTER VSS SDIN CLR BIN/ SCLK SYNC LDAC DCEN SDO COMP GENERAL DESCRIPTION The AD7243 is a complete 12-bit, voltage output, digital-toanalog 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 kΩ 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. ...