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AD7243ARZ Arkusz danych(PDF) 1 Page - Analog Devices |
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AD7243ARZ Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 12 page REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a LC2MOS 12-Bit Serial DACPORT AD7243 FUNCTIONAL BLOCK DIAGRAM INPUT SHIFT REGISTER DAC LATCH 12 - BIT DAC 12 12 AGND DGND REFOUT REFIN SDIN CLR SCLK DCEN SDO ROFS VOUT VSS VDD 2R 2R AD7243 BIN/ COMP SYNC LDAC 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 GENERAL DESCRIPTION The AD7243 is a complete 12-bit, voltage output, digital-to- analog converter with output amplifier and Zener voltage refer- ence 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 Ω load. The output voltage ranges with single supply opera- tion are 0 V to +5 V or 0 V to +10 V, while an additional bipo- lar ±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 comple- ment 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. The AD7243 features a fast versatile serial interface which allows easy connection to both microcomputers and 16-bit digi- tal signal processors with serial ports. The serial data may be applied at rates up to 5 MHz allowing a DAC update rate of 300 kHz. A serial data output capability is also provided which allows daisy chaining in multi-DAC systems. This feature allows any number of DACs to be used in a system with a simple 4-wire interface. All DACs may be updated simultaneously using LDAC. The AD7243 is fabricated on Linear Compatible CMOS (LC2MOS), an advanced, mixed technology process. It is pack- aged in 16-lead DIP and 16-lead SOIC packages. PRODUCT HIGHLIGHTS 1. Complete 12-Bit DACPORT® The AD7243 is a complete, voltage output, 12-bit DAC on a single chip. The single chip design is inherently more reliable than multichip designs. 2. Single or Dual Supply Operation. 3. Minimum 3-wire interface to most DSP processors. 4. DAC Update Rate–300 kHz. 5. Serial Data Output allows easy daisy-chaining in multiple DAC systems. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2000 DACPORT is a registered trademark of Analog Devices, Inc. |
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