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DAC8426 Datasheet(PDF) 1 Page - Analog Devices |
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DAC8426 Datasheet(HTML) 1 Page - Analog Devices |
1 / 12 page REV. C 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 Quad 8-Bit Voltage Out CMOS DAC Complete with Internal 10 V Reference DAC8426 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 GENERAL DESCRIPTION The DAC8426 is a complete quad voltage output D/A converter with internal reference. This product fits directly into any exist- ing 7226 socket where the user currently has a 10 V external reference. The external reference is no longer necessary. The internal reference of the DAC8426 is laser-trimmed to ±0.4% FEATURES No Adjustments Required, Total Error 1 LSB Max Over Temperature Four Voltage-Output DACs on a Single Chip Internal 10 V Bandgap Reference Operates from Single 15 V Supply Fast 50 ns Data Load Time, All Temperatures Pin-for-Pin Replacement for PM-7226 and AD7226, Eliminates External Reference APPLICATIONS Process Controls Multichannel Microprocessor Controlled: System Calibration Op Amp Offset and Gain Adjust Level and Threshold Setting offering a 25 ppm/ °C temperature coefficient and 5 mA of exter- nal load driving capability. The DAC8426 contains four 8-bit voltage-output CMOS D/A converters on a single chip. A 10 V output bandgap reference sets the output full-scale voltage. The circuit also includes four input latches and interface control logic. One of the four latches, selected by the address inputs, is loaded from the 8-bit data bus input when the write strobe is active low. All digital inputs are TTL/CMOS (5 V) compatible. The on-board amplifiers can drive up to 10 mA from either a single or dual supply. The on-board reference that is always connected to the internal DACs has 5 mA available to drive external devices. Its compact size, low power, and economical cost-per-channel, make the DAC8426 attractive for applications requiring mul- tiple D/A converters without sacrificing circuit-board space. Sys- tem reliability is also increased due to reduced parts count. PMI’s advanced oxide-based, silicon-gate, CMOS process al- lows the DAC8426’s analog and digital circuitry to be manufac- tured on the same chip. This, coupled with PMI’s highly stable thin-film R-2R resistor ladder, aids in matching and tempera- ture tracking between DACs. FUNCTIONAL BLOCK DIAGRAM |
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