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AD394KD Datasheet(PDF) 1 Page - Analog Devices |
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AD394KD Datasheet(HTML) 1 Page - Analog Devices |
1 / 12 page µP-Compatible Multiplying Quad 12-Bit D/A Converter AD394 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 that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. FEATURES Four, complete, 12-bit CMOS DACs with buffer registers Linearity error: ±1/2 LSB TMIN, TMAX (AD394T) Factory-trimmed gain and offset Precision output amplifiers for VOUT Full four-quadrant multiplication per DAC Monoticity guaranteed over full temperature range Fast settling: 15 µs maximum to ±1/2 LSB Available in MIL-STD-883B PRODUCT DESCRIPTION The AD394 contains four 12-bit, high-speed, low power, voltage output, multiplying digital-to-analog converters in a compact 28-pin hybrid package. The design is based on a proprietary, latched, 12-bit, CMOS DAC chip, which reduces chip count and provides high reliability. The AD394 is ideal for systems requiring digital control of many analog voltages where board space is at a premium and low power consumption is a neces- sity. Such applications include automatic test equipment, process controllers, and vector stroke displays. The AD394 is laser-trimmed to ±1/2 LSB maximum differential and integral linearity (AD394T) and full-scale accuracy of ±0.05 percent at 25°C. The high initial accuracy is possible because of the use of precision, laser-trimmed, thin-film scaling resistors. The individual DAC registers are accessed by the CS1 through CS4 control pins. These control signals allow any combination of the DAC select matrix to occur (see Table 3). Once selected, the DAC is loaded with a single 12-bit wide word. The 12-bit parallel digital input interfaces to most 12- and 16-bit bus systems. The AD394 outputs (VREFIN = 10 V) provide a ±10 V bipolar output range with positive-true offset binary input coding. The AD394 is packaged in a 28-lead ceramic package and is available for operation over a −55°C to +125°C temperature range. Figure 1. Functional Block Diagram PRODUCT HIGHLIGHTS 1. The AD394 offers a dramatic reduction in printed circuit board space in systems using multiple low power DACs. 2. Each DAC is independently addressable and provides versatile control architecture for a simple interface to microprocessors. All latch enable signals are level- triggered. 3. The output voltage is trimmed to a full-scale accuracy of ±0.05%. Settling time to ±1/2 LSB is 15 µs maximum. 4. A maximum gain TC of 5 ppm/°C is achievable. 5. Two- or four-quadrant multiplication can be achieved simply by applying the appropriate input voltage signal to the selected DAC's reference (VREFIN). 6. The AD394TD features guaranteed accuracy and linearity over the −55°C to +125°C temperature range. |
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