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AD7538AQ Datasheet(PDF) 1 Page - Analog Devices |
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AD7538AQ Datasheet(HTML) 1 Page - Analog Devices |
1 / 8 page FUNCTIONAL BLOCK DIAGRAM 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 P-Compatible 14-Bit DAC AD7538 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 FEATURES All Grades 14-Bit Monotonic Over the Full Temperature Range Low Cost 14-Bit Upgrade for 12-Bit Systems 14-Bit Parallel Load with Double Buffered Inputs Small 24-Pin, 0.3 DIP and SOIC Low Output Leakage (<20 nA) Over the Full Temperature Range APPLICATIONS Microprocessor Based Control Systems Digital Audio Precision Servo Control Control and Measurement in High Temperature Environments GENERAL DESCRIPTION The AD7538 is a 14-bit monolithic CMOS D/A converter which uses laser trimmed thin-film resistors to achieve excellent linearity. The DAC is loaded by a single 14-bit wide word using standard Chip Select and Memory Write Logic. Double buffering, which is optional using LDAC, allows simultaneous update in a sys- tem containing multiple AD7538s. A novel low leakage configuration (U.S. Patent No. 4,590,456) enables the AD7538 to exhibit excellent output leakage current characteristics over the specified temperature range. The AD7538 is manufactured using the Linear Compatible CMOS (LC 2MOS) process. It is speed compatible with most microprocessors and accepts TTL or CMOS logic level inputs. PRODUCT HIGHLIGHTS 1. Guaranteed Monotonicity The AD7538 is guaranteed monotonic to 14-bits over the full temperature range for all grades. 2. Low Cost The AD7538, with its 14-bit dynamic range, affords a low cost solution for 12-bit system upgrades. 3. Small Package Size The AD7538 is packaged in a small 24-pin, 0.3" DIP and a 24-pin SOIC. 4. Low Output Leakage By tying VSS (Pin 24) to a negative voltage, it is possible to achieve a low output leakage current at high temperatures. 5. Wide Power Supply Tolerance The device operates on a +12 V to +15 V VDD, with a ±5% tolerance on this nominal figure. All specifications are guaranteed over this range. |
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