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AD566ATD Folha de dados(PDF) 1 Page - Analog Devices |
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AD566ATD Folha de dados(HTML) 1 Page - Analog Devices |
1 / 11 page FUNCTIONAL BLOCK DIAGRAMS 19.95k 20k 0.5mA IREF DAC IOUT = 4 IREF CODE AD565A 9.95k 5k 8k IO 20V SPAN 10V SPAN DAC OUT POWER GND –VEE REF GND BIPOLAR OFF 5k CODE INPUT LSB MSB 10V VCC REF OUT REF IN 19.95k 20k 0.5mA IREF DAC IOUT = 4 IREF CODE AD566A 9.95k 5k 8k IO 20V SPAN 10V SPAN DAC OUT POWER GND –VEE REF GND BIPOLAR OFF 5k CODE INPUT LSB MSB REF IN REV. D 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 High Speed 12-Bit Monolithic D/A Converters AD565A*/AD566A* FEATURES Single Chip Construction Very High-Speed Settling to 1/2 LSB AD565A: 250 ns max AD566A: 350 ns max Full-Scale Switching Time: 30 ns Guaranteed for Operation with 12 V Supplies: AD565A with –12 V Supply: AD566A Linearity Guaranteed Over Temperature: 1/2 LSB max (K, T Grades) Monotonicity Guaranteed Over Temperature Low Power: AD566A = 180 mW max; AD565A = 225 mW max Use with On-Board High-Stability Reference (AD565A) or with External Reference (AD566A) Low Cost MlL-STD-883-Compliant Versions Available PRODUCT DESCRIPTION The AD565A and AD566A are fast 12-bit digital-to-analog converters that incorporate the latest advances in analog circuit design to achieve high speeds at low cost. The AD565A and AD566A use 12 precision, high-speed bipolar current-steering switches, control amplifier and a laser-trimmed thin-film resistor network to produce a very fast, high accuracy analog output current. The AD565A also includes a buried Zener reference that features low-noise, long-term stability and temperature drift characteristics comparable to the best discrete reference diodes. The combination of performance and flexibility in the AD565A and AD566A has resulted from major innovations in circuit design, an important new high-speed bipolar process, and con- tinuing advances in laser-wafer-trimming techniques (LWT). The AD565A and AD566A have a 10–90% full-scale transition time less than 35 ns and settle to within ±1/2 LSB in 250 ns max (350 ns for AD566A). Both are laser-trimmed at the wafer level to ±1/8 LSB typical linearity and are specified to ±1/4 LSB max error (K and T grades) at +25 °C. High speed and accuracy make the AD565A and AD566A the ideal choice for high-speed display drivers as well as fast analog-to-digital converters. The laser trimming process which provides the excellent linear- ity is also used to trim both the absolute value and the tempera- ture coefficient of the reference of the AD565A resulting in a typical full-scale gain TC of 10 ppm/ °C. When tighter TC per- formance is required or when a system reference is available, the AD566A may be used with an external reference. *Covered by Patent Nos.: 3,803,590; RE 28,633; 4,213,806; 4,136,349; 4,020,486; 3,747,088. AD565A and AD566A are available in four performance grades. The J and K are specified for use over the 0 °C to +70°C temperature range while the S and T grades are specified for the –55 °C to +125°C range. The D grades are all packaged in a 24-lead, hermetically sealed, ceramic, dual-in-line package. The JR grade is packaged in a 28-lead plastic SOIC. PRODUCT HIGHLIGHTS 1. The wide output compliance range of the AD565A and AD566A are ideally suited for fast, low noise, accurate volt- age output configurations without an output amplifier. 2. The devices incorporate a newly developed, fully differential, nonsaturating precision current switching cell structure which combines the dc accuracy and stability first developed in the AD562/3 with very fast switching times and an optimally-damped settling characteristic. 3. The devices also contain SiCr thin film application resistors which can be used with an external op amp to provide a precision voltage output or as input resistors for a successive approximation A/D converter. The resistors are matched to the internal ladder network to guarantee a low gain tempera- ture coefficient and are laser-trimmed for minimum full-scale and bipolar offset errors. 4. The AD565A and AD566A are available in versions compli- ant with MIL-STD-883. Refer to the Analog Devices Mili- tary Products Databook or current /883B data sheet for detailed specifications. 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 |
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