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AD566A Datasheet(PDF) 1 Page - Analog Devices |
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AD566A Datasheet(HTML) 1 Page - Analog Devices |
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1 / 12 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. E 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. 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 (565A) Supplies, with –12 V Supply (AD566A) Linearity Guaranteed Overtemperature 1/2 LSB max (K, T Grades) Monotonicity Guaranteed Overtemperature 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, a 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 continuing 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 for fast analog-to-digital converters. The laser trimming process that provides the excellent linearity is also used to trim both the absolute value and the temperature coefficient of the reference of the AD565A, resulting in a typical full-scale gain TC of 10 ppm/ °C. When tighter TC performance is required or when a system reference is available, the AD566A may be used with an external reference. AD565A and AD566A are available in four performance grades. The J and K grades are specified for use over the 0 °C to +70 °C temperature range while the S and T grades are speci- fied for the –55 °C to +125°C range. The D grades are all pack- aged 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 voltage output configurations without an output amplifier. 2. The devices incorporate a newly developed, fully differential, nonsaturating precision current switching cell structure that combines the dc accuracy and stability first developed in the AD562/AD563 with very fast switching times and an optimally damped settling characteristic. 3. The devices also contain SiCr thin-film application resistors that can be used with an external op amp to provide a preci- sion 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 temperature coefficient and are laser-trimmed for minimum full-scale and bipolar offset errors. 4. The AD565A and AD566A are available in versions compliant with MIL-STD-883. Refer to the Analog Devices Military 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 www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2002 |
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