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AD667KN bảng dữ liệu(PDF) 1 Page - Analog Devices |
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AD667KN bảng dữ liệu(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 Microprocessor-Compatible 12-Bit D/A Converter AD667* One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 FEATURES Complete 12-Bit D/A Function Double-Buffered Latch On Chip Output Amplifier High Stability Buried Zener Reference Single Chip Construction Monotonicity Guaranteed Over Temperature Linearity Guaranteed Over Temperature: 1/2 LSB max Settling Time: 3 s max to 0.01% Guaranteed for Operation with 12 V or 15 V Supplies Low Power: 300 mW Including Reference TTL/5 V CMOS Compatible Logic Inputs Low Logic Input Currents MIL-STD-883 Compliant Versions Available PRODUCT DESCRIPTION The AD667 is a complete voltage output 12-bit digital-to-analog converter including a high stability buried Zener voltage refer- ence and double-buffered input latch on a single chip. The converter uses 12 precision high speed bipolar current steering switches and a laser trimmed thin-film resistor network to pro- vide fast settling time and high accuracy. Microprocessor compatibility is achieved by the on-chip double- buffered latch. The design of the input latch allows direct inter- face to 4-, 8-, 12-, or 16-bit buses. The 12 bits of data from the first rank of latches can then be transferred to the second rank, avoiding generation of spurious analog output values. The latch responds to strobe pulses as short as 100 ns, allowing use with the fastest available microprocessors. The functional completeness and high performance in the AD667 results from a combination of advanced switch design, high speed bipolar manufacturing process, and the proven laser wafer-trimming (LWT) technology. The AD667 is trimmed at the wafer level and is specified to ±1/4 LSB maximum linearity error (K, B grades) at +25 °C and ±1/2 LSB over the full operat- ing temperature range. The subsurface (buried) Zener diode on the chip provides a low noise voltage reference which has long-term stability and tem- perature drift characteristics comparable to the best discrete ref- erence diodes. The laser trimming process which provides the excellent linearity, is also used to trim the absolute value of the reference as well as its temperature coefficient. The AD667 is thus well suited for wide temperature range performance with ±1/2 LSB maximum linearity error and guaranteed monotonic- ity over the full temperature range. Typical full-scale gain TC is 5 ppm/ °C. *Protected by Patent Numbers 3,803,590; 3,890,611; 3,932,863; 3,978,473; 4,020,486; and others pending. The AD667 is available in five performance grades. The AD667J and K are specified for use over the 0 °C to +70°C tem- perature range and are available in a 28-pin molded plastic DIP (N) or PLCC (P) package. The AD667S grade is specified for the –55 °C to +125°C range and is available in the ceramic DIP (D) or LCC (E) package. The AD667A and B are specified for use over the –25 °C to +85°C temperature range and are avail- able in a 28-pin hermetically sealed ceramic DIP (D) package. PRODUCT HIGHLIGHTS 1. The AD667 is a complete voltage output DAC with voltage reference and digital latches on a single IC chip. 2. The double-buffered latch structure permits direct interface to 4-, 8-, 12-, or 16-bit data buses. All logic inputs are TTL or 5 volt CMOS compatible. 3. The internal buried Zener reference is laser-trimmed to 10.00 volts with a ±1% maximum error. The reference voltage is also available for external application. 4. The gain setting and bipolar offset 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. 5. The precision high speed current steering switch and on-board high speed output amplifier settle within 1/2 LSB for a 10 V full-scale transition in 2.0 µs as when properly compensated. 6. The AD667 is available in versions compliant with MIL- STD-883. Refer to the Analog Devices Military Products Databook or current AD667/883B data sheet for detailed specifications. |
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Mô tả tương tự - AD667KN |
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