Part # AD667 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD667 Microprocessor-Compatible 12-Bit D/A Converter


Part Details:

a Microprocessor-Compatible 12-Bit D/A Converter AD667* FEATURES FUNCTIONAL BLOCK DIAGRAM Complete 12-Bit D/A Function Double-Buffered LatchOn Chip Output AmplifierHigh Stability Buried Zener Reference Single Chip ConstructionMonotonicity Guaranteed Over TemperatureLinearity Guaranteed Over Temperature: 1/2 LSB maxSettling Time: 3 s max to 0.01%Guaranteed for Operation with 12 V or 15 V Supplies Low Power: 300 mW Including ReferenceTTL/5 V CMOS Compatible Logic InputsLow Logic Input CurrentsMIL-STD-883 Compliant Versions Available PRODUCT DESCRIPTION The AD667 is available in five performance grades. The The AD667 is a complete voltage output 12-bit digital-to-analog AD667J and K are specified for use over the 0°C to +70°C tem- converter including a high stability buried Zener voltage refer- perature range and are available in a 28-pin molded plastic DIP ence and double-buffered input latch on a single chip. The (N) or PLCC (P) package. The AD667S grade is specified for converter uses 12 precision high speed bipolar current steering the ­55°C to +125°C range and is available in the ceramic DIP switches and a laser trimmed thin-film resistor network to pro- (D) or LCC (E) package. The AD667A and B are specified for vide fast settling time and high accuracy. use over the ­25°C to +85°C temperature range and are avail- Microprocessor compatibility is achieved by the on-chip double- able in a 28-pin hermetically sealed ceramic DIP (D) package. buffered latch. The design of the input latch allows direct inter- PRODUCT HIGHLIGHTS face to 4-, 8-, 12-, or 16-bit buses. The 12 bits of data from the 1. The AD667 is a complete voltage output DAC with voltage first rank of latches can then be transferred to the second rank, reference and digital latches on a single IC chip. avoiding generation of spurious analog output values. The latchresponds to strobe pulses as short as 100 ns, allowing use with 2. The double-buffered latch structure permits direct interface the fastest available microprocessors. to 4-, 8-, 12-, or 16-bit data buses. All logic inputs are TTLor 5 volt CMOS compatible. The functional completeness and high performance in theAD667 results from a combination of advanced switch design, 3. The internal buried Zener reference is laser-trimmed to 10.00 high speed bipolar manufacturing process, and the proven laser volts with a ± 1% maximum error. The reference voltage is wafer-trimming (LWT) technology. The AD667 is trimmed at also available for external application. the wafer level and is specified to ± 1/4 LSB maximum linearity 4. The gain setting and bipolar offset resistors are matched to error (K, B grades) at +25°C and ± 1/2 LSB over the full operat- the internal ladder network to guarantee a low gain tempera- ing temperature range. ture coefficient and are laser-trimmed for minimum full-scale The subsurface (buried) Zener diode on the chip provides a low and bipolar offset errors. noise voltage reference which has long-term stability and tem- 5. The precision high speed current steering switch and on-board perature drift characteristics comparable to the best discrete ref- high speed output amplifier settle within 1/2 LSB for a 10 V


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AD667.pdf Datasheet