AD569 Analog Devices, AD569 Datasheet
AD569
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AD569 Summary of contents
Page 1
... The AD569 can oper- ate with an ac reference in multiplying applications. Data may be loaded into the AD569’s input latches from 8- and 16-bit buses. The double-buffered structure simplifies 8-bit bus interfacing and allows multiple DACs to be loaded asynchro- nously and updated simultaneously ...
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... Offset to changes in – –2– –V = –5 V, unless REF REF AD569SD Max Min Typ Max 16 16 5.5 2.0 5.5 0 0.024 0.04 0.024 0.04 1 350 500 450 750 ...
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... HBE, LBE Data Hold Time CS Setup Time CS Hold Time –3– AD569 = 1000 pF. LOAD = 0 V. DAC registers alternatively loaded REF and 0FFF (worst-case H H and –V OUT REF = 0.4 V MIN MAX Figure 2a. AD569 Timing Diagram – Case B Figure 2b. AD569 Timing Diagram – Case C ...
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... Momentary Short to +V ESD SENSITIVITY The AD569 features input protection circuitry consisting of large “distributed” diodes and polysilicon series resistors to dissipate both high-energy discharges (Human Body Model) and fast, low-energy pulses (Charged Device Model). Per Method 3015.2 of MIL-STD-883C, the AD569 has been classified as a Category A device ...
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... FUNCTIONAL DESCRIPTION The AD569 consists of two resistor strings, each of which is di- vided into 256 equal segments (see Figure 3). The 8 MSBs of the digital input word select one of the 256 segments on the first string. The taps at the top and bottom of the selected segment are connected to the inputs of the two buffer amplifiers A1 and A2 ...
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... Glitches can be due to either time skews between the input bits or charge injection from the internal switches. Glitch Impulse for the AD569 is mainly due to charge injection, and is mea- sured with the reference connections tied to ground speci- fied as the area of the glitch in nV-secs. ...
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... Figure 7. Power Supply Options REV. A ANALOG CIRCUIT CONNECTIONS The AD569 is intended for use in applications where high reso- lution and stability are critical. Designed as a multiplying D/A converter, the AD569 may be used with a fixed dc reference reference. V may be any voltage or combination of REF voltages at +V and – ...
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... As shown in Figure 11, the pin-programmable AD588 can be connected to provides tracking 5 V outputs with 1-3ppm/ C temperature stability. Buffer amplifiers are in- cluded for direct connection to the AD569. The optional gain and balance adjust trimmers allow bipolar offset and full-scale errors to be nulled. In Figure 12, the low-cost AD586 provides Figure 10 ...
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... Figure 14. Full Power Multiplying Performance REV. A Figure 13. Low-Cost 5 V Tracking Reference the midpoints of both dividers. Figure 15 illustrates the AD569’s ability to resolve 16-bits (where 1 LSB below full scale) while keeping the noise floor below –130 dB with an ac reference rms at 200 Hz input rep- ...
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... Figure 17. Lowband Noise Spectrum Figure 18. Wideband Noise Spectrum DIGITAL CIRCUIT CONNECTIONS The AD569’s truth table appears in Table I. The High Byte En- able (HBE) and Low Byte Enable (LBE) inputs load the upper and lower bytes of the 16-bit input when Chip Select (CS) is valid (low) ...
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... AD630 at a gain of +1. The lower AD7820 quantizes the signal to the 8-bit level within 1.4 s, and the 8-bit result is routed to the AD569 via a digital latch which holds the 8-bit word for the AD569 and the output logic. The AD569’s reference polarity is reversed so that a full-scale output is – ...
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... AD569 Preceding the second flash, the residue signal must be amplified by a factor of 256. The OP37 provides a gain of 25.6 and the AD630 provides another gain of 10. In this case, the AD630 acts as a gain element as well as a channel control switch. The 28-Pin Ceramic DIP (D) second flash conversion yields a 9-bit word ...