AD569 데이터 시트보기 (PDF) - Analog Devices

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AD569

16-Bit Monotonic Voltage Output D/A Converter

Analog Devices 

AD569

Figure 13. Low-Cost ±5 V Tracking Reference

MULTIPLYING PERFORMANCE

Figure 14 illustrates the gain and phase characteristics of the

AD569 when operated in the multiplying mode. Full-power

bandwidth is shown in Figure 14a and the corresponding phase

shift is shown in Figure 14b. Performance is plotted for both a

full-scale input of FFFFH and an input of 8080H. An input rep-

resents worst-case conditions because it places the buffer taps at

the midpoints of both dividers. Figure 15 illustrates the

AD569’s ability to resolve 16-bits (where 1 LSB is 96 dB below

full scale) while keeping the noise floor below –130 dB with an

ac reference of 1 V rms at 200 Hz.

Multiplying feedthrough is due to capacitive coupling between

the reference inputs and the output. As shown in Figure 16,

a. Bandwidth

a. Time Domain

b. Phase Shift

Figure 14. Full Power Multiplying Performance

REV. A

b. Frequency Domain

Figure 15. Multiplying Mode Performance (Input Code

0001H)

–9–

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