AD586

REV. C

–5–

Output turn-on time is modified when an external noise reduc-

tion capacitor is used. When present, this capacitor acts as an

additional load to the internal Zener diode’s current source, re-

sulting in a somewhat longer turn-on time. In the case of a 1

µF

capacitor, the initial turn-on time is approximately 400 ms to

0.01% (see Figure 5c).

Figure 5. Turn-On Characteristics

DYNAMIC PERFORMANCE

The output buffer amplifier is designed to provide the AD586

with static and dynamic load regulation superior to less com-

plete references.

Many A/D and D/A converters present transient current loads

to the reference, and poor reference response can degrade the

converter’s performance.

Figure 6 displays the characteristics of the AD586 output ampli-

fier driving a 0 mA to 10 mA load.