Datasheet

AD569
REV. A
–8–
Figure 9. MSB Resistor Divider
Figure 10. Reference Buffer Amplifier Connections
Figure 11. Ultralow Drift ± 5 V Tracking Reference
Figure 12. Low-Cost ± 5 V Reference
+5 V reference. A dual op amp, the AD712, buffers the refer-
ence input terminals preserving the absolute accuracy of the
AD569. The optional noise-reduction capacitor and gain
adjust trimmer allow further elimination of errors. The low-
cost AD584 offers 2.5 V, 5 V, 7.5 V, and 10 V options and
can be connected for ±5 V tracking outputs as shown in Figure
13. Again, an AD712 is used to buffer the reference input
terminals.
Figures 11, 12, and 13 show reference configurations for various
output ranges. 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