Datasheet

AD5725 Data Sheet
Rev. C | Page 18 of 20
Figure 29 shows the AD5725 configured for −10 V to 0 V
operation. An ADR01 and OP1177 are configured to produce a
−10 V output, which is connected directly to V
REFP
for the
reference voltage.
06442-009
AD5725
0.2µF
0V TO –10V OPERATION
U2
+15V
–15V
–15V
U1
ADR01
TEMP
GND
+15V
+15V
OP1177
V+
V–
V
OUT
V
IN
TRIM
AV
DD
V
REFP
V
REFN
AV
SS
10µF
0.1µF
10µF
0.1µF
Figure 29. Unipolar −10 V Operation
SINGLE +5 V SUPPLY OPERATION
For operation with a +5 V supply, the reference voltage should
be set between +1.0 V and +2.5 V for optimum linearity. Figure 30
shows an ADR03 used to supply a +2.5 V reference voltage. The
headroom of the reference and DAC are both sufficient to support
a +5 V supply with ±5 V tolerance. AV
DD
and V
L
should be
connected to the same supply. Separate bypassing to each pin
should be used.
+5V
10µF
0.01µF
INPUT
OUTPUT
GND
TRIM
0.2µF
ADR03
AD5725
AV
DD
AV
SS
V
REFP
V
REFN
0V TO 2.5V OPERATION
SINGLE 5V SUPPLY
10kΩ
06442-010
10µF
0.1µF
10µF
0
.1µ
F
+15V
–15V
Figure 30. +5 V Single-Supply Operation