Datasheet

Data Sheet AD5760
Rev. D | Page 25 of 28
Gain of Two Configuration (×2 Gain Mode)
Figure 52 shows an output amplifier configured for a gain of
two. The gain is set by the internal matched 6.8 kΩ resistors,
which are exactly twice the DAC resistance, having the effect
of removing an offset from the input bias current of the external
amplifier. In this configuration, the output spans from 2 × V
REFN
−
V
REFP
to V
REFP
. This configuration is used to generate a bipolar
output span from a single-ended reference input, with V
REFN
=
0 V. For this mode of operation, the RBUF bit of the control
register must be cleared to Logic 0.
A1
6.8kΩ 6.8kΩ
R1 R
FB
V
REFP
R
FB
INV
V
OUT
V
OUT
10pF
16-BIT
DAC
V
REFN
AD5760
AD8675
ADA4898-1
ADA4004-1
09650-054
Figure 52. Output Amplifier in Gain of Two Configuration