AD5780ACPZ AD [Analog Devices], AD5780ACPZ Datasheet - Page 25

• Manufacturer Part Number: AD5780ACPZ
• Manufacturer: AD [Analog Devices]

Data Sheet
Gain of Two Configuration (×2 Gain Mode)
Figure 54 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
V
output span from a single-ended reference input, with V
0 V. For this mode of operation, the RBUF bit of the control
register must be cleared to Logic 0.
REFP
to V
REFP
. This configuration is used to generate a bipolar
REFN
REFN
=
Rev. C | Page 25 of 28
−
Figure 54. Output Amplifier in Gain-of-Two Configuration
V
V
REFN
REFP
18-BIT
DAC
A1
6.8kΩ 6.8kΩ
R1
AD5780
R
FB
V
R
OUT
INV
FB
AD8675,
ADA4898-1,
ADA4004-1
10pF
AD5780
V
OUT