EVAL-AD5780SDZ View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'EVAL-AD5780SDZ' PDF : 28 Pages View PDF
AD5780
Gain of Two Configuration (×2 Gain Mode)
Figure 53 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 × VREFN −
VREFP to VREFP. This configuration is used to generate a bipolar
output span from a single-ended reference input, with VREFN =
0 V. For this mode of operation, the RBUF bit of the control
register must be cleared to Logic 0.
Data Sheet
VREFP
A1
R1
RFB RFB
6.8kΩ 6.8kΩ
10pF
18-BIT
DAC
INV
VOUT
AD5780
VOUT
AD8675,
ADA4898-1,
ADA4004-1
VREFN
Figure 53. Output Amplifier in Gain-of-Two Configuration
Rev. F | Page 24 of 27
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