EVAL-AD5781SDZ Analog Devices Inc, EVAL-AD5781SDZ Datasheet - Page 25
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EVAL-AD5781SDZ
Manufacturer Part Number
EVAL-AD5781SDZ
Description
18-BIT ADC Evaluation Board
Manufacturer
Analog Devices Inc
Specifications of EVAL-AD5781SDZ
Silicon Manufacturer
Analog Devices
Application Sub Type
DAC
Kit Application Type
Data Converter
Silicon Core Number
AD5781
Features
PC Software For Control
Mcu Supported Families
AD5781
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Gain of Two Configuration
Figure 50 shows an output amplifier configured for a gain of
two. The gain is set by the internal matched 6.8 kΩresistors,
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
=
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−
1/2 AD8676
1/2 AD8676
V
V
Figure 50. Output Amplifier in Gain of Two Configuration
V
REFPF
REFNF
REFN
V
REFP
18-BIT
= 0V
DAC
V
V
REFNS
REFPS
A1
6.8kΩ 6.8kΩ
R
1
AD5781
R
FB
V
R
INV
OUT
FB
10pF
AD8675,
ADA4898-1,
ADA4004-1
AD5781
V
OUT