EVAL-AD5781SDZ Analog Devices Inc, EVAL-AD5781SDZ Datasheet - Page 25

• 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 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. 0 | Page 25 of 28
−
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