AD5791 Analog Devices, AD5791 Datasheet - Page 26

• Manufacturer Part Number: AD5791
• Manufacturer: Analog Devices

Specifications of AD5791

• Resolution (bits): 20bit
• Dac Update Rate: 1MSPS
• Dac Settling Time: 1µs
• Max Pos Supply (v): +16.5V
• Single-supply: No
• Dac Type: Unbuffered Vout
• Dac Input Format: Ser,SPI

AD5791
Gain of Two Configuration
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
bipolar output span from a single ended reference input with
V
control register must be cleared to Logic 0.
REFN
REFN
= 0 V. For this mode of operation, the RBUF bit of the
− V
REFP
to V
REFP
. This configuration is used to generate a
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1/2 AD8676
Figure 54. Output Amplifier in Gain of Two Configuration
V
V
V
REFPF
REFNF
REFN
V
REFP
20-BIT
= 0V
DAC
V
V
REFNS
REFPS
A1
6.8kΩ 6.8kΩ
R
1
AD5791
R
FB
V
R
OUT
INV
FB
Data Sheet
10pF
AD8675,
ADA4898-1
V
OUT