AD5780 Analog Devices, AD5780 Datasheet - Page 25
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AD5780
Manufacturer Part Number
AD5780
Description
Manufacturer
Analog Devices
Datasheet
1.AD5780.pdf
(28 pages)
Specifications of AD5780
Resolution (bits)
18bit
Dac Settling Time
2.5µs
Max Pos Supply (v)
+16.5V
Single-supply
No
Dac Type
Voltage Out
Dac Input Format
Ser
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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. B | 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