AD9704-EB Analog Devices Inc, AD9704-EB Datasheet - Page 41

• Manufacturer Part Number: AD9704-EB
• Description: BOARD EVAL FOR AD9704
• Manufacturer: Analog Devices Inc

Specifications of AD9704-EB

• Module/board Type: Evaluation Board
• For Use With/related Products: AD9704
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

DIFFERENTIAL BUFFERED OUTPUT
USING AN OP AMP
A dual op amp (see the circuit shown in Figure 91) can be used
in a differential version of the single-ended buffer shown in
Figure 90. The same R-C network is used to form a 1-pole
differential, low-pass filter to isolate the op amp inputs from the
high frequency images produced by the DAC outputs. The feed-
back resistors, R
formula
The maximum and minimum voltages out of the amplifier are,
respectively,
The common-mode voltage of the output is determined by the
formula
V
V
V
V
OUT
MIN
MAX
CM
= V
= R
=
=
V
V
FB
MAX
MAX
REF
× I
FB
− V
, determine the peak signal swing by the
−
×
FS
V
⎛
⎜
⎜
⎝
1
OUT
OUT
2
+
R
R
FB
B
⎞
⎟
⎟
⎠
Rev. A | Page 41 of 52
AD9704/AD9705
AD9706/AD9707
AD9704/AD9705/AD9706/AD9707
IOUTA
IOUTB
REFIO
OTCM
Figure 91. Single-Supply Differential Buffer
21
19
23
20
R
S
R
S
R
C
R
B
B
ADA4841-2
ADA4841-2
–
+
+
–
R
R
C
C
FB
FB
F
F
V
OUT