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AD9705-EB 데이터시트(PDF) 41 Page - Analog Devices

부품명 AD9705-EB
상세설명  8-/10-/12-/14-Bit, 175 MSPS TxDAC D/A Converters
PDF  52 Pages
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제조업체  AD [Analog Devices]
홈페이지  http://www.analog.com
Logo AD - Analog Devices

AD9705-EB 데이터시트(HTML) 41 Page - Analog Devices

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AD9704/AD9705/AD9706/AD9707
Rev. 0 | Page 41 of 52
DIFFERENTIAL BUFFERED OUTPUT
USING AN OP AMP
A dual op amp (see the circuit shown in Figure 92) can be used
in a differential version of the single-ended buffer shown in
Figure 91. 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, RFB, determine the peak differential output
voltage by the formula
FS
FB
OUT
I
R
V
×
=
The maximum and minimum voltages out of the amplifier are
)
1
(
B
FB
REF
MAX
R
R
V
V
+
×
=
OUT
MAX
MIN
V
V
V
−
=
respectively. The common-mode voltage of the output is
determined by the formula
2
OUT
MAX
CM
V
V
V
−
=
AD9704/AD9705
AD9706/AD9707
IOUTA
IOUTB
RFB
ADA4841
VOUT
REFIO 23
21
RS
OTCM 19
CF
C
ADA4841
RFB
RB
CF
RS
RB
20
Figure 92. Single-Supply Differential Buffer



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