AD831 Analog Devices, AD831 Datasheet - Page 12
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AD831
Manufacturer Part Number
AD831
Description
High-Performance, Low Distortion 500-MHz Mixer
Manufacturer
Analog Devices
Datasheet
1.AD831.pdf
(16 pages)
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AD831
Connections Quadrature Demodulation
Two AD831 mixers may have their RF inputs connected in par-
allel and have their LO inputs driven in phase quadrature (Fig-
ure 27) to provide demodulated in-phase (I) and quadrature
INPUT
IF
51.1
Figure 27. Connections for Quadrature Demodulation
0.1µF
0.1µF
0.1µF
0.1µF
–5V
–5V
–5V
–5V
+5V
+5V
4
5
6
7
8
4
5
6
7
8
0.1µF
0.1µF
RFP
GND
VN
RFN
VN
RFP
GND
VN
RFN
VN
VP
VP
3
9
3
9
AN
AN
50
50
LO INPUT
LO INPUT
–10 dBm
–10 dBm
AT 90
LON
LON
AT 0
10
10
2
2
–12–
IFN
51.1
IFN
51.1
C
C
F
F
+5V
+5V
LOP
11
LOP
11
1
1
(Q) outputs. The mixers’ inputs may be connected in parallel
and a single termination resistor used if the mixers are located in
close proximity on the PC board.
VP
VP
Top View
Top View
C
C
0.1µF
AD831
0.1µF
AD831
F
F
+5V
+5V
VP
12
20
VP
12
20
0.1µF
0.1µF
IFP
IFP
50
50
GND
GND
19
13
19
13
AP
AP
BIAS
BIAS
COM
COM
VFB
OUT
VFB
OUT
VN
VN
18
17
16
15
14
18
17
16
15
14
NC
NC
0.1µF
0.1µF
–5V
–5V
DEMODULATED
QUADRATURE
OUTPUT
DEMODULATED
IN-PHASE
OUTPUT
REV. B