ad8343-evalz Analog Devices, Inc., ad8343-evalz Datasheet - Page 17

• Manufacturer Part Number: ad8343-evalz
• Description: Dc-to-2.5 Ghz High Ip3 Active Mixer
• Manufacturer: Analog Devices, Inc.

AC INTERFACES
Because of the AD8343’s wideband design, there are several
points to consider in its ac implementation; the basic ac signal
connection diagram shown in Figure 55 summarizes these
points. The input signal undergoes a single-ended to differential
conversion and is then reactively matched to the impedance
presented by the emitters of the core. The matching network
also provides bias currents to these emitters. Similarly, the LO
input undergoes a single-ended-to-differential transformation
before it is applied to the 50 Ω differential LO port. The differential
output signal currents appear at open-collectors and are reac-
tively matched and converted to a single-ended signal.
Rev. B | Page 17 of 32
SINGLE-ENDED-TO-DIFFERENTIAL
LO INPUT SIGNAL
CONVERSION
SINGLE-ENDED
Figure 55. Basic AC Signal Connection Diagram
10
4
6
9
DCPL
PWDN
LOIP
LOIM
VPOS
5
CELL
BIAS
DRIVER
LO
SINGLE-ENDED-TO-DIFFERENTIAL
1
7
COMM
CORE BIAS NETWORK
INPUT MATCHING
8
SINGLE-ENDED
INPUT SIGNAL
DIFFERENTIAL-TO-SINGLE-ENDED
2
CONVERSION
INPP
NETWORK
11
OUTPUT MATCHING NETWORK
14
CORE BIAS NETWORK
CONVERSION
3
AD8343
INPM
CORE
OUTM
OUTP
OUTPUT SIGNAL
SINGLE-ENDED
AD8343
13
12