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5-14
RF2422
Rev A6 060203
Application Schematic
AC-Coupled
Pin
Function
Description
Interface Schematic
16
I SIG
Baseband input to the I mixer. This pin is DC-coupled. Maximum output
power is obtained when the input signal has a peak to peak amplitude
of 2V. The recommended DC level for this pin is 3.0V. The peak mini-
mum voltage on this pin (VREF - peak modulation amplitude) should
never drop below 2.0V. The peak maximum voltage on this pin (VREF +
peak modulation amplitude) should never exceed 4.0V.
See pin 1.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
S
POWER
CONTROL
100 nF
100 nF
PD
LO IN
V
REF
I SIG
100 nF
RF OUT
NOTE:
The values of R and C depend on the minimum
baseband frequency (i.e., the cutoff frequency of
this high pass filter should be lower than the
lowest frequency component in the I/Q spectrum).
Q SIG
-45°
+45°
C
R
R
R
R
V
CC
V
CC
C
C
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