Preliminary
6-52
RF2642
Rev A2 010720
6
*See parameter specifications for conditions.
Pin
Function
Description
Interface Schematic
10
IF-
Balanced IF Input Pin. This pin is internally DC-biased and should be
DC-blocked if connected to a device with a DC level present. For single-
ended input operation, one pin is used as an input and the other IF
input is AC coupled to ground. The input impedance is 250
Ω in both
the balanced and single-ended modes.
11
IF+
Same as pin 10, except complementary input.
12
GND
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane.
13
LO-
Balanced LO Input Pin. This pin is internally DC-biased and should be
DC-blocked if connected to a device with a DC level present. For single-
ended input operation, one pin is used as an input and the other LO
input is AC coupled to ground. The input impedance is 50
Ω in both the
balanced and single-ended modes.
14
LO+
Same as pin 13, except complementary input.
15
VCC
Supply voltage for all bias circuits and logic circuits.
16
GAIN
SELECT
When GAIN SELECT is high: the driver amplifier is switched to high
gain mode; both amplifier stages are active; the gain is maximized;
and, the entire device draws approximately 51mA. When GAIN
SELECT is low, the second stage of the PA driver is turned off and
bypassed. This results in a device current of 26mA, which is approxi-
mately a 50% current reduction. The upconverting mixer remains on in
both the high and low gain modes to prevent VCO pulling.
Pkg
Base
GND
Ground connection. The backside of the package should be soldered to
a top side ground pad which is connected to the ground plane with mul-
tiple vias.
PD
Gain
Select
Mixer
Amplifier
First Stage
Amplifier
Second Stage
Gain
(dB)*
0
0
ON
OFF
OFF
0
1
ON
OFF
OFF
1
0
ON
ACTIVE
BYPASSED
11.9
1
1
ON
ACTIVE
ACTIVE
34.5
BIAS
IF-
IF+
BIAS
LO-
LO+
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