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RF2642
Rev A8 DS060925
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
*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 approximately 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 multiple
vias.
PD
Gain
Select
Mixer
Amplifier
First Stage
Amplifier
Second Stage
Gain
(dB)*
00
ON
OFF
OFF
01
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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