Dual, SiGe, High-Linearity, 1700MHz to 2700MHz
Downconversion Mixer with LO Buffer/Switch
Pin Description
PIN
1
2
3, 5, 7, 12, 20, 22,
24, 25, 26, 34
NAME
RFMAIN
TAPMAIN
FUNCTION
Main Channel RF Input. Internally matched to 50Ω. Requires an input DC-blocking capacitor.
Main Channel Balun Center Tap. Connect a 0.033µF capacitor from this pin to the board ground.
GND Ground
4, 6, 10, 16, 21, 30,
36
8
9
11
VCC
TAPDIV
RFDIV
IFD_SET
Power Supply. Connect bypass capacitors as close as possible to the pin (see the Typical
Application Circuit).
Diversity Channel Balun Center Tap. Connect a 0.033µF capacitor from this pin to the ground.
Diversity Channel RF Input. Internally matched to 50Ω. Requires an input DC-blocking capacitor.
IF Diversity Amplifier Bias Control. Connect a 1.2kΩ resistor from this pin to ground to set the
bias current for the diversity IF amplifier.
13, 14
15
17
18, 28
19
23
27
IFD+, IFD-
Diversity Mixer Differential IF Output. Connect pullup inductors from each of these pins to VCC
(see the Typical Application Circuit).
IND_EXTD Connect a 10nH inductor from this pin to ground to increase the RF-IF and LO-IF isolation.
LO_ADJ_D
LO Diversity Amplifier Bias Control. Connect a 392Ω resistor from this pin to ground to set the
bias current for the diversity LO amplifier.
N.C. No Connection. Not internally connected.
LO1
Local Oscillator 1 Input. This input is internally matched to 50Ω. Requires an input DC-blocking
capacitor.
LOSEL Local Oscillator Select. Set this pin to high to select LO1. Set to low to select LO2.
LO2
Local Oscillator 2 Input. This input is internally matched to 50Ω. Requires an input DC-blocking
capacitor.
29
31
32, 33
35
LO_ADJ_M LO Main Amplifier Bias Control. Connect a 392Ω resistor from this pin to ground to set the bias
current for the main LO amplifier.
IND_EXTM Connect a 10nH inductor from this pin to ground to increase the RF-IF and LO-IF isolation.
IFM-, IFM+ Main Mixer Differential IF Output. Connect pullup inductors from each of these pins to VCC
(see the Typical Application Circuit).
IFM_SET IF Main Amplifier Bias Control. Connect a 1.2kΩ resistor from this pin to ground to set the bias
current for the main IF amplifier.
Exposed Pad. Internally connected to GND. Solder this exposed pad to a PCB pad that uses
—
EP
multiple ground vias to provide heat transfer out of the device into the PCB ground planes. These
multiple via grounds are also required to achieve the noted RF performance.
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