Preliminary
RF2459
Pin
1
Function Description
Interface Schematic
Mixer LO single-ended input. The pin is internally DC blocked. External
matching sets impedance.
LO IN
LO IN
Ground for downconverter. Keep traces physically short and connect
directly to ground plane for best performance.
2
3
GND2
VCC
Supply voltage for downconverter. External RF bypassing is required.
The trace length between the bypass caps and the pin should be mini-
mized. Connect ground sides of caps directly to ground.
Same as pin 2.
4
5
GND1
RF IN
Mixer RF single-ended input. The pin is internally DC blocked. External
matching sets input impedance.
RF IN
Same as pin 2.
6
7
GND3
IF-
IF output pin. The output is balanced. A current combiner external net-
work performs a differential to single-ended conversion and sets the
IF+ IF-
output impedance. There must be a DC path from V to this pin. this
CC
is normally achieved with the current combiner network. A DC blocking
cap must be present if the IF filter input has a DC path to ground.
Same as pin 7, except complementary output.
8
IF+
8
Rev A2 010717
8-99
RFMD [ RF MICRO DEVICES ]
