RF2413
High impedance modulator LO input. A shunt 56Ω resistor can be used
for matching. This pin is NOT internally DC blocked. An external block-
ing capacitor must be provided if the pin is connected to a device with
DC present. A DC path to ground (i.e. an inductor or resistor to ground)
is, however, acceptable at this pin. If a blocking capacitor is required, a
value of 1nF is recommended.
10
11
LO1
LO1
Balanced IF output port. If no filtering is required this pin can be con-
nected directly to the MIX IN+ pin. This pin is NOT DC blocked and car-
ries DC. A blocking capacitor of 1nF is needed when this pin is
connected to a DC path. An appropriate matching network may be
needed if an IF filter is used.
MOD OUT+
MOD OUT+
MOD OUT-
Same as pin 11, except complementary output.
See pin 11.
12
13
MOD OUT-
GND1
Ground connection for all baseband circuits, modulator and the IF
buffer amplifier. Keep traces physically short and connect immediately
to ground plane for best performance.
High impedance balanced input to the gain controlled IF stage. This pin
has an internal DC blocking capacitor. If no IF filter is needed, this pin
may be connected directly to MOD OUT-. If an IF filter is used, an exter-
nal shunt resistor to ground may be needed to provide correct matching
for the filter.
14
MIX IN-
MIX IN+
MIX IN-
5
BIAS
BIAS
Same as pin 14, except complementary input.
See pin 14.
15
16
MIX IN+
GND2
Ground connection for the limiting LO2 buffer amplifier. Keep traces
physically short and connect immediately to ground plane for best per-
formance.
Mixer LO Input port. A shunt 56Ω resistor can be used for matching.
This pin has internal DC blocking,
17
LO2
LO2
BIAS
BIAS
Ground connection for the IF mixer and the RF gain control stage. Keep
traces physically short and connect immediately to ground plane for
best performance.
18
GND3
Ground connection for the RF output stage. Keep traces physically
short and connect immediately to ground plane for best performance.
19
20
GND4
50Ω output. This pin is not internally DC blocked, and an external
blocking capacitor of 100pF is required.
RF OUT
RF OUT
Rev B3 990419
5-23
RFMD [ RF MICRO DEVICES ]
