Preliminary
RF2416
Pin
1
Function Description
Interface Schematic
DCS1800/PCS1900 RF input pin.
HB IN
To Bias
Circuit
HB IN
VCC1 HB
HB GND1
HB BIAS is set to the supply voltage at high gain mode. For bypass
mode see “Gain Select Possibility”.
2
3
HB BIAS
HB VREF/P
4
LB BIAS is set to the supply voltage at high gain mode. For bypass
mode see “Gain Select Possibility”.
LB BIAS
LB VREF/PD
GSM900 RF input pin.
4
5
LB IN
To Bias
Circuit
LB OUT
LB IN
LB GND
LNA emittance inductance. Total inductance is comprised of
package+bondwire+L2 on PCB.
LB GND
GSM900 Amplifier Output pin. This pin is an open-collector output. It
6
7
LB OUT
must be biased to V through a choke or matching inductor. This pin
CC
is typically matched to 50Ω with a shunt bias/matching inductor and
series blocking/matching capacitor. Refer to application schematics.
This pin selects high gain and bypass for GSM900.
Select < 0.8V, high gain.
LB SELECT
LB SELECT
Select > 1.8V, low gain.
This pin selects high gain and bypass for DCS1800/PCS1900.
Select < 0.8V, high gain.
Select > 1.8V, low gain.
8
9
HB SELECT
HB OUT
HB SELECT
DCS1800 Amplifier Output pin. This pin is an open-collector output. It
HB OUT
must be biased to V through a choke or matching inductor. This pin
CC
is typically matched to 50Ω with a shunt bias/matching inductor and
series blocking/matching capacitor. Refer to application schematics.
HB GND2
4-202
Rev A2 010810
RFMD [ RF MICRO DEVICES ]
