Table of Contents
Advertisement
3. TECHNICAL BRIEF
3.26. Power Amplifier Module
The RF3158 (U501) is a high-power, dual-mode amplifier (PA) with integrated power control. This PA
is designed to operate both in a saturated mode for GMSK signaling and in a linear mode for 8PSK
modulation. Featuring input and output terminals that are internally matched to 50 ohms, the PAM is
designed to be the final amplification stage in a dual-mode GSM/EDGE mobile transmit lineup
operating in the 824 MHz to 915 MHz (low) and 1710 MHz to 1910 MHz (high) bands.
Table 13 PAM pin description
PIN
Function
1
HB_RFIN
2
BAND_SEL
3
TX_EN
4
VBATT
5
VMODE
6
VRAMP
7
LB_RFIN
8,9,10,11
GND
12
LB_RFOUT
13,14,15,16,17
GND
18
HB_RFOUT
19,20,21,22,23
GND
Description
RF input to the High-band PA
Logic low=low band, Logic high=high band select
PA Enable
Main supply
Logic low=GMSK mode, Logic high=8PSK mode select
Ramped burst pin
RF input to the Low-band PA
Ground
RF output from the low-band PA
RF output from the high-band PA
- 70 -
Advertisement
Table of Contents
Troubleshooting
