ACPM-7821-TR1 AVAGO [AVAGO TECHNOLOGIES LIMITED], ACPM-7821-TR1 Datasheet - Page 8

• Manufacturer Part Number: ACPM-7821-TR1
• Description: 4 x 4 Power Amplifier Module for J-CDMA (898 - 925 MHz)
• Manufacturer: AVAGO [AVAGO TECHNOLOGIES LIMITED]

8
Peripheral Circuit in Handset
Figure 10. Peripheral Circuit.
MSM
Notes:
- Recommended voltage for Vref is 2.85V
- Place C1 near to Vref pin.
- Place C3 and C4 close to pin 5 (Vcc1) and pin 6 (Vcc2). These capacitors can affect the RF performance
- Use 50Ω transmission line between PAM and Duplexer and make it as short as possible to reduce conduction loss
- π-type circuit topology is good to use for matching circuit between PA and Duplexer.
- Pull-up resistor(R1) should be used to limit current drain. 6.2kΩ is recommended for ACPM-7821
RF In
PA_ON
PA_R0
Vdd
RF SAW
R1
C2
+2.85V
C1
C3
ACPM-7821
Vcont
GND
IN
Vcc1
Vref
C8
V
GND
Vcc2
BATT
GND
GND
OUT
C5
C4
Output Matching Circuit
C7
C6
L1
Duplexer
RF Out