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The RMPA1963 Power Amplifier Module (PAM) is Fairchild's latest innovation in 50 Ohm matched, surface mount modules targeting US-PCS CDMA/WCDMA/HSDPA and Wireless Local Loop (WLL) applications. Answering the call for ultra-low DC power consumption and extended battery life in portable electronics, the RMPA1963 uses novel proprietary circuitry to dramatically reduce amplifier current at low to medium RF output power levels (< +16 dBm), where the handset most often operates.
A simple two-state Vmode control is all that is needed to reduce operating current by more than 50% at 16 dBm output power, and quiescent current (Iccq) by as much as 70% compared to traditional power-saving methods. No additional circuitry, such as DC-to-DC converters, are required to achieve this remarkable improvement in amplifier efficiency. Further, the 4x4x1.5 mm LCC package is pin-compatible and a drop-in replacement for last generation 4x4 mm PAMs widely used today, minimizing the design time to apply this performanceenhancing technology. The multi-stage GaAs Microwave Monolithic Integrated Circuit (MMIC) is manufactured using Fairchild RF's InGaP Heterojunction Bipolar Transistor (HBT) process.
RMPA1963 Maximum Ratings
Symbol
Parameter
Value
Units
VCC1, VCC2
Supply Voltages
5.0
V
Vref
Reference Voltage
2.6 to 3.5
V
Vmode
Power Control Voltage
3.5
V
Pin
RF Input Power
+10
dBm
Tstg
Storage Temperature
-55 to +150
Note: 1. No permanent damage with one parameter set at extreme limit. Other parameters set to typical values.
RMPA1963 Features
` 38% CDMA/WCDMA efficiency at +28 dBm Pout ` 14% CDMA/WCDMA efficiency (85 mA total current) at +16 dBm Pout ` Meets HSDPA performance requirements ` Linear operation in low-power mode up to +19 dBm ` Low quiescent current (Iccq): 25 mA in low-power mode ` Single positive-supply operation with low power and shutdown modes • 3.4V typical Vcc operation • Low Vref (2.85V) compatible with advanced handset chipsets ` Compact Lead-free compliant LCC package (4.0 X 4.0 x 1.5 mm nominal) ` Industry standard pinout ` Internally matched to 50 Ohms and DC blocked RF input/output ` Meets IS-95/CDMA2000-1XRTT/WCDMA performance requirements
The RMPA1965 power amplifier module (PAM) is designed for CDMA, CDMA2000-1X, WCDMA and HSDPA personal communications system (PCS) applications. The 2 stage PAM is internally matched to 50 to minimize the use of external components and features a low-power mode to reduce standby current and DC power consumption during peak phone usage.
High power-added efficiency and excellent linearity are achieved using our InGaP Heterojunction Bipolar Transistor (HBT) process.
RMPA1965 Maximum Ratings
Symbol
Parameter
Value
Units
VCC1, VCC2
Supply Voltages
5.0
V
Vref
Reference Voltage
2.6 to 3.5
V
Vmode
Power Control Voltage
3.5
V
Pin
RF Input Power
+10
dBm
TSTG
Storage Temperature
-55 to +150
Note: 1: No permanent damage with only one parameter set at extreme limit. Other parameters set to typical values.
RMPA1965 Features
` Single positive-supply operation with low power and shutdown modes ` 40% CDMA/WCDMA efficiency at +28 dBm average output power ` Compact lead-free compliant low-profile package (3.0 x 3.0 x 1.0 mm nominal) ` Internally matched to 50 and DC blocked RF input/output ` Meets CDMA2000-1XRTT/WCDMA performance requirements ` Meets HSDPA performance requirement