MultiMode 3x3 power amplifier modules increase talk times
May 11, 2010 // Jean-Pierre Joosting
Avago Technologies has announced ten new compact UMTS power amplifier modules that maximize handset talk time and extend battery life. UMTS Bands 1, 2, 4, 5 and 8 are supported.
The ACPM-500x PAMs (power amplifier modules) are designed to meet the requirements of multimode applications including UMTS (universal mobile telecommunication system), CDMA (code division multiple access) and LTE (long term evolution).
The ACPM-520x PAMs are optimized to maximize the PAE at maximum RF powers by adjusting maximum output powers. These modules are intended to meet UMTS specifications. With multiple product lines, customers have the flexibility to choose the right products for their application.
All of the PAMs benefit from Avago’s fifth generation CoolPAM™ technology that lowers quiescent current to 3.0 mA typically and adds a switchless active bypass mode for higher PAE at low output power levels. High efficiency at low power output has become an important design parameter for handset manufacturers since in urban and suburban areas with good cellular coverage handsets usually transmit at low power.
The PAMs feature PAE of 12 to 20 percent of maximum output power in bypass mode and 20 to 25 percent of maximum output power in mid-power mode, representing improvements over existing power amplifiers in the market. CoolPAM technology enables mobile handset designers to extend the usage time without an increase of battery capacity.
All ACPM‑500x and the ACPM-520x UMTS power amplifiers include a 20 dB directional coupler. The high directivity makes precise power control possible. For multi-band handsets, the internal directional coupling and isolation ports are available for daisy chaining. This simplifies system printed circuit board (PCB) layout.
The new power amplifiers are manufactured on advanced InGaP HBT (hetero-junction Bipolar Transistor) MMIC technology with proven state-of-the-art reliability, temperature stability and ruggedness.
The ACPM-500x power amplifiers series targets all OEMs and ODMS in the UMTS, CDMA and LTE handset and data card markets. The UMTS Forum reported recently that there are more than 500 million 3G/UMTS subscriptions worldwide, representing 10 percent of global mobile customers.
A summary of features include:
- Integrated directional coupler with 20 dB directivity;
- Coupling and isolation ports externally available;
- Daisy chain capability for dual band handsets;
- Three power control modes: bypass, mid-power and high power;
- High PAE with low output power for maximum talk time;
- 12 to 20 percent of maximum power in bypass mode;
- 20 to 25 percent of maximum power in mid-power mode;
- Very low quiescent current: 3.0 mA typical;
- Meets stringent UMTS, CMDA and LTE linearity requirements;
- Internally matched 50 Ω RF input and output ports;
- Compact design by reducing external components;
- Power-down mode: less than 5 µA current drain.
The PAMs are available in a compact 10-pin surface mount module with a 3 mm by 3 mm footprint. Thin package heights (0.9 mm typical for the ACPM-500x and 1 mm typical for the ACPM-520x) support slim handset designs. The devices are lead-free and RoHS compliant. All devices have a -20°C to +85°C case operating temperature range.
For further information: www.avagotech.com. All news
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Internet of Things (IoT) manufacturer Ciseco has launched the Raspberry Pi ‘Wireless Inventors Kit’ (RasWIK), featuring 88 pieces to provide everything a Pi owner needs to follow a series of step-by-step projects or to create their own wireless devices, without the need for configuration or even writing code.
RasWIK has been designed to be highly accessible, demystifying the dark art of wireless and enabling anyone with basic computing skills to begin building wireless devices with a Raspberry Pi. You can create anything from a simple traffic light, to a battery monitor, or even a temperature gauge that sends data to the Xively IoT cloud so billions can access the data.This month, Ciseco is giving away twelve Raspberry Pi Wireless Inventors kits, worth £49.99 each for EETimes Europe's readers to win.
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In our previous reader offer, Farsens was giving away five kits for EEtimes Europe readers to evaluate its FenixVortex, Kineo and X1 wireless, battery free sensor tags.
Lucky winners include Mr A. Neil from the UK, Mr. E. Delvaux from Belgium, Mr Lengal from the Czech Republic, Mr H. Bijlsma from the Netherlands, and Mr G. Pfaff from Germany. All should be receiving their packages soon. Lets wish them some interesting findings with their projects.
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