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+2.8V, Single-Supply, Cellular-Band Linear Power Amplifier

Ultra-Low-Cost Cellular Band Power Amplifier Optimized for TDMA applications measures only 2mm x 2mm

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

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Key Features

  • Ultra-Compact 4 x 4 (2.06mm x 2.06mm) CSP
  • High Efficiency—41% at +30dBm POUT (TDMA) (typ)
  • On-Chip Power Detector
  • ICC < 1µA in Shutdown Mode
  • +2.8V to +4.5V True Single-Supply Operation
  • ±0.9dB Gain Variation from TA = -40°C to +85°C
  • Current Adjustable with PDM or DAC signal
  • No External Logic Interface Circuitry Required

Applications/Uses

  • 2-Way Pagers
  • Cellular-Band TDMA/AMPS Dual Mode™ Phones
  • Cordless Phones
  • PA Modules

Description

The MAX2251 low-voltage linear power amplifier (PA) is designed for TDMA/AMPS dual-mode phone applications. The device is packaged in an ultra-compact (2.06mm x 2.06mm) chip-scale package (CSP), and delivers over +30dBm of linear power in TDMA operation. An on-chip shutdown feature reduces operating current to 1µA (typ), eliminating the need for an external supply switch.

The MAX2251 does not need an external reference voltage, and requires only a few external matching components and no bias circuitry. Another feature of this device is the use of external bias resistors, eliminating wasted "safety-margin" current. This feature also allows current throttleback at lower output power levels, thereby maintaining the highest possible efficiency at all power levels.

Simplified Block Diagram

MAX2251: Typical Operating Circuit MAX2251: Typical Operating Circuit Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .