LW203
300-900MHz ASK Transmitter

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Introduction

LW203 is a single chip AM transmitter system designed for ASK communication systems. It includes a Colpitts oscillator, an optional RF power amplifier. Targeted applications are in the frequency band from 300MHz to 900MHz. By using an appropriate SAW resonator, LW203 can support both 315/433MHz and 886/915MHz UHF bands for ASK communication at low cost without any tuning. It can also use LC or Microstrip Line as the resonator to form a super low-cost solution. It is a complementary chip to Lexiwave’s LW103 ASK receiver chip to form a complete RF solution for ASK communication.

Features

• Frequency range from 300 MHz to 900 MHz

• Optional RF power amplifier

• Low power consumption

• Operate from - 20 °C to 85 °C

• Only require a few inexpensive external components

• No tuning and no programming with SAW resonator

• Low cost

• FCC and ETSI compliant

• QFN-16L package or die form for PCB bonding

Applications

• 315/433MHz or 886/915MHz band systems

• Remote controllers

• Security systems like car alarm

• Wireless door bells

• Garage openers

• Radio controlled toys

• Monitoring systems

• Local oscillator source

• Remote fan/ light control

Datasheet

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