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SP000012956

ASK/FSK 868MHz Wireless Transceiver

Infineon Technologies 

ASK/FSK 868MHz Wireless Transceiver

TDA5250 D2

Version 1.7

Product Info

General Description

The IC is a low power consumption single chip FSK/ASK

Transceiver for half duplex low datarate communication in the

868-870MHz band. The IC offers a very high level of integration

and needs only a few external components. It contains a highly

efficient power amplifier, a low noise amplifier (LNA) with AGC,

a double balanced mixer, a complex direct conversion stage, I/

Q limiters with RSSI generation, an FSK demodulator, a fully

integrated VCO and PLL synthesizer, a tuneable crystal

oscillator, an onboard data filter, a data comparator (slicer),

positive and negative peak detectors, a data rate detection

circuit and a 2/3-wire bus interface. Additionally there is a power

down feature to save battery power.

Features

■ Low supply current (Is = 9mA typ. receive,

Is = 12mA typ. transmit mode)

■ Supply voltage range 2.1 - 5.5V

■ Power down mode with very low supply cur-

rent consumption

■ FSK and ASK modulation and demodula-

tion capability

■ Fully integrated VCO and PLL

synthesizer and loop filter on-chip with on

chip crystal oscillator tuning

■ I2C/3-wire µController Interface

■ On-chip low pass channel select filter and

data filter with tuneable bandwidth

■ Data slicer with self-adjusting threshold and

2 peak detectors

■ FSK sensitivity <-109dBm, ASK sensitivity

< –109dBm

■ Transmit power up to +13dBm

■ Datarates up to 64kBit/s Manchester

encoded

■ Self-polling logic with ultra fast data rate

detection

Application

■ Low Bitrate Communication

Systems

■ Keyless Entry Systems

■ Remote Control Systems

■ Alarm Systems

■ Telemetry Systems

■ Electronic Metering

■ Home Automation Systems

Type

TDA5250 D2

Ordering Code

SP000012956

Package

<Dev_Package1>

Data Sheet

5

2007-02-26

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