SP000012956 データシートの表示（PDF） - Infineon Technologies

部品番号

コンポーネント説明

メーカー

SP000012956

ASK/FSK 868MHz Wireless Transceiver

Infineon Technologies 

1

Product Description

TDA5250 D2

Version 1.7

Product Description

1.1

Overview

The IC is a low power consumption single chip FSK/ASK Transceiver for the frequency band 868-

870 MHz. The IC combines a very high level of integration and minimum external part count. The

device contains a low noise amplifier (LNA), a double balanced mixer, a fully integrated VCO, a PLL

synthesizer, a crystal oscillator with FSK modulator, a limiter with RSSI generator, an FSK

demodulator, a data filter, a data comparator (slicer), a positive and a negative data peak detector,

a highly efficient power amplifier and a complex digital timing and control unit with I2C/3-wire

microcontroller interface. Additionally there is a power down feature to save battery power.

The transmit section uses direct ASK modulation by switching the power amplifier, and crystal

oscillator detuning for FSK modulation. The necessary detuning load capacitors are external. The

capacitors for fine tuning are integrated. The receive section is using a novel single-conversion/

direct-conversion scheme that is combining the advantages of both receive topologies. The IF is

contained on the chip, no RF channel filters are necessary as the channel filter is also on the chip.

The self-polling logic can be used to let the device operate autonomously as a master for a decoding

microcontroller.

1.2

Features

■ Low supply current (Is = 9 mA typ. receive, Is = 12mA typ. transmit mode, both at 3 V supply

voltage, 25°C)

■ Supply voltage range 2.1 V to 5.5 V

■ Operating temperature range -40°C to +85°C

■ Power down mode with very low supply current consumption

■ FSK and ASK modulation and demodulation capability without external circuitry changes, FM

demodulation capability

■ Fully integrated VCO and PLL synthesizer and loop filter on-chip with on-chip crystal oscillator

tuning, therefore no additional external components necessary

■ Differential receive signal path completely on-chip, therefore no external filters are necessary

■ On-chip low pass channel select and data filter with tuneable bandwith

■ Data slicer with self-adjusting threshold and 2 peak detectors

■ Self-polling logic with adjustable duty cycle and ultrafast data rate detection and timer mode

providing periodical interrupt

■ FSK and ASK sensitivity < -109 dBm

■ Adjustable LNA gain

■ Digital RSSI and Battery Voltage Readout

■ Provides Clock Out Pin for external microcontroller

■ Transmit power up to +13 dBm in 50Ω load at 5V supply voltage

■ Maximum datarate up to 64 kBaud Manchester encoded

■ I2C/3-wire microcontroller interface, working at max. 400kbit/s

■ meets the ETSI EN300 220 regulation and CEPT ERC 7003 recommendation

Data Sheet

9

2007-02-26

Share Link: