tda5251f1 Infineon Technologies Corporation, tda5251f1 Datasheet - Page 5

• Manufacturer Part Number: tda5251f1
• Description: Ask/fsk 315mhz Wireless Transceiver
• Manufacturer: Infineon Technologies Corporation

Confidential
ASK/FSK 315MHz Wireless Transceiver
TDA5251 F1
Product Info
General Description
The IC is a low power consumption single chip FSK/ASK
Transceiver for half duplex low datarate communication in the
315MHz 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 (I
– Supply voltage range 2.1 - 5.5V
– Power down mode with very low supply
– FSK and ASK modulation and demodulation
– Fully integrated VCO and PLL
Application
– Low Bitrate Communication
– Keyless Entry Systems
– Remote Control Systems
– Alarm Systems
– Telemetry Systems
Preliminary Specification
Type
TDA5251 F1
= 13mA typ. transmit mode)
current consumption
capability
synthesizer and loop filter on-chip with on
chip crystal oscillator tuning
Systems
s
= 9mA typ. receive, I
Ordering Code
s
5
– I
– On-chip low pass channel select filter and
– Data slicer with self-adjusting threshold and
– FSK sensitivity <-109dBm, ASK sensitivity <
– Transmit power up to +13dBm
– Self-polling logic with ultra fast data rate
– Electronic Metering
– Home Automation Systems
data filter with tuneable bandwidth
2 peak detectors
–109dBm
detection
2
C/3-wire µController Interface
Package
P-TSSOP-38-1
Version 1.0
2003-02-18