TDA5251F1

Features:

`Low supply current (Is = 9mA typ. receive, Is= 13mA typ. transmit mode)
`Supply voltage range 2.1 - 5.5V
`Power down mode with very low supply current consumption
`FSK and ASK modulation and demodulation 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
`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



Pinout




Specifications

Parameter	Symbol	Limit Values		Unit	Remarks
		Min	Max
Supply Voltage	Vs	-0.3	5.8	V
Junction Temperature	TJ	-40	+125
Storage Temperature	Ts	-40	+150
Thermal Resistance	RthJA		114	K/W
ESD integrity, all pins	VESD	tbd	tbd	kV	HBM according to MIL STD 883D, method 3015.7

Description

The TDA5251F1 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. TDA5251F1 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 of TDA5251F1 to save battery power.