TDA5250

Packaging : Reel
Operating Supply Voltage : 2.5 V, 3.3 V, 5 V
Type : Transceiver
Package / Case : TSSOP-38
Operating Frequency : 870 MHz


Features:

`Low supply current (I<sub>s</sub> = 9 mA typ. receive, I<sub>s</sub> = 12mA typ. transmit mode, both at 3 V supply voltage, 25)
`Supply voltage range 2.1 V to 5.5 V
`Operating temperature range -40 to +85
`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 onchip
`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 50=load at 5V supply voltage
`Maximum datarate up to 64 kBaud
`I²C/3-wire microcontroller interface, working at max. 400kbit/s
`meets the ETSI EN300 220 regulation and CEPT ERC 7003 recommendation


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 TDA5250 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 TDA5250 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 of TDA5250 to save battery power.

The transmit section of TDA5250 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 of TDA5250 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 TDA5250 operate autonomously as a master for a decoding microcontroller.


Parameters:

Technical/Catalog Information	TDA5250
Vendor	Infineon Technologies
Category	RF and RFID
Frequency	868MHz
Data Rate - Maximum	64kbps
Modulation or Protocol	ASK, FSK
Applications	RKE, Remote Control Systems
Power - Output	9dBm
Sensitivity	-109dBm
Voltage - Supply	2.1 V ~ 5.5 V
Current - Receiving	9mA
Current - Transmitting	12mA
Package / Case	38-TSSOP
Operating Temperature	-40°C ~ 85°C
Data Interface	PCB, Surface Mount
Antenna Connector	PCB, Surface Mount
Packaging	Tape & Reel (TR)
Memory Size	-
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	TDA5250 TDA5250 TDA5250INTR ND TDA5250INTRND TDA5250INTR