TDA5250 Infineon Technologies, TDA5250 Datasheet - Page 9

• Manufacturer Part Number: TDA5250
• Description: TX/RX ASK/FSK 868-870MHZ 38TSSOP
• Manufacturer: Infineon Technologies
• Type: Transceiverr

Specifications of TDA5250

• Package / Case: 38-TSSOP
• 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
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Operating Frequency: 870 MHz
• Operating Supply Voltage: 2.5 V, 3.3 V, 5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 4.4mm
• Product Length (mm): 9.7mm
• Operating Supply Voltage (min): 2.1V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: SP000012956; TDA5250; TDA5250INTR; TDA5250XT; TDA5250XT

1
1.1
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 I
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
Data Sheet
Low supply current (I s = 9 mA typ. receive, I s = 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
I
meets the ETSI EN300 220 regulation and CEPT ERC 7003 recommendation
2
C/3-wire microcontroller interface, working at max. 400kbit/s
Product Description
Overview
Features
9
Product Description
TDA5250 D2
Version 1.7
2007-02-26
2
C/3-wire