TDA5251 Infineon Technologies, TDA5251 Datasheet - Page 71

• Manufacturer Part Number: TDA5251
• Description: TXRX FSK/ASK SGL LP TSSOP-38
• Manufacturer: Infineon Technologies
• Type: Transceiverr

Specifications of TDA5251

• Package / Case: 38-TSSOP
• Frequency: 315MHz
• Data Rate - Maximum: 64kbps
• Modulation Or Protocol: ASK, FSK
• Applications: RKE, Remote Control Systems
• Power - Output: 13dBm
• Sensitivity: -109dBm
• Voltage - Supply: 2.1 V ~ 5.5 V
• Current - Receiving: 9.3mA
• Current - Transmitting: 14mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Operating Frequency: 0.35 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: SP000014554; TDA5251; TDA5251INTR; TDA5251XT

based software WinQSIM via a GPIB interface. The AMIQ generator has a pseudo random binary
sequence (PRBS) generator and a bit error test set built in. The resulting I/Q signals are applied to
the SMIQ to generate a ASK (OOK) spectrum at the desired RF frequency.
Data is demodulated by the TDA5251 and then sent back to the AMIQ to be compared with the
originally sent data. The bit error rate is calculated by the bit error rate equipment inside the AMIQ.
Baseband coding in the form of Manchester is applied to the I signal as can be seen in the
subsequent figure.
Figure 3-34
In the following figures the RF power level shown is the average power level.
These investigations have been made on an Infineon evaluation board using a data rate of 4 kBit/
s with manchester encoding and a data filter bandwidth of 7 kHz. This is the standard configuration
of our evaluation boards. All these measurements have been performed with several evaluation
boards, so that production scattering and component tolerances are already included in these
results.
Regarding the data filter bandwidth it has to be mentioned that a data rate of 4 kBit/s using
manchester encoding results in a data frequency of 2 kHz to 4 kHz depending on the occurring
data pattern. The test pattern given by the AMIQ is a pseudo random binary sequency (PRBS9)
with a 9 bit shift register. This pattern varies the resulting data frequency up to 4 kHz.
Data Sheet
BER Test Setup
RS 232
GPIB /
Personal Computer
WinIQSIM
Software
Marker Output
Rohde & Schwarz
I/Q Modulation Source
AMIQ
Rohde & Schwarz
Vector Signal Generator
SMIQ 03
ASK / FSK RF Signal
Manchester
Encoder
I
Q
(Bit Error Rate
AMIQ BERT
Test Set)
71
Clock
Data
RFin
Transceiver Testboard
TDA525x
Manchester
Decoder
DATAout
DUT
TDA5251 F1
Version 1.1
Application
2007-02-26
TestSetup.wmf