TDA5235
Reference
Unless explicitly otherwise noted, the following test conditions apply to the given
specification values in Table 10 and items D7 and D8:
* Hardware: TDA5240 Platform Testboard V1.0
* Single-Ended Matching for 315.0 MHz / 433.92 MHz / 868.3 MHz / 915.0 MHz
* RF input matched to 50 Ω; Insertion loss of input matching network = 1dB
* Receive Frequency 315.0 MHz / 433.92 MHz / 868.3 MHz / 915.0 MHz; Lo-Side LO-Injection
* Reference Clock: XTAL=21.948717 MHz
* IF-Gain: Attenuation set to default value (IFATT = 7)
* Double Down Conversion
* 1 IF-Filter: Center=10.7MHz; BW=330kHz; Connected between IF_OUT and IFBUF_IN
* 2nd IF Filter BW: Depending on Data Rate and FSK Deviation
* Received Signal at zero Offset to IF Center Frequency
* RSSI trimmed
* FSK Pre-Demodulation Filter (PDF) BW: Depending on Data Rate and FSK Deviation
* No SPI-traffic during telegram reception, CLK_OUT disabled
* AFC and AGC are OFF, unless otherwise noted
* Specification values are in respect to Manchester-coded Infineon-Reference Pattern 1
(7 Bits '0', 1 Bit ’1', 1 Bits '0', 1 Bit ’1', 1 Bits '0', 1 Bit ’1', PRBS5 (31 Bit), 1 Bit 'M') according to Figure 18
However a Code Violation is not used as EOM criterion
BER sensitivity measurements use Receive Mode TMMF (sampled with ideal data clock)
MER sensitivity measurements use Receive Mode POF
* DRE ... Data Date Error of received telegram vs. adjusted Data Rate
* DC ... Duty Cycle
* MER ... Message Error Rate
[MER = 1 - (number_of_correctly_received_messages / number_of_transmitted messages)]
* FAR ... False Alarm Rate
[FAR = number_of_mistakenly_wake_ups / number_of_periods_searching_for_data_on_channel]
* MMR ... Missed Message Rate
[MMR = number_of_mistakenly_missed_wake_up_patterns /
number_of_periods_with_wake_up_pattern_transmitted_and_searching_for_wake_up_pattern]
* BER ... Bit Error Rate (using a PRBS9 Pseudo-Random Binary Sequence)
[BER = 1 - (number_of_correctly_received_bits / number_of_transmitted bits)]
Data Sheet
146
V1.0, 2010-02-19
INFINEON [ Infineon ]
