TDA7210 Infineon Technologies, TDA7210 Datasheet - Page 28

• Manufacturer Part Number: TDA7210
• Description: IC RECEIVER FSK/ASK 28-TSSOP
• Manufacturer: Infineon Technologies
• Type: ASK/FSK Single Conversion Receiverr

Specifications of TDA7210

• Package / Case: 28-TSSOP
• Frequency: 810MHz ~ 870MHz, 400MHz ~ 440MHz
• Sensitivity: -110dBm
• Data Rate - Maximum: 100 kbps
• Modulation Or Protocol: ASK, FSK
• Applications: Remote Control, RKE, Security Systems
• Current - Receiving: 5.9mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Current: 7.7 mA
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 28
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: SP000524274; TDA7210; TDA7210INTR

Wireless Components
4.5 Data Slicer Threshold Generation
The threshold of the data slicer, especially for a coding scheme without DC-con-
tent, can be generated using an external R-C integrator as shown in Figure 4-
5. The time constant T
the longest period of no signal change T
culation of the time constant T
ANV1.1“, chapter „4.11 Data Slicer“. In order to keep distortion low, the mini-
mum value for R1 is 20k Ω .
Figure 4-5
In case of ASK operation another possibility for threshold generation is to use
the peak detector in connection with two resistors and one capacitor as shown
in the following figure. The component values are depending on the coding
scheme and the protocol used.
Figure 4-6
Data Slicer Threshold Generation with External R-C Integrator
Data Slicer Threshold Generation Utilising the Peak Detector
data
filter
data
filter
A
Pins:
peak detector
4 - 7
of the R-C integrator has to be significantly larger than
Pins:
C15
19
26
A
R1
please see Application Note „TDA521x-
R3
R2
19
20
L
within the data sequence. For the cal-
U
20
threshold
data slicer
U
threshold
data slicer
C13
data out
25
Data Sheet, December 2008
data out
25
Applications
TDA7210
Data_slice1.wmf
Data_slice2.wmf