TDA5251 Infineon Technologies, TDA5251 Datasheet - Page 63

• 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

Figure 3-24
For applications requiring fast attack and slow release from the threshold value it is reasonable to
use the peak detectors. The threshold value is generated by an internal voltage divider. The release
time is defined by the internal resistance values and the external capacitors.
Figure 3-25
Data Sheet
Signal
Slicer Level using Peak Detector
Peak Detector timing
Signal
τ
τ
τ
negPkD
negPkD
posPkD
= 100
= 100
63
k
k
Ω
Ω
⋅
C
⋅
τ
C
p
posPkD
n
Pos. Peak Detector (pin13)
Neg. Peak Detector (pin12)
Threshold SLC(pin14)
t
TDA5251 F1
Version 1.1
Application
2007-02-26
PkD_timing.wmf
[3 – 32]
[3 – 33]
SLC_PkD.wmf