TDA5251 Infineon Technologies, TDA5251 Datasheet - Page 60

• 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

The DC offset compensation needs 2.2ms after Power On or Tx/Rx switch. This time is hard wired
and independent from external capacitors C C on pins 31 to 38. The maximum value for this
capacitors is 47nF.
RSSI accuracy settling time = 2.2ms + 5*RC=2.2ms+5*37k*2.2nF=2.6ms
R - internal resistor; C - external capacitor at Pin 29
Table 3-11
Figure 3-21
Data Sheet
[nF]
220
100
Cc
47
22
10
Limiter Bandwidth
Limiter frequency characteristics
80
v [dB]
0
lower limit
lower limit
f
3dB
f3dB
1000
[Hz]
100
220
470
2200
IQ Filter
60
f
IQ Filter
3dB
upper
f3dB
limit
- ll -
- ll -
- ll -
- ll -
Limiter
f
3dB
setup time not guaranteed
setup time not guaranteed
Eval Board
Comment
f
TDA5251 F1
Version 1.1
Application
2007-02-26
limiter_char.wmf