TDA5250 Infineon Technologies, TDA5250 Datasheet - Page 58

• Manufacturer Part Number: TDA5250
• Description: TX/RX ASK/FSK 868-870MHZ 38TSSOP
• Manufacturer: Infineon Technologies
• Type: Transceiverr

Specifications of TDA5250

• Package / Case: 38-TSSOP
• Frequency: 868MHz
• Data Rate - Maximum: 64kbps
• Modulation Or Protocol: ASK, FSK
• Applications: RKE, Remote Control Systems
• Power - Output: 9dBm
• Sensitivity: -109dBm
• Voltage - Supply: 2.1 V ~ 5.5 V
• Current - Receiving: 9mA
• Current - Transmitting: 12mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Operating Frequency: 870 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: SP000012956; TDA5250; TDA5250INTR; TDA5250XT; TDA5250XT

In the bipolar mode the FSK-switch can be controlled by a ramp function. This ramp function is set
by the bits D1 and D2 of the XTAL_CONFIG register (subadress 0EH). With these modes of the
FSK-switch the bandwidth of the FSK spectrum can be influenced.
When working in the FET mode the power consumption can be reduced by about 200 µ A.
The default mode is bipolar switch with no ramp function (D0 = 1, D1 = D2 = 0), which is suitable
for all bitrates.
Table 3-3
3.2.6
Case FSK-RX or ASK-TX (C tune2 ):
Table 3-4
Case FSK-TX or ASK-RX (C tune1 and C tune2 ):
Table 3-5
Data Sheet
D13
D12
D11
D0
D10
Bit
Bit
D5
D4
D3
D2
D1
D0
D9
D8
0
1
1
1
1
n.a.
D1
0
1
0
1
Finetuning and FSK modulation relevant registers
Nominal_Frequ_5
Nominal_Frequ_4
Nominal_Frequ_3
Nominal_Frequ_2
Nominal_Frequ_1
Nominal_Frequ_0
Sub Address 0EH: XTAL_CONFIG
Sub Address 02H: XTAL_TUNING
Sub Address 01H: FSK
n.a.
Function
Function
D2
0
0
1
1
FSK+3
FSK+0
FSK+5
FSK+4
FSK+2
FSK+1
bipolar (default)
Switch mode
bipolar
bipolar
bipolar
FET
Value
Value
500fF
250fF
500fF
250fF
8pF
4pF
2pF
1pF
8pF
4pF
2pF
1pF
58
Ramp time
< 0.2 µ s
< 0.2 µ s
12 µ s
4 µ s
8 µ s
Description
Description
shift: +FSK
or ASK-RX
Setting for
Setting for
frequency
frequency
(C tune2 )
(C tune2 )
ASK-TX
FSK-RX
nominal
positive
> 32 kBit/s NRZ
> 32 kBit/s NRZ
32 kBit/s NRZ
16 kBit/s NRZ
12 kBit/s NRZ
Max. Bitrate
TDA5250 D2
Version 1.7
Application
Default
Default
2007-02-26
0
1
0
0
1
0
0
0
1
0
1
0