TDA5101 Infineon Technologies, TDA5101 Datasheet - Page 27

• Manufacturer Part Number: TDA5101
• Description: TRANSMITTER ASK/FSK P-TSSOP-16
• Manufacturer: Infineon Technologies

Specifications of TDA5101

• Frequency: 315MHz
• Applications: Alarm Systems, Communication Systems
• Modulation Or Protocol: ASK, FSK
• Data Rate - Maximum: 20 kbps
• Power - Output: 5dBm
• Current - Transmitting: 7mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.1 V ~ 4 V
• Operating Temperature: -25°C ~ 85°C
• Package / Case: 16-TSSOP
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Product Depth (mm): 4.4mm
• Operating Supply Voltage (min): 2.1V
• Operating Supply Voltage (typ): 2.5/3.3V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: TDA5101INTR

Wireless Components
If the FSK switch is closed, Cv- is equal to Cv1 (C6 in the application diagram).
If the FSK switch is open, Cv2 (C7 in the application diagram) can be calculated.
Csw:
Remark:
2. Design hints on the buffered clock output (CLKOUT)
The CLKOUT pin is an open collector output. An external pull up resistor (RL)
should be connected between this pin and the positive supply voltage. The
value of RL is depending on the clock frequency and the load capacitance CLD
(PCB board plus input capacitance of the microcontroller). RL can be calculated
to:
Remark: To achieve a low current consumption and a low
Table 4-2
CLD
5
10
20
[
pF
]
parallel capacitance of the FSK switch (3 pF)
spurious radiation, the largest possible RL should be chosen.
These calculations are only approximations. The necessary values
depend on the layout also and must be adapted for the specific
application board.
fCLKOUT=
Cv
615 kHz
2
=
C
4 - 7
RL
RL
7
=
[
=
kOhm
39
18
10
Csw
fCLKOUT
∗
]
Cv
1
(
−
Cv
1
(
*
Cv
+
8
CLD
)
*
+
−
CLD
)
10
20
Cv
∗
5
[
(
pF
Cv
1
]
Specification, October 2001
1
fCLKOUT=
2.46 MHz
+
Csw
)
RL
Applications
TDA 5101
[
kOhm
4.7
2.2
10
]