TDK5100F_08 INFINEON [Infineon Technologies AG], TDK5100F_08 Datasheet - Page 15
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TDK5100F_08
Manufacturer Part Number
TDK5100F_08
Description
434 MHz ASK/FSK Transmitter in 10-pin Package
Manufacturer
INFINEON [Infineon Technologies AG]
Datasheet
1.TDK5100F_08.pdf
(39 pages)
- Current page: 15 of 39
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2.4.4.3
In the TRANSMIT MODE the PLL is switched on and the power amplifier is turned on too.
The current consumption of the IC is typically 7 mA when using a proper transforming
network at PAOUT, see Figure 8.
2.4.4.4
The bias circuitry is powered up via a voltage V > 1.5 V at the pin PDWN (pin10).
When the bias circuitry is powered up, the pins ASKDTA and FSKDTA are pulled up
internally.
Forcing the voltage at the pins low overrides the internally set state.
Alternatively, if the voltage at ASKDTA or FSKDTA is forced high externally, the PDWN
pin is pulled up internally via a current source. In this case, it is not necessary to connect
the PDWN pin, it is recommended to leave it open.
The principle schematic of the power mode control circuitry is shown in Figure 3
Figure 3
Data Sheet
ASKDTA
FSKDTA
PDWN
Transmit Mode
Power mode control
Power mode control circuitry
Source
Bias
On
120 kΩ
120 kΩ
PLL
MHz
434
15
PA
OR
On
FSK
IC
Functional Description
V 1.2, 2008-04-04
TDK5100F
FSKOUT
PAOUT
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