TDK5101F_07 INFINEON [Infineon Technologies AG], TDK5101F_07 Datasheet - Page 15

• Manufacturer Part Number: TDK5101F_07
• Description: 315 MHz ASK/FSK Transmitter in 10-pin Package
• Manufacturer: INFINEON [Infineon Technologies AG]

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
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
Data Sheet
ASKDTA
FSKDTA
PDWN
Transmit Mode
Power mode control
Power mode control circuitry
Figure
Source
Bias
On
8.
120 kΩ
120 kΩ
PLL
MHz
315
15
PA
OR
On
FSK
IC
Functional Description
V 1.3, 2007-09-19
Figure 3
TDK5101F
FSKOUT
PAOUT