TDK5101F 데이터 시트보기 (PDF) - Infineon Technologies

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TDK5101F

315 MHz ASK/FSK Transmitter in 10-pin Package

Infineon Technologies 

TDK5101F

Functional Description

2.4.4.3 Transmit Mode

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 Power mode control

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

PDWN

ASKDTA

FSKDTA

OR

On

Bias

Source

120 kΩ

120 kΩ

PLL

315

MHz

On

PA

FSK

IC

Figure 3 Power mode control circuitry

FSKOUT

PAOUT

Data Sheet

15

V 1.3, 2007-09-19

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