TDK5110FHTMA1 Infineon, TDK5110FHTMA1 Datasheet - Page 17

• Manufacturer Part Number: TDK5110FHTMA1
• Description: Transmitter Ask/Fsk Sgl Tssop10
• Manufacturer: Infineon

Wireless Components
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 nec-
essary 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 3-5.
Figure 3-5
Table 3-8 provides a listing of how to get into the different power modes
Table 3-8
ASKDTA
FSKDTA
1) Low:
2) Open:
3) High:
Open
PDWN
High
PDWN
Low
Open
Open
Open
High
1)
3)
2)
Power mode control circuitry
Voltage at pin < 0.7 V (PDWN)
Voltage at pin < 0.5 V (FSKDTA, ASKDTA)
Pin open
Voltage at pin > 1.5 V
Low, Open, High
Low, Open, High
Low, Open, High
Low, Open
FSKDTA
3 - 11
Source
High
High
Bias
Low
On
120 k
120 k
PLL
MHz
868
Open, High
Open, High
Low, Open
ASKDTA
High
Low
Low
Low
PA
OR
On
FSK
IC
Specification, October 2002
Functional Description
POWER DOWN
PLL ENABLE
TRANSMIT
MODE
TDK 5110
FSKOUT
PAOUT
Power_Mode.wmf