TDA7110 Datasheet, PDF (17/39 Pages) Infineon Technologies AG – ASK/FSK Transmitter 868/433 MHz

TDA7110
Functional Description
The principle schematic of the power mode control circuitry is shown in
Figure 2-5.
PDWN
ASKDTA
FSKDTA
OR
On
Bias
Source
120 kΩ
120 kΩ
PLL
868
MHz
On
PA
FSK
IC
Figure 2-5 Power mode control circuitry
FSKOUT
PAOUT
Power_Mode.wmf
Table 3-8 provides a listing of how to get into the different power modes
Table 2-8
PDWN
Low¹⁾
Open²⁾
High³⁾
Open
High
Open
Open
1) Low:
2) Open:
3) High:
FSKDTA
Low, Open
Low
ASKDTA
Low, Open
Low
MODE
POWER DOWN
Low, Open, High
Low
High
Low
PLL ENABLE
Low, Open, High Open, High
High
Open, High
TRANSMIT
Low, Open, High
High
Voltage at pin < 0.7 V (PDWN)
Voltage at pin < 0.5 V (FSKDTA, ASKDTA)
Pin open
Voltage at pin > 1.5 V
Other combinations of the control pins PDWN, FSKDTA and ASKDTA are not
recommended.
Wireless Components
2 - 11
Data Sheet, December 2008