TDA7110F Datasheet, PDF (8/36 Pages) Infineon Technologies AG – 434 MHz ASK/FSK Transmitter in 10-pin Package

TDA7110F
Functional Description
Table 3
Pin Definition and Function¹
Pin Symbol Interface Schematic
No.
1 CLKOUT
V_S
1
300 Ω
Function
Clock output to supply an external
device.
An external pull-up resistor has to
be added in accordance to the
driving requirements of the
external device.
The clock frequency is 847.5 kHz.
2 VS
3 GND
4 FSKOUT
V_S
V_S
200 µA
120 kΩ
200 kΩ
This pin is the positive supply of
the transmitter electronics.
An RF bypass capacitor should be
connected directly to this pin and
returned to GND (pin 3) as short
as possible.
General ground connection.
This pin is connected to a switch to
GND (pin 3).
The switch is closed when the
signal at FSKDTA (pin 7) is in a
logic low state.
4
The switch is open when the signal
at FSKDTA (pin 7) is in a logic high
state.
FSKOUT can switch an additional
capacitor to the reference crystal
network to pull the crystal
frequency by an amount resulting
in the desired FSK frequency shift
of the transmitter output
frequency.
Data Sheet
8
V 1.0, 2009-02-26