TDA7100 Datasheet, PDF (9/41 Pages) Infineon Technologies AG – 434 MHz ASK/FSK Transmitter in 10-pin Package

Pin Symbol
No.
5 COSC
Interface Schematic
V_S
V_S
6 kΩ
100 µA
TDA7100
Functional Description
Function
This pin is connected to the
reference oscillator circuit.
The reference oscillator is working
as a negative impedance
converter. It presents a negative
resistance in series to an
5 _{inductance at the COSC pin.}
6 ASKDTA
V_S
+1.2 V
Digital amplitude modulation can
be imparted to the Power Amplifier
through this pin.
60 kΩ
6
90 kΩ
A logic high (ASKDTA > 1.5 V or
+1.1 V open) enables the Power
Amplifier.
50 pF
30 µA
A logic low (ASKDTA < 0.5 V)
disables the Power Amplifier.
Data Sheet
9
V 1.0, 2007-05-02