TDA5100A Просмотр технического описания (PDF) - Infineon Technologies

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TDA5100A

Wireless Components ASK Transmitter 434 MHz

Infineon Technologies 

TDA 5100A

preliminary

Functional Description

5

DATA

+1.2 V

Digital amplitude modulation can be

imparted to the Power Amplifier through this

pin.

60 kΩ

5

90 kΩ

50 pF

+1.1 V

3 0
A

A logic high (DATA > 1.5 V or open) enables

the Power Amplifier.

A logic low (DATA < 0.5 V)

disables the Power Amplifier.

6 CLKOUT

6

300 Ω

7

COSC

VS

6 k

7

100 A

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 output frequency is 3.39 MHz

when a crystal of 13.56 MHz is used.

This pin is connected to the reference oscil-

lator circuit.

The reference oscillator is working as a neg-

ative impedance converter. It presents a

negative resistance in series to an induc-

tance at the COSC pin.

The resonance frequency of the crystal

should be 13.56 MHz to achieve an output

frequency of 434 MHz.

Wireless Components

3-4

Specification, March 2001

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