TDK5110 データシートの表示（PDF） - Infineon Technologies

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TDK5110

Wireless Components ASK/FSK Transmitter 868/433 MHz

Infineon Technologies 

TDK 5110

Functional Description

8 CLKOUT

8

300 Ω

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.

A clock frequency of 3.39 MHz is selected

by a logic low at CLKDIV input (pin 9).

A clock frequency of 847.5 kHz is selected

by a logic high at CLKDIV input (pin 9).

9

CLKDIV

This pin is used to select the desired clock

+1.2 V

VS

division rate for the CLKOUT signal.

A logic low (CLKDIV < 0.2 V) applied to this

pin selects the 3.39 MHz output signal at

5 µA

CLKOUT (pin 8).

60 kΩ

9

60 kΩ

A logic high (CLKDIV open) applied to this

pin selects the 847.5 kHz output signal at

+0.8 V CLKOUT (pin 8).

10 COSC

VS

6 kΩ

10

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.

100 µA

11 FSKOUT

12 FSKGND

VS

200 µA

1.5 kΩ

11

12

This pin is connected to a switch to

FSKGND (pin 12).

The switch is closed when the signal at

FSKDTA (pin 7) is in a logic low state.

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 trans-

mitter output frequency.

Ground connection for FSK modulation out-

put FSKOUT.

Wireless Components

3-5

Specification, October 2002

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