CXA1884N Ver la hoja de datos (PDF) - Sony Semiconductor

Número de pieza

componentes Descripción

Fabricante

CXA1884N

Low-voltage FM IF Amplifier

Sony Semiconductor 

CXA1884N

1) Supply

This IC incorporates a regulation and is designed to operate steadily on a wide range of supply voltage from

1.0 to 4.0V.

Decoupling on the wiring to the supply pin (Pin 4) should be done as close to the pin as possible.

2) Oscillation input

Oscillation input method

(a) Using Pins 1 and 2, input self-excited oscillation signals through the composition of a Colpitts type crystal

oscillating circuit.

(b) Input local oscillation signals to Pin 1 directly.

1

2

VCC

(a)

3

Ceramic filter

Fig. 1

1

2

From LOCAL SIG

(b)

3

Ceramic filter

3) Mixer

This IC's mixer is of the double balance type. Pin 24 is the input pin. Input through a suitable alignment circuit.

Input impedance is at 1.6kΩ. The mixer output features a built-in 1.6kΩ Ioad resistance at Pin 3.

4) IF filter

The filter to be connected between this IC's mixer and the IF limiter should have the following specifications.

I/O impedance: 1.6kΩ ± 10%

Band width: Use according to application

– 10 –

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