NJM2549RB2 Ver la hoja de datos (PDF) - Japan Radio Corporation

Número de pieza

componentes Descripción

Fabricante

NJM2549RB2

WIDE BAND FM IF DEMODULATOR

Japan Radio Corporation  

TERMINAL FUNCTION

(Ta = 25°C , V+ = 3V , No signal )

Pin No.

SYMBOL

EQUIVARENT CIRCUIT

1

NJM2549

VOLTAGE

FUNCTION

1

V+

--

Supply Voltage

1

2

2

IF IN

3

IF DEC1 3

4

IF DEC2

4

5

5

10k

50k 400uA

1.95V

10k

50k

2pin: IF Amplifier Input

3,4pin: IF Decoupling

An external decoupling

capacitor is connected to

enhance stability.

The bandwidth of IF

Amplifier can be adjusted.

Large capacity: narrow IF

Small capacity: wide IF

6

RSSI

1

70

6

15k

5

Received Signal Strength

Indicator Output

--

Pin6 outputs DC level

proportional to the log of

pin2 input signal level.

1

70

7

IF OUT2

8

IF OUT1

70

300uA 300uA

5

FM IF Output

This is a balanced output,

and the capacitor for the

7

phase-shifter is connected

1.25V

between QUAD IN and

either of IF OUTs.

8

The joining terminal

changes the inclination.

7pin:N-Corve

8pin:S-Corve

Ver.2010-06-24

-8-

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