NJM2550 Просмотр технического описания (PDF) - Japan Radio Corporation

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производитель

NJM2550

10.7MHz INPUT FM IF DEMODULATOR

Japan Radio Corporation  

TERMINAL FUNCTION (Ta=25°C, V+=3 V)

Pin No. SYMBOL

EQUIVARENT CIRCUIT

V+

1

RSSI REF

1

50k

GND

2

GND

--

3

IF IN

V+

64k

165 165

3

4

4

DEC

GND

NJM2550

VOLTAGE

FUNCTION

1.12V

RSSI Reference Current

Control

To control RSSI reference current,

a resistor is connected to pin1 and

pin6, respectively.

The recommended value is 33kΩ.

By choosing the different thermal

coefficient of these two resisters,

RSSI thermal characteristics can

be changed.

--

Ground

IF Limiter Amplifier Input

The typical input impedance is

2.46 330Ω.

2.46V

IF Decoupling

An external decoupling capacitor

is connected to enhance stability.

Supply Voltage

5

5

V+

V+

--

GND

6

IF OUT

6

Ver.2006-02-24

V+

140uA

GND

IF Limiter Amplifier Output

An external phase-shifting coil or

discriminator is connected

between pin6 and pin7.

2.06V

-5-

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