TEA6850 데이터 시트보기 (PDF) - Philips Electronics

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TEA6850

IF filter / amplifier / demodulator for FM radio receivers

Philips Electronics 

Philips Semiconductors

IF filter / amplifier / demodulator for FM

radio receivers

Preliminary specification

TEA6850

FUNCTIONAL DESCRIPTION

The first mixer stage at the input of the circuit is for mixing

the 10.7 MHz IF signal to 300 kHz. The IF filter has a

resonance frequency of 300 kHz (adjustable), tunable

from 50 kHz to 500 kHz, and a bandwidth of about 20 kHz

to 80 kHz tunable. Static filter response see Fig.5. The

limiter has a gain of approximately 90 dB, which is virtually

independent from temperature change. The demodulator

is frequency matched with the IF filter.

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL

VP

IP

Tstg

Tamb

Ptot

VESD

PARAMETER

supply voltage

supply current

storage temperature

operating ambient temperature

total power dissipation

electrostatic handling for all pins (note 1)

MIN.

−0.3

−

−55

−40

−

−

MAX.

+12

21

+125

+85

252

±300

UNIT

V

mA

°C

°C

mW

V

Note to the Limiting Values

1. Charge device model class B: equivalent to discharging a 200 pF capacitor through a 0 Ω series resistor.

THERMAL RESISTANCE

SYMBOL

Rth j-a

PARAMETER

from junction to ambient in free air

THERMAL RESISTANCE

65 K/W

July 1994

7

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