February 1991

2

Philips Semiconductors

Product specification

Multistandard IF amplifier and

demodulator

TDA8349A

GENERAL DESCRIPTION

The TDA8349A is a multistandard IF amplifier and demodulator with AGC and AFC functions for television receivers.

The device has a video recognition circuit and a video switch for internal or external video for full SCART applications.

FEATURES

• Full-range gain-controlled wideband IF amplifier up to 60 MHz

• Wide-band video amplifier with good linearity and a class AB output stage to ensure a very low output impedance

• Supply independent video output level

• Small second harmonic IF output

• AGC circuit which operates on top sync level (negative modulation) or on white level (positive modulation) or on top

level (MAC) with reduced sensitivity for high sound carriers

• AFC circuit with an internal 90° phase shift circuit, a sample-and-hold circuit for negatively modulated signals to reduce

video dependent AFC information and an analog or digital output

• Video recognition possibility based on horizontal pulse duty cycles

• Video switch for selection of internal or external video signals

• Wide supply voltage range and ripple rejection

• Requires few external components

• Tuner AGC output for npn and pnp tuners

QUICK REFERENCE DATA

ORDERING AND PACKAGE INFORMATION

Note

1. SOT146-1; 1996 November 29.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

supply voltage (pin 14)

10.2

12

13.2

V

supply current (pin 14)

40

55

65

mA

IF input sensitivity (RMS value)

−

50

80

µV

IF gain control range

66

72

−

dB

video output voltage (peak-

to-peak value)

1.7

1.9

2.1

V

S/N

signal-to-noise ratio

54

61

−

dB

AFC output voltage swing

(peak-to-peak value)

10

−

11

V

EXTENDED

TYPE NUMBER

PACKAGE

PINS

PIN POSITION

MATERIAL

CODE

TDA8349A

20

DIL

plastic