Siemens TDA6050-5 Datasheet

Video IF with FPLL,
MAC State

Features

● Active multistandard video IF

with FPLL demodulator

● 12-MHz bandwidth

● MAC state

TDA 6050-5

Bipolar IC

P-DIP-20

Type Ordering Code Package

TDA 6050-5 Q67000-A5123 P-DIP-20

Circuit Description

The IF circuit consists of a four-stage capacitively coupled and symmetrically designed controlled
amplifier and a real synchronous demodulator with a FPLL-carrier regeneration. Two IF inputs can
be selected for applications with different SAWs. The main performance of the device is the very low
differential phase DP and gain DG combined with an excellent intermodulation ratio. The positive
video output is used to derive the IF and tuner control voltage. The AGC threshold is set by means
of a potentiometer. Dependent on the modulation polarity the video signal and the AGC are
switched over. MAC state can be selected by an additional signal.

Application

Multistandard TV/VTR and cable converters with mono or stereo applications.

Semiconductor Group 63 06.94

Pin Functions
Pin No. Function

1 IF input 1a
2 IF input 1b
3 IF switch
4 Tuner AGC output
5 Tuner AGC threshold
6 Main AGC-time constant
7 Mean value AGC-time constant
8 Positive/negative modulation switch
9 N.C.
10 FPLL-VCO (2 × video carrier)

TDA 6050-5

11 FPLL-VCO (2 × video carrier)
12 N.C.
13 FPLL-loop filter
14 FPLL-loop reference
15 Video output
16 MAC-standard switch
17 +
18 Ground
19 IF input 2a
20 IF input 2b

V

supply voltage

S

Semiconductor Group 64

TDA 6050-5

Block Diagram

Semiconductor Group 65