TEMIC TDA4453 Datasheet

TDA4453

Video IF Amplifier for Multistandard TV Receiver and VTR
Appliances

Technology: Bipolar
Features

D

Interference suppression

D

Standard B/G-L suitable, processes negatively and
positively modulated IF-signals with equal polarity of
the output signal

D

Ultra white inverter and ultra black limiter for
reducing transmission interference

D

Internally noise protected gain control, no flyback
pulses required

D

Expanded video frequency response allows the
demodulation of amplitude modulated MAC signals

D

High input sensitivity

D

Minimal intermodulation interference

D

Fast AGC by controlled discharge of the
AGC capacitor
Standard L mode: AGC acting on peak white level,
capacitor discharge control by averaged video signal

Standard B/G: AGC acting on the sync. pulse peak

D

Small differential error

D

Constant input impedance

D

Video output voltage with narrow tolerance

D

Adapted output for insertion of ceramic transducers as
intrinsic sound trap

D

Connecting and basic circuitry compatible to the
TEMIC video IF type programme - permits building
block system for video IF module

TELEFUNKEN Semiconductors

Rev . A1, 15-Aug-96

Figure 1. Block diagram

1 (7)

TDA4453

Pin Description

Pin Function

1,16 IF-input

2 Standard switch: open B/G

ground L

3,15 Ground

4 IF-AGC storage capacitor
5 AGC (tuner control)
6 Tuner AGC take over

Circuit Description

The following function units are integrated in this circuit
combination for video-IF processing:

D

Three symmetric, highly stable, gain controlled wide­band amplifier, quasi galvanic coupling eliminates
feed back

D

Video carrier controlled demodulator of high linearity

D

Polarity switch over for video

Pin Function

7 Not connected

8,9 Demodulator circuit

10 Average capacitor standard L
11 Video output
12 Not connected
13 Supply voltage
14 Not connected

D

Video output amplifier with low-pass characteristics,
limiter for ultra black and inverter for ultra white
interference

D

High impedance, interference free controlled voltage
facilities, best possible AGC time constant with small
storage capacitor

D

Controlled discharge circuit for fast gain control

D

With VTR - operation the video output level is
according to the ultra white level in B/G, ultra black
level in L

Absolute Maximum Ratings

Reference point Pin 3, unless otherwise specified

Parameters Symbol Value Unit
Supply voltage Pin 13 V
Supply current Pin 13 I
Open loop voltage Pin 5 V
External voltage Pin 4

Pin 11
Breaking current for VTR operation Pin 4 I
Video output current

Max. load Pin 11
Short circuit max 1 s Pin 11

Power dissipation T
Junction temperature T
Ambient temperature range T
Storage temperature range T

≤ 60°C P

amb

Thermal Resistance

Parameters Symbol Maximum Unit

Junction ambient R

V

V

I

amb

thJA

O

tot

stg

S

S

5
4

11
4

j

10 to 13.5 V

65 mA

V

S

10

8

0.3 mA

5

30

1.0 W

125 °C

–25 to +70 °C

–25 to +125 °C

60 K/W

V
V

mA

2 (7)

TELEFUNKEN Semiconductors

Rev . A1, 15-Aug-96

TDA4453

Electrical Characteristics

Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit
Supply current Pin 13 I
Ultra white level at

1)

Pin 11 V

S

o

4.8 5.2 5.6 V

standard B/G
Ultra black clamping level

Pin 11 V

o

1.75 1.9 2.05 V

at standard B?G

Composite video output

2)

Pin 11 v

o(pp)

2.7 3.0 3.3 V

signal B/G
Video signal standard L 3)(black/white) Pin 11 v
Difference of the video

Pin 11 10 %

o(pp)

1.85 2.1 2.35 V

signals standard L-B/G
Clamping level of black

Pin 11 V

11

limiter
Threshold of the ultra

white



Grey level of the ultra

Pin 11 V

Pin 11 V

11

11

      

white inverter
Supply voltage influence

Pin 11 ∆V

black

on the ultra black level in
standard B/G

Supply voltage influence

Pin 11 ∆V

white

on the ultra white level in
standard B/G

Video bandwidth (–3 dB) Pin 11 B
Video frequency response

Pin 11 ∆V

Video

Video

over the AGC control
range

Output DC current V11= 8 V Pin 11 I
Response time of the

4)

Pin 4 t

11

r

peak white control in
standard L

Voltage level standard

5)

Pin 2 V

2

2 V

B/G
Voltage level standard L
Input sensitivity

6)

(symmetrical)

5)

v

=3.0 V Pin

14(pp)

Pin 2 V

2

v

i

0 1.2 V

1–16
V

= 0.8 V

4

IF-AGC gain reduction ∆P 60 dB
Available tuner AGC 10 dB via AGC use

I

5

3 4 mA

Pin 5

Automatic tuner AGC with
IF-control

Pin 6 not connected

Pin 5

AGC 61 dB

65 mA

250 mV below sync. (typ.)

3.6 V

0.5 %/V

1.0 %/V

10 MHz

2.0 dB

2.8 mA
10

S

100

m

s

V

m

V

1)

All measurements Pin 11 without load

2)

Residual carrier 10%

3)

Blanking level 30% carrier amplitude

4)

A peak white value for at least 10 ms must be transmitted for each complete frame

5

) Direct control of standard reversing switch with TTL level

6)

Sync. peak value standard B/G

TELEFUNKEN Semiconductors

Rev . A1, 15-Aug-96

3 (7)