TDA4439 Datasheet, PDF (2/7 Pages) TEMIC Semiconductors – Video IF Amplifier for Multistandard TV and VTR

TDA4439
TELEFUNKEN Semiconductors
Pin Description
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
95 10840
Pin
1, 18
2
3, 17
4
5
6
7
8, 11
9, 10
12
13
14
15
16
Function
IF input
Standard switch: open B/G
ground L
Ground
IF-AGC storage capacitor
AGC (tuner control)
Tuner AGC take over
Polarity switch:
open AFC “DOWN”
ground AFC ^“UP^”
Demodulator circuit
AFC circuit
AFC output
Average capacitor standard L
Video output
Supply voltage
n.c.
Circuit Description
* ^{The following function units are integrated in this circuit combination for video-IF processing:}
– Three symmetric, highly stable, gain controlled wide- – Disconnectable AFC generator with push pull
band amplifier, quasi galvanic coupling eliminates
current output
feed back
– High impedance, interference free controlled voltage
– Video carrier controlled demodulator of high linearity facilities, best possible AGC time constant with small
– Polarity switch over for video and AFC-signal
storage capacitor
* – Video output amplifier with low-pass characteristics, – Controlled discharge circuit for fast gain control
limiter for ultra black and inverter for ultra white – With VTR operation the video output level is
interference
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
Supply voltage
Pin 15
Supply current
Pin 15
Open loop voltage
Pin 5
External voltage
Pin 4
Pin 14
Breaking current for VTR operation Pin 4
Video output current
max load
Pin 14
short circuit max 1 s
Pin 14
Power dissipation
Junction temperature
T_amb ≤ 60°C
Ambient temperature range
Storage temperature range
Symbol
Value
Unit
V_S
10 to 15
V
I_S
75
mA
V₅
V_S
V
V₄
10
V
V₁₄
8
V
I₄
0.5
mA
I₀
5
mA
50
P_tot
1.0
W
T_j
125
°C
T_amb
–25 to +70
°C
T_stg
–25 to +125
°C
2 (7)
Rev. A1: 14.09.1995