TDA4471 Datasheet, PDF (10/16 Pages) TEMIC Semiconductors – Multistandard Video-IF and Quasi Parallel Sound Processing

TDA4471
TELEFUNKEN Semiconductors
Notes:
1. This parameter is given as an application information and not tested during production.
2. Adjustment of turn over point (delayed tuner AGC) with external resistor R_top or external voltage V_top.
3. The oscillator drift is related to picture carrier frequency, at external temperature-compensated LC
circuit
4. (1.07) = 20 log (4.43 MHz component/1.07 MHz component);
(1.07) value related to black–white signal
input signal conditions: picture carrier 0 dB
colour carrier
–6 dB
sound carrier –24 dB
5. Without external control voltage at Pin 15 (open circuit) the IC automatically operates in mode :
negative modulated video IF and FM/NICAM sound signals
Voltage at Pin 15
(standard switch)
Selected standard
(mode)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{0 – 0.8 V}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{mode 2 (L standard)}
VIF: pos. modulation
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{SIF: AM + NICAM}
2.0V – Vs
(or Pin 15 open)
mode 1 (B/G standard)
VIF: neg. modulation
SIF: FM/ NICAM
6. Without control voltage at Pin 21 (open circuit) the falling AFC curve is automatically selected
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Voltage at Pin 21}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ^{(AFC switch)}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ^{AFC function}
0 – 0.8 V
AFC switched OFF
1.5 – 2.5 V
AFC curve rising
3.5 V – Vs
(or Pin 21 open)
AFC curve falling
7. Without control voltage at Pin 16 (open circuit) the L’ switch is not active.
St Package
Mode 1: neg. modulation (B/G)
Mode 2: pos. modulation (L)
(Dimensions in mm) stan-
dard switch, Pin 15
2.0 V – VS
0 – 0.8 V
L’/VIF input switch, Pin 16 3.4 V – 4.5 V
0 – 3.1 V
3.4 V – 4.5 V
0 – 3.1 V
(or Pin 16 open)
(or Pin 16 open)
Ext. voltage at VIF input 2, open 1 V open 1 V open 1 V open 1 V
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Pin 10 or 11}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _Modulation
neg. neg. neg.
*)
neg. neg. neg. neg.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _Standard
B/G,... B/G,... B/G,... *)
L
L
L’
L’
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Active VIF input}
VIF1 VIF1 VIF2
*)
VIF2 VIF1 VIF2 VIF1
*) condition not useful
8. Picture carrier PC = 38.9 MHz; sound carrier SC₁ = 33.4 MHz, SC₂ = 33.16 MHz;
PC/SC₁ =13 dB; PC/SC₂ = 20 dB; PC unmodulated (equivalent to sync peak level)
9. Sound carrier SC = 32.4 MHz, modulated with f_mod = 1 kHz, m = 54 %; v_in = 10 mV
10 (16)
Preliminary Information
Rev. A1: 18.08.1995