TDA4455 Datasheet, PDF (5/12 Pages) TEMIC Semiconductors – Multistandard VIF Amplifier and PLL Demodulator

TELEFUNKEN Semiconductors
TDA4455
Parameters
Test Conditions / Pins Symbol Min.
Typ.
Max.
Unit
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ IF residual voltage
f = 38.9 MHz
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{f = 77.8 MHz}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Upsetting factor of sync}
V_res1
2
mV
V_res2
5
mV
DVsync
3
%
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{pulse in the AGC range}
Vsync
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Tilt of half picture
between black and white
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Ultra black limiting}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _threshold
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Ultra white limiting}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ threshold
Standard L
Below sync level
Above ultra white level
DV_lim1
DV_lim2
5
10
%
250
mV
500
mV
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ^{Standard switch}
Pin 11
Control voltage B/G
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Control voltage L}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Control voltage D2MAC}
Note 6
V_sw1
2.5
V_sw2
0
V_sw3
5.0
4.0
V
1.5
V
V_s
V
Input selector switch
Pin 16
Control voltage – input 1
active
Note 7
5.0
V_S
V
Control voltage – input 2
0
2.5
V
active
Notes
1. A peak white value for at least 10 µs must be trans-
mitted for each complete frame
2. Loop filter: R1 = 500 W – 1 k, C1 = 0.47 mF
Capacitor VCO circuit: C_VCO = 27 – 47 pF
3. Pin 7 unloaded
4. Residual carrier: 10% carrier amplitude
5. Blanking level: 30% carrier amplitude
6. Without control voltage at Pin 11 – standard B/G is
automatically selected
7. Without control voltage at Pin 16 – input 1 is auto-
matically active
Alignment of the VCO
1. Apply 4.5 V to Pin 6, to disable the broadband
amplifier.
2. Measure the dc-voltage at Pin 12 (phase detector).
3. Apply a 38.9 MHz unmodulated carrier signal to the
IF input (Pins 1–2 or Pins 17–18); adjust the input
level so that the AGC voltage at Pin 6 is between
2.0 V and 2.5 V.
4. Adjust the VCO circuit until at Pin 12 is the same DC-
voltage as measured in step 2.
Rev. A1: 08.05.1995
Preliminary Information
5 (12)