TDA4655 Datasheet, PDF (7/17 Pages) NXP Semiconductors – Generic multi-standard decoder

Philips Semiconductors
Generic multi-standard decoder
Preliminary specification
TDA4655
CHARACTERISTICS
Measured with application circuit (Fig.4) at T_amb = +25 °C, 8 V supply, 75% colour bar chrominance input signal of
200 mV (peak-to-peak value) and nominal phase for NTSC unless otherwise specified. All voltages measured
referenced to ground.
SYMBOL
V_P
I
PARAMETER
supply voltage
supply current
P_tot
total power dissipation
CONDITIONS
V_P = 8.0 V
without load
V_P = 8.0 V
without load
MIN.
7.2
25
TYP.
8.0
31
MAX. UNIT
8.8 V
37
mA
−
248 296 mW
CD signal outputs (pins 1 and 3)
PAL or NTSC
V₁
colour difference output signals
independent of supply voltage; note 1
−(R-Y) output PAL and NTSC 4.43 MHz
442 525 624
(peak-to-peak value)
NTSC 3.58 MHz (peak-to-peak value)
370 440 523
V₃
−(B-Y) output PAL and NTSC 4.43 MHz
(peak-to-peak value)
559 665 791
NTSC 3.58 MHz (peak-to-peak value)
468 557 662
V_PAL/V_NTSC
V₁/V₃
signal ratio PAL/NTSC 3.58 MHz
ratio of CD signal amplitudes
V(R-Y) / V(B-Y)
note 2
note 2
0.5 1.5 2.5
0.75 0.79 0.83
m
signal linearity −(R-Y) output
V₁ = 0.8 V (p-p)
0.8 −
−
signal linearity −(B-Y) output
V₃ = 1.0 V (p-p)
0.8 −
−
f_g
cut-off frequency (both outputs)
−3 dB
−
1
−
t_d
chrominance delay time
220 270 320
S/N
signal to noise ratio for nominal output
note 3
40
−
−
voltages
V_1, V₃
residual carrier at CD outputs:
1 × subcarrier frequency
(peak-to-peak value)
−
−
10
2 × subcarrier frequency
(peak-to-peak value)
note 4
−
−
30
H/2 content at R-Y output at nominal input
signal (peak-to-peak value)
−
−
10
A
R_1, R₃
I_1, I₃
SECAM
crosstalk between CD Channels
output resistance (npn emitter follower)
output current
−40 −
−
−
−
200
−
−
−3
V₁
V₃
V₁/V₃
m
colour difference output signals
independent of supply voltage; note 5
−(R-Y) output (peak-to-peak value)
0.95 1.05 1.15
−(B-Y) output (peak-to-peak value)
1.20 1.33 1.46
ratio of CD signal amplitudes V(R-Y)/(B-Y)
0.75 0.79 0.83
signal linearity at nominal output voltage
0.8 −
−
mV
mV
mV
mV
dB
−
−
−
MHz
ns
dB
mV
mV
mV
dB
Ω
mA
V
V
−
−
June 1993
7