TDA8822 Datasheet, PDF (14/28 Pages) NXP Semiconductors – Universal I2C-bus programmable RF modulator

Philips Semiconductors
Universal I²C-bus programmable RF
modulator
Preliminary specification
TDA8822
CHARACTERISTICS
V_CCA = V_CCD = 5 V; T_amb = 25 °C; in PAL B/G, PAL I, PAL D/K, or NTSC; MD setting = 4; DEV setting = 2;
PS setting = 1; video input signal = 500 mV (p-p) EBU colour bars; audio input signal = 45 mV (p-p) 1 kHz sine wave;
unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Supply
I_P
power supply current
Video characteristics
I_VIDEO
z_VIDEO
m_d
video input current
video input impedance
modulation depth
m_d(clip)
m_d(TPSG)
m_d(APL)
S/N
G_diff
ϕ_diff
V/S
f_video
modulation depth during clipping
condition
modulation depth when TPSG mode
on
variation of the modulation depth with
change of APL between 10 and 90%
video signal-to-noise ratio
differential gain
differential phase
video-to-sync ratio
frequency response for the video
signal
analog and digital parts
part-to-part variation;
MD setting = 4
video input level lower
than 1 V (p-p)
part to part variation,
MD setting = 4
reference for APL = 50%
note 1
note 2
note 2
input signal: V/S = 7 : 3
note 3
−
60
−
0.5
30
−
77.5
82.5
−
−
72.5
82.5
−2
0
48
52
−
3
−
3
6.9 : 3.1 7 : 3
−1
−
72
mA
2.0
µA
−
kΩ
87.5
%
99
%
92.5
%
+2
%
−
dB
6
%
6
deg
7.1 : 2.9
+1
dB
Audio characteristics
Z_AUDIO
audio input impedance
without any resistor
30
−
−
kΩ
between AUDIO and
AGND
∆f_m
modulation deviation
SC setting = 1, 2 or 3; 20
25
30
kHz
DEV setting = 2
SC setting = 0;
DEV setting = 2
10
12.5 15
kHz
∆f_m(max) maximum modulation deviation
V_AUDIO = 500 mV (p-p); 180
250 −
kHz
note 4
THD
total harmonic distortion
50 mV (p-p) sine wave at −
1 kHz on AUDIO pin
0.4 1.0
%
S/N
audio signal-to-noise ratio
note 5
44
47
−
dB
f_AUDIO
frequency response of the audio signal note 6
−1
−
+1
dB
∆f_sc(acc)
sound subcarrier accuracy
note 7
−1
0
+1
kHz
P/S
picture-to-sound ratio
no audio signal; no video −15
−12 −9
dB
signal; PS setting = 1
1997 Jan 08
14