參數(shù)資料
型號： TDA8722M-T
廠商： NXP SEMICONDUCTORS
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PDSO20
文件頁數(shù)： 4/28頁
文件大?。?/td> 155K
代理商： TDA8722M-T
1998 Jun 23
12
Philips Semiconductors
Product specication
I2C-bus programmable modulator for
negative video modulation and FM sound
TDA8722
Notes
1. Modulation depth when the video signal is between 560 and 1000 mV (peak-to-peak value) at pin 19. R17 = 120 k
in the application.
2. For application information only.
3. Ratio between the CCIR 17 line bar amplitude (corresponding to the level difference between black and white;
see Fig.4 and the RMS value of the noise on a black line (line 22 or 335) measured on the video signal after
demodulation for PAL G standard. Measurement is unweighted, done between 200 kHz and 5 MHz.
4. Measured for PAL G standard on 4 first steps of CCIR 330 line, corresponding to a 5 step staircase with
300 mV (peak-to-peak value) chrominance carrier when the level between synchronization pulse and white is 1 V;
see Fig.5.
5. Measured with a spectrum analyzer with ‘peak hold’ function, applying a 500 mV (peak-to-peak value) sine wave at
the video input of the IC, with a frequency of 0.5, 2.0, 4.0 and 4.8 MHz. The reference is the value measured for
1.0 MHz.
6. Measured using CCIR 468-3 weighting filter and quasi-peak detection, with an audio frequency of 1 kHz and a
deviation of 50 kHz. Video signal is EBU colour bars of 500 mV (peak-to-peak value) on pin 19.
7. Measured in PAL G standard with no pre-emphasis on the audio input and no de-emphasis in the receiver. Audio
input level is adjusted for having a deviation of 25 kHz at 1 kHz audio frequency. Measurement is done for
frequencies between 50 Hz and 15 kHz, reference is the level measured for 1 kHz.
8. Except for the harmonics of the RF oscillator frequency and for the combinations between the RF oscillator
frequency and the sound oscillator frequency (fRF +2fs, 2fRF +fs, etc.). This measurement includes the spurious at
the 1
4fRF,
1
2fRF and
3
4fRF.
9. Corresponding to the harmonics of the video signal. Measured by putting a 1 MHz sine wave of
500 mV (peak-to-peak value) at the video input (pin 19) and checking the level at fRF + 2 MHz, fRF + 3 MHz, etc.
10. Measured with a 4.43 MHz sine wave of 350 mV (peak-to-peak value) at the video input. Measurement is the
difference between the level of the unmodulated picture carrier and the level of the spike appearing at the frequency
of the picture carrier plus 1.07 MHz. C17 = 15 pF in the application diagram of Fig.7.
Output Port characteristics (P0)
VOL
LOW level output voltage
P0 = 1; I14 =5mA
150
400
mV
IOZ
OFF-state leakage current
P0 = 0; VDD = 5.5 V
10
A
I14(max)
maximum Port current
P0 = 1
10
mA
I2C-bus receiver characteristics (SDA and SCL)
VIH
HIGH level input voltage
3
5.5
V
VIL
LOW level input voltage
0
1.5
V
IIH
HIGH level input current
VIH =5V; VDD =0or 5V
10
A
IIL
LOW level input current
VIL =0V; VDD =0or5V
10
A
Vo
output voltage on SDA
during acknowledge
pulse; IIL =3mA
0.4
V
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
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