TDA8722T/C1 데이터 시트보기 (PDF) - Philips Electronics

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TDA8722T/C1

I2C-bus programmable modulator for negative video modulation and FM sound

Philips Electronics 

Philips Semiconductors

I2C-bus programmable modulator for

negative video modulation and FM sound

Product specification

TDA8722

SYMBOL

PARAMETER

CONDITIONS

MIN. TYP. MAX. UNIT

Output Port characteristics (P0)

VOL

IOZ

I14(max)

LOW level output voltage

OFF-state leakage current

maximum Port current

P0 = 1; I14 = 5 mA

P0 = 0; VDD = 5.5 V

P0 = 1

−

150 400 mV

−

−

10

µA

−

−

10

mA

I2C-bus receiver characteristics (SDA and SCL)

VIH

HIGH level input voltage

VIL

LOW level input voltage

IIH

HIGH level input current

IIL

LOW level input current

Vo

output voltage on SDA

3

−

0

−

VIH = 5 V; VDD = 0 or 5 V −

−

VIL = 0 V; VDD = 0 or 5 V −10 −

during acknowledge

pulse; IIL = 3 mA

−

−

5.5

V

1.5

V

10

µA

−

µA

0.4

V

Notes

1. Modulation depth when the video signal is between 560 and 1000 mV (peak-to-peak value) at pin 19. R17 = 120 kΩ

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.

1998 Jun 23

12

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