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TDA8708 Folha de dados(PDF) 9 Page - NXP Semiconductors |
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TDA8708 Folha de dados(HTML) 9 Page - NXP Semiconductors |
9 / 24 page June 1994 9 Philips Semiconductors Product specification Video analog input interface TDA8708A Notes 1. 0 dB is obtained at the AGC amplifier when applying Vi(p-p) = 1.33 V. 2. The output current at pin 19 should not exceed 1 mA. The load impedance RL should be referenced to VCCA and defined as: a) AC impedance ≥1kΩ and the DC impedance >2.7 kΩ. b) The load impedance should be coupled directly to the output of the amplifier so that the DC voltage supplied by the clamp is not disturbed. 3. Control mode 2 is selected. 4. Signal-to-noise ratio measured with 5 MHz bandwidth: 5. The voltage ratio is expressed as: for VI = 1 V (p-p), gain at 100 kHz = 1 and 1 V supply variation. 6. It is recommended that the rise and fall times of the clock are ≥2 ns. In addition, a ‘good layout’ for the digital and analog grounds is recommended. 7. These measurements are realized on analog signals after a digital-to-analog conversion (TDA8702 is used). 8. The supply voltage rejection is the relative variation of the analog signal (full-scale signal at input) for 1 V of supply variation: 9. Full-scale sine wave (fi = 4.4 MHz; fclk = 27 MHz). S N ---- 20 log V ANOUTC p p – () V ANOUTY (RMS noise) -------------------------------------------------at B = 5 MHz. = SVRR1 20 log ∆V CCA V CCA ------------------ G ∆G -------- × = SVRR2 ∆ V I00 () V IFF () – () V I00 () V IFF () – () + ∆V CCA ----------------------------------------------------------------------------------------------------- = |
Nº de peça semelhante - TDA8708 |
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Descrição semelhante - TDA8708 |
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