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TDA8340 Scheda tecnica(PDF) 8 Page - NXP Semiconductors |
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TDA8340 Scheda tecnica(HTML) 8 Page - NXP Semiconductors |
8 / 14 page November 1987 8 Philips Semiconductors Product specification Television IF amplifier and demodulator TDA8340 TDA8341 Notes 1. All input signals are measured r.m.s. at top sync and 38,9 MHz. 2. Measured with 0 dB = 200 µV. 3. Tuner AGC starting point is defined as ‘level of input signal when tuner AGC current = 1 mA’. 4. Measured with pin 3 connected via 39 k Ω resistor to VCC (pin 11), with an r.m.s. voltage of 10 mV top sync input signal and with pin 12 not loaded. 5. At the ‘projected zero point’, e.g. with switched demodulator. 6. Measured in the circuit of Fig.7: the differential gain is expressed as a percentage of the difference in peak amplitudes between the largest and smallest value relative to the subcarrier amplitude at blanking level; the differential phase is defined as ‘the difference (in degrees) between the largest and smallest phase angles’. 7. Measured according to the test line shown in Fig.9: the non-linearity is expressed as a percentage of the maximum deviation of a luminance step from the mean step, with respect to the mean step; the mean step is (white level − black level) divided by the number of steps. 8. Measured up to 45 dB gain control. 9. Test set-up and input conditions for intermodulation measurements as in Figs 6 and 7. 10. Measured with a 75 Ω source: 11. Video output waveform showing white spot and noise inverter threshold levels. 12. Measured with input signal V1-16 = 10 mV and with no load at AFC output. SS N + () ⁄ 20log V out black to white V n rms () at B 5 MHz = -------------------------------------------------------- = Fig.2 AFC output voltage as a function of frequency. |
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