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TDA8295HN Arkusz danych(PDF) 4 Page - NXP Semiconductors |
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4 / 77 page TDA8295_1 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 01 — 4 February 2008 4 of 77 NXP Semiconductors TDA8295 Digital global standard low IF demodulator for analog TV and FM radio CVBS output Vo(p-p) peak-to-peak output voltage negative PC modulation (all standards except L/L-accent); 75 Ω DC load; sync-white modulation 90 % (nominal) 0.8 1.0 1.2 V positive PC modulation (L/L-accent standard); 75 Ω DC load; sync-white modulation 97 % (nominal) 0.8 1.0 1.2 V Bvideo(−3dB) −3 dB video bandwidth overall video response; CVBS equalizer flat all standards except M/N 4.8 4.85 - MHz M/N standard 3.9 4.05 - MHz αresp(f) frequency response video equalizer; 8 equally spaced settings; value at 3.9 MHz −5 - +4.5 dB Gdif differential gain “ITU-T J.63 line 330” - 1.5 3 % ϕdif differential phase “ITU-T J.63 line 330” - 1.5 3 deg (S/N)w weighted signal-to-noise ratio all standards; unified weighting filter ( “ITU-T J.61”); PC at −6 dBFS 58 62 - dB SSIF/mono sound output Vo(SSIF)(RMS) RMS SSIF output voltage 1 k Ω DC or AC load; no modulation; PC / SC1 = 13 dB; scaled linearly for all other ratios all standards except B/G/H 30 35 40 mV B/G/H standard 27 32 37 mV FM radio (single carrier) 460 530 610 mV Vo(AF)(RMS) RMS AF output voltage 1 k Ω DC or AC load M standard; 54 % modulation degree ( ±13.5 kHz FM deviation before pre-emphasis) 125 143 165 mV B, G/H, I, D, K standard; 54 % modulation degree ( ±27 kHz FM deviation before pre-emphasis) 125 143 165 mV αhr(AF) AF headroom before clipping; 1 k Ω DC or AC load M standard; related to ±25 kHz peak deviation before pre-emphasis 77 7dB B, G/H, I, D, K standard; related to ±50 kHz peak deviation before pre-emphasis 77 7dB THD total harmonic distortion FM; for 50 kHz deviation before pre-emphasis (25 kHz for M standard) - 0.1 0.2 % AM; m = 80 % - 0.6 1 % Table 1. Quick reference data …continued Power supplies 3.3 V, 1.2 V; Tamb =25 °C; PC / SC1 for L and M = 10 dB, all others 13 dB; residual picture carrier for L = 3 %, all others 10 %; FM/AM modulation = 54 %, 1 kHz modulation frequency; measured in application PCB (see Figure 12) with 16 MHz crystal frequency, loaded with 75 Ω (CVBS) and 1 kΩ (SSIF/audio). Values are meant for ‘easy programming’ settings (recommended) except internal mono audio and IF demodulation. The low IF spectrum is delivered by a professional downconverter. Symbol Parameter Conditions Min Typ Max Unit |
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