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TDA2545A Datasheet(PDF) 4 Page - NXP Semiconductors |
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TDA2545A Datasheet(HTML) 4 Page - NXP Semiconductors |
4 / 8 page February 1985 4 Philips Semiconductors Product specification Quasi-split-sound circuit TDA2545A CHARACTERISTICS VP = V11-13 = 12 V; Tamb = 25 °C; measured at fVC = 38,9 MHz, fSC1 = 33,4 MHz, fSC2 = 33,158 MHz: Vision carrier (V.C.) modulated with different video signals (see below); modulation depth 100% (proportional to 10% residual carrier). Vision carrier amplitude (r.m.s. value) is VVC = 10 mV. Vision-to-sound carrier ratios are VC/SC1 = 13 dB and VC/SC2 = 20 dB. Sound carriers (SC1, SC2) modulated with f = 1 kHz and deviation ∆f= ± 30 kHz. For measuring circuit see Fig.2; unless otherwise specified. Note 1. Incidental phase on the vision carrier, caused by TV transmitter, has to be less than 0,5 degrees for black to white transient (equivalent to S +W/W = 56 dB for 6 kHz sinewave). PARAMETER SYMBOL MIN. TYP. MAX. UNIT Supply (pin 11) Supply voltage VP = V11-13 10,8 12 13,2 V Supply current IP = I11 33 45 55 mA I.F. amplifier Input voltage for start of gain control (intercarrier signals −3 dB) VVC1-16(rms) − 150 200 µV Input voltage for end of gain control (intercarrier signals + 1 dB) VVC1-16(rms) 100 250 − mV I.F. gain control range ∆G v 60 64 − dB Control voltage range (see Fig.3) V3-13 4 − Vp V Input resistance R1-16 − 2,5 − k Ω Input capacitance C1-16 − 1,5 − pF Intercarrier generation Output voltage; 5,5 MHz (r.m.s. value) V12-13(rms) 60 100 140 mV Output voltage; 5,742 MHz (r.m.s. value) V12-13(rms) 27 45 63 mV D.C. output voltage V12-13 − 5,9 − V Allowable d.c. load resistance at the output R12-13 7 −− k Ω Allowable output current −I12 −− 1mA Intercarrier signal-to-noise (see note 1) (measured behind the FM demodulators) weighted according to CCIR 468-2, quasi-peak a. 2T/20T pulses with white bars (see also Fig.4) at 5,5 MHz S +W/W 53 58 − dB at 5,742 MHz S +W/W 51 56 − dB b. 6 kHz sinewave at 5,5 MHz S +W/W 50 53 − dB at 5,742 MHz S +W/W 50 53 − dB c. black level (sync pulses only) at 5,5 MHz S +W/W 60 65 − dB at 5,742 MHz S +W/W 58 63 − dB |
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