TDA2541-N FEATURES PIN CONFIGURATION Performs all video IF functions Provides 63dB IF AGC range N PACKAGE Tuner AGC output Pater D i) en Black and white noise inverting circuits DECOUPLING DECOUPLING CAPACITOR [2] CAPACITOR AFC output High input sensitivity--100,.V typical 53dB S/N ratio at 40dB gain control Minimal external components and ad- justments required Switch disabling of video to allow direct TUNER AGC TAKE. [-3 OVER ADJUST TUNER AGC OUTFUT AFC OUTPUT By AFC SWITCH [5 AGC CAPACITOR GND *Vec 5] wl 73] [12} vipeo ourpuT 77] rio] ro] SOUND CARRIER AFC AFC " DEMODULATOA DEMODULATOR video intertace with VTR NETWORK LZ CEN er WORK REFERENCE [5 REFERENCE Lo NETWORK LC NETWORK ORDER PART NO. TDA2541N ___] REFERENCE AFC DEMODULATOR AFC SWITCH LC NETWORK Le NETWORK (DEFEATS AFC DECOUPLING WHEN CLOSED) CAPACITOR r 4 e =] PO IE FEL TUNING y 2 15 8 9 7 10 + VOLTAGE ott 12v ~ REFERENCE AFC 5 | AFC OUTPUT ah SYNCHRONOUS 3 AMPLIFIER OEMODULATOR | AFC SWITCH IF 1 GAIN CONTROLLED ? Oo TUNER 1 | SELECTIVITY 45.75NiFlz 1F SYNCHRONOUS VIDEO FILTER iF INPUT AMPLIFIER DEMODULATOR PREAMPLIFIER VIDEO OUTPUT AND TRAPS 16 TDA 2541 | AGC . DETECTOR/ WHITE SPOT INTER-CARRIER TUNER AGC J NOISE INVERTER INVERTER FILTER OUTPUT at = 3 44 j 4.5MHz ro = TUNER AGC TAKE- OVER ADJUST > acc *Voc VV < < " VTR career] g SWITCH (DEFEATS VIDEO OUTPUT) 544 SijneticsTDA2541-N ABSOLUTE MAXIMUM RATINGS PARAMETER RATING UNIT Supply voltage Vcc 14 Vv Supply current (Voc = 14V) 75 mA Power dissipation (Vcc = 14V) 1.0 Ww Operating temperature 0 to +70 C Storage temperature -65 to +150 c DC ELECTRICAL CHARACTERISTICS Ta = 25C, Vcc = 12V unless otherwise specified. TDA 2541 PARAMETER TEST CONDITIONS UNIT Min Typ Max loc Supply current 37 67 mA VihiaFc) AFC switched off below 25 V Is AFC symmetry Vj =0,Vi4=0 -40 +40 BA Vin(VTR) VTR switch switches off below 14 Vv Vws White spot inverter threshold level 6.6 Vv Vpiws) White spot inversion clamping level 4.6 Vv VN Noise inverter threshold level 1.8 Vv Voin) Noise inversion clamping level 3.8 V \4 Tuner AGC output ON current - 10 mA Va(SaT) Tuner AGC output voltage lg = 10mA 300 mv lq Tuner AGC output OFF current 10 BA AC ELECTRICAL CHARACTERISTICS Ta = 25C, Vcc = 12V unless otherwise specified. PARAMETER TEST CONDITIONS TDA 2541 UNIT Min Typ Max IF input voltage for onset 70 100 140 Vv Vi of AGC (f = 45.75MHz) # Voz) Zero signal output level 5.7 6 6.3 Vv Vots) Top sync level 2.9 3 3.2 Vv V5 AFC output voltage swing 10 Vv AV, \F gain control range 50 63 dB S/N S/N at Vj = 10mV1 58 dB B 3dB bandwidth of video amplifier 6 MHz dG Differential gain2 4 10 % do Differential phase2 3 10 Intermodulation (1.1MHz)3 1.1MHz blue 46 60 dB 1.1MHz yellow 46 50 dB intermodulation (3.3MHz)4 3.3MHz 46 54 dB Carrier signal at video output 4 30 mv 2nd harmonic of carrier at video output 20 mV Change of frequency af for 10V AFC swing 100 200 kHz NOTES / 1. SN= Vo black to white V noise r.m.s. B = SMHz 2. Measured with the VZM-2 test set-up of Wandel & Goltermarin or equivalent. Measured between 10 and 75% of topsync level. 3. Intermodulation 1.1MHz = 20 tog (== 2 yg = 20 10g MOM yg cas " ton TAME = 20 10g (7p MHz ened ig TiMHz) | / Vg 4.4MHz 4, intermodulation 3.3MHz = 20 log | __.) 8 Vogamnz 08 Si N0tics 545== 54 TDA2541-N Qt VIDEO OUT Td 68 100 27pF ve yh ee = 4575MHz2 7 INPUT 16 15 14 13 12 1" 10 9 a = > Fees rm OD TDA2541 rr or IF SELECTIVITY AND TRAPS 1 2 3 4 5 6 7 8 | * | 002 ] ~ | z TL +12 WW FEEDBACK 1 J 56K 04 22pF LL NETWORK T 4 T T DECOUPLING | 100K Tz y = L. tunen ace 7 25% ~ AG 49.75MHz TAKEOVER ADJ 10V +12 100K a7 CLOSE TO DEFEAT 100 ' . -100KH2 \ + 100KHz T00K T i AFC | V-w | +12 = AFT 4m 330 = iF TUNER OUT AGC 3.3K TUNER, RF IN * Open NPN collector 10mA maximum TDA2541 VIDEO OUTPUT PIN 12 OUTPUT VOLTAGE (Vv) WHITE SPOT 7 INVERSION THRESHOLD 6.7 ZERO SIGNALLEVEL 64 WHITE LEVEL (CCIR) 5.7 se sro 5-4 WHITE SPOT CLAMPING LEVEL 4.5 NOISE (INVERTER CLAMPING 4 | LEVEL 3.8 7] rT TOPSYNC LEVEL 34 NOISE INVERSION THRESHOLD 1.8 546 SiNOtES