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LA1781M Folha de dados(PDF) 3 Page - Sanyo Semicon Device |
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LA1781M Folha de dados(HTML) 3 Page - Sanyo Semicon Device |
3 / 50 page Ratings Parameter Symbol Conditions min typ max unit [FM FE Mixer Input N-AGC on input VN-AGC 83 MHz, unmodulated. 81 88 95 dBµ The input such that the pin 2 voltage is 2.0 V or below W-AGC on input VWAGC 83 MHz, unmodulated. The input such that the pin 2 104 110 116 dBµ voltage is 2.0 V or below. (When the keyed AGC is set to 4.0 V.) Conversion gain A.V 83 MHz, 80 dBµ, unmodulated. The FE CF output 19 30 48 mVrms Oscillator buffer output VOSCBUFFFM No input 85 110 165 mVrms [NC Block] NC input (pin 30) Gate time τGATE1 f = 1 kHz, for a 1-µs, 100-mV p-o pulse 55 µs Noise sensitivity SN The level of a 1 = kHz, 1-µs pulse input that starts 40 mVp-o noise canceller operation. Measured at pin 30. The pulse rejection effect provided by the noise canceller. NC effect SN-NC For a repeated 1-µs wide pulse, frequency = 10 kHz, 5 150 mV p-o. The ratio of the FM mode pin 15 output referenced to the AM mode pin 15 output (effective value) [Multipath Rejection Circuit] MRC input (pin 27) MRC output VMRC V24 = 5 V 2.2 2.3 2.4 V MRC operating level MRC-ON The pin 32 input level at f = 70 kHz such that 10 15 20 mVrms pin 24 goes to 5 V and pin 27 goes to 2 V [AM Characteristics] AM ANT input Practical sensitivity S/N-30 1 MHz, 30 dBµ, fm = 1 kHz, 30% modulation, pin 15 20 dB Detector output VO-AM 1 MHz, 74 dBµ, fm = 1 kHz, 30% modulation, pin 15 130 195 270 mVrms Pin 31 detector output VO-AM31 1 MHz, 74 dBµ, fm = 1 kHz, 30% modulation, pin 31 110 175 230 mVms AGC F.O.M. VAGC-FOM 1 MHz, 74 dBµ, referenced to the output, the input amplitude 59 64 69 dB such that the output falls by 10 dB. Pin 15 Signal-to-noise ratio S/N-AM 1 MHz, 74 dBµ, fm = 1 kHz, 30% modulation 47 52 dB Total harmonic distortion THD-AM 1 MHz, 74 dBµ, fm = 1 kHz, 80% modulation 0.3 1 % Signal meter output VSM AM-1 No input 0.0 0.2 0.5 V VSM AM-2 1 MHz, 130 dBµ, unmodulated 3.5 4.4 6.1 V Oscillator buffer output VOSCBUFF AM1 No input, the pin 15 output 185 230 mVrms Wide band AGC sensitivity W-AGCsen1 1.4 MHz, the input when V46 = 0.7 V 92 98 104 dBµ W-AGCsen2 1.4 MHz, the input when V46 = 0.7 V (seek mode) 83 89 95 dBµ SD sensitivity SD-sen1 AM 1 MHz, the ANT input level such that the IF counter output turns on. 24 30 36 dBµ SD-sen2 AM 1 MHz, the ANT input level such that the SD pin goes to the on state. 24 30 36 dBµ IF buffer output VIFBUFF-AM 1 MHz, 74 dBµ, unmodulated. The pin 23 output 200 290 mVrms No. 6038-3/50 LA1781M Note: These measurements must be made using the either the IC-51-0644-824 or KS8277 IC socket (manufactured by Yamaichi Electronics). * 1. When the resistor between pin 58 and ground is 200 k Ω. * 2. When the resistor between pin 58 and ground is 30 k Ω. Continued from preceding page. |
Nº de peça semelhante - LA1781M |
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Descrição semelhante - LA1781M |
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