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Datasheet File OCR Text: |
Silicore ONE CHIP AM RADIO CIRCUIT DESCRIPTION The CD7642 CS is suitable for low voltage po rtable www..com CD7642CP Outline Drawing Radio, cassette system and other wireless AM system. The package of CD7642CS is TO-92. FEATURE Low operating voltage: Down to VCC=1.3V Low Quiescent Cu rrent: ICCO=0.2 mA Low external component requ ired. EQUIVALENT CIRCUIT 1 ABSOLUTE MAXIMUM RATINGS (Ta=25 C) Characteristic Supply Vo ltage Operating Te mperature Storage Temp erature Symbol Vcc Topr Tstg Value 6 -10~60 -55~150 Unit w w w t a .D S a e h U t4 e .c m o 3 2 SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn CHMC w w w .D at Sh a 4U t eC e C 1/3 V om .c Silicore ELECTRICAL CHARACTERISTICS CD7642CS (Unless otherwise specified: Ta=2 5C, Vcc=1.3V, fm=1kHz, fo=1MHz,MOD=30%) Characteristics Supply Voltage Quiescent Current www..com Test conditions Vi=0 VOD=3 mV Vi=10 mV Symbol Vcc Icco Ri SM VOD A Min. 1.2 0.14 Typ. 1.3 0.2 3 600 Max. 1.6 0.3 Unit V mA M V Input Resistance Maximu m Sensitivity Detector Ou tput Vo ltage The Range of AGC 5 15 30 30 mV dB TEST CIRCUIT 100K 0.1uF 2 CD7642CS 3 Vin 50 1 R AGC 1.5K Vcc Vout 0.1uF APPLICATION CIRCUIT R AGC 820K 100K 1.5K 7.5K Vcc=1.2~1.5V 30K 32 1K 600uH 140pF 7pF 2 CD7642CS 3 1 0.01uF 0.15uF 0.1uF Circuit 1 SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 2/3 CHMC Silicore R AGC 100K 1K 1.5M 50pF 0.1uF 0.15uF 57 CD7642CS 600uH 140pF 7pF 1.5V 32 2 CD7642CS 3 1 0.01uF www..com Circuit 2 R AGC 10K 100K 600uH 140pF 7pF 2 CD7642CS 3 1 0.01uF 0.1uF 0.1uF 100K 1K 1.5V Circuit 3 CHARACTERISTIC CURVE Detector Output Voltage VOD (dBu) Input Vo ltage Vi (dBu) SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 3/3 CHMC |
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