NJU7505

NJU7505 www.DataSheet4U.com BAND PASS FILTER FOR AUDIO SPECTRUM ANALYZER DISPLAY ! GENERAL DESCRIPTION The NJU7505 is a band pass filter for audio spectrum analyzer display. It consists of high and low band pass filters, CR oscillation circuit, control circuit and DC transfer circuit. Each band pass filter using the switched capacitor filter technology operates at the shared time by 5 bands which filter constant is switched by the internal clock. Therefore, the audio signal shared of 5 bands is output from a serial output terminal. The 10 bands version using the double by the cascade connection is prepared. ! PACKAGE OUTLINE NJU7505XD NJU7505XM ! FEATURES " BPF for the audio spectrum analyzer display of the 5 bands " 10 bands extension is available by the cascade connection (Version of A: For 5-band application by the single) (Version of B: For 10-band application by the double) " BPF using the switched capacitor filter technology " CR oscillation circuit on chip (External clock input is available) " Power-on initialization circuit on chip (External reset input is available) " C-MOS Technology " Package Outline DIP8, DMP8 ! PIN CONFIGURATION OSC1 OSC2 RST/CLKO RD 1 2 3 4 5 6 7 8 VDD AIN AOUT VSS ! BLOCK DIAGRAM RST/CLKO RD Audi o Signal Control Signa Crock Signal OSC1 OSC2 OSC f OSC f OSC/16 Cont rol Circuit f OSC/4 iH iL RL RH Power-on Initialize ΦH ΦL BPF High Band High Band Peak Detector Lev el Shif ter & Out Put BUF AOUT AIN Input BUF LPF BPF Low Band ...