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| NJM2155 PRELIMINARY BBE Mach3Bass Audio Processor sPACKAGE OUTLINE sGENERAL DESCRIPTION NJM2155 is a BBE Mach3Bass processor, which includes BBE sound enhancement and Mach3Bass system. The BBE reproduces high definitive and Mach3BASS provides rich and loss less bass sound. The NJM2155 is suitable for audio items such as TV, AV receiver, CD radio-cassette, speaker system, and others. NJM2155L NJM2155M sFEATURES qOperating Voltage 4.7 to 13V qLow Operating Current 15mA typ. qInternal Mach3Bass ON/OFF Switch qInternal High/Low Boost Switch (Low Band: 2.5 or 5.5dB, High Band: 6.0 or 9.0dB) q"Mach3Bass" Boot Switch and Center Frequency Control qBipolar Technology qPackage Outline SDIP24, DMP24 sBLOCK DIAGRAM & PIN CONFIGRATION 1. InA 2. HInA 3. HOutA 4. LInA 5. LOutA 6. OutA 7. Filter 8. BBE 9. PROCESS 10. LO CONTOUR 11. Mach3Bass 12. V+ 13. GND 14. LPOut 15. LPIn 16. GOut 17. GIn 18. Vref 19. OutB 20. LOutB 21. LInB 22. HOutB 23. HInB 24. InB 24 23 22 21 20 19 18 17 16 15 14 13 BBE Mach3 Bias BBE Control 1 2 3 4 5 6 7 8 9 10 11 12 -1- NJM2155 s ABSOLUTE MAXIMUM RATING (Ta=25C) PARAMETER SYMBOL + Supply Voltage V Power Dissipation PD Operating Temperature Range Topr Storage Temperature Range Tstg TEST CONDITION 15 700 -40 to +85 -40 to +125 + UNIT V mW C C sELECTRICAL CHARACTERISTICS (Ta=25C, V =9V, Rg=600, RL=47k, Vin=100mVrms/1kHz, VR11) =500, VR21) =36k) PARAMETER Operating Voltage Operating Current Reference Voltage Maximum Input Voltage SYMBOL TEST CONDITION BBE Mach3 ON ON ON MIN 4.5 4.0 2.8 1.5 4.5 0.0 5.0 8.0 11.0 -1.0 2.0 0 TYP 9.0 8.0 4.5 2.5 5.5 0.6 6.0 9.0 12.0 0.0 0.05 -94 (20) - MAX 13.0 5.0 3.5 6.5 1.2 7.0 10.0 13.0 1.0 0.11 -84 (63) V + UNIT V mA V Vrms V + No Signal V /2 f=1kHz f=20Hz, LO CONTOUR=L f=20Hz, LO CONTOUR=H f=1kHz f=20kHz, PROCESS=L f=20kHz, PROCESS=H fc=80Hz f=1kHz f=1kHz Vin=GND A-Weighting Vin=High Level Vin=Low Level + Icc VREF VIM Boost1 Boost2 BYPASS BYPASS ON ON ON ON ON ON BYPASS Boost Level Boost3 Boost4 Boost5 dB Mach3 Boost Bypass Gain Total Harmonic Distortion Output Noise Mode Select Control Voltage Mach3 GVBYP THD VNO VIH VIL dB dB % dBV (Vrms) V ON ON 0.5 1), 2): Refer to APPLICATION CIRCUIT sSWITCH FUNCTION Switch Terminal BBE Mach3Bass LO CONTOUR PROCESS Control Voltage Level Low High Low High Low High Low High FUNCTION BYPASS BBE ON Mach3Bass OFF (with BBE switch on) Mach3Bass ON (with BBE switch on) Low Frequency: +2.5dB Boost (with BBE switch on) Low Frequency: +5.5dB Boost (with BBE switch on) High Frequency: +6.0dB Boost (with BBE switch on) High Frequency: +9.0dB Boost (with BBE switch on) -2- NJM2155 sTERMINAL DESCRIPTION No SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ V+ VOLTAGE 1 24 InA InB Audio Signal Input (Ach) Audio Signal Input (Bch) V+/2 1,24 48k Vref V+ V+ V+ 2,4,21,23 2 4 21 23 HinA LinA LinB HinB BBE High Pass Filter Input (Ach) BBE Low Pass Filter Input (Ach) BBE Low Pass Filter Input (Bch) BBE High Pass Filter Input (Bch) 21.5k V+/2 V+ V+ 3 5 6 14 16 18 19 20 22 HOutA LOutA OutA LPOut GOut Vref OutB LOutB HOutB BBE High Pass Filter Output (Ach) BBE Low Pass Filter Output (Ach) Audio Signal Output (Ach) Mach3Bass Filter Output Output for Mach3Bass Gain Adjustment Reference Voltage Output Audio Signal Output (Bch) BBE Low Pass Filter Output (Bch) BBE High Pass Filter Output (Bch) V+/2 3,5,6,14,16 18,19,20,22 V+ V+ 7 100k 7 Filter Reference Voltage Filter 100k V+/2 -3- NJM2155 sTERMINAL DESCRIPTION No SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ V+ VOLTAGE 8 9 10 11 BBE PROCESS LO CONTOUR Mach3 BBE ON/OFF Control Boost Level Control for High Band Boost Level Control for Low Band Mach3Bass ON/OFF Control 0V 8,9,10,11 100k V+ V+ 15 LPIn Mach3Bass Filter Input 15 V+/2 V+ V+ 17 V+ 12k 17 Gin Input for Mach3Bass Gain Adjustment V+/2 12 V+ Power Supply V+ 13 GND GND 0V -4- NJM2155 s APPLICATION CIRCUIT Frequency Control VR1 Low High C11 4.7 + C12 3.3n C13 33n C14 4.7 C15 + 0.1 R5 1k + 5k Boost Control VR2 Max Min 50k C17 0.22 C16 0.22 R7 56k R6 27k 24 InB 23 HInB 22 HOutB 21 LInB 20 LOutB 19 OutB 18 Vref 17 GIn 16 GOut 15 LPIn 14 LPOut 13 GND 12 V+ LO CONTOUR NJM2155 PROCESS HOutA LOutA OutA HInA Filter BBE LInA InA 1 2 3 4 5 6 7 8 9 Mach3 10 11 C1 4.7 + C2 3.3n C3 33n C4 4.7 + C5 10 + R1 R2 C6 + 10 10k R3 C7 + 10 10k R4 C8 + C9 + 10 10k 10 10k V+ GND V+ GND V+ GND V+ GND 1) C2, C3, C12 and C13 decide the BBE characteristics. Use the specified value. 2) C16, C17, R5, R6 and R7 decide the Mach3Bass characteristics. Use the specified value. 3) VR1 controls Center Frequency for Mach3Bass. 4) VR2 controls Boost Gain for Mach3Bass. V+ C10 + 10 -5- NJM2155 sTYPICAL CHARACTERISTICS BBE Frequency Characteristics (V+=9V, Ta=25C) BBE Frequency Characteristics (V+=9V, Ta=25C) 20 18 16 14 12 10 8 6 4 2 0 -2 10 100 1,000 Frequency[Hz] 10,000 200 150 100 B A C Phase[ ] Gain[dB] C 50 0 -50 -100 -150 B A 100,000 -200 10 100 1,000 Frequency[Hz] 10,000 100,000 A: BYPASS B: PROCESS=L, LO CONTOUR=L C: PROCESS=H, LO CONTOUR=H A: BYPASS B: PROCESS=L, LO CONTOUR=L C: PROCESS=H, LO CONTOUR=H BBE Mach3Bass frequency Characteristics (V+=9V, Ta=25C, BBE=ON, PROCESS=H, LO CONTOUR=H, Mach3=ON) BBE Mach3Bass frequency Characteristics (V+=9V, Ta=25C, BBE=ON, PROCESS=L, LO CONTOUR=L, Mach3=ON) 20 18 16 14 12 10 8 6 4 2 0 -2 10 C B A 20 18 16 14 12 10 8 6 4 2 0 -2 10 D Gain[dB] Gain[dB] C B A 100 1,000 Frequency[Hz] 10,000 100,000 100 1,000 Frequency[Hz] 10,000 100,000 A: f=40Hz, VR1=6k C: f=80Hz, VR1=500 B: f=60Hz, VR1=2k A: 3.5dB, VR2=0k C: 12dB, VR2=18k B: 6dB, VR2=6.2k D: 12dB, VR2=36k -6- NJM2155 sNOTE BBE is a registered trademark of BBE Sound Inc. A license from BBE Sound Inc. is required before the NJM2155 can be purchased from New Japan Radio Co., Ltd. BBE Sound, Inc. 5381 Production Drive Huntington Beach, CA 92649 Tel:(714)897-6766 Fax:(714)896-0736 [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. -7- |
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