NJM2155 PRELIMINARY BBE Mach3Bass Audio Processor ■PACKAGE OUTLINE ■GENERAL 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 ■FEATURES ●Operating Voltage 4.7 to 13V ●Low Operating Current 15mA typ. ●Internal Mach3Bass ON/OFF Switch ●Internal High/Low Boost Switch (Low Band: 2.5 or 5.5dB, High Band: 6.0 or 9.0dB) ●”Mach3Bass” Boot Switch and Center Frequency Control ●Bipolar Technology ●Package Outline SDIP24, DMP24 ■BLOCK DIAGRAM & PIN CONFIGRATION 24 23 22 21 20 19 18 17 BBE 16 15 14 13 11 12 Mach3 Bias BBE 1 2 3 Control 4 5 6 7 8 9 10 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 - 1 - NJM2155 ■ ABSOLUTE MAXIMUM RATING (Ta=25°C) 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 + ■ELECTRICAL CHARACTERISTICS (Ta=25°C, V =9V, Rg=600Ω, RL=47kΩ, Vin=100mVrms/1kHz, VR1∗1) =500Ω, VR2∗1) =36kΩ) PARAMETER TEST CONDITION SYMBOL Operating Voltage V Operating Current Icc Reference Voltage VREF V /2 VIM f=1kHz + Maximum Input Voltage Boost1 Boost2 Boost Level Boost3 Boost4 Boost5 No Signal + f=20Hz, LO CONTOUR=L f=20Hz, LO CONTOUR=H f=1kHz f=20kHz, PROCESS=L f=20kHz, PROCESS=H MIN TYP MAX UNIT - 4.5 9.0 13.0 V BYPASS - - 8.0 - mA - - 4.0 4.5 5.0 V BYPASS - 2.8 - - Vrms ON - 1.5 2.5 3.5 ON - 4.5 5.5 6.5 ON - 0.0 0.6 1.2 ON - 5.0 6.0 7.0 ON - 8.0 9.0 10.0 ON ON 11.0 12.0 13.0 dB BBE Mach3 - dB Mach3 Boost Mach3 fc=80Hz Bypass Gain GVBYP f=1kHz BYPASS - -1.0 0.0 1.0 dB Total Harmonic Distortion THD f=1kHz ON ON - 0.05 0.11 % Output Noise VNO Vin=GND A-Weighting ON ON - -94 (20) -84 (63) dBV (µVrms) Mode Select Control Voltage VIH Vin=High Level 2.0 - V VIL Vin=Low Level 0 - 0.5 V ∗1), ∗2): Refer to APPLICATION CIRCUIT ■SWITCH FUNCTION Switch Terminal BBE Mach3Bass LO CONTOUR PROCESS -2- + 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) NJM2155 ■TERMINAL DESCRIPTION No SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ 1 24 InA InB Audio Signal Input (Ach) Audio Signal Input (Bch) VOLTAGE V+ V+/2 1,24 48k Vref V+ 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) V+ 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+ 21.5k V+/2 V+ 3 5 6 14 16 18 19 20 22 2,4,21,23 V+ V+/2 3,5,6,14,16 18,19,20,22 V+ 7 Filter Reference Voltage Filter 7 100k 100k V+ V+/2 - 3 - NJM2155 ■TERMINAL DESCRIPTION No SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ 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 VOLTAGE V+ 0V 8,9,10,11 100k V+ 15 LPIn V+ Mach3Bass Filter Input V+/2 15 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 ■ APPLICATION CIRCUIT Frequency Control VR1 Low High C13 C14 C15 3.3n 33n 4.7µ + 0.1µ R5 1k + 5k Boost Control 0.22µ C16 R6 27k VR2 0.22µ R7 LInB 18 17 16 15 LPIn HOutB 19 GOut HInB 20 56k GIn 21 Vref 22 OutB 23 LOutB 24 InB Max Min 50k 13 InA HInA HOutA LInA LOutA OutA Filter BBE PROCESS LO CONTOUR Mach3 V+ NJM2155 14 GND + 4.7µ C12 LPOut C11 C17 1 2 3 4 5 6 7 8 9 10 11 12 C1 4.7µ + C2 3.3n C3 33n C4 4.7µ + C5 10µ + R1 R2 C6 + 10µ 10k R3 C7 + 10µ 10k R4 C8 + C9 + 10µ 10k C10 + 10µ 10µ 10k V+ 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. - 5 - NJM2155 ■TYPICAL CHARACTERISTICS BBE Frequency Characteristics BBE Frequency Characteristics (V+=9V, Ta=25°C) 200 20 18 16 14 12 10 8 6 4 2 0 -2 150 C 100 C 50 Phase[ ] Gain[dB] (V+=9V, Ta=25°C) ° B A A 0 -50 B -100 -150 10 100 1,000 10,000 -200 100,000 10 100 1,000 Frequency[Hz] A: BYPASS B: PROCESS=L, LO CONTOUR=L C: PROCESS=H, LO CONTOUR=H BBE Mach3Bass frequency Characteristics BBE Mach3Bass frequency Characteristics (V+=9V, Ta=25°C, BBE=ON, PROCESS=L, LO CONTOUR=L, Mach3=ON) C Gain[dB] Gain[dB] (V+=9V, Ta=25°C, BBE=ON, PROCESS=H, LO CONTOUR=H, Mach3=ON) B A 10 100 1,000 10,000 Frequency[Hz] A: f=40Hz, VR1=6kΩ C: f=80Hz, VR1=500Ω -6- 100,000 Frequency[Hz] A: BYPASS B: PROCESS=L, LO CONTOUR=L C: PROCESS=H, LO CONTOUR=H 20 18 16 14 12 10 8 6 4 2 0 -2 10,000 B: f=60Hz, VR1=2kΩ 100,000 20 18 16 14 12 10 8 6 4 2 0 -2 D C B A 10 100 1,000 10,000 Frequency[Hz] A: 3.5dB, VR2=0kΩ C: 12dB, VR2=18kΩ B: 6dB, VR2=6.2kΩ D: 12dB, VR2=36kΩ 100,000 NJM2155 ■NOTE 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 -