Featured Products High quality High fidelity Sound Processors for Car AV BD37033FV / BD37034FV / BD37068FV / BD34701KS2 Dedicated analog technology utilized for high resolution audio with superior noise reduction Low Distortion Low Noise High Fidelity Reduced switching pop noise Decreases noise in mobile phones through-sounds from external sources process technology that improves noise characteristics in the lowfrequency region Achieves significantly lower distortion through marketproven expertise Optimized distortion and noise countermeasures Minimal Noise Reduced Distortion Output Amplitude vs. Distortion Frequency vs. Noise 1 -100 Standard Audio -110 Standard Audio Noise (dB) THD+N (%) 0.1 0.01 0.001 Reduced -120 10x -130 10x New New lower 0.0001 0.001 -140 0.005 0.01 0.05 Vo (Vrms) 0.1 0.2 0.5 1 2 10 20 50 100 200 500 1ｋ 2ｋ 5ｋ 10ｋ 20ｋ Frequency (Hz) Technology cultivated over many years has allowed ROHM to successfully minimize distortion and noise in regions that cannot be reproduced through simulation, contributing to superior audio quality Smooth, natural volume control Advanced switching performance With Switching Volume control is considered the most important function of a sound processor. ROHM has been working to achieve natural volume adjustment utilizing advanced proprietary switching technology that eliminates popping noise for smooth switching similar to analog volume control. Magnified Magnified Without Switching Natural, smooth volume adjustment Considerably lower RF noise from mobile phones New Conventional Noise reduced by more than 10x Unpleasant noise may be generated in car audio systems a few seconds before receiving phone calls. To prevent this, ROHM has developed technology that reduces this RF noise by more than 10 times with no degradation in sound quality. No through-noise from external audio sources (when OFF) Through-Sound New Conventional Power OFF Audio Sound leakage reduced more than 30x Power Amp. A sound leakage prevention function is built in that minimizes through-sound from external sources by more than 30x at power OFF when using an external power amp. (BD37034FV) Lineup (With Advanced Switching Function) Recommended Applications Car Audio Car Audio (DSP Compatible) Part No. (DSP Compatible) − Tone Control External High Voltage (bands) Input (ch) Output Volume (ch) Fader (ch) 5 2 6 3 − 5 2 6 3 − Package BD37033FV 7.0 to 9.5 BD37034FV VCCL=7.0 to 9.5 VCCH=VCCL to 13.0 BD37534FV 7.0 to 9.5 − − 6 2 6 3 − − SSOP-B28 BD37523FS 7.0 to 9.5 − − 5 2 5 2 − − SSOP-A24 BD37503FV 7.0 to 9.5 − − 4 2 4 2 − − SSOP-B20 BD37068FV VCCL=7.0 to 9.5 VCCH=VCCL to 17.0 − 6 6 − 6 − SSOP-B28 SSOP-B28 SSOP-B40 BD3461FS 7.0 to 9.5 − − − 6 − 6 − SSOP-A24 BD3465FV 7.0 to 9.5 − − − 4 − 4 − SSOP-B20 − 12 8 − 8 SQFP-T52 8 − 8 SQFP-T80C 6 − 6 SQFP-T80C BD34701KS2 AV Receivers Operating Voltage RF Noise Pop Noise Sound Input Leakage Source (ch) (V) Reduction Reduction Prevention ±6.5 to ±7.5 BD3473KS2 ±6.5 to ±7.5 − − 18 BD3474KS2 ±6.5 to ±7.5 − − 16 The contents specified in this document are correct as of February 1st, 2014. [O_033] Catalog No. 02.2014 ROHM © PDF