Datasheet Sound Processors for Car Audios General-Purpose Electronic Volume with Built-in Advanced Switch BD37034FV-M General Description Key Specifications BD37034FV-M is sound processors for car audio. The Total harmonic distortion: 0.004%(Typ.) functions are stereo 5 input selector, volume, 3-band Maximum input voltage: 2.1Vrms(Typ.) equalizer, loudness, 6ch fader, mixing, HPF for front and Cross-talk between selectors: 100dB(Typ.) rear, LPF for subwoofer, anti-aliasing-filter, Hi-Voltage Ripple rejection -65dB(Typ.) output, output level detector. Moreover, Advanced Output noise voltage: 6Vrms(Typ.) switch circuit, that is ROHM original technology, can Residual output noise voltage: 4Vrms(Typ.) reduce various switching noise (ex. No-signal, low Operating Range of Temperature: -40 to +85 frequency likes 20Hz & large signal inputs). Advanced switch makes control of microcomputer easier, and can package(s) W(Typ.) x D(Typ.) x H(Max.) construct high quality car audio system. SSOP-B28 10.00mm x 7.60mm x 1.35mm Features Reduce switching noise of volume, mute, fader volume, mixing volume, bass, middle, treble, loudness by using advanced switch circuit Possible to control all steps . Built-in input selector (single 3 / diff 2). Decrease the number of external components by built-in 3-band equalizer filter, LPF for subwoofer, loudness filter. And, possible to control Q, Gv, fo of 3-band equalizer and fc of LPF, Gv, fo of 2 loudness by I C BUS control freely. Built-in mixing volume, Hi-Voltage output. Built-in anti-aliasing-filter, anti-GSM-noise-filter. Package is SSOP-B28. Putting input-terminals SSOP-B28 together and output-terminals together can make PCB layout easier and can makes area of PCB smaller. 2 It is possible to control by 3.3V / 5V for I C BUS. AEC-Q100 Qualified. Applications It is the optimal for the car audio. Besides, it is possible to use for the audio equipment of mini Compo, micro Compo, TV etc with all kinds. Typical Application Circuit Figure 1. Application Circuit Diagram Product structure:Silicon monolithic integrated circuit This product is not designed protection against radioactive rays www.rohm.com TSZ02201-0C2C0E100010-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/44 TSZ2211114001 4.OCT.2013 Rev.002Datasheet BD37034FV-M Pin Configuration SSOP-B28 (TOP VIEW) A1 1 28 VREF A2 2 27 GND B1 3 26 SDA B2 4 25 SCL C1 5 24 VCCL C2 6 23 OUTF1 DP1 7 22 OUTF2 DN 8 21 OUTR1 DP2 9 20 OUTR2 EP1 10 19 OUTS1 EN1 11 18 OUTS2 MIN/EN2 12 17 LOUT/OLD EP2 13 16 LRST/OLDC VCCH 14 15 MUTE Figure 2. Pin configuration Pin Descriptions Terminal Terminal Terminal Terminal Description Description Number Name Number Name 1 A1 A input terminal of 1ch 15 MUTE External compulsory mute terminal Level meter reset terminal 2 A2 A input terminal of 2ch 16 LRST/OLDC Filter output terminal of output level detector Output terminal for Level meter 3 B1 B input terminal of 1ch 17 LOUT/OLD Output terminal of output level detector 4 B2 B input terminal of 2ch 18 OUTS2 SW output terminal of 2ch 5 C1 C input terminal of 1ch 19 OUTS1 SW output terminal of 1ch 6 C2 C input terminal of 2ch 20 OUTR2 Rear output terminal of 2ch 7 DP1 D positive input terminal of 1ch 21 OUTR1 Rear output terminal of 1ch 8 DN D negative input terminal 22 OUTF2 Front output terminal of 2ch 9 DP2 D positive input terminal of 2ch 23 OUTF1 Front output terminal of 1ch 10 EP1 E positive input terminal of 1ch 24 VCCL VCCL terminal for power supply 2 11 EN1 E negative input terminal of 1ch 25 SCL I C Communication clock terminal Mixing input terminal 2 12 MIN/EN2 26 SDA I C Communication data terminal E negative input terminal of 2ch 13 EP2 E positive input terminal of 2ch 27 GND GND terminal 14 VCCH VCCH terminal for power supply 28 VREF VREF terminal w ww.rohm.com TSZ02201-0C2C0E100010-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/44 TSZ2211115001 4.OCT.2013 Rev.002