View BD37524FS-E2_3572390.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1/25 www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. sound processor series for car audio sound processor with built-in 3-band equalizer bd37524fs description bd37524fs is sound processors built-in 3-band equalizer fo r car audio. the functions are stereo 5ch input selector, input-gain control, main volume, loudness, 5ch fader volume , lpf for subwoofer, level meter. moreover, ?advanced switch circuit?, that is rohm original technology, can reduce vari ous switching noise (ex. no-signal, low frequency likes 20hz & large signal inputs). ?advanced switch? makes control of mi crocomputer easier, and can construct high quality car audio system. features 1) reduce switching noise of input gain control, mute, main volume, fader volume, bass, treble, loudness by using advanced switch circuit [possible to control all steps] 2) built-in 1 differential input select or and 4 single-ended input selectors 3) built-in ground isolation amplifier i nputs, ideal for external stereo input. 4) built-in input gain controller reduces switchi ng noise for volume of a portable audio input. 5) 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, fo, gv of loudness by i 2 c bus control freely 6) it is possible for the bass, middle, and treble to the ga in adjustment quantity of 20d b and 1 db step gain adjustment. 7) terminals for the subwoofer outputs are equipped. 8) bi-cmos process is suitable for the design of low current and low energy. and it provides more quality for small scale regulator and heat in a set. 9) package is ssop-a24. putting input-terminals together and output-terminals together can make pcb layout easier and can makes area of pcb smaller. 10) it is possible to control by 3.3v / 5v for i 2 c bus. 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. no.10085eat05
technical note 2/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. line up matrix ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? absolute maximum ratings (ta=25 ? operating conditions item symbol min typ max unit power supply voltage vcc 7.0
technical note 3/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. electrical characteristics (unless specified particularly, ta=25 ? ? block general ? ? ? ? input selector ? ? ? input gain mute volume
technical note 4/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. block bass middle 0 2 db gain=-20 treble 0 2 db gain=-20 fader / subwoofer ? loudness level meter
technical note 5/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. electrical characteristic curves (reference data) 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 vout ( v) thd+n ( % 0.001 0.01 0.1 1 10 vo u thd+n[%] vout [vrms] vin[vrms] -25 -20 -15 -10 -5 0 5 10 15 20 25 10 100 1k 10k 100k frequency [hz] gain[db] 0 10 20 30 40 50 0246810 vcc[v] iq[ma] frequency [hz] frequency [hz] frequency [hz] -25 -20 -15 -10 -5 0 5 10 15 20 25 10 100 1k 10k 100k frequency [hz] gain[db] -5 -4 -3 -2 -1 0 1 2 3 4 5 10 100 1k 10k 100k fr equency ( hz) gai n ( db gain[db] frequency [hz] 10khz 1khz 100hz gain=0db bass gain : -20
technical note 6/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. 1 10 100 1000 -80 -70 -60 -50 -40 -30 -20 -10 0 10 20 volume gain[db] j?R[uvrms] din-audio ihf-a -70 -60 -50 -40 -30 -20 -10 0 10 100 1k 10k 100k fr eq uency ( hz) gai n ( d b 0 0.5 1 1.5 2 2.5 3 3.5 00.511.522.53 1 10 100 1000 -20 -15 -10 -5 0 5 10 15 20 treble gain [db] j?R [uvrms] din-audio ihf-a 1 10 100 1000 -20 -15 -10 -5 0 5 10 15 20 bass gain [db] j?R [uvrms] din-audio ihf-a 1 10 100 1000 -20 -15 -10 -5 0 5 10 15 20 middle gain [db] j?R [uvrms] din-audio ihf-a 0.0 0.5 1.0 1.5 2.0 2.5 100 1000 10000 100000 ?[ohm] [vrms]
technical note 7/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. block diagram and pin configuration descriptions of terminal terminal no. terminal name description terminal no. terminal name description 1 fil vcc/2 terminal 13 mute external compulsory mute terminal 2 a1 a input terminal of 1ch 14 lout output terminal for level meter 3 a2 a input terminal of 2ch 15 outs2 subwoofer output terminal of 2ch 4 b1 b input terminal of 1ch 16 outs1 subwoofer output terminal of 1ch 5 b2 b input terminal of 2ch 17 outr2 rear output terminal of 2ch 6 cp1 c positive input terminal of 1ch 18 outr1 rear output terminal of 1ch 7 cn c negative input terminal 19 outf2 front output terminal of 2ch 8 cp2 c positive input terminal of 2ch 20 outf1 front output terminal of 1ch 9 d1 d input terminal of 1ch 21 vcc power supply terminal 10 d2 d input terminal of 2ch 22 scl i 2 c communication clock terminal 11 e1 e input terminal of 1ch 23 sda i 2 c communication data terminal 12 e2 e input terminal of 2ch 24 gnd gnd terminal gnd vcc/2 volume/mute 3 band p-eq (tone control) loudness fader fader fader fader fader lpf input gain gnd iso amp input selector (4 single-end and 1 stereo iso) 14 100k 100k 100k 100k 250k gnd iso amp 250k 250k 250k 250k 250k 250k level meter vcc i 2 c bus logic fader gain:+15db-79b/1db step no pop noise lpf fc= 55/85/120/160hz loudness gain:20db0b/1b step no pop noise ?0=250/400/800hz ?hicut:1/2/3/4 3 band p-eq (tone control) gain+20db-20db/1db step no pop noise ?bassf0=60/80/100/120hz q=0.5/1.0/1.5/2.0 ?meddle:f0=500/1k/1.5k/2.5khz q=0.75/ 1/1.25/1.5 ?treblef0=7.5k/10k/12.5k/15khz q=0.75/1.25 volume gain+15db-79db/1db step no pop noise input gain gain+20db0db/1db step no pop noise 1 2 3 4 5 6 7 8 9 10 11 12 13 24 23 22 21 20 19 18 17 16 15
technical note 8/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. timming chart control signal specification () electrical specifications and timing for bus lines and i/o stages fig.23 definition of timing on the i 2 c-bus parameter symbol fast-mode i 2 c-bus unit min. max. 1 scl clock frequency scl 0 400 khz 2 bus free time between a stop and start condition tbuf 1.3 s 3 hold time (repeated) start condition. after this period, the fi rst clock pulse is generated thd;sta 0.6 s 4 low period of the scl clock tlow 1.3 s 5 high period of the scl clock thigh 0.6 s 6 set-up time for a repeated start condition tsu;sta 0.6 s 7 data hold time: thd;dat 0.06* s 8 data set-up time tsu;dat 120 ns 9 set-up time for stop condition tsu;sto 0.6 s sda s scl t low t r t hd;dat p t hd;sta t high t buf t f t su;dat t su;sta t su;sto t sp t hd;sta sr p
technical note 9/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. parameter symbol fast-mode devices unit min. max. 10 low level input voltage: vil -0.3 1 v 11 high level input voltage: vih 2.3 5 v 12 pulse width of spikes which must be suppressed by the input filter. tsp 0 50 ns 13 low level output voltage: at 3ma sink current vol1 0 0.4 v 14 input current each i/o pin with an input voltage between 0.4v and 4.5v. ii -10 10 a buf 4us hd;sta 2us hd;dat 1us low 3us high 1us su;dat 1us su;sto 2us scl clock frequency250khz scl sda
technical note 10/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. i 2 c bus format msb lsb msb lsb msb lsb s slave address a select address a data a p 1bit 8bit 1bit 8bit 1bit 8bit 1bit 1bit s = start conditions (recognition of start bit) slave address = recognition of slave address. 7 bits in upper o rder are voluntary. the least significant bit is l due to writing. a = acknowledge bit (recognition of acknowledgement) select address = select every of volume, bass and treble. data = data on every volume and tone. p = stop condition (recognition of stop bit) i 2 c bus interface protocol 1basic form s slave address a select address a data a p msb lsb msb lsb msb lsb 2automatic increment (select address increases (+1) according to the number of data. s slave address a select address a data1 a data2 a ???? datan a p msb lsb msb lsb msb lsb msb lsb msb lsb (example) data1 shall be set as data of address specified by select address. data2 shall be set as data of address specified by select address +1. datan shall be set as data of address specified by select address +n-1. 3configuration unavailable for transmission (in this case, only select address1 is set. s slave address a select address1 a data a select address 2 a data a p msb lsb msb lsb msb lsb msb lsb msb lsb noteif any data is transmitted as select address 2 next to data, it is recognized as data, not as select address 2. slave address msb lsb a6 a5 a4 a3 a2 a1 a0 r/w 1 0 0 0 0 0 0 0 80h
technical note 11/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. select address & data items select address (hex) msb data lsb d7 d6 d5 d4 d3 d2 d1 d0 initial setup 1 01 advanced switch on/off 0 advanced switch time of input gain/volume tone/fader/loudness 0 0 advanced switch time of mute initial setup 2 02 lpf phase level meter reset 0 0 0 subwoofer lpf fc lpf phase level meter reset initial setup 3 03 0 0 0 loudness fo 0 0 1 input selector 05 0 0 0 input selector input gain 06 mute on/off 0 0 input gain volume gain 20 volume gain / attenuation fader 1ch front 28 fader gain / attenuation fader 2ch front 29 fader gain / attenuation fader 1ch rear 2a fader gain / attenuation fader 2ch rear 2b fader gain / attenuation fader subwoofer 2c fader gain / attenuation bass setup 41 0 0 bass fo 0 0 bass q middle setup 44 0 0 middle fo 0 0 middle q treble setup 47 0 0 treble fo 0 0 0 treble q bass gain 51 bass boost/ cut 0 0 bass gain middle gain 54 middle boost/ cut 0 0 middle gain treble gain 57 treble boost/ cut 0 0 treble gain loudness gain 75 0 loudness hicut loudness gain system reset fe 1 0 0 0 0 0 0 1 advanced switch 0102030506 2028292a2b2c 414447 51545775
technical note 12/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. select address 01 (hex) time msb advanced switch time of mute lsb d7 d6 d5 d4 d3 d2 d1 d0 0.6msec advanced switch on/off 0 advanced switch time of input gain/volume tone/fader/loudness 0 0 0 0 1.0msec 0 1 1.4msec 1 0 3.2msec 1 1 time msb advanced switch time of input gain/vol ume/tone/fade r/loudness lsb d7 d6 d5 d4 d3 d2 d1 d0 4.7 msec advanced switch on/off 0 0 0 0 0 advanced switch time of mute 7.1 msec 0 1 11.2 msec 1 0 14.4 msec 1 1 mode msb advanced switch on/off lsb d7 d6 d5 d4 d3 d2 d1 d0 off 0 0 advanced switch time of input gain/volume tone/fader/loudness 0 0 advanced switch time of mute on 1 select address 02(hex) fc msb subwoofer lpf fc lsb d7 d6 d5 d4 d3 d2 d1 d0 off lpf phase level meter reset 0 0 0 0 0 0 55hz 0 0 1 85hz 0 1 0 120hz 0 1 1 160hz 1 0 0 prohibition other setting mode msb level meter reset lsb d7 d6 d5 d4 d3 d2 d1 d0 hold lpf phase 0 0 0 0 subwoofer lpf fc reset 1 phase msb lpf phase lsb d7 d6 d5 d4 d3 d2 d1 d0 0 0 level meter reset 0 0 0 subwoofer lpf fc 180 1 select address 03(hex) f0 msb loudness fo lsb d7 d6 d5 d4 d3 d2 d1 d0 250hz 0 0 0 0 0 0 0 1 400hz 0 1 800hz 1 0 prohibition 1 1 : initial condition
technical note 13/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. select address 05(hex) mode out f1/r1 out f2/r2 msb input selector lsb d7 d6 d5 d4 d3 d2 d1 d0 a a1 a2 0 0 0 0 0 0 0 1 b b1 b2 0 0 1 0 c diff cp1 cp2 0 1 1 0 d d1 d2 1 0 1 0 e e1 e2 1 0 1 1 input short 1 0 0 1 prohibition other setting input short the input impedance of each input terminal is lowered from 100k(typ) to 6 k(typ). (for quick charge of coupling capacitor) select address 06 (hex) gain msb input gain lsb d7 d6 d5 d4 d3 d2 d1 d0 0db mute on/off 0 0 0 0 0 0 0 1db 0 0 0 0 1 2db 0 0 0 1 0 3db 0 0 0 1 1 4db 0 0 1 0 0 5db 0 0 1 0 1 6db 0 0 1 1 0 7db 0 0 1 1 1 8db 0 1 0 0 0 9db 0 1 0 0 1 10db 0 1 0 1 0 11db 0 1 0 1 1 12db 0 1 1 0 0 13db 0 1 1 0 1 14db 0 1 1 1 0 15db 0 1 1 1 1 16db 1 0 0 0 0 17db 1 0 0 0 1 18db 1 0 0 1 0 19db 1 0 0 1 1 20db 1 0 1 0 0 prohibition 1 1 0 1 1 1 1 1 1 1 mode msb mute on/off lsb d7 d6 d5 d4 d3 d2 d1 d0 off 0 0 0 input gain on 1 : initial condition
technical note 14/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. select address 20, 28, 29, 2a, 2b, 2c (hex) gain & att msb vol, fader gain / attenuation lsb d7 d6 d5 d4 d3 d2 d1 d0 prohibition 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 0 0 0 0 15db 0 1 1 1 0 0 0 1 14db 0 1 1 1 0 0 1 0 13db 0 1 1 1 0 0 1 1 -77db 1 1 0 0 1 1 0 1 -78db 1 1 0 0 1 1 1 0 -79db 1 1 0 0 1 1 1 1 prohibition 1 1 0 1 0 0 0 0 1 1 1 1 1 1 1 0 -db 1 1 1 1 1 1 1 1 : initial condition
technical note 15/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. select address 41(hex) q factor msb bass q factor lsb d7 d6 d5 d4 d3 d2 d1 d0 0.5 0 0 bass fo 0 0 0 0 1.0 0 1 1.5 1 0 2.0 1 1 fo msb bass fo lsb d7 d6 d5 d4 d3 d2 d1 d0 60hz 0 0 0 0 0 0 bass q factor 80hz 0 1 100hz 1 0 120hz 1 1 select address 44(hex) q factor msb middle q factor lsb d7 d6 d5 d4 d3 d2 d1 d0 0.75 0 0 middle fo 0 0 0 0 1.0 0 1 1.25 1 0 1.5 1 1 fo msb middle fo lsb d7 d6 d5 d4 d3 d2 d1 d0 500hz 0 0 0 0 0 0 middle q factor 1khz 0 1 1.5khz 1 0 2.5khz 1 1 select address 47 (hex) q factor msb treble q factor lsb d7 d6 d5 d4 d3 d2 d1 d0 0.75 0 0 treble fo 0 0 0 0 1.25 1 fo msb treble fo lsb d7 d6 d5 d4 d3 d2 d1 d0 7.5khz 0 0 0 0 0 0 0 treble q factor 10khz 0 1 12.5khz 1 0 15khz 1 1 : initial condition
technical note 16/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. select address 51, 54, 57 (hex) gain msb bass/ middle/ treble gain lsb d7 d6 d5 d4 d3 d2 d1 d0 0db bass/ middle/ treble boost /cut 0 0 0 0 0 0 0 1db 0 0 0 0 1 2db 0 0 0 1 0 3db 0 0 0 1 1 4db 0 0 1 0 0 5db 0 0 1 0 1 6db 0 0 1 1 0 7db 0 0 1 1 1 8db 0 1 0 0 0 9db 0 1 0 0 1 10db 0 1 0 1 0 11db 0 1 0 1 1 12db 0 1 1 0 0 13db 0 1 1 0 1 14db 0 1 1 1 0 15db 0 1 1 1 1 16db 1 0 0 0 0 17db 1 0 0 0 1 18db 1 0 0 1 0 19db 1 0 0 1 1 20db 1 0 1 0 0 prohibition 1 0 1 0 1 1 1 1 1 0 1 1 1 1 1 mode msb bass/ middle/ treble boost/cut lsb d7 d6 d5 d4 d3 d2 d1 d0 boost 0 0 0 bass/middle/treble gain cut 1 : initial condition
technical note 17/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. select address 75 (hex) mode msb loudness hicut lsb d7 d6 d5 d4 d3 d2 d1 d0 hicut1 0 0 0 loudness gain hicut2 0 1 hicut3 1 0 hicut4 1 1 gain msb loudness gain lsb d7 d6 d5 d4 d3 d2 d1 d0 0db 0 loudness hicut 0 0 0 0 0 1db 0 0 0 0 1 2db 0 0 0 1 0 3db 0 0 0 1 1 4db 0 0 1 0 0 5db 0 0 1 0 1 6db 0 0 1 1 0 7db 0 0 1 1 1 8db 0 1 0 0 0 9db 0 1 0 0 1 10db 0 1 0 1 0 11db 0 1 0 1 1 12db 0 1 1 0 0 13db 0 1 1 0 1 14db 0 1 1 1 0 15db 0 1 1 1 1 16db 1 0 0 0 0 17db 1 0 0 0 1 18db 1 0 0 1 0 19db 1 0 0 1 1 20db 1 0 1 0 0 prohibition 1 0 1 0 1 1 1 1 1 1 : initial condition about power on reset at on of supply voltage circuit made initialization inside ic is built-in. please send data to all address as initial data at supply voltage on. and please supply mute at set side until this initial data is sent. item symbol limit unit condition min. typ. max. rise time of vcc trise 33 usec vcc rise time from 0v to 5v vcc voltage of release power on reset vpor 4.1 v about external compulsory mute terminal mute is possible forcibly than the outside after input again department, by the setting of the mute terminal. mute voltage condition mode gnd1.0v mute on 2.3vvcc mute off establish the voltage of mute in the condition to have been defined.
technical note 18/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. volume / fader volume attenuation of the details (db) d7 d6 d5 d4 d3 d2 d1 d0 (db) d7 d6 d5 d4 d3 d2 d1 d0 +15 0 1 1 1 0 0 0 1 -33 1 0 1 0 0 0 0 1 +14 0 1 1 1 0 0 1 0 -34 1 0 1 0 0 0 1 0 +13 0 1 1 1 0 0 1 1 -35 1 0 1 0 0 0 1 1 +12 0 1 1 1 0 1 0 0 -36 1 0 1 0 0 1 0 0 +11 0 1 1 1 0 1 0 1 -37 1 0 1 0 0 1 0 1 +10 0 1 1 1 0 1 1 0 -38 1 0 1 0 0 1 1 0 +9 0 1 1 1 0 1 1 1 -39 1 0 1 0 0 1 1 1 +8 0 1 1 1 1 0 0 0 -40 1 0 1 0 1 0 0 0 +7 0 1 1 1 1 0 0 1 -41 1 0 1 0 1 0 0 1 +6 0 1 1 1 1 0 1 0 -42 1 0 1 0 1 0 1 0 +5 0 1 1 1 1 0 1 1 -43 1 0 1 0 1 0 1 1 +4 0 1 1 1 1 1 0 0 -44 1 0 1 0 1 1 0 0 +3 0 1 1 1 1 1 0 1 -45 1 0 1 0 1 1 0 1 +2 0 1 1 1 1 1 1 0 -46 1 0 1 0 1 1 1 0 +1 0 1 1 1 1 1 1 1 -47 1 0 1 0 1 1 1 1 0 1 0 0 0 0 0 0 0 -48 1 0 1 1 0 0 0 0 -1 1 0 0 0 0 0 0 1 -49 1 0 1 1 0 0 0 1 -2 1 0 0 0 0 0 1 0 -50 1 0 1 1 0 0 1 0 -3 1 0 0 0 0 0 1 1 -51 1 0 1 1 0 0 1 1 -4 1 0 0 0 0 1 0 0 -52 1 0 1 1 0 1 0 0 -5 1 0 0 0 0 1 0 1 -53 1 0 1 1 0 1 0 1 -6 1 0 0 0 0 1 1 0 -54 1 0 1 1 0 1 1 0 -7 1 0 0 0 0 1 1 1 -55 1 0 1 1 0 1 1 1 -8 1 0 0 0 1 0 0 0 -56 1 0 1 1 1 0 0 0 -9 1 0 0 0 1 0 0 1 -57 1 0 1 1 1 0 0 1 -10 1 0 0 0 1 0 1 0 -58 1 0 1 1 1 0 1 0 -11 1 0 0 0 1 0 1 1 -59 1 0 1 1 1 0 1 1 -12 1 0 0 0 1 1 0 0 -60 1 0 1 1 1 1 0 0 -13 1 0 0 0 1 1 0 1 -61 1 0 1 1 1 1 0 1 -14 1 0 0 0 1 1 1 0 -62 1 0 1 1 1 1 1 0 -15 1 0 0 0 1 1 1 1 -63 1 0 1 1 1 1 1 1 -16 1 0 0 1 0 0 0 0 -64 1 1 0 0 0 0 0 0 -17 1 0 0 1 0 0 0 1 -65 1 1 0 0 0 0 0 1 -18 1 0 0 1 0 0 1 0 -66 1 1 0 0 0 0 1 0 -19 1 0 0 1 0 0 1 1 -67 1 1 0 0 0 0 1 1 -20 1 0 0 1 0 1 0 0 -68 1 1 0 0 0 1 0 0 -21 1 0 0 1 0 1 0 1 -69 1 1 0 0 0 1 0 1 -22 1 0 0 1 0 1 1 0 -70 1 1 0 0 0 1 1 0 -23 1 0 0 1 0 1 1 1 -71 1 1 0 0 0 1 1 1 -24 1 0 0 1 1 0 0 0 -72 1 1 0 0 1 0 0 0 -25 1 0 0 1 1 0 0 1 -73 1 1 0 0 1 0 0 1 -26 1 0 0 1 1 0 1 0 -74 1 1 0 0 1 0 1 0 -27 1 0 0 1 1 0 1 1 -75 1 1 0 0 1 0 1 1 -28 1 0 0 1 1 1 0 0 -76 1 1 0 0 1 1 0 0 -29 1 0 0 1 1 1 0 1 -77 1 1 0 0 1 1 0 1 -30 1 0 0 1 1 1 1 0 -78 1 1 0 0 1 1 1 0 -31 1 0 0 1 1 1 1 1 -79 1 1 0 0 1 1 1 1 -32 1 0 1 0 0 0 0 0 - 1 1 1 1 1 1 1 1
technical note 19/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. about level meter the operation of circuit level meter is a function which gives dc voltage proportional to the size of signal of sound. it detects the peak level of signal and keeps the peak level, so that it is possible to monitor the size of signal by resetting dc voltage kept with suitable interval. the way to reset level meter output please send reset data through i 2 c bus when reset output of level metersend d6 = 1 of select address 02(hex). when cancel of output reset of level meter (hold) send d6 = 0 of select address 02(hex). the settings about period of reset peak hold operation will start after hold data is transmitted. set the wait time after hold data transmission according to the frequency bandwidth detected. wait time must be set to a minimum of one cycle over the detected frequency bandwidth. ex) detected frequency bandwidth is above 40hz, 40hz = 25ms = wait time transmission example by i 2 c bus
technical note 20/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. application circuit fig.25 application circuit diagram notes on wiring please connect the decoupling capacitor of a power supply in the shortest distance as much as possible to gnd. lines of gnd shall be one-point connected. wiring pattern of digital shall be away from that of analog unit and cross-talk shall not be acceptable. lines of scl and sda of i 2 c bus shall not be parallel if possible. the lines shall be shielded, if they are adjacent to each other. lines of analog input shall not be parallel if possible. the lines shall be shielded, if they are adjacent to each other. gnd sda scl mute 10 0.1 10 outf1 outf2 outr1 outr2 outs1 outs2 single1 single2 gnd isolation vcc 10 10 10 10 10 2.2 2.2 2.2 2.2 2.2 10 2.2 1 1 1 1 lout gnd vcc/2 volume/mute 3 band p-eq (tone control) loudness fader fader fader fader fader lpf input gain gnd iso amp input selector (4 single-end and 1 stereo iso) 14 100k 100k 100k 100k 250k gnd iso amp 250k 250k 250k 250k 250k 250k level meter vcc i 2 c bus logic fader gain:+15db-79b/1db step no pop noise lpf fc=55/85/120/160hz loudness gain:20db0b/1b step no pop noise ?0=250/400/800hz ?hicut:1/2/3/4 3 band p-eq (tone control) gain+20db-20db/1db step no pop noise ?bassf0=60/80/100/120hz q=0.5/1.0/1.5/2.0 ?meddle:f0=500/1k/1.5k/2.5khz q=0.75/1/1.25/1.5 ?treblef0=7.5k/10k/12.5k/15khz q=0.75/1.25 volume gain+15db-79db/1db step no pop noise input gain gain+20db0db/1db step no pop noise 1 2 3 4 5 6 7 8 9 10 11 12 13 24 23 22 21 20 19 18 17 16 15 10 single3 single4
technical note 21/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. interfaces terminal no. terminal name terminal voltage equivalent circuit terminal description 2 3 4 5 a1 a2 b1 b2 4.25 a terminal for signal input. the input impedance is 100k(typ). 6 7 8 9 10 11 12 cp1 cn cp2 d1 d2 e1 e2 4.25 a terminal for signal input. the input impedance is 250k(typ). 13 mute a terminal for external compulsory mute. if terminal voltage is high level, the mute is off. and if the terminal voltage is low level, the mute is on. 16 17 18 19 20 outs1 outr2 outr1 outf2 outf1 4.25 a terminal for fader and subwoofer output. vcc gnd 1.65v gnd vcc 100k gnd vcc 250k v cc gnd
technical note 22/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. terminal no. terminal name terminal voltage equivalent circuit terminal description 21 vcc 8.5 power supply terminal. 22 scl a terminal for clock input of i 2 c bus communication. 23 sda a terminal for data input of i 2 c bus communication. 24 gnd 0 ground terminal. 1 fil 4.25 voltage for reference bias of analog signal system. the simple precharge circuit and simple discharge circuit for an external capacitor are built in. vcc gnd 1.65v vcc gnd 1.65v
technical note 23/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. notes for use 1. absolute maximum rating voltage when it impressed the voltage on vcc more than the absolute maximum rating voltage, circuit currents increase rapidly, and there is absolutely a case to reach characteristic deterioration and destruction of a device. in particular in a serge examination of a set, when it is expected the impressing serge at vcc terminal (21pin), please do not impress the large and over the absolute maximum rating voltage (including a operating voltage + serge ingredient (around 14v)). 2. about a signal input part 1) about constant set up of input coupling capacitor in the signal input terminal, the constant setting of input coupling capacitor c(f) be sufficient input impedance r in () inside ic and please decide. the first hpf characteristic of rc is composed. 2) about the input selector short short mode is the command which makes switch s sh =on an input selector part and input impedance rin of all terminals, and makes resistance small. switch s sh is off when not choosing a short command. a constant time becomes small at the time of this command twisting to the resistance inside the capacitor connected outside and lsi. the charge time of a capacitor becomes short. since short mode turns on the switch of s sh and makes it low impedance, please use it at the time of a non-signal. 3. about mute terminal(13pin) when power supply is off any voltage shall not be supplied to mute terminal (13pin) when power-supply is off. please insert a resistor (about 2.2k) to mute terminal in series, if voltage is supplied to mute terminal in case. (please refer application circuit diagram.) 2 in) 2 in (2fcr1 )(2fcr a(f) ? ? ?
technical note 24/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. thermal derating curve ssop-a24 1.5 1.0 0.5 0.0 0 25 50 75 100 125 150 1.0w ambient temperature ta power dissipation pdw measurement condition: rohm standard board board size70701.6(?) materiala fr4 grass epoxy board (3% or less of copper foil area)
technical note 25/25 bd37524fs www.rohm.com 2010.03 - rev.a ? 2010 rohm co., ltd. all rights reserved. ordering part number ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2000pcs e2 () direction of feed reel 1pin (unit : mm) ssop-a24 24 0.10.1 12 0.8 ?4 +6 0.17 ?0.05 +0.1 13 1.80.1 4 0.380.1 1 10 0.2 0.5 0.2 1.2 0.15 7.8 0.3 5.4 0.2 (max 10.35 include burr) 0.1
r1010 a www.rohm.com ? 2010 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specied herein is subject to change for improvement without notice. the content specied herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specied in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specied herein is intended only to show the typical functions of and examples of application circuits for the products. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, re or any other damage caused in the event of the failure of any product, such as derating, redunda ncy, re control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospac e machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specied herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.

▲Up To Search▲

Price & Availability of BD37524FS-E2

	To Download BD37524FS-E2 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .