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product structure silicon monolithic integrated circuit this product has no designed protection against radioactive rays 1/ 26 tsz02201 - 0c2c0e100430 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. tsz22111 ? 14 ? 001 www.rohm.com 16.dec.2015 rev.001 sound processor with built - in 2 - band equalizer BD37513FS general description BD37513FS is a sound processor with built - in 2 - band equalizer for car audio. the functions are 4ch stereo input selector, input - gain c ontrol, main volume, loudness, and 4 ch fad er volume. moreover, its advanced switch circuit, which is an original rohm technology, can reduce various switching noise (ex. no - signal, low frequency like 20hz & large signal inputs). advanced switch makes control of microcomputer easier, supporting the construct ion of a high quality car audio system. features ? reduce switching noise of input gain control, mute, main volume, fader volume, bass, treble, loudness by using advanced switch circuit . ? built - in 1 differential input selector and 3 single -en ded input selectors ? built - in ground isolation amplifier inputs, ideal for external stereo input. ? built - in input gain controller reduces switching noise for volume of a portable audio input. ? decrease the number of external components due to built - in 2 - band equalizer filter and loudness filter . also , it is possible to control gv using i 2 c bus control. ? it is possible to adjust the gain of the bass and treble up to 20db with 1 db step gain adjustment. ? energy - saving design resulting in l ow current consumption, by utilizing the bi - cmos process . it has the advantage in quality over scaling down the power heat control of the internal regulators. ? input terminals and output terminals are organized and separately laid out to keep the signal flow in one direction whi ch results in simpler and smaller pcb layout. ? it is possible to control the i 2 c bus by 3.3v/5v. key specifications ? power supply voltage range : 7.0v to 9.5v ? circuit current ( no signal ): 38ma( typ ) ? total harmonic distortion 1 : 0.001%( typ ) ? maximum i nput voltage : 2.3vrms( typ ) ? cross - talk between selectors : - 100db( typ ) ? volume control range : +15db to - 79db ? output noise voltage 1 : 3.8vrms( typ ) ? residual output noise voltage : 1.8vrms( typ ) ? operating temperature range : -40 c to +85 c package w (typ) x d(typ) x h(max) applications it is optimal for use in car audio systems . it can also be use d for audio equipment of mini compo, micro compo, tv , etc. ssop - a20 8.70mm x 7.80 mm x 2.01mm datashee t datashee t
BD37513FS 2 / 26 tsz02201 - 0c2c0e100430 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 typical application circuit pin configuration pin description s pin no. pin name description pin no. pin name description 1 fil vcc/2 terminal 11 mute external compulsory mute terminal 2 a1 a input terminal of 1ch 12 test1 test pin 3 a2 a input terminal of 2ch 13 outr2 rear output terminal of 2ch 4 b1 b input terminal of 1ch 14 outr1 rear output terminal of 1ch 5 b2 b input terminal of 2ch 15 outf2 front output terminal of 2ch 6 c1 c input terminal of 1ch 16 outf1 front output terminal of 1ch 7 c2 c inp ut terminal of 2ch 17 vcc power supply terminal 8 dp1 d positive input terminal of 1ch 18 scl i 2 c communication clock terminal 9 dn d negative input terminal 19 sda i 2 c communication data terminal 10 dp2 d positive input terminal of 2ch 20 gnd gnd termi nal unit 5 > @ c : [f] BD37513FS top view fil 1 a1 2 a2 3 b1 4 b2 5 c1 6 c2 7 dp1 8 dn 9 dp2 10 11 mute 12 test 1 13 outr 2 14 outr 1 15 outf2 16 outf1 17 vcc 18 scl 19 sda 20 gnd BD37513FS 3 / 26 tsz02201 - 0c2c0e100430 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 block diagram gain: 0db to - 79db/1db step 20db to 0db/ 1d b step gain:+20d b to - 20 db/1db gain+15d b to - 79d b/1db step gain:+20d b to 0db/1 db step gnd iso amp input selector ( 3 single - end and 1 stereo iso ) volume / mute 2 band eq ( tone control ) loudness i 2 c bus logic gnd 100 k vcc / 2 input gain 20 19 18 17 16 15 14 13 12 11 f a d e r 1 2 3 4 5 6 7 8 9 10 100 k 100 k 100 k 250 k 250 k 250 k 250 k gnd iso amp 250 k f a d e r f a d e r f a d e r vcc fader gain : 0 db - 79 b / 1 db step loudness 20 db 0 b / 1 b step ? 0 = 800 ? hicut 1 / 2 / 3 / 4 2 band eq ( tone control ) gain + 20 db - 20 db / 1 db ? bass f 0 = 100 hz , q = 1 . 0 ? treble f 0 = 10 khz q = 1 . 25 volume gain :+ 15 db - 79 db / 1 db step input gain gain :+ 20 db 0 db / 1 db step BD37513FS 4 / 26 tsz02201 - 0c2c0e100430 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 absolute maximum ratings (ta=25 c ) (note) this value derates by 7.5mw/ c for ta=25 c or more when rohm standard board is used. thermal res l v w d q f h m d .3 ( c /w) rohm standard board size : 70 x 70 x 1.6( mm 3 ) material : a fr4 grass epoxy board(3% or less of copper foil area) caution : operating the ic over the absolute maximum ratings may damage the ic. the damage can either be a short circu it between pins or an open circuit between pins and the internal circuitry. therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the ic is operated over the absolute maximum ratings . recommended operating cond ition s parameter symbol min typ max unit power supply voltage v cc 7.0 - 9.5 v temperature topr - 40 - +85 v electrical characteristics (unless specified otherwise , ta=25 c , v cc =8.5v, f=1khz, v in 9 u p v 5 j 5 l n $ l q s x w , q s x w j d l q g % mute off , volume 0db, tone control 0db, loudness 0db, fader 0db) block parameter symbol limit unit conditions min typ max general circuit current i q BD37513FS 5 / 26 tsz02201 - 0c2c0e100430 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 electrical characteristics - continued (unless specified otherwise , ta=25 c , v cc =8.5v, f=1khz, v in 9 u p v 5 j 5 l n $ l q s x w , q s x w j d l q g % mute off , volume 0db, tone control 0db, loudness 0db, fader 0db) block parameter symbol limit unit conditions min typ max mute mute attenuation BD37513FS 6 / 26 tsz02201 - 0c2c0e100430 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 thd+n [%] output voltage : v out [vrms] 10khz 1khz 100hz typical performance curves frequency [hz] gain [db] bass gain : - 20db to +20db /1db step fo : 60hz q : 0.5 figure 2 . total harmonic distortion vs output voltage figure 3 . gain v s freq uency figure 4 . bass gai n vs freq uency figure 1 . quiescent current vs su pply voltage supply voltage : v cc [v] quiescent cur rent : i q [ma] v in [vrms] gain [db] frequency [hz] - 5 - 4 - 3 - 2 - 1 0 1 2 3 4 5 10 100 1k 10k 100k frequency (hz) gain (db) gain=0db 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 vout - 25 - 20 - 15 - 10 - 5 0 5 10 15 20 25 10 100 1k 10k 100k 0 10 20 30 40 50 0 2 4 6 8 10 vcc[v] iq[ma] BD37513FS 7 / 26 tsz02201 - 0c2c0e100430 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 typical performance curves - continued treble gain [db] figure 7 . output noise vs bass gain bass gain [db] output noise [ vrms] figure 8 . output noise vs treble gain output noise [ vrms] figure 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 treble gain [db] j?R [uvrms] din-audio ihf-a - 25 - 20 - 15 - 10 - 5 0 5 10 15 20 25 10 1k 100k gain (db) frequency (hz) 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 BD37513FS 8 / 26 tsz02201 - 0c2c0e100430 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 typical performance curve s - continued figure 11 . advanced switch 1 figure 12 . advanced switch 2 figure 9 . cmrr vs fr eq uency gain [db] frequency [h z ] figure 10 . o utput voltage vs r load output voltage : v out [vrms] r load [ohm] 0.0 0.5 1.0 1.5 2.0 2.5 100 1000 10000 100000 ?[ohm] [vrms] -70 -60 -50 -40 -30 -20 -10 0 10 100 1k 10k 100k frequency (hz) gain (db) BD37513FS 9 / 26 tsz02201 - 0c2c0e100430 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 timing chart control signal specification (1) electrical specifications and timing for bus lines and i/o stage fig ure 13 . i 2 c - bus signal timing diagram ta ble 1 characteristics of the sda and scl bus lines for i 2 c - bus devices parameter symbol fast - mode i 2 c - bus unit min max 1 scl clock frequency f scl 0 400 khz 2 bus free time between a stop and start condition t buf 1.3 buf 4 us hd ; sta 2 us hd ; dat 1 us low 3 us high 1 us su ; dat 1 us su ; sto 2 us scl clock frequency 250 khz scl sda 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;stat t su;stot t sp t hd;stat sr p BD37513FS 10 / 26 tsz02201 - 0c2c0e100430 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 (2) 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 condition (recognition of start bit) slave address = recognition of slave address. the first 7 bits correspond to the slave address . the least significant bit is 3 l which corresponds to write mode . a = acknowledge bit (recognition of acknowledgement) select address = select address corresponding to volume, bass or treble. data = data on every volume and tone. p = stop condition (recognition of stop bit) (3) i 2 c bus interface protocol (a) basic form at s slav e address a select address a data a p msb lsb msb lsb msb lsb (b) automatic increment (select address increases (+1) according to the number of data. ) s slave address a select address a data1 a data2 a ???? msb lsb msb lsb msb lsb msb lsb ( example ) q data1 shall be set as data of address specified by select address. r data2 shall be set as data of address specified by select address +1. s datan shall be set as data of address speci fied by select address +n - 1. (c) configuration 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 l sb msb lsb BD37513FS 11 / 26 tsz02201 - 0c2c0e100430 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 (5) 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 0 0 0 0 0 0 0 0 initial setup 3 03 0 0 0 1 0 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 attenuation fader 2ch front 29 fader attenuation fader 1ch rear 2a fader attenuation fader 2ch rear 2b fader attenuation test mode 1 2c 1 1 1 1 1 1 1 1 test mode 2 41 0 0 1 0 0 0 0 1 test mode 3 44 0 0 0 0 0 0 0 0 test mode 4 47 0 0 0 1 0 0 0 1 bass gain 51 bass boost/ cut 0 0 bass gain test mode 5 54 1 0 0 0 0 0 0 0 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 note 1. the advanced switch works in the latch part while changing from one function to another. 2. upon continuous data transfer, the select address rolls over because of the automatic increment function, as shown below. 3. for the function of i nput s elector etc, a dvanced s witch is not used . therefore, please apply mute on the set side w hen chang ing these setting s . 4. when using mute function of this ic at the time of changing input selector, please switch mute on/off while waiting for advanced - mute time. 41 44 47 51 54 57 7 5 01 02 03 05 06 20 28 29 2a 2b 2c BD37513FS 12 / 26 tsz02201 - 0c2c0e100430 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 sele ct address 01 (hex) time msb advanced switch time of mute lsb d7 d6 d5 d4 d3 d 2 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/volume/tone/fader/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/vo lume tone/fader/loudness 0 0 advanced switch time of mute on 1 select address 05(hex) mode msb input selector lsb d7 d6 d5 d4 d3 d2 d1 d0 initial 0 0 0 0 0 0 0 0 a 0 0 0 1 b 0 0 1 0 c 0 0 1 1 d diff 0 1 1 1 input short 1 0 0 1 prohibition other setting input short : 7 k h l q s x w l p s h g d q f h r i h d f k l q s x w w h u p l q d o l v o r z h u h g i u r p n 7 < |