BD37524FS_1003

Sound Processor Series for Car Audio Sound Processor with Built-in 3-band Equalizer BD37524FS No.10085EAT05 ●Description BD37524FS is sound processors built-in 3-band equalizer for 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 various switching noise (ex. No-signal, low frequency likes 20Hz & large signal inputs). “Advanced switch” makes control of microcomputer 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 selector and 4 single-ended input selectors 3) Built-in ground isolation amplifier inputs, ideal for external stereo input. 4) Built-in input gain controller reduces switching 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. 2 And, possible to control Q, Gv, fo of 3-band equalizer and fc of LPF, fo, Gv of loudness by I C BUS control freely 6) It is possible for the bass, middle, and treble to the gain adjustment quantity of ±20dB 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. 2 10) It is possible to control by 3.3V / 5V for I 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. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1/25 2010.03 - Rev.A BD37524FS ●Line up matrix Function Input selector Input gain Mute Volume Specifications ・Stereo 4 input ・Differential 1 input ・0～20dB（1dB step） ・Possible to use “Advanced switch” for prevention of switching noise. ・Possible to use “Advanced switch” for prevention of switching noise. ・+15dB～-79dB（1dB step）, -∞ ・Possible to use “Advanced switch” for prevention of switching noise. ・-20～+20dB（1dB step） ・Q=0.5, 1, 1.5, 2 variable ・fo=60, 80, 100, 120Hz ・Possible to use “Advanced switch” at changing gain ・-20～+20dB（1dB step） ・Q=0.75, 1, 1.25, 1.5 variable ・fo=500, 1k, 1.5k, 2.5kHz variable ・Possible to use “Advanced switch” at changing gain ・-20～+20dB（1dB step） ・Q=0.75, 1.25 variable ・fo=7.5k, 10k, 12.5k, 15kHz variable ・Possible to use “Advanced switch” at changing gain ・+15dB～-79dB(1dB step), -∞dB ・Possible to use “Advanced switch” for prevention of switching noise. ・0dB～20dB(1dB step) ・fo=250/400/800Hz ・Possible to use “Advanced switch” for prevention of switching noise. ・fc=55/85/120/160Hz, pass ・Phase shift (0°/180°) ・I2C BUS control ・DC Output Technical Note Bass Middle Treble Fader Loudness LPF Level meter ●Absolute maximum ratings (Ta=25℃) Item Power supply Voltage Input voltage Power Dissipation Storage Temperature Symbol VCC Vin Pd Tastg Rating 10.0 VCC+0.3～GND-0.3 1000 ※1 -55～+150 Unit V V mW ℃ ※This value decreases 8mW/℃ for Ta=25℃ or more. ROHM standard board shall be mounted. Thermal resistance θja = 125(℃/W) ROHM Standard board Size：70×70×1.6(㎣) Material：A FR4 grass epoxy board(3% or less of copper foil area) ●Operating conditions Item Power supply Voltage Temperature Symbol VCC Topr MIN 7.0 -40 TYP － － MAX 9.5 +85 Unit V ℃ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 2/25 2010.03 - Rev.A BD37524FS Technical Note BLOCK ●Electrical characteristics (Unless specified particularly, Ta=25℃, VCC=8.5V, f=1kHz, Vin=1Vrms, Rg=600Ω, RL=10kΩ, A1 input, Input gain 0dB, Mute off, Volume 0dB, Tone control 0dB, Loudness 0dB, LPF OFF, Fader 0dB) Limit Item Symbol Unit Condition Min. Typ. Max. Current upon no signal Voltage gain Channel balance Total harmonic distortion 1 (FRONT,REAR) Total harmonic distortion 2 (SUBWOOFER) Output noise voltage 1 (FRONT,REAR)＊ Output noise voltage 2 (SUBWOOFER)＊ Residual output noise voltage＊ Cross-talk between channels＊ IQ GV CB THD+N1 THD+N2 VNO1 VNO2 VNOR － -1.5 -1.5 － － － － － 38 0 0 0.001 0.002 3.8 4.8 1.8 48 1.5 1.5 0.05 0.05 15 15 10 mA dB dB ％ ％ μVrms μVrms μVrms No signal Gv=20log(VOUT/VIN) CB = GV1-GV2 VOUT=1Vrms BW=400-30KHz VOUT=1Vrms BW=400-30KHz Rg = 0Ω BW = IHF-A Rg = 0Ω BW = IHF-A Fader = -∞dB Rg = 0Ω BW = IHF-A Rg = 0Ω CTC=20log(VOUT/VIN) BW = IHF-A f=1kHz VRR=100mVrms RR=20log(VCC IN/VOUT) GENERAL CTC － -100 -90 dB Ripple rejection Input impedance(A, B) Input impedance (C,D,E) INPUT SELECTOR Maximum input voltage Cross-talk between selectors＊ RR RIN_S RIN_D VIM CTS － 70 175 2.1 － -70 100 250 2.3 -100 -40 130 325 － -90 dB kΩ kΩ Vrms dB Common mode rejection ratio＊ CMRR 50 65 － dB INPUT GAIN Minimum input gain GIN MIN -2 0 +2 dB Maximum input gain Gain set error GIN MAX GIN ERR GMUTE GV MAX GV MIN GV ERR1 GV ERR2 GV ERR3 18 -2 － 20 0 -105 22 +2 -85 dB dB dB Mute attenuation＊ Maximum gain VOLUME Maximum attenuation＊ Attenuation set error 1 Attenuation set error 2 Attenuation set error 3 13 － -2 -3 -4 15 17 dB -100 0 0 0 -85 2 3 4 dB dB dB dB VIM at THD+N(VOUT)=1％ BW=400-30KHz Rg = 0Ω CTS=20log(VOUT/VIN) BW = IHF-A CP1 and CN input CP2 and CN input CMRR=20log(VIN/VOUT) BW = IHF-A Input gain 0dB VIN=100mVrms Gin=20log(VOUT/VIN) Input gain 20dB VIN=100mVrms Gin=20log(VOUT/VIN) GAIN=+20～+1dB Mute ON Gmute=20log(VOUT/VIN) BW = IHF-A Volume = 15dB VIN=100mVrms Gv=20log(VOUT/VIN) Volume = -∞dB Gv=20log(VOUT/VIN) BW = IHF-A GAIN & ATT=+15dB～-15dB ATT=-16dB～-47dB ATT=-48dB～-79dB www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. MUTE 3/25 2010.03 - Rev.A BD37524FS Technical Note BLOCK Item Maximum boost gain Symbol GB BST Limit Min. 18 Typ. 20 Max. 22 Unit dB Condition Gain=+20dB f=100Hz VIN=100mVrms GB=20log (VOUT/VIN) Gain=-20dB f=100Hz VIN=2Vrms GB=20log (VOUT/VIN) Gain=-20～+20dB f=100Hz Gain=+20dB f=1kHz VIN=100mVrms GM=20log (VOUT/VIN) Gain=-20dB f=1kHz VIN=2Vrms GM=20log (VOUT/VIN) Gain=-20～+20dB f=1kHz Gain=+20dB f=10kHz VIN=100mVrms GT=20log (VOUT/VIN) Gain=-20dB f=10kHz VIN=2Vrms GT=20log (VOUT/VIN) Gain=-20～+20dB f=10kHz Fader=15dB VIN=100mVrms GF=20log(VOUT/VIN) Fader = -∞dB GF=20log(VOUT/VIN) BW = IHF-A Gain=+1～+15dB ATT=-1～-15dB ATT=-16～-47dB ATT=-48～-79dB VIN=100mVrms THD+N=1％ BW=400-30KHz Gain 20dB VIN=100mVrms GL=20log(VOUT/VIN) GAIN=+20～+1dB BASS Maximum cut gain Gain set error Maximum boost gain GB CUT GB ERR GM BST -22 -2 18 -20 0 20 -18 2 22 dB dB dB MIDDLE Maximum cut gain Gain set error Maximum boost gain GM CUT GM ERR GT BST -22 -2 17 -20 0 20 -18 2 23 dB dB dB TREBLE Maximum cut gain Gain set error Maximum boost gain GT CUT GT ERR GF BST -23 -2 13 -20 0 15 -17 2 17 dB dB dB FADER / SUBWOOFER Maximum attenuation＊ Gain set error Attenuation set error 1 Attenuation set error 2 Attenuation set error 3 Output impedance Maximum output voltage GF MIN GF ERR GF ERR1 GF ERR2 GF ERR3 ROUT VOM GL MAX GL ERR VL MAX VL OFF － -2 -2 -3 -4 2 -100 0 0 0 0 － 2.2 -90 2 2 3 4 50 － dB dB dB dB dB Ω Vrms LOUDNESS Maximum gain Gain set error Maximum output voltage Output offset voltage 17 -2 2.8 － 20 0 3.1 0 23 2 3.5 100 dB dB V mV Level meter VP-9690A(Average value detection, effective value display) filter by Matsushita Communication is used for ＊ measurement. Phase between input / output is same. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 4/25 2010.03 - Rev.A BD37524FS ●Electrical characteristic curves (Reference data) Technical Note 50 40 T D (% H +N 1 0 1 0 .1 01 .0 00 .0 1 00 .0 1 1 0 1 Vin[Vrms] Vu o Gain[dB] G in(d a B 5 4 3 2 1 0 -11 0 -2 -3 -4 -5 Frequency [Hz] Gain=0dB 10kHz 1kHz 100Hz Iq[mA] THD+N[%] 30 20 10 0 0 2 4 6 8 10 VCC[V] 0 .1 01 .0 00 .0 1 1 0 10 0 1 k 1k 0 10 0k 01 .0 0 .1 1 Vout [Vrms] Fig.1 Iq vs Vcc 2 5 2 0 1 5 1 0 5 0 -5 -1 0 -1 5 -2 0 -2 5 1 0 Fig.2 Thd(V) Vo V u vs ot 2 5 2 0 1 5 1 0 5 0 -5 -1 0 -1 5 -2 0 -2 5 1 0 Fig.3Freque vs Freq Gain vs Freq Fig.12 Gainncy(Hz) 2 5 2 0 1 5 1 0 5 0 -5 -1 0 -1 5 -2 0 -2 5 1 0 BASS GAIN : -20～+20dB /1dB step fo : 60Hz Q : 0.5 fo : 60/80/100/120Hz BASS GAIN : ±20dB Q : 0.5 Q : 0.5/1/1.5/2 BASS GAIN : ±20dB fo : 60Hz Gain[dB] Gain[dB] 10 0 1 k 1k 0 Frequency [Hz] 10 0k Gain[dB] 10 0 1 k 1k 0 Frequency [Hz] 10 0k 10 0 1 k 1k 0 Frequency [Hz] 10 0k Fig.4 Bass Gain vs Freq Fig.5 Bass fo vs Freq Fig.6 Bass Q vs Freq 2 5 2 0 1 5 1 0 5 0 -5 -1 0 -1 5 -2 0 -2 5 1 0 MIDDLE GAIN : -20～+20dB /1dB step 2 5 2 0 1 5 1 0 5 0 -5 -1 0 -1 5 -2 0 -2 5 1 0 fo : 500/1k/1.5k/2.5kHz fo : 500Hz Q : 0.75 25 20 15 10 5 0 -5 -10 -15 -20 -25 10 100 1k Q : 0.75/1/1.25/1.5 Gain[dB] Gain[dB] Gain[dB] MIDDLE GAIN : ±20dB fo : 1kHz 10 0 1 k 1k 0 Frequency [Hz] 10 0k 10 0 1 k 1k 0 10 0k 10k 100k Frequency [Hz] Frequency [Hz] Fig.7 Middle Gain vs Freq 25 20 15 10 5 0 -5 -10 -15 -20 - 25 25 TREBLE GAIN:-20～+20dB /1dB step fo : 7.5kHz Q : 0.75 Fig.8 Middle fo vs Freq 25 20 15 10 5 0 -5 -10 -15 -20 - 25 Fig.9 Middle Q vs Freq 20 15 10 5 0 -5 -10 -15 -20 - 25 10 fo : 7.5k/10k/12.5k/15kHz TREBLE GAIN : ±20dB Q : 0.75 Q : 0.75/1.25 TREBLE GAIN : ±20dB fo : 7.5kHz Gain[dB] Gain (dB) Output Noise[uVrm 10 100 1k 10k 100k Gain[dB] Gain (dB) 100 1k 10k 100k 10 100 1k 10k 100k Frequency [Hz] Frequency (Hz) Frequency [Hz] Fig.10 Treble Gain vs Freq Fig.11 Treble fo vs Freq Fig.12 Treble Q vs Freq Frequency [Hz] Frequency (Hz) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 5/25 2010.03 - Rev.A BD37524FS Technical Note 1000 出力雑音電圧[uVrms] Output Noise[uVrms] Din-Audio 100 IHF-A Output Noise[uVrms] 1000 出力雑音電圧 [uVrms] DIN-Audio 100 IHF-A 出力雑音電圧 [uVrms] 1000 DIN-Audio 100 IHF-A 10 10 10 1 -80 -70 -60 -50 -40 -30 -20 -10 0 10 20 1 Volume Gain[dB] -20 -15 -10 -5 0 5 10 15 20 1 -20 -15 -10 -5 0 5 10 15 20 Middle Gain [dB] Bass Gain [dB] Fig.13 Volume Gain vs Noise Fig.14 Bass Gain vs Noise Fig.15 Middle Gain vs Noise 1000 Output Noise[uVrms] 出力雑音電圧 [uVrms] 0 DIN-Audio IHF-A 2.5 最大出力[Vrms] 2.0 1.5 1.0 0.5 0.0 10 0 1 k 1k 0 10 0k -1 0 G Gain[dB] ain (dB -2 0 -3 0 -4 0 -5 0 -6 0 100 10 1 -20 -15 -10 -5 0 5 10 15 20 Treble Gain [dB] -7 0 1 0 Vo [Vrms] 100 Frequency [Hz] 1000 10000 Rload [ohm] 出力負荷[ohm] 100000 Fig.16 Treble Gain vs Noise Fig.17 CMRR vs Freq 3.5 3 2.5 2 Fre e cy(Hz) qu n Fig.18 Rload vs Vo Vout[V] 1.5 1 0.5 0 0 0.5 1 Vin [Vrms] 1.5 2 2.5 3 Fig.19 Advanced Switch 1 Fig.20 Advanced Switch 2 Fig.21 Level Meter Vin vs Vo www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 6/25 2010.03 - Rev.A BD37524FS ●Block diagram and pin configuration 24 23 22 21 VCC Technical Note 20 19 18 17 16 15 14 13 G ND I2C BUS LOGIC ■Fader Gain:+15dB～-79ｄB/1dB step ★no pop noise ■LPF fc=55/85/120/160Hz ■Loudness Gain:20dB～0ｄB/1ｄB step ★no pop noise ・ｆ0=250/400/800Hz ・Hicut:1/2/3/4 ■3 Band P-EQ (Tone control) Gain：+20dB～-20dB/1dB step ★no pop noise ・Bass：f0=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 ・Treble：f0=7.5k/10k/12.5k/15kHz Q=0.75/1.25 ■Volume Gain：+15dB～-79dB/1dB step ★no pop noise ■Input Gain Gain：+20dB～0dB/1dB step ★no pop noise Input selector (4 single-end and 1 stereo ISO) GND ISO amp VCC/2 100k 1 2 3 100k 4 100k 5 100k 6 250k 7 250k 8 250k 9 250k 10 250k 11 250k 12 250k Fader★ ★Loudness ★3 Band P-EQ (Tone control) ★Volume/Mute Level meter ★Input Gain Fig.22 BD37524FS Descriptions of terminal Terminal Terminal Description No. Name 1 FIL VCC/2 terminal 2 3 4 5 6 7 8 9 10 11 12 A1 A2 B1 B2 CP1 CN CP2 D1 D2 E1 E2 A input terminal of 1ch A input terminal of 2ch B input terminal of 1ch B input terminal of 2ch C positive input terminal of 1ch C negative input terminal C positive input terminal of 2ch D input terminal of 1ch D input terminal of 2ch E input terminal of 1ch E input terminal of 2ch Terminal No. 13 14 15 16 17 18 19 20 21 22 23 24 Terminal Name MUTE LOUT OUTS2 OUTS1 OUTR2 OUTR1 OUTF2 OUTF1 VCC SCL SDA GND Description External compulsory mute terminal Output terminal for Level meter Subwoofer output terminal of 2ch Subwoofer output terminal of 1ch Rear output terminal of 2ch Rear output terminal of 1ch Front output terminal of 2ch Front output terminal of 1ch Power supply terminal I2C Communication clock terminal I2C Communication data terminal GND terminal Fader★ Fader★ GND ISO amp Fader★ LPF Fader★ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 7/25 2010.03 - Rev.A BD37524FS ●Timming Chart CONTROL SIGNAL SPECIFICATION (１) Electrical specifications and timing for bus lines and I/O stages Technical Note SDA t BUF t t LOW t R F t HD;STA t SP S CL t HD;STA t HD;DAT t HIGH t SU;DAT t SU;STA Sr t SU;STO P P S Fig.23 Definition of timing on the I2C-bus 2 Table 1 Characteristics of the SDA and SCL bus lines for I C-bus devices (Unless specified particularly, Ta=25℃, VCC=8.5V) Parameter 1 2 3 4 5 6 7 8 9 SCL clock frequency Bus free time between a STOP and START condition Hold time (repeated) START condition. After this period, the first clock pulse is generated LOW period of the SCL clock HIGH period of the SCL clock Set-up time for a repeated START condition Data hold time: Data set-up time Set-up time for STOP condition Symbol ｆSCL tBUF tHD;STA tLOW tHIGH tSU;STA tHD;DAT tSU;DAT tSU;STO Fast-mode I2C-bus Min. 0 1.3 0.6 1.3 0.6 0.6 0.06* 120 0.6 Max. 400 － － － － － － － － Unit kHz μS μS μS μS μS μS ns μS All values referred to VIH min. and VIL max. Levels (see Table 2). * A device must internally provide a hold time of at least 300 ns for the SDA signal (referred to the VIH min. of the SCL signal) in order to bridge the undefined region of the falling edge of SCL. About 7(tHD;DAT), 8(tSU;DAT), make it the setup which a margin is fully in . www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 8/25 2010.03 - Rev.A BD37524FS Technical Note Table 2 2 Characteristics of the SDA and SCL I/O stages for I C-bus devices Parameter 10 11 12 13 14 LOW level input voltage: HIGH level input voltage: Pulse width of spikes which must be suppressed by the input filter. LOW level output voltage: at 3mA sink current Input current each I/O pin with an input voltage between 0.4V and 4.5V. Symbol VIL VIH tSP VOL1 Ii Fast-mode devices Min. -0.3 2.3 0 0 -10 Max. 1 5 50 0.4 10 Unit V V ns V μA ｔHD;STA ：2us ｔHD;DAT ：1us ｔSU;DAT ：1us ｔSU;STO ：2us SCL ｔBUF ：4us ｔLOW ：3us ｔHIGH ：1us SDA SCL clock frequency：250kHz Fig.24 A command timing example in the I2C data transmission www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 9/25 2010.03 - Rev.A BD37524FS Technical Note （２）I2C BUS FORMAT MSB S 1bit LSB Slave Address 8bit S Slave Address MSB LSB MSB LSB A Select Address A Data A P 1bit 8bit 1bit 8bit 1bit 1bit = Start conditions (Recognition of start bit) = Recognition of slave address. 7 bits in upper order 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) （３）I2C BUS Interface Protocol 1）Basic form S Slave Address MSB LSB A MSB Select Address LSB A MSB Data LSB A P 2）Automatic increment (Select Address increases (+1) according to the number of data. S Slave Address A Select Address A Data1 A Data2 A ････ DataN A MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB (Example) ①Data1 shall be set as data of address specified by Select Address. ②Data2 shall be set as data of address specified by Select Address +1. ③DataN shall be set as data of address specified by Select Address +N-1. P 3）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 AP MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB （Note）If any data is transmitted as Select Address 2 next to data, it is recognized as data, not as Select Address 2. （４）Slave address MSB A6 1 A5 0 A4 0 A3 0 A2 0 LSB A1 0 A0 0 R/W 0 80H www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 10/25 2010.03 - Rev.A BD37524FS （５）Select Address & Data Items Initial setup 1 Select Address (hex) 01 MSB D7 Advanced switch ON/OFF LPF Phase 0 0 Mute ON/OFF D6 0 Level Meter RESET 0 0 0 Data D5 D4 Advanced switch time of Input Gain/Volume Tone/Fader/Loudness 0 0 0 0 0 D3 0 D2 0 Subwoofer LPF fc 0 Input selector Input Gain Volume Gain / Attenuation Fader Gain / Attenuation Fader Gain / Attenuation Fader Gain / Attenuation Fader Gain / Attenuation Fader Gain / Attenuation Bass fo 0 Middle fo 0 Treble fo 0 0 Technical Note LSB D1 D0 Advanced switch time of Mute LPF Phase 0 Level Meter RESET 1 Initial setup 2 Initial setup 3 Input Selector Input gain Volume gain Fader 1ch Front Fader 2ch Front Fader 1ch Rear Fader 2ch Rear Fader Subwoofer Bass setup Middle setup Treble setup Bass gain 02 03 05 06 20 28 29 2A 2B 2C 41 44 47 51 0 Loudness fo Middle gain 54 Treble gain Loudness Gain System Reset 57 75 FE 0 0 0 Bass Boost/ Cut Middle Boost/ Cut Treble Boost/ Cut 0 1 0 0 0 0 0 0 0 Bass Q Middle Q 0 Treble Q Bass Gain 0 0 Middle Gain 0 0 Treble Gain Loudness Gain 0 Loudness Hicut 0 0 0 0 0 1 Advanced switch Note １．In function changing of the hatching part, it works Advanced switch. ２．Upon continuous data transfer, the Select Address is circulated by the automatic increment function, as shown below. →01→02→03→05→06→20→28→29→2A→2B→2C →41→44→47→51→54→57→75 ３． For the function of input selector etc, it is not corresponded for advanced switch. Therefore, please apply mute on the side of a set when changes these setting. ４． When using mute function of this IC at the time of changing input selector, please switch mute ON/OFF for waiting advanced-mute time. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 11/25 2010.03 - Rev.A BD37524FS Select address 01 (hex) MSB Time D7 0.6msec Advanced 1.0msec Switch 1.4msec ON/OFF 3.2msec MSB D7 4.7 msec 7.1 msec 11.2 msec 14.4 msec Mode OFF ON Select address 02(hex) fc OFF 55Hz 85Hz 120Hz 160Hz Prohibition Mode HOLD RESET Phase 0° 180° Select address 03(hex) f0 250Hz 400Hz 800Hz Prohibition MSB D7 0 D6 0 D5 0 Loudness fo D4 D3 0 0 0 1 1 0 1 1 D2 0 MSB D7 D6 Level Meter RESET Subwoofer D5 D4 LPF D3 fc D2 0 0 0 0 1 Advanced Switch ON/OFF MSB D7 0 1 0 Technical Note Advanced D6 D5 0 switch time D4 D3 0 of D2 0 Advanced switch time of Input gain/Volume Tone/Fader/Loudness Mute D1 0 0 1 1 LSB D0 0 1 0 1 Time Advanced switch time of LSB Input gain/Volume/Tone/Fader/Loudness D6 D5 D4 D3 D2 D1 D0 0 0 0 1 Advanced switch Time 0 0 0 of Mute 1 0 1 1 Advanced switch D5 D4 D3 Advanced switch time of Input gain/Volume 0 Tone/Fader/Loudness ON/OFF D2 0 LSB D0 D6 D1 Advanced switch Time of Mute LPF Phase 0 0 0 D1 0 0 1 1 0 Other setting LSB D0 0 1 0 1 0 MSB D7 LPF Phase MSB D7 0 1 D6 0 1 Level Meter RESET D5 D4 D3 D2 0 0 LPF D4 0 0 Phase D3 0 D1 LSB D0 Subwoofer LPF fc LSB D0 D6 Level Meter RESET D5 0 D2 D1 Subwoofer LPF fc D1 0 LSB D0 1 : Initial condition www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 12/25 2010.03 - Rev.A BD37524FS Technical Note Select address 05(hex) MSB Input Selector LSB OUT OUT Mode F1/R1 F2/R2 D7 D6 D5 D4 D3 D2 D1 D0 A A1 A2 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 0 0 0 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 100kΩ(TYP) to 6 kΩ(TYP). (For quick charge of coupling capacitor) Select address 06 (hex) MSB Gain D7 0dB 1dB 2dB 3dB 4dB 5dB 6dB 7dB 8dB 9dB 10dB 11dB Mute ON/OFF 12dB 13dB 14dB 15dB 16dB 17dB 18dB 19dB 20dB Prohibition Input D4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 ： 1 Mute D4 Gain D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 1 ： 1 LSB D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 ： 1 LSB D0 D6 D5 0 0 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 0 ： 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 ： 1 Mode OFF ON MSB D7 0 1 D6 0 D5 0 ON/OFF D3 D2 D1 Input Gain : Initial condition www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 13/25 2010.03 - Rev.A BD37524FS Technical Note Select address 20, 28, 29, 2A, 2B, 2C (hex) MSB Vol, Gain & ATT D7 D6 0 0 0 0 Prohibition ： ： 0 1 15dB 0 1 14dB 0 1 13dB 0 1 ： ： ： -77dB 1 1 -78dB 1 1 -79dB 1 1 1 1 Prohibition ： ： 1 1 -∞dB 1 1 Fader D5 0 0 ： 1 1 1 1 ： 0 0 0 0 ： 1 1 Gain D4 0 0 ： 1 1 1 1 ： 0 0 0 1 ： 1 1 / Attenuation D3 D2 D1 0 0 0 0 0 0 ： ： ： 0 0 0 0 0 0 0 0 1 0 0 1 ： ： ： 1 1 0 1 1 1 1 1 1 0 0 0 ： ： ： 1 1 1 1 1 1 LSB D0 0 1 ： 0 1 0 1 ： 1 0 1 0 ： 0 1 : Initial condition www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 14/25 2010.03 - Rev.A BD37524FS Select address 41(hex) Q factor 0.5 1.0 1.5 2.0 fo 60Hz 80Hz 100Hz 120Hz Select address 44(hex) Q factor 0.75 1.0 1.25 1.5 fo 500Hz 1kHz 1.5kHz 2.5kHz Select address 47 (hex) Q factor 0.75 1.25 fo 7.5kHz 10kHz 12.5kHz 15kHz MSB D7 0 MSB D7 0 D6 0 Treble D5 D4 Treble fo Treble D4 0 1 0 1 Q factor D3 D2 0 fo D3 0 0 MSB D7 0 D6 0 Middle D5 D4 Middle fo Q factor D3 D2 0 0 MSB D7 0 D6 0 D5 Bass D4 Bass fo Q factor D3 D2 0 0 Technical Note D1 0 0 1 1 LSB D0 0 1 0 1 LSB D0 Bass Q factor MSB D7 0 D6 0 D5 0 0 1 1 Bass D4 0 1 0 1 fo D3 0 D2 0 D1 D1 0 0 1 1 LSB D0 0 1 0 1 LSB D0 Middle Q factor MSB D7 0 D6 0 D5 0 0 1 1 Middle D4 0 1 0 1 fo D3 0 D2 0 D1 D1 0 LSB D0 0 1 LSB D0 Treble Q factor D6 0 D5 0 0 1 1 D2 0 D1 0 : Initial condition www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 15/25 2010.03 - Rev.A BD37524FS Technical Note Select address 51, 54, 57 (hex) MSB Gain D7 0dB 1dB 2dB 3dB 4dB 5dB 6dB 7dB 8dB 9dB 10dB Bass/ 11dB Middle/ 12dB Treble Boost 13dB /cut 14dB 15dB 16dB 17dB 18dB 19dB 20dB Prohibition D6 Bass/ D5 0 0 Middle/ D4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 ： 1 1 Treble D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 ： 1 1 Gain D2 D1 0 0 0 0 0 1 0 1 1 0 1 0 1 1 1 1 0 0 0 0 0 1 0 1 1 0 1 0 1 1 1 1 0 0 0 0 0 1 0 1 1 0 1 0 ： ： 1 1 1 1 LSB D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 ： 0 1 LSB D0 Mode Boost Cut MSB D7 0 1 Bass/ D6 0 Middle/ D5 D4 0 Treble D3 Boost/Cut D2 D1 Bass/Middle/Treble Gain : Initial condition www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 16/25 2010.03 - Rev.A BD37524FS Technical Note Select address 75 (hex) MSB Mode D7 Hicut1 Hicut2 0 Hicut3 Hicut4 Gain 0dB 1dB 2dB 3dB 4dB 5dB 6dB 7dB 8dB 9dB 10dB 11dB 12dB 13dB 14dB 15dB 16dB 17dB 18dB 19dB 20dB Prohibition MSB D7 D6 0 0 1 1 D5 0 1 0 1 Loudness D4 Hicut D3 D2 Loudness Gain D1 LSB D0 0 Loudness Gain D4 D3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 Loudness Hicut 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 ： ： 1 1 D6 D5 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 ： 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 ： 1 LSB D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 ： 1 : Initial condition （６）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. Limit Item Symbol Unit Condition Min. Typ. Max. Rise time of VCC Trise 33 － － usec VCC rise time from 0V to 5V VCC voltage of release Vpor － 4.1 － V power on reset （７）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 GND～1.0V 2.3V～VCC Mode MUTE ON MUTE OFF Establish the voltage of MUTE in the condition to have been defined. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 17/25 2010.03 - Rev.A BD37524FS Technical Note Volume / Fader volume attenuation of the details (dB) +15 +14 +13 +12 +11 +10 +9 +8 +7 +6 +5 +4 +3 +2 +1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15 -16 -17 -18 -19 -20 -21 -22 -23 -24 -25 -26 -27 -28 -29 -30 -31 -32 D7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D6 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 D5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 D4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 D3 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 D2 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 D1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 D0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 (dB) -33 -34 -35 -36 -37 -38 -39 -40 -41 -42 -43 -44 -45 -46 -47 -48 -49 -50 -51 -52 -53 -54 -55 -56 -57 -58 -59 -60 -61 -62 -63 -64 -65 -66 -67 -68 -69 -70 -71 -72 -73 -74 -75 -76 -77 -78 -79 -∞ D7 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 D4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 D3 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 D2 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 1 D1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 1 D0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 ：Initial condition www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 18/25 2010.03 - Rev.A BD37524FS Technical Note About Level meter （１） 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. （２） The way to reset level meter output Please send reset data through I2C BUS When reset output of level meter：Send D6 = “ 1 “ of select address 02(hex). When cancel of output reset of level meter (HOLD)… → Send D6 = “ 0 “ of select address 02(hex). （３） The settings about period of reset Peak hold operation will start after HOLD data is transmitted. Set the WAIT time after HOLD data 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 I2C BUS (RESET) I CBUS 2 transmission (HOLD) 80 02 00 80 1 02 0 40 RESET START LOUT [ V ] HOLD START Wait time (25msec) ※fin＝40Hz detect t www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 19/25 2010.03 - Rev.A BD37524FS ●Application circuit G ND SDA SCL VCC OUTF1 OUTF2 OUTR1 OUTR2 OUTS1 OUTS2 LOUT 10μ 0.1μ 10μ 10μ 10μ 10μ 10μ 10μ MUTE Technical Note 24 23 22 21 VCC 20 19 18 17 16 15 14 13 GND I2C BUS LOGIC ■Fader Gain:+15dB～-79ｄB/1dB step ★no pop noise ■LPF fc=55/85/120/160Hz ■Loudness Gain:20dB～0ｄB/1ｄB step ★no pop noise ・ｆ0=250/400/800Hz ・Hicut:1/2/3/4 ■3 Band P-EQ (Tone control) Gain：+20dB～-20dB/1dB step ★no pop noise ・Bass：f0=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 ・Treble：f0=7.5k/10k/12.5k/15kHz Q=0.75/1.25 ■Volume Gain：+15dB～-79dB/1dB step ★no pop noise ■Input Gain Gain：+20dB～0dB/1dB step ★no pop noise Input selector (4 single-end and 1 stereo ISO) GND ISO amp VCC/2 100k 1 2 2.2μ Fader★ ★Loudness ★3 Band P-EQ (Tone control) ★Volume/Mute Level meter ★Input Gain Fader★ Fader★ GND ISO amp 250k 7 8 10μ 2.2μ Fader★ LPF Fader★ 100k 3 2.2μ 100k 4 2.2μ 100k 5 2.2μ 250k 6 2.2μ 250k 9 250k 10 1μ 250k 11 1μ 250k 12 1μ 250k 10μ 1μ Unit R : [Ω] C : [F] Single1 Single2 GND Isolation Single3 Single4 Fig.25 Application Circuit Diagram Notes on wiring ① Please connect the decoupling capacitor of a power supply in the shortest distance as much as possible to GND. ② Lines of GND shall be one-point connected. ③ Wiring pattern of Digital shall be away from that of analog unit and cross-talk shall not be acceptable. ④ Lines of SCL and SDA of I2C BUS shall not be parallel if possible. The lines shall be shielded, if they are adjacent to each other. ⑤ Lines of analog input shall not be parallel if possible. The lines shall be shielded, if they are adjacent to each other. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 20/25 2010.03 - Rev.A BD37524FS ●Interfaces Terminal No. Technical Note Terminal Name Terminal Voltage Vcc Equivalent Circuit Terminal Description A terminal for signal input. The input impedance is 100kΩ(typ). 2 3 4 5 A1 A2 B1 B2 GND Vcc 4.25 100K 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 250kΩ(typ). 250k GND V cc 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. 13 MUTE － 1 .65V GND VCC A terminal for fader and Subwoofer output. 16 17 18 19 20 OUTS1 OUTR2 OUTR1 OUTF2 OUTF1 GND 4.25 The figure in the pin explanation and input/output equivalent circuit is reference value, it doesn’t guarantee the value. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 21/25 2010.03 - Rev.A BD37524FS Technical Note Terminal No. Terminal Name Terminal Voltage Equivalent Circuit Terminal Description Power supply terminal. 21 VCC 8.5 Vcc A terminal for clock input of I2C BUS communication. 22 SCL － 1.65V GND Vcc A terminal for data input of I2C BUS communication. 23 SDA － 1.65V GND Ground terminal. 24 GND 0 Vcc 50k Voltage for reference bias of analog signal system. The simple precharge circuit and simple discharge circuit for an external capacitor are built in. 1 FIL 4.25 50k GND The figure in the pin explanation and input/output equivalent circuit is reference value, it doesn’t guarantee the value. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 22/25 2010.03 - Rev.A BD37524FS ●Notes for use Technical Note 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 RIN(Ω) inside IC and please decide. The first HPF characteristic of RC is composed. G〔dB〕 C〔F〕 0 RIN 〔Ω〕 A(f) Ｓ Ｓ INPUT f〔Hz〕 A(f)  (2πfCRIN) 2 1  (2πfCRIN) 2 2) About the input selector SHORT SHORT mode is the command which makes switch SSH =ON an input selector part and input impedance RIN of all terminals, and makes resistance small. Switch SSH 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 SSH 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 2.2kΩ) to Mute terminal in series, if voltage is supplied to mute terminal in case. (Please refer Application Circuit Diagram.) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 23/25 2010.03 - Rev.A BD37524FS ●Thermal Derating Curve Technical Note About the thermal design by the IC Characteristics of an IC have a great deal to do with the temperature at which it is used, and exceeding absolute maximum ratings may degrade and destroy elements. Careful consideration must be given to the heat of the IC from the two standpoints of immediate damage and long-term reliability of operation. Reference data 1.5 SSOP-A24 Measurement condition: ROHM Standard board board Size：70×70×1.6(㎣) material：A FR4 grass epoxy board (3% or less of copper foil area) Power Dissipation Pd（W） 1.0 1.0W θja = 125℃/W 0.5 0.0 0 25 50 75 85 100 125 150 Ambient Temperature Ta（℃） Fig.26 Temperature Derating Curve Note) Values are actual measurements and are not guaranteed. Power dissipation values vary according to the board on which the IC is mounted. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 24/25 2010.03 - Rev.A BD37524FS ●Ordering part number Technical Note B D 3 Part No. 37524 7 5 2 4 F S - E 2 Part No. Package FS : SSOP-A24 Packaging and forming specification E2: Embossed tape and reel SSOP-A24 10 ± 0.2 (MAX 10.35 include BURR) 24 13 +6° 4° −4° Tape Quantity Embossed carrier tape 2000pcs E2 The direction is the 1pin of product is at the upper left when you hold 7.8 ± 0.3 5.4 ± 0.2 1 12 0.1±0.1 1.8±0.1 +0.1 0.17 −0.05 1.2 ± 0.15 Direction of feed 0.5 ± 0.2 ( reel on the left hand and you pull out the tape on the right hand ) 0.8 0.1 0.38±0.1 1pin (Unit : mm) Direction of feed Reel ∗ Order quantity needs to be multiple of the minimum quantity. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 25/25 2010.03 - Rev.A Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified 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 specifications, 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 specified 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 specified herein is intended only to show the typical functions of and examples of application circuits for the Products. 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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 specified 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. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. ROHM Customer Support System http://www.rohm.com/contact/ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. R1010A