Datasheet Sound Processor with Built-in 3-band Equalizer BD37524FS General Description Key Specifications BD37524FS is a sound processor with built-in 3-band equalizer for car audio. Other features are stereo 5ch input selector, input-gain control, main volume, loudness, 5ch fader volume, LPF for subwoofer, level meter. It is equipped with an “Advanced switch circuit”, which is an original ROHM technology that reduces various switching noise (ex. No-signal, low frequency likes 20Hz & large signal inputs). The “Advanced switch” makes control of microcomputer easier and can be used for designing high quality car audio systems. Features Reduced switching noise of input gain control, mute, main volume, fader volume, bass, treble, and loudness by using advanced switch circuit Built-in differential input selector and 4 single-ended input selectors Built-in ground isolation amplifier inputs, which is ideal for external stereo input. Built-in input gain controller reduces switching noise for volume of a portable audio input. Lesser number of external components due to built-in 3-band equalizer filter, LPF for subwoofer, loudness filter. This makes,it possible to control the Q, Gv, fo of 3-band equalizer, fc of LPF, fo, and Gv of loudness through I2C BUS. A gain adjustment quantity of ±20dB with 1 dB step gain adjustment is possible for bass, middle, and treble. Built-in subwoofer output terminals. Energy-saving design resulting in low current consumption is achieved by utilizing the Bi-CMOS process. It has the advantage in quality over scaling down the power heat control of the internal regulators. Input pins and output pins are organized and separately laid out to keep the signal flow in one direction which consequently, simplify pattern layout of the set board and decrease the board dimensions. . It is possible to be controlled by a 3.3V / 5V I2C BUS ○Product structure：Silicon monolithic integrated circuit www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・14・001 Power Supply Voltage Range: 7.0V to 9.5V Circuit Current (No Signal): 38mA(Typ) Total Harmonic Distortion1 (FRONT,REAR): 0.001%(Typ) Total Harmonic Distortion2 (SUBWOOFER): 0.002%(Typ) Maximum Input Voltage: 2.3Vrms(Typ) Cross-talk Between Selectors: -100dB(Typ) Volume Control Range: +15dB to -79dB Output Noise Voltage1 (FRONT,REAR): 3.8µVrms(Typ) Output Noise Voltage2 (SUBWOOFER): 4.8µVrms(Typ) 1.8µVrms(Typ) Residual Output Noise Voltage: Operating Temperature Range: -40°C to +85°C Package W(Typ) x D(Typ) x H(Max) SSOP-A24 10.00mm x 7.80mm x 2.10mm Applications It is optimal for car audio systems. It is also suitable for other audio equipment such as mini Compo, micro Compo, TV etc ○This product has no designed protection against radioactive rays 1/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Typical Application Circuit BD37524FS Pin Configuration TOP VIEW FIL 1 24 A1 2 23 SDA A2 3 22 SCL B1 4 21 VCC B2 5 20 OUTF1 CP1 6 19 OUTF2 CN 7 18 OUTR1 17 OUTR2 9 16 OUTS1 10 15 OUTS2 E1 11 14 LOUT E2 12 13 MUTE CP2 8 D1 D2 GND Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 Pin Name FIL A1 A2 B1 B2 CP1 CN CP2 D1 D2 E1 E2 Description VCC/2 terminal 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 www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 Pin No. 13 14 15 16 17 18 19 20 21 22 23 24 2/31 Pin 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 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Block Diagram 18 17 Fader★ 13 14 15 16 19 Fader★ 20 21 22 23 Fader★ 24 VCC GND I2C BUS LOGIC Fader★ Fader★ ■Fader Fader Gain:+15dB to -79dB/1dB step step Gain:+15dB～-79ｄB/1dB ★no pop noise ■LPF fc=55/85/120/160Hz ■Loudness Loudness Gain: 20dB to 0dB/1dB step step Gain:20dB～0ｄB/1ｄB ★no pop noise ・ｆ0=250/400/800Hz ・Hicut:1/2/3/4 ■3 Band P-EQ (Tone control) Gain：+20dB～-20dB/1dB Gain: +20dB to -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 to -79dB/1dB step step Gain：+15dB～-79dB/1dB ★no pop noise ■Input Gain Gain: +20dB to 0dB/1dB step step Gain：+20dB～0dB/1dB ★no pop noise LPF ★Loudness ★3 Band P-EQ (Tone control) ★Volume/Mute Level meter ★Input Gain Input selector (4 single-end and 1 stereo ISO) GND ISO amp GND ISO amp VCC/2 1 2 3 www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 4 5 6 7 3/31 8 9 10 250k 250k 250k 250k 250k 250k 250k 100k 100k 100k 100k 11 12 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Absolute Maximum Ratings (Ta=25°C) Parameter Symbol Power supply Voltage Input voltage Power Dissipation Rating Unit VCC 10.0 V VIN VCC+0.3 to GND-0.3 V Pd Storage Temperature 1 Tstg (Note 1) W -55 to +150 °C (Note 1) When mounted on standard board (70 x 70 x 1.6(mm3)), derate by 8mW/°C for Ta above25°C. Thermal resistance θja = 125(°C/W) 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 circuit 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 Conditions Parameter Symbol Min Typ Max Unit Power Supply Voltage VCC 7.0 － 9.5 V Temperature Topr -40 － +85 °C Electrical Characteristics GENERAL BLOCK (Unless otherwise noted, Ta=25°C, 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 Parameter Symbol Unit Conditions Min Typ Max Circuit Current (No Signal) IQ － 38 48 mA No signal Voltage Gain GV -1.5 0 +1.5 dB GV=20log(VOUT/VIN) Channel Balance Total Harmonic Distortion 1 (FRONT,REAR) Total Harmonic Distortion 2 (SUBWOOFER) Output Noise Voltage 1 (FRONT,REAR) * Output Noise Voltage 2 (SUBWOOFER) * CB -1.5 0 +1.5 dB THD+N1 － 0.001 0.05 ％ THD+N2 － 0.002 0.05 ％ VNO1 － 3.8 15 μVrms VNO2 － 4.8 15 μVrms Residual Output Noise Voltage * VNOR － 1.8 10 μVrms Crosstalk Between Channels * CTC － -100 -90 dB RR － -70 -40 dB CB = GV1-GV2 VOUT=1Vrms BW=400Hz-30KHz VOUT=1Vrms BW=400Hz-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) INPUT GAIN INPUT SELECTOR Ripple Rejection Input Impedance(A, B) RIN_S 70 100 130 kΩ Input Impedance (C,D,E) RIN_D 175 250 325 kΩ Maximum Input Voltage VIM 2.1 2.3 － Vrms Crosstalk Between Selectors * CTS － -100 -90 dB Common Mode Rejection Ratio * CMRR 50 65 － dB Minimum Input Gain GIN_MIN -2 0 +2 dB Maximum Input Gain GIN_MAX 18 20 22 dB Gain Set Error GIN_ERR -2 0 +2 dB www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 4/31 VIM at THD+N(VOUT)=1％ BW=400Hz-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=+20dB to +1dB TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Level meter LOUDNESS FADER / SUBWOOFER TREBLE MIDDLE BASS VOLUME MUTE BLOCK Electrical Characteristics - continued Limit Parameter Symbol Min Typ Max Unit Conditions Mute ON GMUTE=20log(VOUT/VIN) BW = IHF-A Mute Attenuation * GMUTE － -105 -85 dB Maximum Gain GV_MAX 13 15 17 dB Maximum Attenuation * GV_MIN － -100 -85 dB Attenuation Set Error 1 GV_ERR1 -2 0 +2 dB Volume = 15dB VIN=100mVrms GV=20log(VOUT/VIN) Volume = -∞dB GV=20log(VOUT/VIN) BW = IHF-A GAIN & ATT=+15dB to -15dB Attenuation Set Error 2 GV_ERR2 -3 0 +3 dB ATT=-16dB to -47dB Attenuation Set Error 3 GV_ERR3 -4 0 +4 dB Maximum Boost Gain GB_BST 18 20 22 dB Maximum Cut Gain GB_CUT -22 -20 -18 dB Gain Set Error GB_ERR -2 0 +2 dB Maximum Boost Gain GM_BST 18 20 22 dB Maximum Cut Gain GM_CUT -22 -20 -18 dB Gain Set Error GM_ERR -2 0 +2 dB Maximum Boost Gain GT_BST 18 20 22 dB Maximum Cut Gain GT_CUT -22 -20 -18 dB Gain Set Error GT_ERR -2 0 +2 dB ATT=-48dB to -79dB Gain=+20dB f=100Hz VIN=100mVrms GB=20log (VOUT/VIN) Gain=-20dB f=100Hz VIN=2Vrms GB=20log (VOUT/VIN) Gain=+20dB to -20dB f=100Hz gain=+20dB f=1KHz VIN=100mVrms GM=20log (VOUT/VIN) Gain=-20dB f=1KHz VIN=2Vrms GM=20log (VOUT/VIN) Gain=+20dB to -20dB f=1KHz Gain=+20dB f=10kHz VIN=100mVrms GT=20log (VOUT/VIN) Gain=-20dB f=10kHz VIN=2Vrms GT=20log (VOUT/VIN) Gain=+20dB to -20dB f=10kHz Maximum Boost Gain GF_BST 13 15 17 dB Maximum Attenuation＊ GF_MIN － -100 -90 dB Gain Set Error GF_ERR -2 0 +2 dB Fader=15dB VIN=100mVrms GF=20log(VOUT/VIN) Fader = -∞dB GF=20log(VOUT/VIN) BW = IHF-A Gain=+15dB to +1dB Attenuation Set Error 1 GF_ERR1 -2 0 +2 dB ATT=-1dB to -15dB Attenuation Set Error 2 GF_ERR2 -3 0 +3 dB ATT=-16dB to -47dB Attenuation Set Error 3 GF_ERR3 -4 0 +4 dB ATT=-48dB to -79dB Output Impedance ROUT － － 50 Ω VIN =100mVrms Maximum Output Voltage VOM 2 2.2 － Vrms Maximum Gain GL_MAX 17 20 23 dB Gain Set Error GL_ERR -2 0 +2 dB Maximum Output Voltage VL_MAX 2.8 3.1 3.5 V VL_OFF － 0 100 mV Output Offset Voltage THD+N=1% BW=400Hz-30KHz Gain 20dB VIN=100mVrms GL=20log(VOUT/VIN) GAIN=+20dB to +1dB 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 © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 5/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Typical Performance Curves 10 20 10 0 0 2 4 6 8 0.1 0.1 0.01 0.01 0.001 0.01 VCC[V] Power Supply Voltage : VCC [V] Figure 2. THD+N vs Output Voltage 4 Gain=0dB 1 Gain [dB] Gain (dB) 3 0 -1 -2 -3 -4 10 100 1k 10k 100k Frequency [Hz] 25 20 15 10 5 BASS GAIN : -20dB to +20dB /1dB step fo : 60Hz Q : 0.5 0 -5 -10 -15 -20 -25 10 100 1k 10k 100k Frequency [Hz] Figure 3. Gain vs Frequency www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 10 Vout (V) 5 -5 1 Output Voltage : VOUT [Vrms] Figure 1. Circuit Current (No Signal) vs Power Supply Voltage 2 0.1 Figure 4. Bass Gain vs Frequency 6/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 Vout 1kHz 100Hz 0.001 0.001 10 1 10kHz VIN [Vrms] 30 10 1 THD+N [%] THD+N (%) 40 Iq[mA] Circuit Current (No Signal) : IQ [mA] 50 BD37524FS Typical Performance Curves – continued 25 fo : 60/80/100/120Hz BASS GAIN : ±20dB Q : 0.5 20 15 Gain [dB] Gain [dB] 10 5 0 -5 -10 -15 -20 -25 10 100 1k 10k 25 20 15 10 5 Q : 0.5/1/1.5/2 BASS GAIN : ±20dB fo : 60Hz 0 -5 -10 -15 -20 -25 100k 10 Frequency [Hz] Gain [dB] Gain [dB] Gain[dB] fo : 500Hz Q : 0.75 100 1k 10k 100k Figure 6. Bass Q vs Frequency MIDDLE GAIN : -20dB to +20dB /1dB step 10 1k Frequency [Hz] Figure 5. Bass fo vs Frequency 25 20 15 10 5 0 -5 -10 -15 -20 -25 100 10k 100k 25 20 15 10 5 fo : 500/1k/1.5k/2.5kHz 0 -5 -10 -15 -20 -25 10 Frequency [Hz] 100 1k 10k 100k Frequency [Hz] Figure 8. Middle fo vs Frequency Figure 7. Middle Gain vs Frequency Figure 7 .Middle Gain vs Freq www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 7/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Typical Performance Curves – continued 25 25 20 Gain (dB) Gain [dB] 10 5 0 -5 Gain [dB] 15 -10 MIDDLE GAIN : ±20dB fo : 1kHz -15 1k 10k 5 0 -5 -10 -20 -25 -25 100 15 10 -15 -20 10 TREBLE GAIN:-20dB to +20dB /1dB step fo : 7.5kHz Q : 0.75 20 Q : 0.75/1/1.25/1.5 100k 10 Frequency [Hz] 100 1k 10k 100k Frequency [Hz] Figure 10. Treble Gain (Hz) vs Frequency Frequency Figure 9. Middle Q vs Frequency 25 fo : 7.5k/10k/12.5k/15kHz TREBLE GAIN : ±20dB Q : 0.75 20 15 Q : 0.75/1.25 TREBLE GAIN : ±20dB fo : 7.5kHz 20 15 Gain (dB) 0 -5 Gain [dB] 10 10 5 Gain[dB] Output Noise [µVrms] 25 5 0 -10 -5 -10 -15 -15 -20 -20 -25 -25 10 100 1k 10k 10 100k 100 1k 10k 100k Frequency (Hz) Frequency [Hz] Frequency (Hz) Figure 11. Treble fo vs Frequency www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 Figure 12. Treble Q vs Frequency 8/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Typical Performance Curves – continued 1000 Din-Audio 出力雑音電圧 [uVrms] Output Noise [µVrms] 出力雑音電圧[uVrms] Output Noise [µVrms] 1000 IHF-A 100 10 DIN-Audio 100 10 1 1 -80 -70 -60 -50 -40 -30 -20 -10 0 VolumeGain[dB] Gain [dB] Volume 10 20 -20 -15 -10 -5 0 5 10 15 20 Bass Gain [dB] Bass Gain [dB] Figure 14. Output Noise vs Bass Gain Figure 13. Output Noise vs Volume Gain 1000 1000 IHF-A 出力雑音電圧 [uVrms] Output Noise [µVrms] DIN-Audio 出力雑音電圧 [uVrms] Output Noise [µVrms] IHF-A 100 10 1 DIN-Audio IHF-A 100 10 1 -20 -15 -10 -5 0 5 10 15 20 MiddleGain Gain [dB] [dB] Middle -20 -15 -10 -5 0 5 10 15 20 Treble Gain [dB] Treble Gain [dB] Figure 15. Output Noise vs Middle Gain www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 Figure 16. Output Noise vs Treble Gain 9/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Typical Performance Curves – continued 2.5 0 最大出力[Vrms] Output Voltage : VOUT [Vrms] Gain (dB) Gain [dB] -10 -20 -30 -40 -50 -60 -70 2.0 1.5 1.0 0.5 0.0 10 100 1k 10k 100k Frequency [Hz] 100 1000 10000 R LOAD [ohm] 出力負荷[ohm] FigureFrequency 17. CMRR vs(Hz) Frequency Figure 18. Output Voltage vs RLOAD Figure 19. Advanced Switch 1 Figure 20. Advanced Switch 2 www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 10/31 100000 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Typical Performance Curves – continued 3.5 Output Voltage : VOUT [V] 3 2.5 2 1.5 1 0.5 0 0 0.5 1 1.5 2 2.5 3 Input Voltage : VIN [Vrms] Figure 21. Output Voltage vs Level Meter VIN www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 11/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Timing Chart Control Signal Specification (1) Electrical Specifications and Timing for Bus Lines and I/O Stages SDA tBUF tLOW tHD;STAT tF t R tSP SCL tHD;STA P tHD;DAT tHIGH tSU;DAT tSU;STAT tSU;STOT Sr S P Figure 22. Definition of Timing on the I2C-bus Table 1 Characteristics of the SDA and SCL bus lines for I2C-bus devices (Unless specified otherwise, Ta=25°C, VCC=8.5V) Parameter Symbol SCL clock frequency Bus free time between a STOP and START condition Hold time (repeated) START condition. After this period, the first 3 clock pulse is generated 4 LOW period of the SCL clock 5 HIGH period of the SCL clock 6 Set-up time for a repeated START condition 7 Data hold time: 8 Data set-up time 9 Set-up time for STOP condition All values are referred to VIH min and VIL max Levels (see Table 2). 1 2 Fast-mode I2C-bus Unit fSCL tBUF Min 0 1.3 Max 400 － kHz μS tHD;STA 0.6 － μS tLOW tHIGH 1.3 0.6 0.6 0.06(Note) 120 0.6 － － － － － － μS μS μS μS ns μS tSU;STA tHD;DAT tSU;DAT tSU;STO (Note) The device must internally provide a hold time of at least 300 ns for the SDA signal (refer to the VIH min of the SCL signal) in order to bridge the undefined region of the falling edge of SCL. For 7(tHD;DAT) and 8(tSU;DAT), make the setup in which the margin is fully in . Table 2 Characteristics of the SDA and SCL I/O stages for I2C-bus devices Parameter 10 11 12 13 14 Symbol LOW level input voltage: VIL HIGH level input voltage: VIH Pulse width of spikes which must be suppressed by the input filter. tSP LOW level output voltage: at 3mA sink current VOL1 Input current each I/O pin with an input voltage between 0.4V and II 4.5V. tHD;STA tHD;DAT tSU;DAT ｔHD;STA ｔHD;DAT ｔSU;DAT ：2us ：1us ：1us :2µs :1µs :1µs Fast-mode devices Min -0.3 2.3 0 0 Max +1 5 50 0.4 -10 +10 Unit V V ns V μA tSU;STO ｔSU;STO ：2us :2µs SCL SCL ｔBUF tBUF ：4us :4µs ｔLOW tLOW ：3us :3µs ｔHIGH tHIGH ：1us :1µs SDA SDA SCL : 250 kHz SCLclock clockfrequency frequency：250kHz Figure 23. A Command Timing Example in the I2C Data Transmission www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 12/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS (2) I2C BUS FORMAT S 1bit MSB LSB Slave Address 8bit S Slave Address A Select Address Data P MSB LSB MSB LSB A Select Address A Data A P 1bit 8bit 1bit 8bit 1bit 1bit = Start condition (Recognition of start bit) = Recognition of slave address. The first 7 bits corresponds to slave address.. The least significant bit is “L” corresponds to write mode. = ACKNOWLEDGE bit (Recognition of acknowledgement) = Select address for volume, bass and treble. = Data on every volume and tone. = Stop condition (Recognition of stop bit) (3) I2C BUS Interface Protocol (a) Basic form S Slave Address A Select Address MSB LSB MSB LSB A Data A MSB LSB P (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) 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. DataN A P MSB LSB (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 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. P (4) Slave address MSB A6 1 A5 0 www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 A4 0 A3 0 A2 0 13/31 A1 0 A0 0 LSB R/W 0 80H TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS (5) Select Address & Data Select Address (hex) Items MSB Data D7 D6 0 Initial setup 1 01 Advanced switch ON/OFF Initial setup 2 02 LPF Phase Initial setup 3 Input Selector 03 05 Input gain 06 Volume gain Fader 1ch Front Fader 2ch Front Fader 1ch Rear Fader 2ch Rear Fader Subwoofer Bass setup Middle setup Treble setup 20 28 29 2A 2B 2C 41 44 47 Bass gain 51 Middle gain 54 Treble gain 57 Loudness Gain System Reset 75 FE 0 0 Mute ON/OFF 0 0 0 Bass Boost/ Cut Middle Boost/ Cut Treble Boost/ Cut 0 1 Level Meter RESET 0 0 0 D5 D4 Advanced switch time of Input Gain/Volume Tone/Fader/Loudnes s LSB D3 D2 0 0 0 Subwoofer LPF fc LPF Phase 0 Input selector 0 0 0 0 0 Loudness fo 0 D0 Advanced switch time of Mute Level Meter RESET 1 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 0 0 D1 0 0 0 0 0 Bass Gain 0 0 Middle Gain 0 0 Treble Gain Loudness HiCut 0 0 0 0 Bass Q Middle Q 0 Treble Q Loudness Gain 0 0 1 Advanced switch Note 1. The advance switch works in the latch part while changing from one function to another. 2. Upon continuous data transfer, the Select Address rolls back to the first address on 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. Advanced switch is not used for the function of input selector. Therefore, please turn on MUTE when changing the settings of this side of a set. 4. When using Mute function when changing input selector, please switch Mute ON/OFF for waiting advanced-mute time. www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 14/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Select address 01 (hex) MSB Time D7 0.6msec Advanced 1.0msec Switch 1.4msec ON/OFF 3.2msec Time MSB D7 4.7 msec 7.1 msec 11.2 msec 14.4 msec Advanced Switch ON/OFF Mode MSB D7 OFF 0 ON 1 Select address 02(hex) MSB fc D7 OFF 55Hz 85Hz LPF Phase 120Hz 160Hz Prohibition Mode MSB D7 HOLD RESET LPF Phase Phase MSB D7 0° 0 180° 1 Select address 03(hex) MSB f0 D7 250Hz 400Hz 0 800Hz Prohibition Advanced switch time of Mute D5 D4 D3 D2 D1 0 Advanced switch time 0 0 of Input gain/Volume 0 0 1 Tone/Fader/Loudness 1 D6 LSB D0 0 1 0 1 Advanced switch time of LSB Input gain/Volume/Tone/Fader/Loudness D6 D5 D4 D3 D2 D1 D0 0 0 0 1 Advanced switch 0 0 0 Time of Mute 1 0 1 1 D6 0 D6 Level Meter RESET D6 0 1 Advanced switch ON/OFF LSB D5 D4 D3 D2 D1 D0 Advanced switch time Advanced switch of Input gain/Volume 0 0 Time of Mute Tone/Fader/Loudness Subwoofer LPF fc D5 D4 D3 D2 0 0 0 0 0 0 0 1 Level Meter RESET D5 D4 D3 D2 0 0 D6 Level Meter RESET D5 D6 D5 0 0 0 LPF Phase D4 D3 0 0 D1 LSB D0 0 1 0 1 0 LSB D0 Subwoofer LPF fc D2 0 Loudness fo D4 D3 0 0 0 1 1 0 1 1 D1 0 0 1 1 0 Other setting D1 LSB D0 Subwoofer LPF fc D2 D1 LSB D0 0 0 1 : Initial condition www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 15/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Select address 05(hex) MSB Input Selector OUT OUT Mode F1/R1 F2/R2 D7 D6 D5 D4 D3 D2 D1 Initial 0 0 0 A A1 A2 0 0 0 B B1 B2 0 0 1 C diff CP1 CP2 0 1 1 0 0 0 0 D D1 D2 1 0 1 E E1 E2 1 0 1 Input SHORT 1 0 0 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 12dB ON/OFF 13dB 14dB 15dB 16dB 17dB 18dB 19dB 20dB D6 D5 0 0 Input 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 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 1 ： ： D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 0 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 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 ： 1 ： 1 Mute ON/OFF D4 D3 D2 D1 LSB D0 Prohibition 1 Mode OFF ON MSB D7 0 1 D6 D5 0 0 LSB D0 0 1 0 0 0 1 1 1 Input Gain : Initial condition www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 16/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS 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 ： ： ： Fader D5 0 0 Gain / Attenuation D4 D3 D2 D1 0 0 0 0 0 0 0 0 LSB D0 0 1 ： 1 1 1 1 ： 1 1 1 1 ： 0 0 0 0 ： 0 0 0 0 ： 0 0 1 1 ： 0 1 0 1 -77dB -78dB -79dB 1 1 1 1 1 1 1 1 ： 0 0 0 0 ： 0 0 0 1 ： 1 1 1 0 ： 1 1 1 0 ： 0 1 1 0 ： 1 0 1 0 Prohibition ： 1 1 ： 1 1 ： 1 1 ： 1 1 ： 1 1 ： 1 1 ： 1 1 ： 0 1 D5 Bass D4 D1 0 0 1 1 LSB D0 0 1 0 1 D1 LSB D0 -∞dB Select address 41(hex) Q factor MSB D7 D6 0.5 1.0 1.5 2.0 0 0 fo MSB D7 D6 60Hz 80Hz 100Hz 120Hz 0 0 Q factor MSB D7 D6 0.75 1.0 1.25 1.5 0 0 fo MSB D7 D6 500Hz 1kHz 1.5kHz 2.5kHz 0 0 Q factor D3 D2 Bass fo Bass D4 0 1 0 1 D5 0 0 1 1 0 fo D3 0 0 D2 Bass Q factor 0 Select address 44(hex) D5 Middle D4 Middle fo D5 0 0 1 1 Q factor D3 D2 0 Middle fo D4 D3 0 1 0 0 1 0 D2 0 D1 0 0 1 1 LSB D0 0 1 0 1 D1 LSB D0 Middle Q factor : Initial condition www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 17/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Select address 47 (hex) Q factor MSB D7 D6 0.75 1.25 0 0 fo MSB D7 D6 7.5kHz 10kHz 12.5kHz 15kHz 0 0 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 13dB Boost 14dB /Cut 15dB 16dB 17dB 18dB 19dB 20dB D6 0 D5 Treble D4 Treble fo D5 0 0 1 1 Boost Cut 0 Treble fo D4 D3 0 1 0 0 1 ： 1 1 MSB D7 0 1 0 ： 1 1 D1 0 D2 D1 0 0 Bass/ Middle/ Treble Gain D5 D4 D3 D2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 1 0 0 1 1 0 1 1 0 1 1 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 1 0 1 Prohibition Mode Q factor D3 D2 ： 1 1 0 LSB D0 Treble Q factor D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 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 1 ： 0 1 Bass/ Middle/ Treble Boost/Cut D6 D5 D4 D3 D2 D1 0 LSB D0 0 1 LSB D0 Bass/Middle/Treble Gain : Initial condition www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 18/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Select address 75 (hex) Mode MSB D7 HiCut1 HiCut2 HiCut3 HiCut4 0 Gain MSB D7 0dB 1dB 2dB 3dB 4dB 5dB 6dB 7dB 8dB 9dB 10dB 11dB 12dB 13dB 14dB 15dB 16dB 17dB 18dB 19dB 20dB 0 D1 LSB D0 Loudness Gain D4 D3 D2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 Loudness HiCut 0 1 1 0 1 1 0 1 1 0 1 1 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 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 0 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 ： 1 ： 1 D6 0 0 1 1 D5 0 1 0 1 D6 Loudness HiCut D4 D3 D2 Loudness Gain D5 Prohibition ： 1 ： 1 : Initial condition (6) About Power ON Reset The IC has a built-in initialization circuit that triggers at power ON of supply voltage. Please send initial data to all addresses at supply voltage ON. Also, please turn ON MUTE at the set side until this initial data is sent. Parameter Symbol Rise Time of VCC VCC Voltage of Release Power ON Reset Limit Unit Min Typ Max tRISE 33 － － µsec VPOR － 4.1 － V Conditions VCC rise time from 0V to 5V (7) About External Compulsory Mute Terminal It is possible to forcibly set Mute externally by setting the input voltage at the MUTE terminal. Mute Voltage Condition GND to 1.0V 2.3V to VCC Mode MUTE ON MUTE OFF Establish the voltage of MUTE in the condition to be defined. www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 19/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Application Information 1. Function and Specifications Function Input selector Input gain Mute Volume Specifications ・Stereo 4 input ・Differential 1 input ・+20dB to 0dB (1dB step) ・Possible to use “Advanced switch” for prevention of switching noise. ・Possible to use “Advanced switch” for prevention of switching noise. ・+15dB to -79dB (1dB step), -∞dB ・Possible to use “Advanced switch” for prevention of switching noise. ・+20dB to -20dB (1dB step) Bass ・Q=0.5, 1, 1.5, 2 variable ・fo=60, 80, 100, 120Hz ・Possible to use “Advanced switch” at changing gain ・+20dB to -20dB (1dB step) Middle ・Q=0.75, 1, 1.25, 1.5 variable ・fo=500, 1k, 1.5k, 2.5kHz variable ・Possible to use “Advanced switch” when changing gain ・+20dB to -20dB (1dB step) Treble ・Q=0.75, 1.25 variable ・fo=7.5k, 10k, 12.5k, 15kHz variable ・Possible to use “Advanced switch” when changing gain Fader Loudness LPF Level meter ・+15dB to -79dB(1dB step), -∞dB ・Possible to use “Advanced switch” for prevention of switching noise. ・20dB to 0dB(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°) ・I C BUS control ・DC Output 2 www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 20/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS 2. Volume / Fader Volume Attenuation Data (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 (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 -∞ 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 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 © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 21/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS (1) About Level Meter (a) 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. (b) The Way to Reset Level Meter Output Please send reset data through I2C BUS To reset output of level meter : Send D6 = “ 1 “ of select address 02(hex). To cancel output reset of level meter (HOLD)… to Send D6 = “ 0 “ of select address 02(hex). (c) 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 I2C BUS (RESET) I2CBUS 80 10 02 RESET START 40 (HOLD) 80 02 00 Wait time (25msec) HOLD START fin＝40Hz LOUT [ V ] detect ( www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 22/31 t TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS 3. Application Circuit GND SDA SCL 10μ VCC OUTF1 OUTF2 OUTR1 OUTR2 OUTS1 OUTS2 LOUT 0.1μ 10μ 21 20 19 18 17 Fader★ 22 10μ Fader★ 23 10μ Fader★ 24 10μ 10μ 16 MUTE 10μ 15 14 13 VCC GND I2C BUS LOGIC Fader★ Fader★ Fader ■Fader Gain:+15dB to -79dB/1dB step Gain:+15dB～-79ｄB/1dB step ★no pop noise ■LPF fc=55/85/120/160Hz Loudness ■Loudness Gain: 20dB to 0dB/1dB step 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 to -20dB/1dB step Gain：+20dB～-20dB/1dB ★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 to -79dB/1dB step Gain：+15dB～-79dB/1dB step ★no pop noise ■Input Gain Gain: +20dB to 0dB/1dB step Gain：+20dB～0dB/1dB step ★no pop noise LPF ★Loudness ★3 Band P-EQ (Tone control) ★Volume/Mute Level meter ★Input Gain Input selector (4 single-end and 1 stereo ISO) GND ISO amp Unit R : [Ω] C : [F] GND ISO amp VCC/2 100k 1 2 10μ 100k 3 2.2μ Single1 100k 4 2.2μ 100k 5 2.2μ Single2 250k 6 2.2μ 250k 7 2.2μ 250k 8 10μ GND Isolation 250k 10 9 2.2μ 250k 1μ Single3 250k 11 1μ 250k 12 1μ 1μ Single4 Notes on wiring ① Please connect the decoupling capacitor of a power supply in the shortest distance as much as possible to GND. ② GND lines should be one-point connected. ③ Wiring pattern of Digital should be away from that of analog unit and crosstalk is not acceptable. ④ Lines of SCL and SDA of I2C BUS should not be parallel if possible. The lines should be shielded, if they are adjacent to each other. ⑤ Analog input lines should not be parallel if possible. The lines should be shielded if they are adjacent to each other. www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 23/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Power Dissipation About the thermal design of the IC Characteristics of an IC are greatly affected by the temperature at which it is used. Exceeding absolute maximum ratings may degrade and destroy the device. 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 SSOP-A24 Power Dissipation : Pd (W) 1.5 Measurement condition: ROHM Standard board board Size : 70 x 70 x 1.6(mm3) material : A FR4 grass epoxy board (3% or less of copper foil area) 1.0W 1.0 θja = 125 °C/W 0.5 0.0 0 25 50 75 85 100 125 150 Ambient Temperature : Ta (°C) Figure 24. 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 © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 24/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS I/O Equivalent Circuits Pin No. Pin Name Pin Voltage Equivalent Circuit Pin Description A terminal for signal input. The input impedance is 100kΩ(typ). VCC 2 A1 3 A2 4 B1 5 B2 4.25 100K GND A terminal for signal input. The input impedance is 250kΩ(typ). VCC 6 CP1 7 CN 8 CP2 9 D1 10 D2 11 E1 12 E2 4.25 250k GND A terminal for external compulsory mute. If terminal voltage is High level, the mute is OFF. If the terminal voltage is Low level, the Mute is ON. VCC 13 MUTE － 1.65V GND A terminal for Fader and Subwoofer output. VCC 16 OUTS1 17 OUTR2 18 OUTR1 19 OUTF2 20 OUTF1 4.25 GND The values in the pin explanation and input/output equivalent circuit are for reference purposes only. It is not a guaranteed value. www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 25/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS I/O Equivalent Circuits – continued Pin No. Pin Name Pin Voltage Equivalent Circuit Pin Description Power supply terminal. 21 VCC 8.5 A terminal for clock input of I2C BUS communication. VCC 22 SCL － 1.65V GND A terminal for data input of I2C BUS communication. VCC 23 SDA － 1.65V GND Ground terminal. 24 GND 0 Voltage for reference bias of analog signal system. The simple precharge circuit and simple discharge circuit for an external capacitor are built in. VCC 50k 1 FIL 4.25 50k GND The values in the pin explanation and input/output equivalent circuit are for reference purposes only. It is not a guaranteed value. www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 26/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Operational Notes 1. Reverse Connection of Power Supply Connecting the power supply in reverse polarity can damage the IC. Take precautions against reverse polarity when connecting the power supply, such as mounting an external diode between the power supply and the IC’s power supply pins. 2. Power Supply Lines Design the PCB layout pattern to provide low impedance supply lines. Separate the ground and supply lines of the digital and analog blocks to prevent noise in the ground and supply lines of the digital block from affecting the analog block. Furthermore, connect a capacitor to ground at all power supply pins. Consider the effect of temperature and aging on the capacitance value when using electrolytic capacitors. 3. Ground Voltage Ensure that no pins are at a voltage below that of the ground pin at any time, even during transient condition. 4. Ground Wiring Pattern When using both small-signal and large-current ground traces, the two ground traces should be routed separately but connected to a single ground at the reference point of the application board to avoid fluctuations in the small-signal ground caused by large currents. Also ensure that the ground traces of external components do not cause variations on the ground voltage. The ground lines must be as short and thick as possible to reduce line impedance. 5. Thermal Consideration Should by any chance the power dissipation rating be exceeded the rise in temperature of the chip may result in deterioration of the properties of the chip. In case of exceeding this absolute maximum rating, increase the board size and copper area to prevent exceeding the Pd rating. 6. Recommended Operating Conditions These conditions represent a range within which the expected characteristics of the IC can be approximately obtained. The electrical characteristics are guaranteed under the conditions of each parameter. 7. Inrush Current When power is first supplied to the IC, it is possible that the internal logic may be unstable and inrush current may flow instantaneously due to the internal powering sequence and delays, especially if the IC has more than one power supply. Therefore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and routing of connections. 8. Operation Under Strong Electromagnetic Field Operating the IC in the presence of a strong electromagnetic field may cause the IC to malfunction. 9. Testing on Application Boards When testing the IC on an application board, connecting a capacitor directly to a low-impedance output pin may subject the IC to stress. Always discharge capacitors completely after each process or step. The IC’s power supply should always be turned off completely before connecting or removing it from the test setup during the inspection process. To prevent damage from static discharge, ground the IC during assembly and use similar precautions during transport and storage. 10. Inter-pin Short and Mounting Errors Ensure that the direction and position are correct when mounting the IC on the PCB. Incorrect mounting may result in damaging the IC. Avoid nearby pins being shorted to each other especially to ground, power supply and output pin. Inter-pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment) and unintentional solder bridge deposited in between pins during assembly to name a few. 11. Unused Input Pins Input pins of an IC are often connected to the gate of a MOS transistor. The gate has extremely high impedance and extremely low capacitance. If left unconnected, the electric field from the outside can easily charge it. The small charge acquired in this way is enough to produce a significant effect on the conduction through the transistor and cause unexpected operation of the IC. So unless otherwise specified, unused input pins should be connected to the power supply or ground line. www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 27/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Operational Notes – continued 12. Regarding the Input Pin of the IC This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them isolated. P-N junctions are formed at the intersection of the P layers with the N layers of other elements, creating a parasitic diode or transistor. For example (refer to figure below): When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode. When GND > Pin B, the P-N junction operates as a parasitic transistor. Parasitic diodes inevitably occur in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical damage. Therefore, conditions that cause these diodes to operate, such as applying a voltage lower than the GND voltage to an input pin (and thus to the P substrate) should be avoided. Resistor Transistor (NPN) Pin A Pin B C E Pin A N P+ P N N P+ N Pin B B Parasitic Elements N P+ N P N P+ B N C E Parasitic Elements P Substrate P Substrate GND GND Parasitic Elements GND Parasitic Elements GND N Region close-by Figure 25. Example of monolithic IC structure 13. About a Signal Input Part (a) About Input Coupling Capacitor Constant Value In the input signal terminal, please decide the constant value of the input coupling capacitor C(F) that would be sufficient to form an RC characterized HPF with input impedance R IN(Ω) inside the IC. G〔dB〕 C〔F〕 0 RIN 〔Ω〕 A(f) SSH f〔Hz〕 INPUT A f 2 fCRIN 2 2 1 2 fCRIN (b) About the Input Selector SHORT SHORT mode is the command which makes switch SSH =ON of input selector part so that the input impedance RIN of all terminals becomes small. Switch SSH is OFF when SHORT command is not selected. The constant time brought about by the small resistance inside and the capacitor outside the LSI becomes small when this command is used. The charge time of the capacitor becomes short. Since SHORT mode turns ON the switch of SSH and makes it low impedance, please use it at no signal condition. 14. About Mute Terminal(Pin 13) when power supply is OFF There should be no applied voltage across the Mute terminal (Pin 13) when power-supply is OFF. A resistor (about 2.2kΩ) should be connected in series to Mute terminal in case a voltage is supplied to Mute terminal. (Please refer Application Circuit Diagram.) www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 28/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Ordering Information B D 3 7 5 Part Number 2 4 F S - Package FS: SSOP-A24 E2 Packaging and forming specification E2: Embossed tape and reel Marking Diagram SSOP-A24(TOP VIEW) Part Number Marking BD37524FS LOT Number 1PIN MARK www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 29/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Physical Dimension, Tape and Reel Information Package Name www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 SSOP-A24 30/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 BD37524FS Revision History Date Revision 16.Dec.2015 001 Changes New Release www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 31/31 TSZ02201-0C2C0E100490-1-2 16.Dec.2015 Rev.001 Datasheet Notice Precaution on using ROHM Products 1. Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment, OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you (Note 1) , transport intend to use our Products in devices requiring extremely high reliability (such as medical equipment equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance. Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific Applications. (Note1) Medical Equipment Classification of the Specific Applications JAPAN USA EU CHINA CLASSⅢ CLASSⅡb CLASSⅢ CLASSⅢ CLASSⅣ CLASSⅢ 2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which a failure or malfunction of our Products may cause. The following are examples of safety measures: [a] Installation of protection circuits or other protective devices to improve system safety [b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. Our Products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any special or extraordinary environments or conditions. If you intend to use our Products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents [b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust [c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves [e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items [f] Sealing or coating our Products with resin or other coating materials [g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] Use of the Products in places subject to dew condensation 4. The Products are not subject to radiation-proof design. 5. Please verify and confirm characteristics of the final or mounted products in using the Products. 6. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied, confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect product performance and reliability. 7. De-rate Power Dissipation depending on ambient temperature. When used in sealed area, confirm that it is the use in the range that does not exceed the maximum junction temperature. 8. Confirm that operation temperature is within the specified range described in the product specification. 9. ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in this document. Precaution for Mounting / Circuit board design 1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product performance and reliability. 2. In principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method must be used on a through hole mount products. If the flow soldering method is preferred on a surface-mount products, please consult with the ROHM representative in advance. For details, please refer to ROHM Mounting specification Notice-PGA-E © 2015 ROHM Co., Ltd. All rights reserved. Rev.002 Datasheet Precautions Regarding Application Examples and External Circuits 1. If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the characteristics of the Products and external components, including transient characteristics, as well as static characteristics. 2. You agree that application notes, reference designs, and associated data and information contained in this document are presented only as guidance for Products use. Therefore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. Precaution for Electrostatic This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron, isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control). Precaution for Storage / Transportation 1. Product performance and soldered connections may deteriorate if the Products are stored in the places where: [a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [b] the temperature or humidity exceeds those recommended by ROHM [c] the Products are exposed to direct sunshine or condensation [d] the Products are exposed to high Electrostatic 2. Even under ROHM recommended storage condition, solderability of products out of recommended storage time period may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is exceeding the recommended storage time period. 3. Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of which storage time is exceeding the recommended storage time period. Precaution for Product Label QR code printed on ROHM Products label is for ROHM’s internal use only. Precaution for Disposition When disposing Products please dispose them properly using an authorized industry waste company. Precaution for Foreign Exchange and Foreign Trade act Since concerned goods might be fallen under listed items of export control prescribed by Foreign exchange and Foreign trade act, please consult with ROHM in case of export. Precaution Regarding Intellectual Property Rights 1. All information and data including but not limited to application example contained in this document is for reference only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. 2. ROHM shall not have any obligations where the claims, actions or demands arising from the combination of the Products with other articles such as components, circuits, systems or external equipment (including software). 3. No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any third parties with respect to the Products or the information contained in this document. Provided, however, that ROHM will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to manufacture or sell products containing the Products, subject to the terms and conditions herein. Other Precaution 1. This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM. 2. The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of ROHM. 3. In no event shall you use in any way whatsoever the Products and the related technical information contained in the Products or this document for any military purposes, including but not limited to, the development of mass-destruction weapons. 4. The proper names of companies or products described in this document are trademarks or registered trademarks of ROHM, its affiliated companies or third parties. Notice-PGA-E © 2015 ROHM Co., Ltd. All rights reserved. Rev.002 Datasheet General Precaution 1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents. ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny ROHM’s Products against warning, caution or note contained in this document. 2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior notice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM sale s representative. 3. The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. Notice – WE © 2015 ROHM Co., Ltd. All rights reserved. Rev.001 Datasheet BD37524FS - Web Page Buy Distribution Inventory Part Number Package Unit Quantity Minimum Package Quantity Packing Type Constitution Materials List RoHS BD37524FS SSOP-A24 2000 2000 Taping inquiry Yes