BD3861FS Audio ICs Audio sound controller BD3861FS The BD3861FS is an audio sound controller IC for micro-component stereo systems. Tone and volume can be controlled easily by two-line serial control from micro-controller. zApplications Micro-component stereo systems, radio cassette players and mini-component stereo systems zFeatures 1) Built-in volume, tone (bass, middle and treble), input gain amplifier and input selector. 2) The volume control of resistance ladder type allows the low distortion and low noise in Bi-CMOS process. 3) Two-line serial interface. 4) The built-in input gain amplifier reduces the needs of external input, and this IC is suitable for space-saving design. 5) Residual noise can be reduced by separating the front stage volume control from the rear stage volume control. zAbsolute maximum ratings (Ta=25°C) Parameter Symbol Limits Unit Power supply voltage VCC 10 V Power dissipation Pd 800∗ mW Operating temperature Topr −25 to +75 °C Storage temperature Tstg −55 to +150 °C ∗Reduced by 6.4mW for each increase in Ta of 1°C over 25°C. zRecommended operating conditions (Ta=25°C) Parameter Power supply voltage Symbol Min. Typ. Max. Unit VCC 6.5 − 9.5 V 1/13 BD3861FS Audio ICs GOUT1 GOUT2 VOL2 VOL1 TRE1 TRE2 MID22 MID21 MID12 MID11 BASS12 BASS11 OUT1 BASS22 BASS21 OUT2 zBlock diagram 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Treble2 fC=10kHz Middle2 f0=1kHz Middle1 f0=1kHz + − VCC/2 Treble1 fC=10kHz + − 0dB~ −70dB Bass1 f0=90Hz Bass2 f0=90Hz VCC/2 0dB~ −59dB 0dB~ −59dB VCC/2 VCC/2 − + − + VCC/2 VCC/2 VCC/2 VCC/2 − + 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k 12k 24k VCC/2 Logic VCC 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 A1 A2 B1 B2 C1 C2 D1 D2 E1 E2 MIC FIL GND DATA CLK VCC 100k 1 2/13 BD3861FS Audio ICs zPin equivalent circuit and description Pin No. Pin name Pin voltage Equivalent circuit Pin description VCC 1 2 3 4 5 6 7 8 A1 A2 B1 B2 C1 C2 D1 D2 A pin for inputting a sound signal. It is suitable for input of CD, MD, tuner and tape. Connect this pin to a front stage circuit through a coupling capacitor. VCC/2 25k 25k GND VCC 9 E1 VCC/2 10 A pin for inputting a sound signal. It is suitable for input from outside of the pin. 25k E2 25k GND VCC 24k 12k 11 MIC VCC/2 A pin for microphone input. 100k GND VCC 40k 12 FIL VCC/2 Voltage for power supply of signal system. VCC/2 40k GND 3/13 BD3861FS Audio ICs Pin No. Pin name Pin voltage Equivalent circuit Pin description VCC 17 OUT2 A pin for outputting a sound signal. Connect this pin to a rear stage circuit through a coupling capacitor. VCC/2 20 OUT1 GND VCC 18 BASS21 A pin for setting central frequency (fo) of bass and for setting gain. VCC/2 21 BASS11 GND VCC 19 BASS22 A pin for setting central frequency (fo) of bass and for setting gain. VCC/2 22 BASS12 GND VCC 23 MID11 A pin for setting central frequency (fo) of middle and for setting gain. VCC/2 25 MID21 GND 4/13 BD3861FS Audio ICs Pin No. Pin name Pin voltage Equivalent circuit Pin description VCC 24 MID12 A pin for setting central frequency (fo) of middle and for setting gain. VCC/2 26 MID22 GND VCC 27 TRE2 A pin for setting cut-off frequency (fc) of treble and for setting gain. VCC/2 28 TRE1 GND VCC 29 VOL1 A pin for inputting sound signal into input volume control. The input impedance is 36kΩ (upon Typ.). VCC/2 30 VOL2 GND VCC 31 GOUT2 40k VCC/2 32 A pin for outputting input gain. GOUT1 GND 5/13 BD3861FS Audio ICs Pin No. Pin name Pin voltage Equivalent circuit Pin description VCC 14 DATA 2k A pin for inputting a serial control data. − 15 CLK GND 16 VCC VCC − Power supply pin. 13 GND 0V − A ground pin. 6/13 BD3861FS Audio ICs zElectrical characteristics (Unless specified particularly, VCC=9V, f=1kHz, VIN=1Vrms, Rg=600Ω, RL=10kΩ, Ta=25°C, INPUT Gain=0dB, VOL=0dB, Bass, Middle, Treble=0dB) Measurement circuit is Fig.1. Parameter Symbol Min. Typ. Max. Select address/Serial data (HEX notation) SW No. Conditions Unit 1/4 2/5 3/8 7 8 1 1 − 2 1 9/10 11/12 1 2 3 02 01 4-1 4-2 5-1 5-2 Measurement point <TOTAL> IQ Circuit current − 13.0 26.0 mA Without signal GV=20log(O1/VIN) GV −1.5 0.0 1.5 dB Total harmonic distortion THD − 0.02 0.08 % Maximum output voltage VOM 2.0 2.5 − Vrms Maximum noise voltage VNO − 8.0 15.0 Cross-talk between channels CT − −80 −70 dB Rg=0kΩ, IHF−A GV6 5 6 7 dB VIN=200mVrms −1 ∗1 +1 dB VIN=200mVrms From 0 to 10dB ∗2 +1.5 dB Output voltage gain 1 2 00 05 0D 03 0B 1 2 2 2 2 1 2 00 02 01 05 0D 03 0B VIN=2Vrms 400~30kHz BPF 1 2 2 2 2 1 2 00 02 01 05 0D 03 0B THD=1% 1 2 2 2 2 1 2 00 02 01 05 0D 03 0B 1 1 − 2 2 1 2 00 02 01 05 0D 03 0B 2 2 1 2 00 02 01 05 0D 03 0B GV=20log(O2/VIN) µVrms Rg=0kΩ, IHF−A CT=20log(O2/O1) CT=20log(O1/O2) 1 2/1 2/− 1/2 −/2 I O1 O2 O1 O2 O1 O2 O1 O2 O2 O1 <INPUT> 6dBSW gain Input voltage gain1 ∗ Gvmaxl1 Input voltage gain2 ∗ Gvmaxl2 −1.5 GV6=20log(G1/VIN) 2 2 2 2 1 1 00 02 11 05 0D 03 0B 1 2 2 2 2 1 1 00 02 01 ∗3 A5 0D 03 0B G1 Gvmaxl1=20log(G1/VIN) VIN=200mVrms From 12 to 20dB Gvmaxl1=20log(G2/VIN) 1 2 2 2 2 1 1 00 02 01 ∗4 0D 03 0B F5 G1 Gvmaxl1=20log(G1/VIN) Gvmaxl1=20log(G2/VIN) Input gain switch step Gvmaxlst − 2 − dB From 0 to 20dB 1 2 2 2 2 1 1 00 02 01 − INPUT total harmonic distortion THDI − 0.02 0.08 % VIN=2Vrms 400~30kHz BPF 1 2 2 2 2 1 1 00 02 01 05 0D 03 0B INPUT maximum output voltage VOMI 2.0 2.5 − dB THD=1% 1 2 2 2 2 1 1 00 02 01 05 0D 03 0B 1 2 2 2 2 1 1 00 02 81 05 0D 03 0B 1 2 1 2 2 1 1 00 02 01 05 0D 03 0B 5 2 2 2 2 1 1 00 02 29 05 0D 03 0B 1 1 − 2 2 2 1 00 ∗7 01 1A 05 0D 03 0B 1 1 − 2 2 2 1 00 ∗8 01 7A 05 0D 03 0B Cross-talk between selectors CS − Input resistance RI 35.0 GRE − "E" input SW attenuation G1 1 GV6=20log(G2/VIN) −80.0 −70.0 dB 50.0 65.0 kΩ −20.0 −15.0 dB GRE=20log(G2/VIN) Rg=0kΩ, IHF−A CS=20log(G1/VIN) CS=20log(G2/VIN) RI=51k×VR1/ (VIN-VR1) RI=51k×VR2/ (VIN-VR2) GRE=20log(G1/VIN) 0D 03 0B G2 G2 G2 G1 G2 G1 G2 G1 G2 G1 G2 VR1 VR2 G1 G2 <INPUT Volume> GIV1=20log(O1/VIN) Input Volume Gain1 ∗ GIV1 −2 ∗5 +2 dB From 0 to −50dB Input Volume Gain2 ∗ GIV2 −3 ∗6 +3 dB From −54 to −70dB Volume switch step1 GIVst1 − 2 − dB From 0 to −50dB 1 1 − 2 2 2 1 00 − 01 05 0D 03 0B Volume switch step2 GIVst2 − 4 − dB From −54 to −70dB 1 1 − 2 2 2 1 00 − 01 05 0D 03 0B MUTE level GminI − − −90.0 dB IHF−A 1 1 − 2 2 2 1 00 FA 01 05 0D 03 0B GOV −1 ∗9 +1 dB From 0 to −59dB 1 1 − 2 2 2 1 ∗10 02 DC 01 05 0D 03 0B GOVst − 1 − dB From 0 to −59dB 1 1 − 2 2 2 1 02 01 05 0D 03 0B GminO − − −90.0 dB IHF−A 1 1 − 2 2 2 1 FC 02 01 05 0D 03 0B GIV1=20log(O2/VIN) GIV2=20log(O1/VIN) GIV2=20log(O2/VIN) GminI=20log(O1/VIN) GminI=20log(O2/VIN) O1 O2 O1 O2 O1 O2 O1 O2 O1 O2 <OUTPUT Volume> Output Volume Gain OUTPUT switch step MUTE level ∗ GOV=20log(O1/VIN) GOV=20log(O2/VIN) GminO=20log(O1/VIN) GminO=20log(O2/VIN) − O1 O2 O1 O2 O1 O2 ∗ It shows a specified value at the deviation from the setting value. ∗1 0.2.4.6.8.10dB ∗2 12.14.16.18.20dB ∗3 Setting 10dB ∗4 Setting 20dB ∗5 From 0 to −50dB −2dB/STEP ∗6 From −54 to −70dB −4dB/STEP ∗7 Setting −50dB ∗8 Setting −70dB ∗9 From 0 to −59dB −1dB/STEP ∗10 Setting −59dB 7/13 BD3861FS Audio ICs Parameter Symbol Min. Typ. Max. Unit Select address/Serial data (HEX notation) SW No. Conditions 1/4 2/5 3/8 7 8 9/10 11/12 1 2 3 1 2 2 2 2 1 2 1 2 2 2 2 1 1 2 2 2 2 1 2 2 2 1 2 2 1 2 1 4-1 4-2 5-1 5-2 00 02 01 05 ED 03 0B 2 00 02 01 05 FD 03 0B 1 2 00 02 01 05 2 1 2 00 02 01 05 0D E3 0B 2 2 1 2 00 02 01 05 0D F3 0B 2 2 2 1 2 00 02 01 05 0D 2 2 2 2 1 2 00 02 01 05 0D 03 EB 1 2 2 2 2 1 2 00 02 01 05 0D 03 FB 1 2 2 2 2 1 2 00 02 01 05 0D 03 1 1 − 1 2 1 2 00 02 01 05 0D 03 0B Measurement point <BASS> GBB=20log(O1/VIN) Maximum Bass boost gain GBB 12 14 16 dB VIN=200mVrms, f=90Hz Maximum Bass cut gain GBC −16 −14 −12 dB VIN=200mVrms, f=90Hz Bass switch step GBST − 2 − dB VIN=200mVrms, f=90Hz Maximum Middle boost gain GMB 10 12 14 dB VIN=200mVrms Maximum Middle cut gain GMC −14 −12 −10 dB VIN=200mVrms Middle switch step GMST − 2 − dB VIN=200mVrms GTB 10 12 14 dB VIN=200mVrms, f=10kHz GBB=20log(O2/VIN) GBC=20log(O1/VIN) GBC=20log(O2/VIN) − 03 0B O1 O2 O1 O2 O1 O2 <MIDDLE> GMB=20log(O1/VIN) GMB=20log(O2/VIN) GMC=20log(O1/VIN) GMC=20log(O2/VIN) − 0B O1 O2 O1 O2 O1 O2 <TREBLE> Maximum Treble boost gain GTB=20log(O1/VIN) GTB=20log(O2/VIN) GTC=20log(O1/VIN) Maximum Treble cut gain GTC −14 −12 −10 dB VIN=200mVrms, f=10kHz Treble switch step GTST − 2 − dB VIN=200mVrms, f=10kHz GMIC 4.5 6.0 7.5 dB VIN=200mVrms GTC=20log(O2/VIN) − O1 O2 O1 O2 O1 O2 <Microphone amplifier> Microphone voltage gain GMIC=20log(O1/VIN) GMIC=20log(O2/VIN) O1 O2 ∗ It shows a specified value at the deviation from the setting value. 8/13 BD3861FS Audio ICs zMeasurement circuit G1 10k 1 3.3k 3.3k 0.15µ 0.15µ 10µ 47µ O1 10k V ~ 10µ 3.3k 0.15µ 0.15µ 10k SW8 1 I A − VCC=9 O2 2 47µ V ~ 10µ OUT2 17 16 VCC 3.3k 10µ SW7 4.7k 1 2 BASS21 18 CLOCK 15 CLK DATA LATCH BASS22 19 4700p 1234 5 2 14 DATA 4700p 4.7k VR2 1 SW5 SW4 BD3861FS V ~ SW6 2 OUT1 20 13 GND 2 1234 5 2 1 BASS11 21 1 E1 2 9 51k 12 FIL 1 MID21 25 2 D2 SW3 2 BASS12 22 1 8 2 MID22 26 1 D1 10µ G1 7 1 11 MIC 0.015µ 0.015µ TRE2 27 0.015µ 0.015µ C2 10µ 6 SW9 10µ TRE1 28 SW10 C1 SW11 5 SW2 SW1 SW12 10k VOL1 29 10µ B2 10µ 4 10µ VOL2 30 10µ B1 10µ 3 10µ GOUT2 31 10µ A2 10µ 2 10µ GOUT1 32 10µ V ~ V ~ VR1 V ~ A1 51k MID11 23 10 E2 MID12 24 1 Fig.1 9/13 BD3861FS Audio ICs zAttached components External Parts of measurement circuit. (1) Element marked with ∗ • Carbon-film resistor: ±1% • Film capacitor: ±1% • Ceramic capacitor: ±1% (2) Unless specified particularly, use the following external parts: • Carbon-film resistor: ±5% • Film capacitor: ±20% • Electrolytic capacitor: ±20% Notes on wiring (1) GND shall be wired solidly. (2) Wiring pattern of CLK and DATA shall be away from that of analog unit and cross talk shall not be acceptable. (3) Wiring pattern of CLK and DATA of shall not be parallel if possible. They shall be shielded, if they are adjacent to each other. zCircuit operations Specifications for control signal (1) Timing of control signal • Data is read at a leading edge of clock. • Latch is read at a trailing edge of clock. • Be sure to set DATA to LOW after latching. 90% 90% tsc twc CLK ( CLOCK Signal ) 15pin 10% ts thd DATA DATA Signal LATCH Signal 14pin 90% 90% twd DATA 90% 90% 10% 10% twc th tsd thd tsl 90% 90% twl twh DATA 10% 10% thl 10% 90% LATCH Fig.2 Constant of timing chart (Ta=25°C, VCC=9V) Parameter Symbol Min. Typ. Max. Unit "High" input voltage VIH 2.6 − 5.5 V "Low" input voltage VIL 0 − 1.1 V Clock width twc 2.0 − − µs Data width twd 2.0 − − µs Latch width twl 2.0 − − µs "Low" hold width twh 2.0 − − µs Setup time (DATA→CLK) tsd 1.0 − − µs Hold time (CLK→DATA) thd 1.0 − − µs Setup time (CLK→LATCH) tsl 1.0 − − µs Hold time (DATA→LATCH) thl 1.0 − − µs "Low" setup time ts 1.0 − − µs "Low" hold time th 1.0 − − µs 10/13 BD3861FS Audio ICs zApplication example − + 25k 0dB~ −70dB 25k 10µ VCC/2 10µ VCC/2 VCC/2 VCC/2 25k 25k 4700p 4700p Treble2 fC=10kHz VCC/2 VCC/2 C2 10µ 25k 25k Treble1 fC=10kHz 25k 25k 10µ C1 3.3k 0.015µ 0.015µ Middle2 f0=1kHz 25k 25k 10µ D1 25k 25k 10µ D2 3.3k 0.015µ 0.015µ Middle1 f0=1kHz 25k 25k 4.7k 10µ E1 25k 25k 4.7k 10µ E2 3.3k 0.15µ 0.15µ VCC/2 VCC/2 24k 0dB~ −59dB Bass1 f0=90Hz 12k 100k 10µ MIC 47µ OUT1 10µ + − 10µ B2 3.3k 0.15µ 0.15µ Bass2 f0=90Hz 0dB~ −59dB VCC/2 CLOCK Logic DATA LATCH OUT2 10µ VCC + − 25k 25k 10µ B1 − + 25k 10µ A2 − + 25k 10µ A1 17 VCC 16 20 13 18 15 19 14 21 12 22 11 23 10 24 9 25 8 26 7 27 6 29 4 28 5 30 3 31 2 32 1 47µ Fig.3 11/13 BD3861FS Audio ICs zOperation notes 1. About operation voltage supply range Within operation voltage supply range, basic circuit function operation is guaranteed within operation ambient temperature. But please confirm set up of constant and element, voltage set up and temperature set up on use. 2. About operation temperature range If it within recommended operation voltage range, circuit function operation is guaranteed within operation temperature. It corralled to conditions of power dissipation to temperature. Please watch out except condition stipulated by electrical characteristics within the range, It cannot guarantee standard value of electrical characteristics. But it retains original function. 3. About Application circuit Example of application circuit drawing is convinced as recommendable, but please confirm characteristic including above-mentioned notes. At use with modification of external constant, please decide with enough margin considering distribution of this IC, external parts including quiescence characteristics and excessive characteristics. Please note that we have not yet confirmed any concerned patent rights completely. 4. Power-on reset Any circuit to perform initialization in the IC upon power on is not contained. Therefore, be sure to send initial data to all the addresses upon power on. Moreover, be sure to mute the set side until the initial data has been sent. For data setting at the second time or later, necessary address only can be modified. 5. Schmidt circuit This IC has the Schmidt circuit as preventive measures against logic signal input into the DATA (14pin) and CLK (15pin) terminals. Therefore, this IC is not affected so much by noise to a logic signal line. For the “High” voltage for logic control, voltage in a range from 2.6 to 5.5V is available. 6. Setting of input gain Because of the S/N characteristics, it is recommendable to turn ON 6dBSW in input gain in a range between 6 and 20dB (in 2dB increment). 7. Input pin E1 (9pin) and E2 (10pin) Input pin E1 (9pin) and E2 (10pin) has a built-in mute circuit. It is the optimal for the auxiliary input. 8. Microphone terminal If the microphone terminal (11pin) is not used, use this IC in “open” because of the S/N characteristics. 9. Serial control Wire the CLK terminal and DATA terminal taking care not to interfere with an analog signal line. 12/13 BD3861FS Audio ICs zElectrical characteristic curves Gain(dB) Gain(dB) Gain(dB) 3dB Boost Boost fo Boost fo 90Hz 1kHz f(Hz) Cut fc 10kHz f(Hz) Cut f(Hz) Cut 3dB Fig.4 Tone control (Bass) Fig.5 Tone control (Middle) Fig.6 Tone control (Treble) zExternal dimensions (Unit : mm) 1 16 5.4±0.2 17 0.8 0.36±0.1 0.15±0.1 1.8±0.1 0.11 7.8±0.3 13.6±0.2 32 0.3Min. 0.15 SSOP-A32 13/13 Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document use silicon as a basic material. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction. Appendix1-Rev1.0