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| Multimedia ICs Vocal fader IC with input selector BH3810FS The BH3810FS is a vocal fader IC that is serial control compatible. It has mode switching that also includes a voice multiplexing mode, a five-input selector, a gain selector and other such features, which can all be controlled serially. Eight open-collector terminals and two tri-state terminals are provided on the chip to facilitate control by other ICs. *Applications systems, CD radio cassette players, TVs and car stereos. Component stereo *Featureslow-pass filter can perform vocal fader func1) Built-in tion (erasing of vocals from commercially available music software) using just one chip. 2) Serial control can be used to switch between vocal fader, through, multiplex, and mute modes. 3) Built-in gain selector allows selection of gain from 6dB to 20dB in 2dB steps. 4) Five-channel input selector. 5) Mic. mixing amplifier with mute function. Key controller input also provided. 6) SSOP-A32 pin package. *Absolute maximum ratings (Ta = 25C) Parameter Applied voltages Power dissipation Operating temperature Storage temperature Maximum open collector voltage Symbol VDD VEE Pd Topr Tstg VOP Limits + 5.5 - 4.5 850 - 40 ~ + 85 - 55 ~ + 125 14 Unit V mW C C V Reduced by 8.5mW for each increase in Ta of 1C over 25C , when mounted on a 50mm x 50mm x 1.6mm board. *Recommended operating conditions (Ta = 25C) Parameter Power supply voltage Symbol VDD VEE Limits 4.0 ~ 5.3 - 4.3 ~ - 3.0 Unit V V 1 *Block diagram 6 LPF 7 MIC--IN + --LE 5 - 2 TK FK 27 26 PORT1 ~ 8 R 7k 6dB (0dB) 8dB (2dB) 10dB (4dB) 12dB (6dB) 14dB (8dB) VF 16dB (10dB) 18dB (12dB) 10k 15k 10k 14 SCK 20dB (14dB) 30k 50k 30k 50k 20k VDD 11 VDD OUTPUT--R 25 24 PORT1 23 PORT2 22 PORT3 21 PORT4 20 PORT5 19 PORT6 18 PORT7 VDD PORT9 ~ 10 17 PORT8 16 PORT9 15 PORT10 50k 7k Multimedia ICs INPUT--RE 28 --RD 29 --RC 30 10k 20k L --RB 31 --RA 32 50k 50k 50k 50k 50k 50k 20dB (14dB) DIGITAL CONTROL 13 SI 12 DGND 50k 50k 50k 50k 50k 50k 18dB (12dB) 16dB (10dB) 14dB (8dB) 12dB (6dB) 10dB (4dB) 8dB (2dB) 6dB (0dB) INPUT--LA 1 --LB 2 --LC 3 7k 7k + - 10 AGND --LD 4 VEE 9 VEE 8 BH3810FS OUTPUT--L Multimedia ICs BH3810FS notes, VDD = *Electrical characteristics (unless otherwise 150mV,Ta = 25C,100k)5V, VEE = - 4V, G = 14dB, f =1kHz, and RL = Rg = 600, VIN = Parameter Symbol IQ1 + Quiescent current IQ1 - IQ2 + IQ2 - Maximum output voltage L, R gain Low-frequency gain Microphone gain Crosstalk Mute attenuation Vocal suppression ratio Total harmonic distortion Noise level Mode switch output DC differential Input impedance Input selector crosstalk Port output current "L" output voltage "H" output leakage current Tri-state "H" output voltage Tri-state "L" output voltage SI pin source current (pin 13) SCK pin source current (pin 14) Vom GVT GVF GVM CT MU SV THD VN Min. -- -- -- -- 1.5 11 8 5 54 60 15 -- -- -- 35 80 5.0 -- -- 4.5 -- -- -- Typ. 4.5 4.1 10.0 7.6 2.2 14 11 8 64 80 20 0.004 15 0 50 -- 12 0.15 0 4.85 0.05 0.4 0.2 Max. 10.0 10.0 20.0 20.0 -- 17 14 11 -- -- -- 0.05 22 18 65 -- -- 0.5 2.0 -- 0.5 10 10 Unit mA mA mA mA Vrms dB dB dB dB dB dB % Vrms mV k dB mA V A V V A A Conditions Through mode VDD current Through mode VEE current Through mode D9 to D16 data1 Through mode D9 to D16 data1 THD = 1%, through mode Through mode Vocal fader mode, f = 100Hz -- f = 1kHz, through mode f = 1kHz, mute mode or input mute Vocal fader mode, f = 1kHz VO = 1Vrms, through mode, BW 400Hz to 30kHz Rg = 0, DIN AUDIO DCB RIN CTIN IPMax. VOL IOH VSOH VSOL ISI ISCK Between each mode with key controller on Pins 1 to 5, pins 26, pins 28 to 32 f = 1kHz Pins 17 to 24, 0.5V between PORT terminal and GND voltage = 0.5V Pins 17 to 27, IOL = 5mA Pins 17 to 24, 13V applied to collector Pins 15 to 16, Io = 1mA Pins 15 to 16, Io = 1mA When SI pin is at DGND potential When SCK pin is at DGND potential Measured using a Matsushita VP-9690A (average value detector, effective value display) DIN AUDIO filter. Operating specifications: same phase for the input and output signals. Not designed for radiation resistance. 3 *Measurement circuit DATA LATCH CLOCK 4 13V 21 21 21 21 21 2 1 S8 S9 S10 S11 S12 S14 21 21 21 21 21 21 21 2 Multimedia ICs 1 A V V 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 INPUT TK FK OUTPUT PORT PORT PORT PORT PORT PORT PORT PORT A V V V V A A A A A A V V 1 S20 2 -RA -RB -RC -RD -RE -R 1 2 3 4 5 6 7 8 2 S2 RL 100k Rg = 600 1 Fig. 1 INPUT -LA LPF -IN -LB -LC -LD -LE -L VEE AGND VDD DGND SI SCK V MIC OUTPUT 10 50k V PORT PORT 9 V 1 2 S19 0.1F V THD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 A A 10k V 10k S0 S21 S22 S16 V S17 S1 S3 S5 21 21 2 21 S6 21 21 S4 S7 S13 1 2 1 2 1 2 1 2 VDD 1 2 1 2 1 A A 1mA 1 2 1mA S18 BH3810FS Multimedia ICs BH3810FS *Circuit operation format (1) About the data Data format MSB 24 bits total LSB Data D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 D19 D20 D21 D22 D23 17pin 18pin 19pin 20pin 21pin 22pin 23pin 24pin 15pin 16pin Description Input selector Input selector Mode selector Open collector port Tri-state port 2bit Tri-state port 2bit Mic. mute Chip select Bit number 3bit 3bit 3bit 8bit 1bit 2bit Fig.2 * Address is "00" D22 0 At power on Gain selector Mode selector Mic Key controller Input selector 6dB Through mode Mute OFF OFF LA, RA D23 0 Output port: current attraction OFF Tri-state port: Low Output port: open collector Data Pin name 0 1 Tri-state PORT9 (16pin) D19 0 0 1 1 D20 0 1 0 1 Mode LOW OPEN OPEN HI PORT10 (15pin) D17 0 0 1 1 D18 0 1 0 1 Mode LOW OPEN OPEN HI D16 PORT 1 (24pin) D15 PORT 2 (23pin) D14 PORT 3 (22pin) D13 PORT 4 (21pin) D12 PORT 5 (20pin) D11 PORT 6 (19pin) D10 PORT 7 (18pin) D9 PORT 8 (17pin) Current sink OFF Current sink ON D19, D20 Mic. mute D21 0 1 Mic. ON Mic. MUTE Mode D17, D18 5 Multimedia ICs BH3810FS Input selector 3 bits D0 to D2 D0 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 D2 0 1 0 1 0 1 0 1 MUTE MUTE MUTE INPUT--LA, INPUT--RA INPUT--LB, INPUT--RB INPUT--LC, INPUT--RC INPUT--LD, INPUT--RD INPUT--LE, INPUT--RE Mode Gain selector 3 bits D3 to D5 D3 0 0 0 0 1 1 1 1 D4 0 0 1 1 0 0 1 1 D5 0 1 0 1 0 1 0 1 Gain select 6dB 8dB 10dB 12dB 14dB 16dB 18dB 20dB The gain is the total gain from input to output. Mode selector 3 bits D6 to D8 D6 0 0 0 0 1 1 1 1 D7 0 0 1 1 0 0 1 1 D8 0 1 0 1 0 1 0 1 LOUT MUTE VOCALFADE L L FK FK FK FK ROUT MUTE VOCALFADE L R FK FK FK FK TK MUTE VOCALFADE L L L+R R L VOCALFADE Mute Vocal fader L channel Through Key controller, L + R Key controller, R channel Key controller, L channel Key controller, vocal fader Mode 6 Multimedia ICs (2) Timing chart Serial data timing (timing for the IC terminals) BH3810FS 90% SCK (clock signal) 10% tw tw tsu tw (DATA) SI (DATA signal, LATCH signal) 90% th ts tw (LATCH) 90% D22 10% D23 10% When LATCH is "H", the DATA signal is forced "L" internally. The read decision for the DATA signal (SI) is made by the signal when the CLOCK signal rises. The read decision for the LATCH signal (SI) is made by the signal when the LATCH signal itself rises. A "L" must follow at the end of each signal to wait for the next signal. Fig.3 *Timing chart constants (Ta = 25C, VDD = 5V and VEE = - 4V) Parameter H input voltage M input voltage L input voltage Minimum clock width Minimum data width Minimum latch width Setup time (DATA to CLK) Hold time (CLK to DATA) Setup time (DATA, CLK to LATCH) Symbol VIH VIM VIL tw tw (DATA) tw (LATCH) tsu th ts Min. 4.0 2.0 - 0.3 2.0 4.0 2.0 1.0 1.0 1.0 Typ. 5.0 2.5 0 -- -- -- -- -- -- Max. 6.0 3.0 1.0 -- -- -- -- -- -- Unit V V V s s s s s s If the voltage between VDD and DGND changes, the values above will change. 7 *Application circuit 8 key--con 10k 10k 10k 10k 10k 10k 10k 10k 32 31 30 28 TK -RB -RC -RD -R 1 2 -RE 3 4 6 7 5 8 27 26 25 24 23 29 INPUT -RA 22 21 20 19 17 18 FK OUTPUT PORT PORT PORT PORT PORT PORT PORT PORT POWER AMP INPUT MIC OUTPUT -LB -LE 5 6 7 8 9 LPF -IN -L 2 3 4 -LC -LD VEE AGND VDD DGND 10 11 12 SI 13 SCK 14 -LA 1 PORT PORT 10 15 9 16 VEE 0.1F 10k VDD 10k GND DATA LATCH CLOCK Multimedia ICs MD CD TUNER Fig. 4 TAPE AUX + MICROPHONE --con BH3810FS Multimedia ICs BH3810FS *Operation notes the application circuit design, but recommend that you thoroughly check its characteristics in actu(1) We guarantee al use. If you change any of the external component values, check both the static and transient characteristics of the circuit, and allow sufficient margin in your selections to take into account variations in the components and ICs. Note that Rohm has not fully investigated patent rights regarding this product. (2) The vocal fader function The effect of the vocal fader is realized by negating the same-phase components. In the bass region, the first-stage low-pass filter leaves the source sound as is, even for the same-phase components. Therefore, depending on the music, the effect may be small. (3) The low-pass filter that leaves the vocal fader bass The low-pass filter is formed by connecting a capacitor to pin 6. A 20k resistor (design value) and this capacitor set the cutoff frequency. 1 (Hz) fc = 2CR The optional attenuation of the first-stage low-pass filter frequency is: A (f) = 20 log 1 1 + (2fCR) 2 (dB) f: frequency C: external capacitor R: 20k (design value) (4) AGND (pin 10) and DGND (pin 12) AGND is the ground for the IC's internal analog circuits, and DGND is the ground for the internal ports 1 to 10. Connect the two grounds externally. (5) Switching noise If you are troubled by switching noise that occurs when the input selector, gain selector, or mode selector are switched, use muting, or some other appropriate countermeasure. (6) Serial control The LATCH and DATA serial signals are received on the same terminal, and the signals are differentiated by voltage level. A diode and resistor are connected to perform a conversion to logic voltage (0 to 5V). The threshold values will change depending on the external components, so select them carefully. If the signals are not being received very well, connect a capacitor of about 100pF between the SI terminal (pin 13), and the DGND terminal (pin 12). *External dimensions (Units: mm) 13.6 0.2 32 7.8 0.3 5.4 0.2 17 1 1.8 0.1 16 0.11 0.8 0.36 0.1 0.3Min. 0.15 SSOP-A32 0.15 0.1 9 |
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