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 •Component stereo systems, CD radio cassette players, TVs and car stereos. •1)Features Built-in low-pass filter can perform vocal fader func- 4) Five-channel input selector. 5) Mic. mixing amplifier with mute function. Key controller input also provided. 6) SSOP-A32 pin package. 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. •Absolute maximum ratings (Ta = 25°C) Parameter Symbol Applied voltages + 5.5 VEE – 4.5 Unit V Pd 850∗ mW Operating temperature Topr – 40 ~ + 85 °C Storage temperature Tstg – 55 ~ + 125 °C Maximum open collector voltage VOP Power dissipation ∗ Limits VDD 14 V Reduced by 8.5mW for each increase in Ta of 1°C over 25°C , when mounted on a 50mm × 50mm × 1.6mm board. •Recommended operating conditions (Ta = 25°C) Parameter Power supply voltage Symbol Limits Unit VDD 4.0 ~ 5.3 V VEE – 4.3 ~ – 3.0 V 1 1 2 3 4 5 INPUT—LA —LB —LC —LD —LE —RA 32 —RB 31 —RC 30 —RD 29 INPUT—RE 28 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 6dB (0dB) 8dB (2dB) 10dB (4dB) 12dB (6dB) 14dB (8dB) 16dB (10dB) 18dB (12dB) 20dB (14dB) 20dB (14dB) 18dB (12dB) 16dB (10dB) 14dB (8dB) 12dB (6dB) 10dB (4dB) 8dB (2dB) 6dB (0dB) 20k 7k PORT9 ~ 10 VDD PORT1 ~ 8 8 VEE – + VDD DIGITAL CONTROL OUTPUT—L 7k 50k 7 50k 15k MIC—IN 50k 10k 6 30k 30k 10k VF L 7k 7k 25 LPF 20k 10k R OUTPUT—R TK FK – + 2 27 26 9 VEE 10 AGND 11 VDD 12 DGND 13 SI 14 SCK 15 PORT10 16 PORT9 17 PORT8 18 PORT7 19 PORT6 20 PORT5 21 PORT4 22 PORT3 23 PORT2 24 PORT1 Multimedia ICs BH3810FS •Block diagram Multimedia ICs BH3810FS otherwise notes, Ta = 25°C, V = 5V, V •Electrical characteristics (unless Rg = 600Ω, V = 150mV, and R = 100kΩ) DD IN Parameter Quiescent current = – 4V, G = 14dB, f =1kHz, EE L Symbol Min. Typ. Max. Unit IQ1 + — 4.5 10.0 mA Through mode VDD current Conditions IQ1 – — 4.1 10.0 mA Through mode VEE current IQ2 + — 10.0 20.0 mA Through mode D9 to D16 data1 IQ2 – — 7.6 20.0 mA Through mode D9 to D16 data1 Maximum output voltage Vom 1.5 2.2 — Vrms THD = 1%, through mode L, R gain GVT 11 14 17 dB Through mode Low-frequency gain GVF 8 11 14 dB Vocal fader mode, f = 100Hz Microphone gain GVM 5 8 11 dB Crosstalk CT 54 64 — dB f = 1kHz, through mode Mute attenuation MU 60 80 — dB f = 1kHz, mute mode or input mute Vocal suppression ratio SV 15 20 — dB Vocal fader mode, f = 1kHz THD — 0.004 0.05 % VO = 1Vrms, through mode, BW 400Hz to 30kHz VN — 15 22 µVrms ∆DCB — 0 18 mV Between each mode with key controller on Input impedance RIN 35 50 65 kΩ Pins 1 to 5, pins 26, pins 28 to 32 Input selector crosstalk CTIN 80 — — dB f = 1kHz Port output current IPMax. 5.0 12 — mA Pins 17 to 24, 0.5V between PORT terminal and GND voltage = 0.5V "L" output voltage VOL — 0.15 0.5 V "H" output leakage current IOH — 0 2.0 µA Pins 17 to 24, 13V applied to collector Tri-state "H" output voltage VSOH 4.5 4.85 — V Pins 15 to 16, Io = 1mA Tri-state "L" output voltage VSOL — 0.05 0.5 V Pins 15 to 16, Io = 1mA ISI — 0.4 10 µA When SI pin is at DGND potential ISCK — 0.2 10 µA When SCK pin is at DGND potential Total harmonic distortion Noise level Mode switch output DC differential SI pin source current (pin 13) SCK pin source current (pin 14) — Rg = 0, DIN AUDIO ∗ Pins 17 to 27, IOL = 5mA ∗ 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. 䊊 Not designed for radiation resistance. 3 4 Rg = 600Ω V 50k V 1 2 S2 1 2 1 S3 S8 2 1 2 1 S4 S9 2 1 2 1 S5 S10 2 1 2 1 S6 S11 2 1 S14 2 1 A V A V 2 1 V 2 1 A 2 1 A 2 1 A 2 1 2 1 S7 -LB -LA INPUT 2 S13 3 -LC 4 -LD 5 -LE -RA -RB -RC -RD -RE INPUT 1 7 -IN 8 -L 1 2 3 4 SI 5 7 8 10 9 1 10k 10k 2 S0 A A 1 2 S21 A 1mA 1mA 2 S22 2 1 A 1 PORT PORT SCK 6 10 11 12 13 14 15 16 2 S1 A 9 VEE AGND VDD DGND MIC OUTPUT -R FK OUTPUT PORT PORT PORT PORT PORT PORT PORT PORT 0.1µF 6 LPF TK 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 S12 2 1 DATA Fig. 1 LATCH 2 1 VDD 2 1 V V A 2 S16 S18 1 V A 2 1 1 2 V 2 S17 V V V 1 1 13V S19 2 2 S20 RL 100k V V THD •Measurement circuit CLOCK 1 Multimedia ICs BH3810FS Multimedia ICs BH3810FS operation •(1)Circuit About the data format Data format MSB Data 24 bits total LSB D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 D19 D20 D21 D22 D23 Description Bit number Input selector Input selector Mode selector 3bit 3bit 3bit 17pin 18pin 19pin 20pin 21pin 22pin 23pin 24pin 15pin 16pin Open collector port Tri-state port Tri-state port 8bit 2bit 2bit Mic. mute Chip select 1bit 2bit Fig.2 • Address is "00" D22 D23 0 0 At power on Output port: current attraction OFF Tri-state port: Low Gain selector 6dB Mode selector Through mode Mic Mute OFF Key controller OFF Input selector LA, RA Output port: open collector Data D16 D15 D14 D13 D12 D11 D10 D9 Pin name PORT 1 (24pin) PORT 2 (23pin) PORT 3 (22pin) PORT 4 (21pin) PORT 5 (20pin) PORT 6 (19pin) PORT 7 (18pin) PORT 8 (17pin) 0 Current sink OFF 1 Current sink ON Tri-state PORT9 (16pin) PORT10 (15pin) D19 D20 D17 D18 0 0 LOW Mode 0 0 LOW 0 1 OPEN 0 1 OPEN 1 0 OPEN 1 0 OPEN 1 1 HI 1 1 HI D19, D20 Mode D17, D18 Mic. mute D21 Mode 0 Mic. ON 1 Mic. MUTE 5 Multimedia ICs BH3810FS Input selector 〈3 bits〉 D0 to D2 D1 D2 0 0 0 MUTE 0 0 1 MUTE 0 1 0 MUTE 0 1 1 INPUT—LA, INPUT—RA 1 0 0 INPUT—LB, INPUT—RB 1 0 1 INPUT—LC, INPUT—RC 1 1 0 INPUT—LD, INPUT—RD 1 1 1 INPUT—LE, INPUT—RE D0 Mode Gain selector 〈3 bits〉 D3 to D5 D3 D4 D5 Gain select 0 0 0 6dB 0 0 1 8dB 0 1 0 10dB 0 1 1 12dB 1 0 0 14dB 1 0 1 16dB 1 1 0 18dB 1 1 1 20dB The gain is the total gain from input to output. Mode selector 〈3 bits〉 D6 to D8 6 D6 D7 D8 LOUT ROUT TK Mode 0 0 0 MUTE MUTE MUTE 0 0 1 VOCALFADE VOCALFADE VOCALFADE 0 1 0 L L L L channel 0 1 1 L R L Through 1 0 0 FK FK L+R 1 0 1 FK FK R Key controller, R channel 1 1 0 FK FK L Key controller, L channel 1 1 1 FK FK VOCALFADE Key controller, vocal fader Mute Vocal fader Key controller, L + R Multimedia ICs BH3810FS (2) Timing chart Serial data timing (timing for the IC terminals) 90% tw SCK (clock signal) tw 10% tsu th ts tw (LATCH) 90% tw (DATA) SI (DATA signal, LATCH signal) 90% D22 D23 10% 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 = 25°C, V DD Parameter = 5V and VEE = – 4V) Symbol Min. Typ. Max. Unit H input voltage VIH 4.0 5.0 6.0 V M input voltage VIM 2.0 2.5 3.0 V L input voltage VIL – 0.3 0 1.0 V Minimum clock width tw 2.0 — — µs Minimum data width tw (DATA) 4.0 — — µs Minimum latch width tw (LATCH) 2.0 — — µs Setup time (DATA to CLK) tsu 1.0 — — µs Hold time (CLK to DATA) th 1.0 — — µs Setup time (DATA, CLK to LATCH) ts 1.0 — — µs ∗ If the voltage between VDD and DGND changes, the values above will change. 7 8 Fig. 4 AUX TAPE TUNER CD MD 32 2 1 MICROPHONE -LB -RB 31 -LA INPUT -RA INPUT 3 -LC -RC 30 4 -LD -RD 29 5 -LE -RE 28 25 24 23 22 21 10k 20 10k 19 10k 18 10k 17 10k 7 6 0.1µF -IN LPF 8 -L MIC OUTPUT -R 2 3 4 9 VEE 10 VDD 10k 10k 12 13 SI 5 14 SCK 6 µ—con 8 15 10 16 9 PORT PORT 7 GND DATA LATCH CLOCK 11 VEE AGND VDD DGND 1 26 10k FK OUTPUT PORT PORT PORT PORT PORT PORT PORT PORT 10k 27 10k TK key—con POWER AMP Multimedia ICs BH3810FS •Application circuit + Multimedia ICs BH3810FS notes •(1)Operation We guarantee the application circuit design, but recommend that you thoroughly check its characteristics in actual 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 20kΩ resistor (design value) and this capacitor set the cutoff frequency. 1 (Hz) fc = 2πCR The optional attenuation of the first-stage low-pass filter frequency is: 1 1 + (2πfCR) 2 A (f) = 20 log f: frequency C: external capacitor R: 20kΩ (design value) (dB) (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) 17 1 16 5.4 ± 0.2 32 0.8 0.36 ± 0.1 0.15 ± 0.1 1.8 ± 0.1 0.11 7.8 ± 0.3 13.6 ± 0.2 0.3Min. 0.15 SSOP-A32 9