Ordering number : ENN*7378 CMOS LSI LC75347E Six-Channel Single-Chip Electronic Volume Control System Preliminary Package Dimensions Functions unit: mm • Volume: 0 to –95 dB (in 1 dB steps) and –∞, for a total of 97 positions. Each of the six input channels can be controlled independently. • Bass and treble: Each band can be controlled over a ±12 dB range in 2 dB steps. The bass control provides peaking characteristics and the treble control provides shelving characteristics. • Selector: 2-channel input selector • Zero cross: Provides independent zero-cross detection for each of the 6 channels and a timer overflow detection circuit. • External muting: Mute in/mute out function using zerocross detection and dedicated pins. • External output ports: Provides 4 n-channel transistor open-drain outputs. 3148A-QIP44M [LC75347E] 13.2 10.0 10.0 1.0 The LC75347E is a 6-channel 97-step electronic volume control system IC that provides a 2-channel input selector, bass and treble tone controls, external output ports, and a zero-cross volume switching function. • Built-in analog ground reference voltage generator circuit • All settings are controlled by serial data transmitted over a CCB interface. 13.2 Overview 44 1 0.8 0.2 0.35 Features • Built-in buffer amplifiers reduce the number of external components to a minimum. • Fabricated in a silicon-gate CMOS process for minimal noise generation from internal switches. 0.1 2.8max (2.5) (1.0) SANYO: QIP44M • CCB is a trademark of SANYO ELECTRIC CO., LTD. • CCB is SANYO’s original bus format and all the bus addresses are controlled by SANYO. Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein. SANYO Electric Co.,Ltd. Semiconductor Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN D1503TN (OT) No. 7378 -1/17 LC75347E Specifications Absolute Maximum Ratings at Ta = 25°C, VSS = 0 V Parameter Maximum supply voltage Symbol Pin VDD VIN1 max CE, DI, CL, MUTE OUTP1 to OUTP4 VIN2 max FL, FR, RL, RR, C, SBW, FLTON, FRTON, FLIN, FRIN Maximum input voltage Output current Allowable power dissipation Conditions VDD max IOUT Ratings Unit 11 V –0.3 to +11 V VSS – 0.3 to VDD + 0.3 OUTP1 to OUTP4 Ta ≤ 85°C *1. When mounted on a PCB Pdmax 0 to 1 mA 600 mW Operating temperature Topr –40 to +85 °C Storage temperature Tstg –50 to +125 °C *1: PCB dimensions: 76.1 × 114.3 × 1.6 mm, PCB materials: glass epoxy Allowable Operating Ranges at Ta = –40 to +85°C, VSS = 0 V Parameter Supply voltage Symbol Pin Conditions Ratings min typ Unit max VDD VDD 4.5 10.5 V High-level input voltage VIH CL, DI, CE, MUTE OUTP1 to OUTP4 2.5 10.5 V Low-level input voltage VIL CL, DI, CE, MUTE 7.5 ≤ VDD ≤ 10.5 VSS 0.8 4.5 ≤ VDD < 7.5 VSS 0.3 Input amplitude VIN FL, FR, RL, RR, C, SBW, FLTON, FRTON, FLIN, FRIN VSS VDD tøW Input pulse width V Vp-p CL 1 µs Setup time tsetup CL, DI, CE 1 µs Hold time thold CL, DI, CE 1 Operating frequency fopg CL µs 500 kHz Electrical Characteristics at Ta = 25°C, VDD = 9 V, VSS = 0 V Parameter Symbol Pin Conditions Ratings min typ Unit max [Volume and Selector Blocks] Input resistance Rin FL, FR, RL, RR, C, SBW, FLTON, FRTON, FLIN, FRIN 50 kΩ [Treble Band Equalizer Control Block] Control range Geq Step resolution Estep Internal feedback resistance Rfeed max. boost/cut ±10 ±12 ±14 dB 1 2 3 dB 51.7 kΩ [Bass Band Equalizer Control Block] Control range Geq Step resolution Estep Internal feedback resistance Rfeed max. boost/cut ±10 ±12 ±14 dB 1 2 3 dB 38.9 kΩ [Output Port Block] Low-level output voltage V0 OUTP1 to OUTP4 Rh = 10 kΩ, Vd = 5 V 0.5 V Continued on next page. No. 7378 -2/17 LC75347E Continued from preceding page. Parameter Symbol Ratings Conditions min typ max Unit [Overall Characteristics] Total harmonic distortion (RL, RR, C and SBW inputs, direct output) THD1 VIN = 1 Vrms, f = 1 kHz, 80 kHz LPF Flat overall 0.001 0.01 Total harmonic distortion (FL and FR inputs, direct output) THD2 VIN = 1 Vrms, f = 1 kHz, 80 kHz LPF Flat overall FL and FR selected, direct output 0.002 0.01 THD3 VIN = 1 Vrms, f = 1 kHz, 80 kHz LPF Flat overall FLTON and FRTON selected, output after passing though tone controls. 0.003 Total harmonic distortion (FLTON and FRTON inputs, FLOUT and FROUT outputs) Output noise voltage (RL, RR, C and SBW inputs, direct output) 80 kHz LPF, Rg = 1 kΩ All controls flat overall VN1 Output noise voltage (FL and FR inputs, direct output) VN3 Characteristics at maximum attenuation 2.5 80 kHz LPF, Rg = 1 kΩ All controls flat overall 7 A-WIGHT, Rg = 1 kΩ All controls flat overall 3 80 kHz LPF, Rg = 1 kΩ All controls flat overall 9 A-WIGHT, Rg = 1 kΩ All controls flat overall 4 µV VIN = 1 Vrms, f = 1 kHz, 80 kHz LPF All controls flat overall Vomin 0.01 6 A-WIGHT, Rg = 1 kΩ All controls flat overall VN2 Output noise voltage (FLTON and FRTON inputs, FLOUT and FROUT outputs) % Crosstalk CT VIN = 1 Vrms, f = 1 kHz, Rg = 1 kΩ All controls flat overall –95 dB 80 Current drain IDD VDD – VSS = +9 V High-level input current IIH CL, DI, CE, MUTE: VIN = 10.5 V,VDD = 10.5 V Low-level input current IIL CL, DI, CE, MUTE: VIN = 0 V,VDD = 10.5 V dB 38 mA 10 –10 µA µA FRTON TRE2 BASS21 BASS22 BASS23 FL NC FR SELR FRIN VREF Pin Assignment 33 32 31 30 29 28 27 26 25 24 23 FLTON 34 22 C MUTE 35 21 NC TIM 36 20 RL VDD 37 19 NC CL 38 18 RR LC75347E QIP44M DI 39 CE 40 17 NC 16 SBW VSS 41 15 NC 1 2 3 4 5 6 7 8 9 10 11 SELL FLIN NC FLOUT FROUT COUT 12 RLOUT BASS13 OUTP2 44 BASS12 13 RROUT BASS11 OUTP3 43 TRE1 14 SBWOUT OUTP1 OUTP4 42 Top view NC: No Connect No. 7378 -3/17 LC75347E VREF 19 18 17 16 15 13 14 2.2 µF RLOUT 2.2 µF 2.2 µF RROUT NC SBW 1 µF NC RR 1 µF NC 20 21 SBWOUT 22 22 µF 1 µF RL C 1 µF NC Equivalent Circuit/Application Circuit Example 12 20 kΩ 23 20 kΩ 2.2 µF 11 SELR 2.2 µF 24 1 µF FRIN COUT 10 FROUT 25 2.2 µF 1 µF 9 FR 26 NC 27 FLOUT 8 NC 50 kΩ 1 µF 7 1 µF 6 FLIN SELL 50 kΩ 28 BASS23 29 NO SIGNAL TIMER 2700 pF 32 33 0.1 µF 0.1 µF BASS11 3 50 kΩ 2 1 1 µF FRTON 5V TRE1 OUTP1 OUTP2 10 kΩ 44 OUTP3 10 kΩ 43 OUTP4 5V 10 kΩ 42 41 VSS µCOM 40 CE 39 DI 38 CL 37 VDD 36 0.033 µF MUTE 35 1 µF 34 1 MΩ TIM 47 kΩ FLTON TRE2 50 kΩ BASS12 6.5 kΩ 2700 pF 31 BASS21 4 BASS13 10 kΩ 0.1 µF 6.5 kΩ LOGIC CIRCUIT 30 CCB INTERFACE BASS22 5 CONTROL CIRCUIT 0.1 µF ZERO-CROSS DETECTOR FL No. 7378 -4/17 LC75347E Control System Timing and Data Format The stipulated serial data must be applied to the CL, DI, and CE pins to control the LC75347E. The data consists of 80 bits, of which 8 bits are address and 72 bits are data. CE DI B0 B1 B2 B3 A0 A1 A2 A3 D0 D1 D2 D3 D4 D5 D65 D66 D67 D68 D69 D70 D71 CL 1 µs min CE 1 µs min 1 µs min 1 µs min 1 µs min CL DI 1 µs ≤ TDEST • Address Code (B0 to A3) This IC has an 8-bit address code and can be used with the same specifications as other Sanyo CCB serial bus ICs. Address code (LSB) (82HEX) B0 B1 B2 B3 A0 A1 A2 A3 0 1 0 0 0 0 0 1 No. 7378 -5/17 LC75347E • Control Code Allocations Volume Control D0 D1 D2 D3 D4 D5 D6 D7 SBW setting D8 D9 D10 D11 D12 D13 D14 D15 RR setting D16 D17 D18 D19 D20 D21 D22 D23 RL setting D24 D25 D26 D27 D28 D29 D30 D31 C setting D32 D33 D34 D35 D36 D37 D38 D39 FRIN setting D40 D41 D42 D43 D44 D45 D46 D47 FLIN setting 0 0 0 0 0 0 0 0 0 dB 1 0 0 0 0 0 0 0 –1 dB 0 1 0 0 0 0 0 0 –2 dB 1 1 0 0 0 0 0 0 –3 dB 0 0 1 0 0 0 0 0 –4 dB 1 0 1 0 0 0 0 0 –5 dB 0 1 1 0 0 0 0 0 –6 dB 1 1 1 0 0 0 0 0 –7 dB 0 0 0 1 0 0 0 0 –8 dB 1 0 0 1 0 0 0 0 –9 dB 0 1 0 1 0 0 0 0 –10 dB 1 1 0 1 0 0 0 0 –11 dB 0 0 1 1 0 0 0 0 –12 dB 1 0 1 1 0 0 0 0 –13 dB 0 1 1 1 0 0 0 0 –14 dB 1 1 1 1 0 0 0 0 –15 dB 0 0 0 0 1 0 0 0 –16 dB 1 0 0 0 1 0 0 0 –17 dB 0 1 0 0 1 0 0 0 –18 dB 1 1 0 0 1 0 0 0 –19 dB 0 0 1 0 1 0 0 0 –20 dB 1 0 1 0 1 0 0 0 –21 dB 0 1 1 0 1 0 0 0 –22 dB 1 1 1 0 1 0 0 0 –23 dB 0 0 0 1 1 0 0 0 –24 dB 1 0 0 1 1 0 0 0 –25 dB 0 1 0 1 1 0 0 0 –26 dB 1 1 0 1 1 0 0 0 –27 dB 0 0 1 1 1 0 0 0 –28 dB 1 0 1 1 1 0 0 0 –29 dB 0 1 1 1 1 0 0 0 –30 dB 1 1 1 1 1 0 0 0 –31 dB 0 0 0 0 0 1 0 0 –32 dB 1 0 0 0 0 1 0 0 –33 dB 0 1 0 0 0 1 0 0 –34 dB 1 1 0 0 0 1 0 0 –35 dB 0 0 1 0 0 1 0 0 –36 dB 1 0 1 0 0 1 0 0 –37 dB 0 1 1 0 0 1 0 0 –38 dB 1 1 1 0 0 1 0 0 –39 dB 0 0 0 1 0 1 0 0 –40 dB 1 0 0 1 0 1 0 0 –41 dB 0 1 0 1 0 1 0 0 –42 dB 1 1 0 1 0 1 0 0 –43 dB 0 0 1 1 0 1 0 0 –44 dB 1 0 1 1 0 1 0 0 –45 dB 0 1 1 1 0 1 0 0 –46 dB Continued on next page. No. 7378 -6/17 LC75347E Continued from preceding page. D0 D1 D2 D3 D4 D5 D6 D7 SBW setting D8 D9 D10 D11 D12 D13 D14 D15 RR setting D16 D17 D18 D19 D20 D21 D22 D23 RL setting D24 D25 D26 D27 D28 D29 D30 D31 C setting D32 D33 D34 D35 D36 D37 D38 D39 FRIN setting D40 D41 D42 D43 D44 D45 D46 D47 FLIN setting 1 1 1 1 0 1 0 0 –47 dB 0 0 0 0 1 1 0 0 –48 dB 1 0 0 0 1 1 0 0 –49 dB 0 1 0 0 1 1 0 0 –50 dB 1 1 0 0 1 1 0 0 –51 dB 0 0 1 0 1 1 0 0 –52 dB 1 0 1 0 1 1 0 0 –53 dB 0 1 1 0 1 1 0 0 –54 dB 1 1 1 0 1 1 0 0 –55 dB 0 0 0 1 1 1 0 0 –56 dB 1 0 0 1 1 1 0 0 –57 dB 0 1 0 1 1 1 0 0 –58 dB 1 1 0 1 1 1 0 0 –59 dB 0 0 1 1 1 1 0 0 –60 dB 1 0 1 1 1 1 0 0 –61 dB 0 1 1 1 1 1 0 0 –62 dB 1 1 1 1 1 1 0 0 –63 dB 0 0 0 0 0 0 1 0 –64 dB 1 0 0 0 0 0 1 0 –65 dB 0 1 0 0 0 0 1 0 –66 dB 1 1 0 0 0 0 1 0 –67 dB 0 0 1 0 0 0 1 0 –68 dB 1 0 1 0 0 0 1 0 –69 dB 0 1 1 0 0 0 1 0 –70 dB 1 1 1 0 0 0 1 0 –71 dB 0 0 0 1 0 0 1 0 –72 dB 1 0 0 1 0 0 1 0 –73 dB 0 1 0 1 0 0 1 0 –74 dB 1 1 0 1 0 0 1 0 –75 dB 0 0 1 1 0 0 1 0 –76 dB 1 0 1 1 0 0 1 0 –77 dB 0 1 1 1 0 0 1 0 –78 dB 1 1 1 1 0 0 1 0 –79 dB 0 0 0 0 1 0 1 0 –80 dB 1 0 0 0 1 0 1 0 –81 dB 0 1 0 0 1 0 1 0 –82 dB 1 1 0 0 1 0 1 0 –83 dB 0 0 1 0 1 0 1 0 –84 dB 1 0 1 0 1 0 1 0 –85 dB 0 1 1 0 1 0 1 0 –86 dB 1 1 1 0 1 0 1 0 –87 dB 0 0 0 1 1 0 1 0 –88 dB 1 0 0 1 1 0 1 0 –89 dB 0 1 0 1 1 0 1 0 –90 dB 1 1 0 1 1 0 1 0 –91 dB 0 0 1 1 1 0 1 0 –92 dB 1 0 1 1 1 0 1 0 –93 dB 0 1 1 1 1 0 1 0 –94 dB 1 1 1 1 1 0 1 0 –95 dB 1 1 1 1 1 1 1 0 –∞ No. 7378 -7/17 LC75347E Zero cross control D48 SBW setting D49 RR setting D50 RL setting D51 C setting D52 FRIN setting D53 Operation FLIN setting 0 Zero cross operation 1 Zero cross operation is disabled (This setting takes effect on the fall of CE.) Tone Switch Selection D54 D55 0 0 The analog switches are set so that FL and FR bypass the tone circuit. Setting 1 0 The analog switches are set so that FL is connected to, and FR bypass the tone circuit. 0 1 The analog switches are set so that FR is connected to, and FL bypass the tone circuit. 1 1 The analog switches are set so that FL and FR are connected to the tone circuit. Bass Treble D56 D57 D58 D59 FLTON setting FRTON setting D60 D61 D62 D63 FLTON setting FRTON setting 0 1 1 0 +12 dB 0 1 1 0 +12 dB 1 0 1 0 +10 dB 1 0 1 0 +10 dB 0 0 1 0 +8 dB 0 0 1 0 +8 dB 1 1 0 0 +6 dB 1 1 0 0 +6 dB 0 1 0 0 +4 dB 0 1 0 0 +4 dB 1 0 0 0 +2 dB 1 0 0 0 +2 dB 0 0 0 0 0 dB 0 0 0 0 0 dB 1 0 0 1 –2 dB 1 0 0 1 –2 dB 0 1 0 1 –4 dB 0 1 0 1 –4 dB 1 1 0 1 –6 dB 1 1 0 1 –6 dB 0 0 1 1 –8 dB 0 0 1 1 –8 dB 1 0 1 1 –10 dB 1 0 1 1 –10 dB 0 1 1 1 –12 dB 0 1 1 1 –12 dB Tone Mode D64 D65 0 0 FLTON and FRTON not changed Setting 1 0 Only FLTON changed 0 1 Only FRTON changed 1 1 Both FLTON and FRTON changed Output Ports Setting D66 OUTP1 (VSS: 1, OPEN: 0) D67 OUTP2 (VSS: 1, OPEN: 0) D68 OUTP3 (VSS: 1, OPEN: 0) D69 OUTP4 (VSS: 1, OPEN: 0) Test Mode D70 D71 Setting 0 0 These bits are used for IC testing. They must be set to 0 during normal operation. No. 7378 -8/17 LC75347E Pin Functions Pin No. Pin 7 FLIN 24 FRIN 20 RL 18 RR 22 C 16 SBW 9 FLOUT 10 Function Notes VDD • Volume control inputs FLOUT VDD FROUT FROUT 11 COUT 12 RLOUT 13 RROUT 14 SBWOUT 28 FL 26 FR RLOUT • Volume control outputs RROUT COUT SBWOUT From TONE • Selector volume inputs VDD FL RL 6 SELL 25 SELR • Selector volume outputs VREF SELL SELR VDD VDD • Zero cross circuit timer 36 TIM If a zero cross is not detected during the period from the completion of the data transfer to the point the timer overflows, the control data is enabled forcibly. VDD • 0.5 × VDD voltage generator used for analog ground 23 VREF A capacitor of several ten µF must be connected between VREF and VSS to minimize power supply ripple. VREF 41 VSS • Ground 37 VDD • Power supply • Chip enable 40 CE 39 DI 38 CL Data is written to the internal latch when this pin goes from high to low. The analog switches operate at that time. Data transfer is enabled when CE is high. VDD • Serial data and clock inputs for the control data. Continued on next page. No. 7378 -9/17 LC75347E Continued from preceding page. Pin No. Pin Function Notes VDD • External control mute pin 35 MUTE 34 FLTON 33 FRTON Applying the VSS level to this pin forcibly sets the volume level for all channels to –∞. • Tone control block inputs FLTON FRTON VDD VDD After passing through the tone control circuit, the audio signals are output to the selector amplifier. VREF 3 BASS11 5 BASS13 31 BASS21 29 BASS23 4 BASS12 30 BASS22 VDD VDD • Connections for the capacitors that form the bass filters BASS11 BASS21 BASS13 BASS23 VREF • Connections for the resistors that form the bass filters VDD 2 TRE1 32 TRE2 • Connections for the capacitors that form the treble filters VDD TRE1 TRE2 1 OUTP1 44 OUTP2 43 OUTP3 42 OUTP4 • N-channel transistor open-drain outputs When off, these outputs are in the high-impedance state. OUTP1 OUTP2 OUTP3 OUTP4 8 15 17 19 • Unused pins NC These pins must either be left open or connected to VSS. 21 27 No. 7378 -10/17 LC75347E Internal Equivalent Circuits • Selector, Bass/Treble, VREF Amplifier, Output Ports FLTON SW3 50 VREF SW3 SW4 ±2 dB 8.473 SW4 ±4 dB SW2 6.730 ±6 dB 0.027 5.346 ±0 dB 10.666 ±8 dB ±2 dB 8.473 4.246 ±4 dB 6.730 ±10 dB ±6 dB 5.346 3.373 ±8 dB 4.246 ±12 dB ±10 dB SW1 3.373 12.840 ±12 dB FRTON is identical. Units (Resistance: kΩ) ±0 dB SW2 10.666 SW1 TRE1 6.5 BASS11 Total= 51.674 VREF BASS12 BASS13 Total= 38.861 SELL FL 50 VREF For boost, set switches 1 and 3 to the on position, for cut, set switches 2 and 4 to the on position, and for 0 dB, set switches 2, 3 and 0 dB switch to the on position. VDD VREF1 OUTP1 20 VREF VREF2 20 OUTP2 to 4 are identical. VREF3 No. 7378 -11/17 LC75347E • Volume Block Total resistance: 50 kΩ (Parallel resistors) FLIN FLOUT 0dB R1= 5434 R28= R55= 243 –1dB R2= 4845 R29= 216 R30= 193 R31= 172 R32= 153 R33= 137 R34= 122 R35= 108 R36= 97 R37= 86 R38= 77 R39= 68 R40= 61 R41= 55 R42= 48 R43= 86 R44= 77 R45= 69 R46= 61 R47= 55 R48= 49 R49= 86 R50= 77 R51= 69 R52= 61 R53= 55 R54= 49 –2dB R3= 4319 967 R17= 862 R18= 768 R19= 685 R20= 610 R21= 544 R22= 485 R23= 432 R24= 385 R25= 343 R26= 306 R27= 273 R60= 49 R61= 86 R62= 78 R63= 69 R64= 62 R65= 55 R66= 49 R67= 86 R68= 78 R69= 69 R70= 62 R86= 78 R87= 69 R88= 62 R89= 55 R90= 49 R91= 87 R92= 78 R93= 69 R94= 62 R71= 55 R95= 55 R72= 49 R96= 450 R73= 87 R74= 78 R75= 69 R76= 62 R77= 55 R78= 49 –84dB –85dB –86dB –87dB –88dB –89dB –90dB –91dB –92dB –69dB –93dB –70dB –94dB –95dB –71dB –72dB –∞ dB –73dB –74dB –75dB –76dB –77dB –51dB –25dB 87 –68dB –50dB –24dB R85= –83dB –67dB –49dB –23dB 49 –66dB –48dB –22dB R84= –82dB –65dB –47dB –21dB 55 –64dB –46dB –20dB R83= –81dB –63dB –45dB –19dB 62 –62dB –44dB –18dB R82= –80dB –61dB –43dB –17dB 69 –60dB –42dB –16dB R81= –79dB –59dB –41dB –15dB R16= 78 –58dB –40dB –14dB R15= 1085 55 –39dB –13dB R14= 1218 R59= –38dB –12dB R13= 1366 R80= –57dB –37dB –11dB R12= 1533 61 –36dB –10dB R11= 1720 R58= –35dB –9dB R10= 1930 87 –56dB –34dB –8dB R9= 2165 69 –33dB –7dB R8= 2429 R57= –32dB –6dB R7= 2726 77 –31dB –5dB R6= 3058 R56= –30dB –4dB R5= 3431 R79= –55dB –29dB –3dB R4= 3850 86 –28dB –78dB –52dB –26dB –53dB –27dB –54dB R97 794 R98 796 R99 798 R100 R101 R102 R103 R104 R105 800 802 804 806 808 810 Resistor units: Ω FRIN, RL, RR, C and SBW are identical. VREF No. 7378 -12/17 LC75347E Calculating the Equalizer External Component Values 1. Bass Band Circuit Here we show the equivalent circuit and the formulas for calculating the capacitor and resistor values for a center frequency of 100 Hz. • Bass band equivalent circuit R1 C1 R2 C2 R3 • Sample calculation Specifications: Center frequency, f0 = 100 Hz Gain at maximum boost: G = 12 dB Assume R1 = 27 Ω, R2 = 38,834 Ω, and C1 = C2 = C. (1) Determine R3 from the fact that G = 12 dB. R2 G+12dB = 20 × LOG10 1 + 2R3 + R1 R2 G/20 R3 = (10 –1) –R1 = 38834 – 27 (3.981 – 1) 2 2 ≠ 6500 Ω (2) Determine C from the fact that the center frequency, f0, is 100 Hz. f0 = 1 2π (R1 + R2) R3C1C2 1 C= = 2πf0 (R1 + R2) R3 1 2π × 100 (38834 + 27) × 6500 ≠ 0.1 µF (3) Determine Q. Q= (R1 + R2) R3 2R3 + R1 · 1 ≠ 1.22 (R1 + R2) R3 No. 7378 -13/17 LC75347E 2. Treble Band Circuit The treble band circuit can provide shelving characteristics. Here we present the equivalent circuit when the circuit is providing boost and the circuit calculation formulas. • Treble band equivalent circuit R1 C R2 • Sample calculation Specifications: Set frequency, f = 26,000 Hz Gain at maximum boost: G+12 dB = 12 dB Assume R1 = 12,840 Ω and R2 = 38,834 Ω. Substituting the above values into the following formulas allows us to solve for C. R2 G = 20 × LOG10 1 + R12 + (1/ωC)2 1 C = 2πf 2 R2 – R12 10G/20 – 1 1 = 2π26000 38834 ≠ 2700 (pF) 2 – 12840 2 3.98 – 1 No. 7378 -14/17 LC75347E Usage Notes 1. Data Transmission after Power is First Applied The states of the internal analog switches are undefined when power is first applied. Applications should set up the initial data immediately after power is applied (after VDD rises above 4.5 V). Applications should also mute the outputs until the data has been set up and the outputs are stable. To establish the states of the internal latches, set the bits D64 and D65 to 1 in the first data transferred after power is first applied. 2. Zero Cross Switching Control Zero cross switching is used by setting up data in which the zero cross control bits specify zero cross detection mode (by setting bits D48 to D53 to 0) and transfer that data. Since these control bits are latched first, immediately after the data is transferred, that is, on the fall of the CE signal, zero cross control can be performed with a single data transfer operation when updating the volume control settings. If the zero cross control bits specify zero cross detection disabled mode (by setting bits D48 to D53 to 1), the volume is switched on the fall of the CE signal at the end of the data transfer. 3. Zero Cross Timer Setting When the input signal is less than the detection sensitivity of the zero cross comparator, or if only a low-frequency signal is being input, the state where the IC does not detect a zero cross will continue and the data will not be latched. The zero cross timer allows applications to set a time at which data will be latched forcibly if the state where no zero cross is detected continues. For example, to set a time of 25 ms: T = 0.69CR Since the internal pull-up resistor is about 1 MΩ: C= 25 × 10–3 0.69 × 1.0 × 106 0.036 µF Applications usually set a time in the range 10 to 50 ms. 4. Notes on Serial Data Transfer Cover the CL, DI, and CE pin signal lines with the ground pattern, or use shielded cables for these signals so that the high-frequency digital signals transmitted on these lines do not enter the analog signal system. No. 7378 -15/17 LC75347E Distortion vs. Frequency Characteristics (1) Volume Control Step Characteristics 0 3 VDD = 9 V VIN = 0 dBV f = 1 kHz --10 --20 Distortion — % --30 Output — dB FROUT tone VDD = 9 V 2 --40 --50 --60 --70 0.01 7 5 VIN = --10 dBV 3 2 --80 VIN = 0 dBV --90 --100 --100 --90 --80 --70 --60 --50 --40 --30 --20 Step — dB --10 0.001 10 0 2 3 5 7 100 Distortion vs. Frequency Characteristics (2) 5 7 1k 2 3 5 7 10k 2 3 5 7100k ILC05490 Distortion vs. Input Level Characteristics (1) 2 7 SBWOUT output VDD = 9 V 5 2 3 Frequency, f — Hz ILC05489 FROUT tone output VDD = 9 V 0.1 7 5 2 Distortion — % Distortion — % 3 VIN= --10 dBV 0.001 VIN = 0 dBV 7 3 2 0.01 7 z 5 10 3 kH 1 kHz 2 5 3 10 2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k 0.001 7 --40 2 3 5 7100k ILC05491 Frequency, f — Hz --20 --10 0 10 Input level — dBV Distortion vs. Input Level Characteristics (2) 0.1 ILC05492 Distortion vs. Supply Voltage (1) 3 SBWOUT output VDD = 9 V 7 5 --30 FROUT tone output VDD = 9 V 2 3 0.01 Distortion — % Distortion — % 2 0.01 7 5 3 Hz 2 k 10 1 kH 0.001 z 7 5 5 10 kH 3 z kH z 1 2 0.001 7 3 --40 5 --35 --30 --25 --20 --15 --10 --5 0 5 Input level — dBV 7 10 9 10 11 Supply voltage — V 0 SBWOUT output VDD = 9 V 5 8 ILC05493 Distortion vs. Supply Voltage (2) 7 12 ILC05494 Bass Tone Control Characteristics VDD = 9 V VIN = --20 dBV --5 --10 10 2 Output level — dBV 3 Distortion — % 7 kH z 0.001 1 kHz 7 --15 --20 --25 --30 5 --35 3 6 7 8 9 10 Supply voltage — V 11 12 ILC05495 --40 10 2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k Frequency, f — Hz 2 3 5 7100k ILC05496 No. 7378 -16/17 LC75347E 0 Treble Tone Control Characteristics VDD = 9 V VIN = --20 dBV --5 Output level — dBV --10 --15 --20 --25 --30 --35 --40 10 2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k Frequency, f — Hz 2 3 5 7100k ILC05497 Zero Cross Circuit Off Zero Cross Circuit On VDD = 9 V VIN = 0 dBV Setting: 0 dBV → mute VDD = 9 V VIN = 0 dBV Setting: 0 dBV → mute SBWOUT output SBWOUT output RROUT output RROUT output CE input CE input ILC05498 ILC05499 Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer’s products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer’s products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification” for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of December, 2003. Specifications and information herein are subject to change without notice. PS No. 7378 -17/17