LC75373E Electronic Volume Control Stereo Systems Overview
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Ordering number EN5588
LC75373E
Electronic Volume Control Stereo Systems
Overview
LC75373E electronic volume control that implement volume, balance, fader, bass/treble super bass, loudness, input switching, input/output level control functions with minimal number external components.
Package Dimensions
unit: 3148-QFP44MA
[LC75373E]
Functions
Volume: Provides positions, from 1-dB steps) balance function implemented controlling left right channels independently. Fader: This function attenuate either rear front outputs over positions. (From 2-dB steps, from 5-dB step, from 10-dB steps, Bass/treble: Forms NF-type tone control circuit with addition external capacitors. base treble controls each have positions. Input gain: input signal amplified from +18.75 1.25 steps. Output gain: output selected fader output. Input switch: signal selected from four inputs each left right channels. Super bass: position super bass controlled steps.
SANYO: QIP44MA
trademark SANYO ELECTRIC CO., LTD. SANYO's original format addresses controlled SANYO.
Features
On-chip buffer amplifiers minimum external components. Built-in reference voltage generation circuit Serial data input: Supports format communication with system controller.
Specifications
Absolute Maximum Ratings 25°C,
Parameter Maximum supply voltage Maximum input voltage Operating temperature Storage temperature Symbol Topr Tstg Conditions Ratings +125 Unit
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
22798HA (OT) 5588-1/21
LC75373E Allowable Operating Ranges 25°C,
Parameter Supply voltage Input high-level voltage Input low-level voltage Input voltage amplitude Input pulse width Setup time Hold time Operating frequency Symbol tsetup thold fopg LVRIN, RVRIN, LFIN, RFIN, LSIN, RSIN Conditions 10.5 Unit Vp-p
Electrical Characteristics 25°C,
Parameter [Input Block] Maximum input gain Step resolution [Output Block] Maximum output gain [Volume Control Block] Step resolution Step error [Fader Volume Block] step step step Step error Output load resistance [Bass/Treble Control Block] Bass control range Treble control range [Super Bass Block (Type GEQ)] Control range Step resolution [Super Bass Block (Type Control range Step resolution [Overall Characteristics] Total harmonic distortion Crosstalk Output maximum attenuation Output noise voltage Input high-level current Input low-level current Vrms, kHz, settings flat overall Vrms, kHz, settings flat overall, Vrms, kHz, main volume settings flat overall (IHF-A), settings flat overall (DIN-AUDIO), 0.003 80.5 0.01 Crange ATstep Max. boost +2.0 Crange ATstep Max. boost +1.7 Gbass Gtre Max. boost/cut Max. boost/cut ±10.5 ±10.5 ATerr step step ATstep ATerr step step Gout +6.5 Gstep +18.75 +1.25 Symbol Conditions Unit
Step resolution
ATstep
Note: Values parenthesis targets will fixed after evaluation.
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LC75373E Equivalent Circuit Block Diagram
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LC75373E Sample Application Circuit When super bass circuit (Type GEQ) used
Unit (capacitance:
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LC75373E When super bass circuit (Type used
Unit (capacitance: Unit (resistance:
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LC75373E Assignment
view
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LC75373E Functions
Symbol Function Note
Vref
voltage generation block. capacitor must connected between Vref suppress power supply ripple.
LROUT LFOUT RROUT RFOUT Fader outputs. front rear systems attenuated independently.
LFIN RFIN
Fader inputs Must driven from low-impedance circuits.
LTOUT RTOUT
Tone control outputs
Connections bass treble compensation capacitors tone control circuit Connect high-band compensation capacitors between Connect low-band compensation capacitors between
Super bass compensation capacitors
LVRIN RVRIN
4-dB volume control inputs These inputs must driven from low-impedance circuits.
Continued next page. 5588-7/21
LC75373E
Continued from preceding page.
Symbol Function Note
LSELO RSELO
Outputs from input selector
Power supply connection Ground Chip enable. Data latched internally point this goes from high low. analog switches operate that point. Data transfer enabled when this high. Signal inputs
LCOM RCOM LSIN RSIN RSOUT LSOUT
Inputs serial data clock used control.
1-dB block common outputs Super bass inputs These inputs must driven low-impedance circuits.
Super bass outputs
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LC75373E Input Block Equivalent Circuit
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LC75373E Main Volume Control Equivalent Circuit
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LC75373E Tone Control Block Equivalent Circuit
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LC75373E Super Bass Block Equivalent Circuit
Note: Concerning super bass switching control super bass (Type GEQ) relatively large value SW1.on (Note that this switch should position only STEP data sent.) SW2.on SW3.off SW4.off super bass (Type relatively small value without problem SW1.off SW2.off SW3.on SW4.on
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LC75373E Super Bass Block Circuit External Capacitor Calculation Example LC75373E external capacitors function structural elements simulated inductances. This section presents equivalent circuits formulas used calculate desired center frequencies. Simulated Inductance Equivalent Circuit
Sample Calculations Specifications: Center frequency: maximum boost: Qmax 1.05
Determine sharpness simulated inductance itself. (RT2 Rfeed) Qmax 2.6481
Determine 0.60 (µF)
Determine 0.014 (µF)
super bass block equivalent circuit diagram values internal resistors.
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LC75373E Fader Volume Control Block Equivalent Circuit
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LC75373E Control System Timing Data Format LC75373E controlled applying serial data stipulated format pins. data consists bits, which bits chip address bits data.
Note: bits test bits must Concerning super bass switching super bass relatively large value super bass relatively small value without problem
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LC75373E
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LC75373E
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LC75373E
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LC75373E
Super bass Type GEQ, control characteristics
Super bass Type control characteristics
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LC75373E
Total harmonic distortion, THD-%
THD-Output level characteristics THD-Output level characteristics
THD-Output level characteristics THD-Input level characteristics
Total harmonic distortion, THD-% Total harmonic distortion, THD-%
VDD=8V, VSS=0V 80-kHz low-pass weighting overall
f=1kHz
Total harmonic distortion, THD-% Total harmonic distortion, THD-%
VDD=8V, VSS=0V 80-kHz low-pass weighting overall
f=1kHz
0.01
0.01
Output level,VO-dBV Outut leve, VO-dBV
Gain block 10dB block block TONE block Super bass block Fader block meter Gain block 10dB block
Input level, VIN-dBV Outut leve, -dBV
block TONE block Super bass block Fader block meter
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LC75373E Usage Notes states internal analog switches undefined when power first applied. external muting circuit other technique mute outputs until correct control data been LC75373E. Either cover lines connected pins with ground pattern shielded cable those lines prevent high-frequency digital signals those lines from entering analog system.
products described contained herein intended surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment like, failure which directly indirectly cause injury, death property loss. Anyone purchasing products described contained herein above-mentioned shall: Accept full responsibility indemnify defend SANYO ELECTRIC CO., LTD., affiliates, subsidiaries distributors their officers employees, jointly severally, against claims litigation damages, cost expenses associated with such use: impose responsibility fault negligence which cited such claim litigation SANYO ELECTRIC CO., LTD., affiliates, subsidiaries distributors their officers employees jointly severally. Information (including circuit diagrams circuit parameters) herein example only; guaranteed volume production. SANYO believes information herein accurate reliable, guarantees made implied regarding infringements intellectual property rights other rights third parties. This catalog provides information February, 1998. Specifications information herein subject change without notice. 5588-21/21
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