LC75371M Overview Stereo Electronic Tone Volume Control

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LC75371M Overview Stereo Electronic Tone Volume Control

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Ordering number EN5348
LC75371M
Overview
Stereo Electronic Tone Volume Control
LC75371M electronic tone/volume control that implement, with minimal external components, volume, balance, fader, bass treble, loudness, input switching, input level controls.
Functions
Volume control: From 1-dB steps plus total settings. Since left right levels independently, this function also used implement balance function. Fader: Attenuates either rear front channels levels. (Provides settings, namely, from 2-dB steps, from 5-dB step, from 10-dB steps, Bass treble controls: Forms NF-type tone control circuit (LUX type) using external capacitors. Provides settings each bass treble controls. Loudness control: loudness function implemented attaching external circuits taps provided from volume control resistor ladder starting -20-dB position. input signal selected from three inputs each left right channels. input signal amplified between 6-dB steps. Serial data input: Supports CCB* format communication with system controller.
Features
Built-in buffer amplifiers allow applications implemented with external components. VDD/2 reference voltage generation circuit provided chip.
trademark SANYO ELECTRIC CO., LTD. SANYO's original format addresses controlled SANYO.
SANYO Semiconductor products described contained herein have specifications that handle applications that require extremely high levels reliability, such life-support systems, aircraft's control systems, other applications whose failure reasonably expected result serious physical and/or material damage. Consult with your SANYO Semiconductor representative nearest before using SANYO Semiconductor products described contained herein such applications. SANYO Semiconductor assumes responsibility equipment failures that result from using products values that exceed, even momentarily, rated values (such maximum ratings, operating condition ranges, other parameters) listed products specifications SANYO Semiconductor products described contained herein.
TOKYO OFFICE Tokyo Bldg., 1-10, Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
53096HA (OT) 5348-1/17
LC75371M Package Dimensions unit (typ) 3204-MFP36S
[LC75371M]
SANYO: MFP36S
Specifications
Absolute Maximum Ratings 25°C,
Parameter Maximum supply voltage Maximum input voltage Allowable power dissipation Operating temperature Storage temperature Symbol Topr Tstg LIN, RIN, LFIN, RFIN, 85°C Conditions Ratings 0.3V +125 Unit
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 LIN, RIN, LFIN, RFIN, Conditions 11.0 Unit Vp-p
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LC75371M Electrical Characteristics 25°C,
Parameter [Input Block] Input resistance Minimum input gain Maximum input gain Step resolution [Volume Control Block] Input resistance Step resolution Step error [Fader Block] Input resistance Rfed LFIN, RFIN step Step resolution ATstep step step Step error Output load resistance [Bass Treble Control Block] Bass control range Treble control range [Overall Characteristics] Total harmonic distortion THD1 THD2 Vrms, kHz, settings flat overall Vrms, kHz, settings flat overall Vrms, kHz, settings flat overall, Vrms, kHz, main volume control Output maximum attenuation Vrms, kHz, main volume control INMUTE settings flat overall (IHF-A), settings flat overall (DIN-AUDIO), tsettings flat overall, test point fader output. 0.045 0.045 22.8 Vrms Gbass Gtre Max. boost/cut Max. boost/cut ±10.5 ±10.5 ATerr step step LFOUT, LROUT, RFOUT, RROUT Rv10 ATstep ATerr step step LIN, RIN: 10-dB steps, loudness 1-dB steps Gstep +16.0 +18.0 +6.0 +20.0 Symbol Conditions Unit
Crosstalk
Output noise voltage Current drain Input high-level current Input low-level current Maximum input level
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LC75371M Equivalent Circuit Block Diagram Sample Application Circuit
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LC75371M Test Circuits Total harmonic distortion
Output noise voltage
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LC75371M Crosstalk
Assignment
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LC75371M Functions
Symbol Function Notes
Vref2
Common main volume control block, fader block, tone control block, gain control block, input switching block. Since capacitor connected between Vref2 becomes residual resistance when volume control maximum attenuation, value this capacitor must selected carefully. voltage applied this must never exceed VDD.
Vref1
VDD/2 voltage generation block. capacitor must connected between Vref1 suppress power supply ripple.
LROUT LFOUT RROUT RFOUT
Fader outputs. front rear attenuated independently. left right attenuation levels identical. These low-impedance outputs, since they have built-in operational amplifiers.
LFIN RFIN
Fader inputs These inputs must driven low-impedance outputs.
LOUT ROUT
Tone control outputs
Connections bass treble supplementary capacitors tone control circuit Connect high-frequency compensation capacitors between T1/T2 pairs. Connect low-frequency compensation capacitors between T2/T3 pairs.
LCT1 LCT2 RCT1 RCT2
Loudness circuit connections. Connect high-frequency compensation capacitors between LCT1/RCT1 LIN/RIN pins, connect lowfrequency compensation capacitors between LCT2/RCT2 Vref2.
Continued next page.
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LC75371M
Continued from preceding page.
Symbol Function Notes
Main volume control inputs These inputs must driven low-impedance outputs.
LSELO RSELO
Input selector outputs
Signal inputs
Power supply Ground Chip enable. Data loaded into internal latch when this goes from high low, analog switches operate that time. Data transfers enabled when this high.
TEST
Serial data clock inputs control. Test pin. This must left open.
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LC75371M Input Block Equivalent Circuit Diagram
Main Volume Control Block Equivalent Circuit Diagram
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LC75371M Tone Control Block Equivalent Circuit Diagram
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LC75371M Fader Block Equivalent Circuit Diagram
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LC75371M Sample Calculation Loudness Circuit External Constants First, LC75371M 10-dB step internal equivalent circuit shown page Figure below shows version that circuit which loudness circuit external components have been added, which been simplified this calculation. sample calculation below uses this circuit diagram acquire 5-dB boost 5-dB boost) Assuming that resistors capacitors Figure have following values: Then: VOUT kHz) VOUT From above equations find: 891.5 Therefore, specifications will capacitors that have these impedances connected externally. result that 178.5 0.18
Figure
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LC75371M Control System Timing Data Format LC75371M controlled applying data stipulated format pins. data consists bits, which bits chip address bits data.
Note: bits test bits, must
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LC75371M
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LC75371M
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LC75371M
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LC75371M
Usage Notes states internal analog switches undefined when power first applied. external muting circuit other technique mute outputs until correct control data been LC75371M. Either cover lines connected pins with ground pattern shielded cable those lines prevent high-frequency digital signals those lines from entering analog system. Muting input switching must used conjunction with volume control setting when maximum volume control attenuation (the position) used. Since there significant sample-to-sample variation magnitude main volume switching noise, request switching noise verification sample verify maximum switching noise.
Specifications SANYO Semiconductor products described contained herein stipulate performance, characteristics, functions described products independent state, guarantees performance, characteristics, functions described products mounted customer's products equipment. verify symptoms states that cannot evaluated independent device, customer should always evaluate test devices mounted customer's products equipment. SANYO Semiconductor Co., Ltd. strives supply high-quality high-reliability products. However, semiconductor products fail with some probability. possible that these probabilistic failures could give rise accidents events that could endanger human lives, that could give rise smoke fire, that could cause damage other property. When designing equipment, adopt safety measures that these kinds accidents events cannot occur. Such measures include limited protective circuits error prevention circuits safe design, redundant design, structural design. event that SANYO Semiconductor products (including technical data,services) described contained herein controlled under applicable local export control laws regulations, such products must exported without obtaining export license from authorities concerned accordance with above law. part this publication reproduced transmitted form means, electronic mechanical, including photocopying recording, information storage retrieval system, otherwise, without prior written permission SANYO Semiconductor Co., Ltd. information described contained herein subject change without notice product/technology improvement, etc. When designing equipment, refer "Delivery Specification" SANYO Semiconductor product that intend use. Information (including circuit diagrams circuit parameters) herein example only; guaranteed volume production. SANYO Semiconductor believes information herein accurate reliable, guarantees made implied regarding infringements intellectual property rights other rights third parties.
This catalog provides information December, 1997. Specifications information herein subject change without notice.
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LC75371M Overview Stereo Electronic Tone Volume Control

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