LC75372E Electronic Volume Control Stereo Systems Overview

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LC75372E Electronic Volume Control Stereo Systems Overview

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Ordering number EN5330
LC75372E
Electronic Volume Control Stereo Systems
Overview
LC75372E electronic volume control that implement volume, balance, fader, bass/treble, loudness, input switching, input level control functions with minimal number external components.
Built-in reference voltage generation circuit Serial data input: Supports format communication with system controller.
Package Dimensions
unit: 3148-QFP44MA
[LC75372E]
Features
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 (LUX type) with addition external capacitors. base treble controls each have positions. Loudness: volume resistor ladders tapped starting -20-dB position. loudness function implemented adding external circuits these taps. signal selected from three inputs each left right channels. input signals amplified from 6-dB steps. On-chip buffer amplifiers minimum external components. Minimal switching noise fabrication silicongate CMOS process.
SANYO: QIP44MA
trademark SANYO ELECTRIC CO., LTD. SANYO's original format addresses controlled SANYO.
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 +125 Unit
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN
41596HA (OT) 5330-1/18
LC75372E 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 10.0 Unit Vp-p
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 Volume 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 Crosstalk Output maximum attenuation Vrms, kHz, settings flat overall Vrms, kHz, settings flat overall Vrms, kHz, settings flat overall, Vrms, kHz, main volume Vrms, kHz, main volume INMUTE settings flat overall (IHF-A), settings flat overall (DIN-AUDIO), settings flat overall, measurement point; fader output 0.045 0.040 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 L10dBIN, R10dBIN: 10-dB steps, loudness LIN, RIN: 1-dB steps Gstep +16.0 +18.0 +6.0 +20.0 Symbol Conditions Unit
Output noise voltage Current drain Input high-level current Input low-level current Maximum input level
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LC75372E Equivalent Circuit Block Diagram Sample Application Circuit
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LC75372E Electrical Characteristics Test Circuits Total harmonic distortion
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LC75372E Output noise voltage
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LC75372E Crosstalk
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LC75372E Assignment
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LC75372E Functions
Symbol Equivalent circuit Function
Common pins main volume block, fader volume block, tone block, gain control block, input switching block. LVref RVref Since capacitors connected between LVref/RVref become residual resistance when volume control maximum attenuation, values these capacitors must chosen carefully. applied voltage must never exceed VDD.
Vref
0.488 voltage generation block. capacitor must connected between Vref suppress power supply ripple.
LROUT LFOUT RROUT RFOUT Fader outputs. front rear systems attenuated independently. amount attenuation same left right channels. impedance operational amplifier outputs
LFIN RFIN
Fader inputs Must driven from low-impedance circuits.
LOUT ROUT
Tone control outputs
LCT1 LCT2 RCT1 RCT2 Loudness pins. Connect high-band compensation capacitors between LCT1/RCT1 L10dBIN/R10dBIN, connect low-band compensation capacitors between LCT2/RCT2 LVref/RVref. Connections bass treble compensation capacitors tone control circuit Connect high-band compensation capacitors between Connect low-band compensation capacitors between
Continued next page. 5330-8/18
LC75372E
Continued from preceding page.
Symbol Equivalent circuit Function
L10dBIN R10dBIN
10-dB volume control inputs These inputs must driven from low-impedance circuits.
LSELO RSELO
Outputs from input selector
Signal inputs
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.
TEST L10dBOUT R10dBOUT
Inputs serial data clock used control. Test input (Must left open during normal operation.) 10-dB block outputs 1-dB block inputs These inputs must driven low-impedance circuits.
No-connection pins.
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LC75372E Input Block Equivalent Circuit
Main Volume Control Equivalent Circuit
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LC75372E Tone Control Block Equivalent Circuit
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LC75372E Fader Volume Control Block Equivalent Circuit
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LC75372E Sample Calculation Loudness Circuit External Constants First, LC75372E 10-dB step internal equivalent circuit shown page Figure shows 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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LC75372E Control System Timing Data Format LC75372E controlled applying data stipulated format pins. data consists bits, which bits chip address bits data.
Note: bits test bits, must
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LC75372E
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LC75372E
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LC75372E
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LC75372E
Usage Notes states internal analog switches undefined when power first applied. external muting circuit other technique mute outputs until correct control data been LC75372E. 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.
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 April, 1996. Specifications information herein subject change without notice. 5330-18/18

LC75372E Electronic Volume Control Stereo Systems Overview

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