LC75392, 75392M Single-Chip Electronic Volume Control System
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Ordering number EN5681
LC75392, 75392M
Single-Chip Electronic Volume Control System
Overview
LC75392 (DIP-30SD) LC75392M (MFP30S) electronic volume control that provide input output switching, volume, tone control functions controlled data transferred over serial interface.
Package Dimensions
unit: 3196-DIP30SD
[LC75392]
Functions
Input output switching: Four inputs outputs switched independently. Volume control: balance function implemented controlling left right levels independently. Each channel steps, steps, steps, steps, controls: Internal switches provided select between four sets frequency characteristics. buffer function implemented using external components.
SANYO: DIP30SD
unit: 3216-MFP30S
[LC75392M]
Features
Serial data interface: Support control communication format.
SANYO: MFP30S
Specifications
Absolute Maximum Ratings 25°C,
Parameter Maximum supply voltage Maximum input voltage Allowable power dissipation Operating temperature Storage temperature Symbol Topr Tstg 85°C Conditions Ratings +125 Unit
trademark SANYO ELECTRIC CO., LTD. SANYO's original format addresses controlled SANYO.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, Chome, Ueno, Taito-ku, TOKYO, JAPAN
73097HA(OT) 5681-1/12
LC75392, 75392M 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 Conditions Ratings 11.0 Unit Vp-p
Electrical Characteristics 25°C,
Parameter [Input Block] Input resistance [Overall] THD1 Total harmonic distortion THD2 Crosstalk Output maximum attenuation Output noise voltage Current drain Input high-level current Input low-level current rms, kHz, overall, buffer mode off, flat state rms, kHz, overall, buffer mode off, flat state rms, kHz, overall, buffer mode off, flat state rms, kHz, main volume buffer mode Flat overall (IHF-A), buffer mode off, flat state Flat overall (DIN-AUDIO), buffer mode off, flat state 0.013 0.013 Symbol Conditions Ratings Unit
Equivalent Circuit Block Diagram
Latch
Decoder
Control
Shift register
5681-2/12
LC75392, 75392M Test Circuit Total Harmonic Distortion
circuit constants identical those right channel.
Distortion analyzer
5681-3/12
LC75392, 75392M Output Noise Voltage
Noise meter
circuit constants identical those right channel.
5681-4/12
LC75392, 75392M Crosstalk
Volt meter
circuit constants identical those right channel.
5681-5/12
LC75392, 75392M Assignment
view
Functions
Function Circuit
LVROUT RVROUT
Volume control outputs
LVRIN RVRIN
Volume control inputs
LTOUT RTOUT
Tone control circuit outputs
LTCOM RTCOM
Tone control circuit operational amplifier inverting inputs
Connections tone control pattern external constants
Continued next page.
5681-6/12
LC75392, 75392M
Continued from preceding page.
Function Circuit
Audio signal inputs outputs
Vref
Power supply Analog system ground Ground
Serial data clock inputs device control
Chip enable Data read into internal latch analog switches operate when this goes from high low. Data transfers enabled when this high.
5681-7/12
LC75392, 75392M Volume Control Equivalent Circuit
5681-8/12
LC75392, 75392M Control System Timing Data Format control LC75392, applications must apply data stipulated format pins. This data consists bits, which bits address bits control data.
tDEST
Don't care Volume control data
Don't Don't care care Tone pattern control data
Don't care Buffer mode
Test mode
Don't care
Function switch control data
Channel selection
Left right same time
Note: bits D20, D21, test mode control data. User applications must always these bits
5681-9/12
LC75392, 75392M Sample Application Circuit (Three-input type)
circuit constants identical those right channel.
Usage Notes states internal analog switches undefined immediately after power first applied. Applications should apply muting outputs this using external circuits until control data been lines should shielded ground pattern shielded lines should used prevent high-frequency digital signals that transmitted over these lines from entering analog system noise. recommend that applications sequence several smaller steps approach final setting when changing value volume control setting significantly. example, sequence shown below should used when changing from This reduce switching noise. Example:
5681-10/12
LC75392, 75392M
Main Volume Step Characteristics
Tone Control Characteristics
Main volume attenuation
Overall
Output level
Steps
Frequency,
Frequency Characteristics
Total harmonic distortion, Total harmonic distortion,
Power-Supply Voltage Characteristics
low-pass filter Overall
low-pass filter Overall Buffer mode Flat
Frequency,
Power-supply voltage,
Input Level Characteristics
Total harmonic distortion,
low-pass filter Overall Buffer mode Flat
Input level,
5681-11/12
LC75392, 75392M
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 July, 1997. Specifications information herein subject change without notice. 5681-12/12
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