LC75397E Overview Single Chip Electronic Volume Tone Control
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Ordering number EN6108
LC75397E
Overview
Single Chip Electronic Volume Tone Control System
LC75397 electronic volume control system providing control over volume, balance, 4-band equalizer, bass, input switching based serial inputs.
Functions
Volume control: chip provides levels volume attenuation: 1-dB step between This circuit control total independent channels. Equalizer: chip provides control 2-dB steps over range between Three four bands have peaking equalization; remaining one, shelving equalization. Selector: left right channels each offer choice inputs. inputs turned independently. external constant determines amplification input signal. Input gain: input signal amplified 2-dB steps. Bass control: bass controlled over range 2-dB steps.
Features
Built-in buffer amplifiers reduce number external parts required. Silicon gate CMOS process reduces noise built-in switch. Built-in analog ground reference voltage generator circuit functions controlled serial input data. This supports standard.
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
40799RM (OT) 6108-1/26
LC75397E
Specifications
Absolute Maximum Ratings 25°C,
Parameter Maximum supply voltage Maximum input voltage Allowable power dissipation Operating temperature Storage temperature Symbol Topr Tstg LTIN, RTIN, LVR1IN, RVR1IN, LVR2IN, RVR2IN, LVR3IN 75°C, with board* Conditions Ratings 1000 +125 Unit
Note Printed circuit board size: 76.1 114.3 printed circuit board material: glass/Epoxy resin
Allowable Operating Ranges 75°C,
Parameter Supply voltage Input high level voltage Input level voltage Input voltage amplitude Input pulse width Setup time Hold time Operating frequency Symbol tSETUP tHOLD fopg LTIN, RTIN, LVR1IN, RVR1IN, LVR2IN, RVR2IN, LVR3IN Conditions Ratings 10.5 Unit Vp-p
Electrical Characteristics 25°C,
Parameter [Input block] Input resistance Clipping level Output load resistance [Volume control block] Input resistance [Bass control block] Control range Step resolution Internal feedback resistance [F1/F2 band equalizer control block] Control range Step resolution Internal feedback resistor [F3/F4 band equalizer control block] Control range Step resolution Internal feedback resistor [Overall characteristics] Total harmonic distortion Crosstalk Output noise voltage Output maximum attenuation Current drain Input high level current Input level current Vrms, kHz, with controls flat overall Vrms, kHz, with controls flat overall, With controls flat overall, kHz, L.P.F Bass band +10dB, With controls overall, kHz, L.P.F With controls flat overall 10.5 10.5 10.2 10.6 0.01 Estep Rfeed Max. boost/cut Estep Rfeed Max. boost/cut 51.8 Estep Rbb1 Rbb2 Max, boost/cut LVR1IN, RVR1IN, LVR2IN, RVR2IN, LVR3IN LSELO, RSELO: 1.0% LSELO, RSELO 3.00 Vrms Symbol Conditions Ratings Unit
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LC75397E Package Dimensions unit (typ) 3159-QFP64E
[LC75397]
17.2 14.0 0.35
0.15
17.2 14.0
3.0max
15.6
SANYO: QFP64E (QIP64E)
Assignment
LC75397E
view
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Sample Application Circuit
1984 20000
LC75397E
Control circuit Logic circuit interface
LC75397E
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1984
20000
LC75397E Control System Timing Data Formats control LC75397E, specified sequences required input through pins Each sequence consists bits: 8-bit address followed bits data.
DEST
Address Code This product uses 8-bit address code, supports same specifications other Sanyo serial products. Address code (LSB)
Control Code Allocations Input switching control (L1,
(R1) (R2) (R3) (R4) (R5) Switch Switch Switch Operation
Input switching control (L6,
(R6) (R6)
Operation
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LC75397E Input gain control
Operation
Bass 4-band equalizer control
band band band band
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LC75397E Volume control
Operation
Continued next page.
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LC75397E
Continued from preceding page.
Operation
Channel selection control
Operation Initial setting Righ channel Left channel Simulataneous left right
Volume control
Operation Control Control enabled
Right channel control enabled when Left channel control enabled when
Volume control
Operation Control Control enabled
Right channel control enabled when Left channel control enabled when
Volume control
Operation Control Control enabled
Control this function enabled when
Test mode control
These bits chip testing must application systems.
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LC75397E Functions
Signal inputs Function Equivalent circuit
LSELO RSELO
Input selector outputs
LBB1 LBB2 RBB1 RBB2 LBBOUT RBBOUT Bass circuit inputs outputs
LTIN RTIN
Equalizer inputs
LF1C1 LF1C2 RF1C1 RF1C2 Connections resistors capacitors that form band equalizer.
LF2C1 LF2C2 RF2C1 RF2C2 Connections resistors capacitors that form band equalizer.
Continued next page.
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LC75397E
Continued from preceding page.
Function Equivalent circuit
Connections capacitors that form equqlizer band filters Connections external capacitors
LF3C1 LF3C2 LF3C3 RF3C1 RF3C2 RF3C3 Connections resistors capacitors that form band equalizer.
LTOUT RTOUT
Connections resistors capacitors that form band equalizer.
LVR1IN LVR2IN LVR3IN RVR1IN RVR2IN
Left channel volume input Left channel volume input Left channel volume input Right channel volume input Right channel volume input
LVR3OUT LVR2OUT LVR1OUT RVR2OUT RVR1OUT
Left channel volume output Left channel volume output Left channel volume output Right channel volume output Right channel volume output
Continued next page.
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LC75397E
Continued from preceding page.
Function Equivalent circuit
Vref
capacitor with value tens must inserted between Vref AVSS (VSS) reduce power supply ripple voltage generator block used analog ground.
Ground Power supply Chip enable
When this goes from high low, data written internal latch analog switches operate. Data transfers enables when this high level.
Serial data clock inputs chip control
Electronic volume control test pin. TEST This must held potential.
Unused pins. These pins must either left open connected VSS.
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LC75397E Equivalent Circuit Diagram Selector Control Block
Right channel same left Unit (resistance
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LC75397E Bass control block internal equivalent circuit
right channel identical. Units (resistance:
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LC75397E F1/F2 band equalizer block internal equivalent circuit
Right channel same left Unit (resistance:
When providing boost, switches when providing cut, switches 0-dB mode (through), 0-dB switch switches
F3/F4 band equalizer block internal equivalent circuit
Right channel same left Unit (resistance:
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LC75397E Volume block internal equivalent circuit
Right channel same left Unit (resistance:
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LC75397E Test Circuits Total Harmonic Distortion
left channel identical
Unit (capacitance
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LC75397E Output Noise Voltage
left channel identical
Unit (resistance capacitance
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LC75397E Crosstalk
left channel identical
Unit (resistance capacitance
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LC75397E External Capacitor Calculations Bass circuit value external capacitor used LC75397E bass control calculated shown example below.
Sample calculation: center frequency Substitute LC75397E internal resistors shown below into above formula. This allows value capacitor, calculated. 57.993 Assume R1R2 0.47 1300 58000 Formula calculating gain: 1.476 56.517 (R2U R2L) (-)2 (-)2 3.16 R2U) (R2U R2L) Formula calculating (R2U R2L) R2U) (R2U R2L)
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LC75397E F1/F2 band circuits This section presents equivalent circuit formulas used calculate external resistor capacitor values provide center frequency F1/F2 band equivalent circuit
Sample calculation Specifications: Center frequency: Gain maximum boost: G+10dB Assume 51.8 Determine from specification that G+10dB G+10dB LOG10
51800 11979.7 (10G+10dB/20 (3.162 Determine from specification that center frequency R1R2C1C2 0.0431 10-6 0.044 R1R2 51800 12000 Determine 51800 1.039 R1R2CC 51800 12000
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LC75397E F3/F4 band circuits band circuit supports peaking characteristics band circuit supports shelving characteristics. Peaking characteristics band) external capacitor used construct simulated inductor. This section presents equivalent circuit formulas determining desired center frequency. Simulated inductor equivalent circuit
band)
Impedance resonance
band)
Sample calculation Specifications: Center frequency: maximum boost: Q+10dB Determine sharpness, simulated inductor itself. Q+10dB 4.270 Determine 1/2f0R1Q0 0.536 (µF) Determine 2f0R2 0.021 (µF) Reference values
Center frequency (Hz) 1070 3400 0.536 0.169 0.054 0.017 0.021 6663P 2117P 666P
Shelving characteristics band) Gains 2-dB steps) with respect target frequency achieved using external capacitor with calculated according formula shown below.
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LC75397E
Equivalent circuit formula when boosting.
Sample calculation Specifications: Target frequency: 17,000 2,819
10G/20
7500 17000 (2819)2 3.16 4600 (pF)
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Band Frequency Characteristics
Volume Step Characteristics
Settings: starting
Gain,
Volume attenuation
External 0.044 External
Over
Step
Frequency, Bass Band Frequency Characteristics
LC75397E
Band Frequency Characteristics
Settings: starting
<Conditions> External 3200 External Settings: starting
Gain,
Gain,
External capacitance 0.47
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Frequency,
Frequency,
THD-Frequency Chapacteristics
Band Frequency Characteristics
Settings: starting
<Conditions> External 0.18 External 0.15
Total harmonic distortion,
<Conditions> pass weighting Gain Graphic equalizer flat
Volume position
Frequency,
Gain,
Volume position
Frequency, Band Frequency Characteristics
LC75397E
THD-Frequency Chapacteristics
Settings: starting
<Conditions> External 4700
Total harmonic distortion,
Volume position
<Conditions> pass weighting Gain Graphic equalizer flat
Volume position
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Frequency,
Gain,
Frequency,
Input Level Characteristics Supply Voltage Characteristics
Volume position
<Conditions> pass weighting Gain Graphic equalizer flat
Total harmonic distortion,
<Conditions> pass weighting Volume position Graphic equalizer flat Volume position
Total harmonic distortion,
Input level,
Supply voltage, Supply Voltage Characteristics
LC75397E
Input Level Characteristics
Total harmonic distortion,
Total harmonic distortion,
<Conditions> pass weighting Volume position Graphic equalizer flat
Volume position
<Conditions> pass weighting Gain Graphic equalizer flat
Volume position
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Input level,
Supply voltage,
LC75397E Usage Notes When power first applied, internal analog switches indeterminate states. chip therefore requires muting other external measures until received proper data. After power first applied, applications must initialize this chip sending initial data described below. Provide grounding patterns shielding lines pins prevent their high-frequency digital signals from interfering with operation nearby analog circuits.
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 April, 1999. Specifications information herein subject change without notice.
6108-26/26
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