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Ordering number : EN5681
CMOS LSI
LC75392, 75392M
Single-Chip Electronic Volume Control System
Overview
The LC75392 (DIP-30SD) and the LC75392M (MFP30S) are electronic volume control ICs that provide input and output switching, volume, and tone control functions controlled by data transferred over a serial interface.
Package Dimensions
unit: mm 3196-DIP30SD
[LC75392]
Functions
* Input and output switching: Four inputs and outputs can be switched independently. * Volume control: A balance function can be implemented by controlling the left and right levels independently. Each channel can be set to 0 to -20 dB in 2 dB steps, -20 to -32 dB in 3 dB steps, -32 to -52 dB in 4 dB steps, -52 dB to -70 dB in 4.5 dB steps, and -. *Tone controls: Internal switches are provided to select between four sets of frequency characteristics. A buffer function can be implemented using external components.
SANYO: DIP30SD
unit: mm 3216-MFP30S
[LC75392M]
Features
Serial data interface: Support for control and communication in the CCB format.
SANYO: MFP30S
Specifications
Absolute Maximum Ratings at Ta = 25C, VSS = 0 V
Parameter Maximum supply voltage Maximum input voltage Allowable power dissipation Operating temperature Storage temperature Symbol VDD max VIN max Pd max Topr Tstg VDD CL, DI, CE, L1, L2, L3, L4, R1, R2, R3, R4 Ta 85C Conditions Ratings 12 VSS - 0.3 to VDD + 0.3 160 -40 to +85 -50 to +125 Unit V V mW C C
* CCB is a trademark of SANYO ELECTRIC CO., LTD. * CCB is SANYO's original bus format and all the bus addresses are controlled by SANYO.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
73097HA(OT) No. 5681-1/12
LC75392, 75392M Allowable Operating Ranges at Ta = 25C, VSS = 0 V
Parameter Supply voltage Input high-level voltage Input low-level voltage Input voltage amplitude Input pulse width Setup time Hold time Operating frequency Symbol VDD VIH VIL VIN toW tsetup thold fopg VDD CL, DI, CE CL, DI, CE L1, L2, L3, L4, R1, R2, R3, R4 CL CL, DI, CE CL, DI, CE CL Conditions Ratings min 5.5 4.0 VSS VSS 1.0 1.0 1.0 500 typ max 11.0 VDD 1.0 VDD Unit V V V Vp-p s s s kHz
Electrical Characteristics at Ta = 25C, VDD = 10 V, VSS = 0 V
Parameter [Input Block] Input resistance [Overall] THD1 Total harmonic distortion THD2 Crosstalk Output at maximum attenuation CT VO min VN1 Output noise voltage VN2 Current drain Input high-level current Input low-level current IDD IIH IIL VIN = 100 mV rms, f = 1 kHz, overall, buffer mode off, flat state VIN = 100 mV rms, f = 20 kHz, overall, buffer mode off, flat state VIN = 1 V rms, f = 1 kHz, overall, Rg = 1 k, buffer mode off, flat state VIN = 1 V rms, f = 1 kHz, main volume set to -, buffer mode on Flat overall (IHF-A), Rg = 1 k, buffer mode off, flat state Flat overall (DIN-AUDIO), Rg = 1 k, buffer mode off, flat state VDD - VSS = 11 V CL, DI, CE, VIN = 10 V CL, DI, CE, VIN = 0 V -10 0.013 0.013 81 -80 15 22 7 10 10 % % dB dB V V mA A A Rin L1, L2, L3, L4, R1, R2, R3, R4 500 k Symbol Conditions Ratings min typ max Unit
Equivalent Circuit Block Diagram
Latch
Decoder
Control
Shift register
No. 5681-2/12
LC75392, 75392M Test Circuit Total Harmonic Distortion
Use circuit constants identical to those of the right channel.
THD in
SG out Distortion analyzer
No. 5681-3/12
LC75392, 75392M Output Noise Voltage
Noise meter
Use circuit constants identical to those of the right channel.
No. 5681-4/12
LC75392, 75392M Crosstalk
Volt meter
Use circuit constants identical to those of the right channel.
No. 5681-5/12
LC75392, 75392M Pin Assignment
Top view
Pin Functions
Pin Pin No. Function Circuit
LVROUT RVROUT
1 30
Volume control outputs
LVRIN RVRIN
2 29
Volume control inputs
LTOUT RTOUT
3 28
Tone control circuit outputs
LTCOM RTCOM
4 27
Tone control circuit operational amplifier inverting inputs
LT1 LT2 LT3 LT4 RT1 RT2 RT3 RT4
8 7 6 5 23 24 25 26
Connections for the tone control pattern external constants
Continued on next page.
No. 5681-6/12
LC75392, 75392M
Continued from preceding page.
Pin Pin No. Function Circuit
L1 L2 L3 L4 R1 R2 R3 R4
12 11 10 9 19 20 21 22
Audio signal inputs and outputs
VDD Vref VSS
13 18 17
Power supply Analog system ground Ground
CL DI
14 15
Serial data and clock inputs for device control
CE
16
* Chip enable * Data is read into an internal latch and the analog switches operate when this pin goes from high to low. Data transfers are enabled when this pin is high.
No. 5681-7/12
LC75392, 75392M Volume Control Equivalent Circuit
No. 5681-8/12
LC75392, 75392M Control System Timing and Data Format To control the LC75392, applications must apply data in the stipulated format to the CE, CL, and DI pins. This data consists of 32 bits, of which 8 bits are the address and 24 bits are the control data.
1 s 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 and right at the same time
Note: The bits D20, D21, and D22 are IC test mode control data. User applications must always set these bits to 0.
No. 5681-9/12
LC75392, 75392M Sample Application Circuit (Three-input type)
Use circuit constants identical to those of the right channel.
Usage Notes * The states of the internal analog switches are undefined immediately after power is first applied. Applications should apply muting to the outputs of this IC using external circuits until the control data has been set up. * The CL, DI, and CE pin lines should be shielded by the ground pattern or shielded lines should be used to prevent the high-frequency digital signals that are transmitted over these lines from entering the analog system as noise. * We recommend that applications use a sequence of several smaller steps to approach the final setting when changing the value of the volume control setting significantly. For example, the sequence shown below should be used when changing from 0 dB to -. This can reduce switching noise. Example: 0 dB -10 dB -20 dB -40 dB -70 dB -
No. 5681-10/12
LC75392, 75392M
Main Volume Step Characteristics
Tone Control Characteristics
Main volume attenuation - dB
Overall
Output level - dB
Steps
Frequency, f - Hz
THD vs. Frequency Characteristics
Total harmonic distortion, THD - % Total harmonic distortion, THD - %
THD vs. Power-Supply Voltage Characteristics
80 kHz low-pass filter Overall
80 kHz low-pass filter Overall Buffer mode off Flat
Frequency, f - Hz
Power-supply voltage, VDD - V
THD vs. Input Level Characteristics
Total harmonic distortion, THD - %
80 kHz low-pass filter Overall Buffer mode off Flat
Input level, VIN - dBV
No. 5681-11/12
LC75392, 75392M
s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of July, 1997. Specifications and information herein are subject to change without notice. No. 5681-12/12

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