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PDF LC75382E Data sheet ( Hoja de datos )
| Número de pieza | LC75382E | |
| Descripción | Electronic Tone Controls for Car Stereo Systems | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : EN4881A
CMOS LSI
LC75382E
Electronic Tone Controls
for Car Stereo Systems
Overview
The LC75382E is an electronic tone control IC that can
implement, with minimal external components, the
complete range of tone and volume controls required in a
car stereo, including volume, balance, fader, bass and
treble, input switching and input level controls.
Features
• Volume:
Controls the left and right volume levels
independently from 0 dB to –78 dB (in
2 dB steps) and –∞ dB (41 settings).
Since the left and right levels are
independent this circuit also functions as
a balance control.
• Fader:
Attenuates either the rear or front outputs
over 16 levels, from 0 dB to –20 dB in
2 dB steps, from –20 dB to –25 dB in
5 dB step, from –25 dB to –45 dB in
10 dB steps and then to –60 dB and –∞ dB.
• Bass/treble: Implements 21 position bass and treble
controls with the addition of external
capacitors.
• Input selector: Selects one of four inputs for both the
left and right channels. The selected
input signal can be amplified by between
0 dB and +18 dB in 6 dB steps.
• The provision of on-chip operational amplifiers means
that few external components are required.
• Fabricated in a silicon gate process for minimal
switching noise.
• All functions can be controlled by serial data over a
CCB interface.
Specifications
Absolute Maximum Ratings at Ta = 25°C, VSS = 0 V
Package Dimensions
unit: mm
3156-QFP48E
[LC75382E]
SANYO: QIP48E
• 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.
Parameter
Maximum supply voltage
Maximum input voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VDD max
VIN max
Pd max
Topr
Tstg
Conditions
VDD
CL, DI, CE, LTIN, RTIN, L10dBIN, R10dBIN, L2dBIN,
R2dBIN, LFIN, RFIN, L1 to L4, R1 to R4
Ta ≤ 85°C
Ratings
12
VSS – 0.3 to
VDD + 0.3
310
–40 to +85
–50 to +125
Unit
V
V
mW
°C
°C
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
N2095HA (OT)/11895TH (OT)No. 4881-1/16
1 page  
2. Output noise voltage
LC75382E
No. 4881-5/16
5 Page 
LC75382E
Tone Control Circuit External Capacitor Value Calculation Example
The external capacitors used with the LC75382E are structural components of semiconductor inductors (simulated
inductors). This section presents the equivalent circuits and formulas for acquiring the desired center frequencies.
1. Semiconductor inductor equivalent circuit
2. Sample calculation
Specifications: 1. Center frequency FO = 100 Hz
2. Q at maximum boost: Qmax = 1.05
x Derive the sharpness of the semiconductor inductor itself, QO.
(RT4 + Rfeed)
QO =
RT4 × Qmax = 2.6481
y Derive C1.
C1 = 1/2πFORT4QO ≠ 0.60 (µF)
z Derive C2.
C2 = QO/2πFORT3 ≠ 0.014 (µF)
Note: See the tone block equivalent circuit diagram (page 10) for the internal resistance.
No. 4881-11/16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet LC75382E.PDF ] | |
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