Sanyo EP93F - Manual (Page 22)

LA2657M LA2657M LA2657M
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1
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NC
NC
VCC BBE
on/off F.SW
NC
NC
NC
NC
NC NC
NC
EVR
EVR
NC
F.SW
PA
PA
PA
PA
+
+
+
+ +
+
+
VDD
CE DI CL
53
BBE
BBE
BBE
BBE
+
+
+
+
+
+
+
+
+
F.
SW
F.
SW
Vreg
EVR
TONE
S-BASS
V ef
BBE
SW
BBE
BBE
CCB
INTERFACE
FADER
FADER TONE
S-BASS
EVR
39 Car Audio 40 Car Audio
LA2901V LA2901V LA2901V
36k
Ω
24k Ω
24k Ω
36k
Ω
36k
Ω
30k
Ω
30k
Ω
12k
Ω
36k
Ω
12k
Ω
30k
Ω
30k
Ω
36k
Ω
36k
Ω
10k Ω 10k Ω 10k Ω 10k Ω
24k Ω
24k Ω
+ +
22 µ F 22 µ F 47 µ F
LF-IN LR-IN
Ripple
Filter +
22 µ F
22 µ F
RF-IN
+
22 µ F
RR-IN
+
DC-R DC-L
--
--
+ -- + -- +
+ -- + -- + -- + -- + -- +
+
22 µ F
100 µ F
10 µ F
100 µ F
22 µ F 1.5NF 1.5NF +
+
+
+
+ 22 µ F +
LF-OUT LR-OUT
RF-OUT RR-OUT
VCC
9.0V
V REF V REF V REF V REF V REF V REF
V CC V CC V CC V CC
SIGNAL AMP SIGNAL AMP LIFT AMP
LIFT AMP SIGNAL AMP SIGNAL AMP
-- + -- + -- +
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X X
Four Channel High-Output Line Amplifier Four Channel High-Output Line Amplifier
for Car Audio
for Car Audio
Car Audio Electronic Volume Control IC Car Audio Electronic Volume Control IC Car Audio Electronic Volume Control IC
with BBE Surround Processor with BBE Surround Processor with BBE Surround Processor
Four Channel High-Output Line Amplifier
for Car Audio
Conditional
Product
Conditional Conditional Conditional
Product Product Product
: Use of conditional products requires
consultation with a SANYO representative
prior to the use of the device. ❋
Overview Overview
Functions and Features Functions
Block Diagram Block Diagram
:This product is subject to change without notice for improvement. When considering the use of this
product, first refer to the latest SANYO "Semiconductor News" publication related to this device and
finally refer to the latest specifications for the device. ❋
The LA2657M is an audio signal processor for car audio that integrates the functions of the LC75421 IC and a
BBE surround processing on a single chip. The LA2657M's main functions include input functions, input gain
adjustment, tone controls, super bass function, balance control, volume fader control, and the BBE surround
processor.
■ Input functions: Four input systems (L+R) (The LC75421 provides five input systems.)
■ Input gain control (0 to 18.75 dB in 1.25 dB steps)
■ BBE processor
■ Tone controls (Bass: ± 11.9 dB, treble: ± 11.9 dB. Both in 1.7 dB steps)
■ Super bass (0 to 20 dB in 2 dB steps)
■ Master volume control (0 dB to -79 dB in 1 dB steps, - ∞ )
■ Bus control
■ Fader (0 to -20 dB in 2 dB steps, -20 to -25 dB in 5 dB steps, -25 to -45 dB in 10 dB steps, -60 dB, - ∞ )
■ CCB bus (On/off control of the BEE function is not provided over the CCB bus.)
■ Package: QIP64E (14 14 mm)
The LA2901V is a 4-channel high-output line amplifier designed for car audio applications.
Since the output voltage is increased significantly over conventional line amplifiers, the LA2901V achieves a high
signal-to-noise ratio and high audio quality in the connection from the main unit to the external amplifier and
can improve power amplifier performance.
The LA2901V also provides significant space savings over earlier solution but reducing by one half the number
of capacitors previously required to boost the signal system supply voltage and by adopting the SSOP miniature
package.
■ High output level (5.3 V rms)
■ Low output noise voltage (12 µ V)
■ Low total harmonic distortion (0.004 %)
■ High ripple rejection ratio (70 dB)
■ Minimal number of external components required
■ Superb audio quality
■ Package: SSOP24 (275 mil)
We recommend the use of 1% tolerance or better resistors
for the 24 k
Ω and 36 k Ω feedback resistors.
BBE and BBE symbol are registered trademarks of BBE Sound, Inc.
R