Sanyo LA4571MB Specifications
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
Monolithic Linear IC
Low-voltage Headphone Amplifier
for Stereo Audio
Ordering number:ENN3534
LA4571MB
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Overview
The LA4571MB is a low-voltage, stereo headphone amplifier incorporating both tape head preamplifiers and headphone power amplifiers in a single chip, making it ideal for
portable battery-powered equipment. It features logic-le vel
controlled output signal muting, excellent noise characteristics and easy interconnection with signal sources, such as
an AM/FM tuner IC.
The LA4571MB requires no input or output coupling capacitors. A buffer amplifier with 10Ω output impedance
reduces the size of the virtual-earth decoupling capacitor.
The preamplifier and power amplifier inputs only require
the addition of an external capacitor to provide high-frequency noise filtering.
The LA4571MB operates from a 3V supply and is available in 20-pin MFPs.
Features
• Stereo tape head preamplifiers and headphone power
amplifiers on chip.
• Output signal muting.
• Low noise.
• 8Ω speaker driver.
• 3V supply.
• 20-pin MFP.
Package Dimensions
unit:mm
3036B-MFP20
20
1
0.35
[LA4571MB]
12.6
1.27
11
10
1.50.1
0.59
5.4
0.15
1.8 max
SANYO : MFP20
6.35
0.625
7.6
Specifications
Maximum Ratings at Ta = 25˚C
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egatlovylppuSV
noitapissidrewopelbawollAxamdP 004Wm
erutarepmetgnitarepOrpoT 57+ot02–
erutarepmetegarotSgtsT 521+ot04–
Recommended Operating Conditions at Ta = 25˚C
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egatlovylppuSV
egnaregatlovylppuSV
xam 5.4V
CC
CC
po 6.3ot8.1V
CC
40500TN (KT)/3271TS (US) No.3534–1/9
˚C
˚C
0.3V
LA4571MB
Electrical Characteristics
Preamplifier and power amplifier at Ta = 25˚C, VCC=3.0V, f=1kHz, RL (pre)=10kΩ, RL (power)=16Ω,
0dBm at 0.775V unless otherwise noted
retemaraPlobmySsnoitidnoC
tnerrucylppustnecseiuQI
niagegatlovlatoTGV
OCC
T
k2.2=gR Ω V,IV0=7172Am
V
mBd5–=568617Bd
O
nimpytxam
Preamplifier at Ta = 25˚C, VCC=3.0V, f=1kHz, RL (pre)=10kΩ, RL (power)=16Ω, 0dBm at 0.775V unless otherwise
noted
retemaraPlobmySsnoitidnoC
niagegatlovpool-nepOGV
niagegatlovpool-desolCGV
egatlovtuptuomumixaMV
noitrotsidcinomrahlatoTDHT
egatlovesionnoisrevnoctupnIV
klatssorclennahCTC
noitcejerelppiRR
O
O
1
xamV,%1=DHT
1VO
IN
1
1r
V
V
mBd5–=0708Bd
O
mBd5–=04Bd
O
k2.2=gR Ω zHk02otzH02=htdiwdnab,3.10.2Vµ
k2.2=gR Ω enutzHk1,0608Bd
k2.2=gR Ω V,
V8.1=1.02.0V
CC
V,V8.1=
CC
r
)dradnatsBAN(Bd04=GV,V2.0=50.05.0%
zH001=f,mBd02–=0405Bd
nimpytxam
Power amplifier at Ta = 25˚C, VCC=3.0V, f=1kHz, RL (pre)=10kΩ, RL (power)=16Ω, 0dBm at 0.775V unless
otherwise noted
retemaraPlobmySsnoitidnoC
rewoptuptuOP
niagegatlovpool-desolCGV
noitrotsidcinomrahlatoTDHT
klatssorclennahCTC
egatlovesiontuptuOV
noitcejerelppiRR
ecnatsisertupnIR
egatlovtesffoCDtuptuOV
O
2
2PO
T
ON
2r
i
ffoCDO
%01=DHT3223Wm
V
V
mBd5–=528213Bd
O
Wm1=4.00.1%
R,mBd5–=
O
0=gR Ω zHk02otzH02=FPB,4204Vµ
0=gR Ω V,
0= Ω 0304Bd
V
V,zH001=f,Bd02–=
r
V8.1=5406Bd
CC
Note : The maximum and minimum values for the power amplifiers closed-loop voltage gain (VG2) increase by 1dB when the load resistance (RL) is
32Ω.
nimpytxam
sgnitaR
sgnitaR
sgnitaR
220383kΩ
09–09+Vm
tinU
tinU
tinU
Block Diagram
No.3534–2/9
Pin Assignment
Pin Description
rebmuNemaNnoitpircseD
1DNGERPdnuorgreifilpmaerP
21NItupnireifilpmaerp1lennahC
31FNtupnikcabdeefevitagenreifilpmaerp1lennahC
41TUOERPtuptuoreifilpmaerp1lennahC
51TUOWSNIRtuptuodehctiwslortnoc-etumreifilpmaerp1lennahC ≥ k005 Ω
61NIREWOPR.tupnireifilpmarewop1lennahC
7ETUMERPlortnocetumreifilpmaerP
8FERFRnoitcennocroticapacretlif-elppiR
9V
01DNGREWOPdnuorgreifilpmarewoP
11NOMMOCtuptuoreifilpmanommoC
211TUOtuptuoreifilpmarewop1lennahC
312TUOtuptuoreifilpmarewop2lennahC
41ETUMREWOPlortnocetumreifilpmarewoP
512NIREWOPR.tupnireifilpmarewop2lennahC
612TUOWSR.tuptuodehctiwslortnoc-etumreifilpmaerp2lennahC
712TUOERPtuptuoreifilpmaerp2lennahC
812FNtupnikcabdeefevitagenreifilpmaerp2lennahC
912NItupnireifilpmaerp2lennahC
02FERVI.tuptuoreifilpmaegatlov-encerefeR
LA4571MB
Top view
≅ k03 Ω
NI
CC
egatlovylppuS
≅ k03 Ω
NI
≥ k005 Ω
NI
Aµ005±=
xam
No.3534–3/9
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