Page 1
Overview
The LA4582CM is a preamplifier plus power amplifier IC
that support auto-reverse, and was developed for 3-V
headphone stereo systems.
Features
• The LA4582CM was developed for cassette playback
systems, and in addition to preamplifier and power
amplifier functions, it also provides low boost and
automatic power limitation (PVSS: Peak Volume Select
System) functions.
• Provided in a 36-pin miniature flat package (0.65 mm
lead pitch) that is optimal for set miniaturization.
• Capable of driving 8-Ω speakers
• Two-channel playback auto-reverse preamplifier
• Two-channel headphone power amplifier
• Low-frequency boost function (auto-loudness effect)
• Output suppression function (PVSS)
• Two-channel radio input switch (pre-mute switch)
• Power mute switch
Package Dimension
unit: mm
Monolithic Linear IC
Ordering number : EN5701
63097HA(OT) No. 5701-1/6
SANYO: QFP36
[LA4582CM]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
Pre + Power Amplifier for
3-V Headphone Stereo Systems
LA4582CM
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
CC
max 4.5 V
Allowable power dissipation Pd max 375 mW
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –40 to +150 °C
Specifications
Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
CC
3.0 V
Operating voltage range V
CC
op 1.8 to 3.6 V
Operating Conditions at Ta = 25°C
Ambient temperature, Ta – °C
Allowable power dissipation, Pdmax – mW
Page 2
No. 5701-2/6
LA4582CM
Parameter Symbol Conditions
Ratings
Unit
min typ max
[PRE + L.BOOST + PVSS + POWER]
Quiescent current
I
CCO
1 Rg = 2.2 kΩ, low boost off, PVSS off 13 19 29 mA
I
CCO
2 Rg = 2.2 kΩ, low boost on, PVSS on 14 20 30 mA
Voltage gain (closed loop) VG
TVO
= –5 dBm 62.5 64.5 67.5 dB
[Preamplifier]
Voltage gain (open loop) VG
0VO
= –5 dBm 70 83 dB
Voltage gain (closed loop) VG
1VO
= –5 dBm 40 dB
Maximum output voltage V
O
max1 THD = 1%, VCC= 1.8 V 0.1 0.2 V
Total harmonic distortion THD
1VO
= 0.2 V, VG = 40 dB/NAB 0.05 0.5 %
Equivalent input noise voltage V
NI
Rg = 2.2 kΩ, BPF = 20 Hz to 20 kHz 1.3 2.0 µV
Crosstalk CT
1
Rg = 2.2 kΩ, TUNE 1 kHz 60 80 dB
Ripple rejection Rr
1
Rg = 2.2 kΩ, VCC= 1.8 V,
40 50 dB
Vr = –20 dBm, fr = 100 Hz
[Power Amplifier]
Output power P
O
THD = 10% 23 34 mW
Voltage gain (closed loop) VG
2VO
= –5 dBm 27 29 32 dB
Total harmonic distortion THD
2PO
= 1 mW 0.4 1.0 %
Interchannel crosstalk CT
2VO
= –5 dBm, RV= 0 Ω 30 40 dB
Output noise voltage V
NO1RV
= 0 Ω, BPF = 20 Hz to 20 kHz 25 40 µV
Ripple rejection Rr
2
RV= 0 Ω, Vr= –20 dBm
45 55 dB
fr = 100 Hz, V
CC
= 1.8 V
Input resistance Ri 22 30 38 kΩ
DC offset voltage V
ODC OFF
Between pin 8 and pins 4 to 6 –90 +90 mV
[L· BOOST]
Voltage gain VG
3VIN
= –30 dBm, boost: on/off –2.3 –3.8 –5.3 dB
Boost
BST
1VINBST
= –30 dBm, f = 100 Hz, boost: on 11.2 14.7 18.2 dB
BST
2VINBST
= –30 dBm, f = 10 Hz, boost: on 7.0 8.5 10 dB
Maximum output voltage V
O
max2 THD = 1%, boost: on 0.3 0.5 V
Total harmonic distortion THD
3VO
= 0.1 V, boost: on 0.04 0.5 %
Interchannel crosstalk CT
3VO
= –20 dBm, Rg = 0, boost: on 25 32 dB
Output noise voltage V
NO2
Rg = 0, BPF = 20 Hz to 20 kHz, boost: off 2.0 5.0 µV
Ripple rejection Rr3
Rg = 0, f
R
= 100 Hz, VR= –20 dBm,
45 53 dB
V
CC
= 1.8 V, boost: on
[L· BOOST + PVSS + POWER] R
V
= 30 kΩ max
Voltage gain VG
4VIN
= –40 dBm, f = 1 kHz, boost: on/off 22.0 24.5 28.0 dB
Low boost output voltage
V
O
1 VIN= –43 dBm, f = 100 Hz, boost: on 0.13 0.23 0.33 V
V
O
2 VIN= –28 dBm, f = 100 Hz, boost: on 0.25 0.4 0.55 V
Low boost total harmonic distortion THD
4VIN
= –40 dBm, f = 100 Hz, boost: on 0.5 1.2 %
PVSS voltage V
O
3 VIN= –40 dBm, PVSS2 –40 –37 –34 dBm
Input increment between the point where
PVSS width W
PVSS
operation starts and the point where the
30 40 dB
output is +4 dB from there.
PVSS: on
PVSS total harmonic distortion THD
5VIN
= –40 dBm, PVSS2 0.5 1.2 %
PVSS start input V
OPIN
PVSS2 –67 –63 –59 dBm
Operating Characteristics at Ta = 25°C, VCC= 3.0 V, fi = 1 kHz, 0.775 V = 0 dBm
RL= 10 kΩ (preamplifier), RL= 30 kΩ (low boost), RL= 16 Ω (power amplifier)
Note: The amount of boost for a 1-kHz signal.
Page 3
Block Diagram
No. 5701-3/6
LA4582CM
Unit (Resistance: Ω)
Page 4
Test Circuit
No. 5701-4/6
LA4582CM
Unit (Resistance: Ω, Capacitance: F)
LP.2
Page 5
Sample Application Circuit
No. 5701-5/6
LA4582CM
Unit (Resistance: Ω, Capacitance: F)
PRE. MUTE
Page 6
No. 5701-6/6
LA4582CM
This catalog provides information as of June, 1997. Specifications and information herein are subject to change
without notice.
■ 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.
■ Anyone purchasing any products described or contained herein for an above-mentioned use shall:
➀ 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:
➁ 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.
■ 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.
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