Ordering number : ENN6950A
Monolithic Linear IC
LA2900M
Two-Channel High-Output Line Amplifier
for Car Audio Systems
Overview
The LA2900M is a 2-channel high-output line amplifier
IC developed for use in car audio systems. It can provide
significant improvements in the signal-to-noise ratio when
used to drive an external power amplifier due to its
significantly increased output voltage as compared to that
of earlier preamplifiers.
The high output of the LA2900M allows it to achieve a
high signal-to-noise ratio and excellent fidelity in audio
systems in which the main unit is connected to an external
amplifier, and can improve the performance of the power
amplifier in such systems.
Package Dimensions
unit: mm
3036C-MFP20
[LA2900M]
20
11
12.5
0.15
•
•
•
•
•
High output level (5.3 V rms)
Low output noise voltage (12 µV)
Low total harmonic distortion (0.003%)
High ripple rejection ratio (70 dB)
Excellent audio fidelity
0.35
1.27
SANYO: MFP20 (300mil)
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
V
CC
max
Pd max
Topr
Tstg
With no input signal
Ta
≤
85°C, Mounted on a printed circuit board
(114.3
×
76.1
×
1.6 mm
3
, glass epoxy)
Conditions
Ratings
12
400
–40 to +85
–40 to +150
Unit
V
mW
°C
°C
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.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
N1501TN (OT)/51101RM (OT) No. 6950-1/5
0.1
Functions and Features
(0.4)
0.63
1
10
(1.5)
1.7max
5.4
7.6
LA2900M
Recommended Operating Conditions
at Ta = 25°C
Parameter
Recommended operating voltage
Allowable operating supply voltage range
Recommended load resistance
Symbol
V
CC
V
CCOP
RL
OP
Conditions
Ratings
9
6 to 12
10
Unit
V
V
kΩ
Electrical Characteristics
at Ta = 25°C, V
CC
= 9 V, RL = 10 kΩ, f = 1 kHz, Rg = 600Ω
Parameter
Quiescent current
Voltage gain
Output voltage
Total harmonic distortion
Output noise voltage
Ripple rejection ratio
Channel separation
Input resistance
Symbol
I
CCO
V
G
V
O
THD
V
NO
SVRR
CH
sep
Ri
Rg = 0
V
O
= 0 dBm
THD = 0.1%
V
O
= 3 Vrms, LPF = 80 kHz
Rg = 0, BPF = 20 Hz to 20 kHz
Rg = 0, f
R
= 1 kHz, V
CCR
= 100 mV,
BPF = 20 Hz to 20 kHz
Rg = 10 kΩ, V
O
= 1 Vrms
60
60
20
Conditions
Ratings
min
7
7.5
5.0
typ
11
8
5.3
0.003
12
70
70
30
39
0.01
17
max
15
8.5
Unit
mA
dB
Vrms
%
µVrms
dB
dB
kΩ
No. 6950-2/5
LA2900M
Block Diagram
36kΩ
2
36kΩ
19
24kΩ
--
LIFT
+
18
AMP
VCC
C10
1.5µF
+
C9
100µF
C11
0.1µF
+
--
4
+
--
30kΩ
+
SIG
--
AMP
VREF
OUT1
16
+
C8
22µF
RL 10kΩ
C5
100µF
ILA00765
C1
22µF
+
+
3
220Ω C7
1.5µF
17
VIN1
5
24kΩ
14
9
36kΩ
12
24kΩ
--
LIFT
+
13
C6
1.5µF
+
+
+
47µF
7
+
--
C2 22µF
+
+
VIN2
6
VREF
30kΩ
--
8
220Ω
C3
1.5µF
Pin Assignment
LIFTout1
LIFTout2
LIFTVD1
LIFTVD2
SIGout1
SIGout2
GND1
GND2
24kΩ
36kΩ
20
19
18
17
16
15
14
13
12
11
LA2900M
Top view
1
2
VCC1
3
IN1
4
DC1
5
NF1
6
NF2
7
DC2
8
IN2
9
VCC2
10
ILA00766
RL 10kΩ
+
SIG
--
OUT2
15
+
C4
22µF
No. 6950-3/5
LA2900M
VO -- VCC
Total harmonic distortion, THD -- %
f=1kHz
VG=8.0dB
RL=10kΩ
THD=0.1%
LPF=80kHz
7
6
1.0
7
5
3
2
0.1
7
5
3
2
0.01
7
5
3
2
THD -- VO
VCC=9V
VG=8.0dB
RL=10kΩ
LPF=80kHz
Rg=600Ω
Output voltage, VO – V
5
4
3
f=10
kHz
2
1
0
2
4
6
8
10
12
ILA00767
f=1kHz
f=100Hz
0
1
2
3
4
5
6
ILA00768
Supply voltage, VCC -- V
24
Output voltage, VO -- Vrms
0
VNO -- VCC
Ripple rejection ratio, SVRR -- dB
VG=8.0dB
DIN=AUDIO(20 to 20kHz)
Rg=0
RL=10kΩ
SVRR -- Frequency
VCC=9V
Rg=0
VCCR=100mV
DIN=AUDIO
RL=10kΩ
VG=8.0dB
Output noise voltage, VNO --
µV
22
20
--20
18
--40
16
14
--60
12
10
4
6
8
10
12
14
ILA00769
--80
100
2
3
5
7
1k
2
3
5
Supply voltage, VCC -- V
5
4
3
2
Frequency, f -- Hz
10k
ILA00770
7
Frequency Characteristics
VCC=9V
VO=0dBm
VG=8.0dB
RL=10kΩ
0
Separation -- Frequency
VCC=9V
RL=10kΩ
VG=8.0dB
Rg=10kΩ
--20
1
Separation, Sep -- dB
Response -- dB
--40
Converted to 0 dB = VG 8.0 dB
0
--1
--2
--3
--4
--5
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
2 3
--60
VO=1V
--80
VO=3V
--100
Frequency, f -- Hz
5 7100k
ILA00771
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
2 3
5
Frequency, f -- Hz
ILA00772
No. 6950-4/5
LA2900M
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer’s
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer’s products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products (including technical data, services) described or contained
herein are controlled under any of applicable local export control laws and regulations, such products must
not be exported without obtaining the export license from the authorities concerned in accordance with the
above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification”
for the SANYO product that you intend to use.
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 November, 2001. Specifications and information herein are
subject to change without notice.
PS No. 6950-5/5
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