Datasheet LA2900M Datasheet (SANYO)

Ordering number : ENN6950A

N1501TN (OT)/51101RM (OT) No. 6950-1/5

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.

Functions and Features

• 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

Package Dimensions

unit: mm

3036C-MFP20

1

20

10

11

12.5

0.15

1.27

0.35

(0.4)

1.7max

(1.5)

0.1

5.4

0.63

7.6

SANYO: MFP20 (300mil)

[LA2900M]

LA2900M

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Two-Channel High-Output Line Amplifier

for Car Audio Systems

Monolithic Linear IC

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.

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

CC

max With no input signal 12 V

Allowable power dissipation Pd max

Ta ≤ 85°C, Mounted on a printed circuit board

400 mW

(114.3 × 76.1 × 1.6 mm3, glass epoxy)
Operating temperature Topr –40 to +85 °C
Storage temperature Tstg –40 to +150 °C

Specifications

Maximum Ratings at Ta = 25°C

No. 6950-2/5

LA2900M

Parameter Symbol Conditions

Ratings

Unit

min typ max

Quiescent current I

CCO

Rg = 0 7 11 15 mA

Voltage gain V

G

VO= 0 dBm 7.5 8 8.5 dB

Output voltage V

O

THD = 0.1% 5.0 5.3 Vrms

Total harmonic distortion THD V

O

= 3 Vrms, LPF = 80 kHz 0.003 0.01 %

Output noise voltage V

NO

Rg = 0, BPF = 20 Hz to 20 kHz 12 17 µVrms

Ripple rejection ratio SVRR

Rg = 0, f

R

= 1 kHz, V

CCR

= 100 mV,

60 70 dB

BPF = 20 Hz to 20 kHz

Channel separation CH

sep

Rg = 10 kΩ, VO= 1 Vrms 60 70 dB

Input resistance Ri 20 30 39 kΩ

Electrical Characteristics at Ta = 25°C, VCC= 9 V, RL = 10 kΩ, f = 1 kHz, Rg = 600Ω

Parameter Symbol Conditions Ratings Unit

Recommended operating voltage V

CC

9 V

Allowable operating supply voltage range V

CCOP

6 to 12 V

Recommended load resistance RL

OP

10 kΩ

Recommended Operating Conditions at Ta = 25°C

No. 6950-3/5

LA2900M

Block Diagram

36kΩ

C1

22µF

+

+

VIN1

24kΩ

+

--

+

--

+

--

+

--

36kΩ

24kΩ

30kΩ

--

--

+

+

V

CC

C10

1.5µF

C11

0.1µF

+

C9
100µF

OUT1

220Ω

C8

22µF

+
C7

RL 10kΩ

1.5µF

V

REF

47µF

+

C2

22µF

+

+

VIN2

24kΩ

V

REF

24kΩ

30kΩ

36kΩ

36kΩ

-­+

+

--

C6

1.5µF

+

C5
100µF

OUT2

C4

22µF

+

C3

1.5µF

RL10kΩ

220Ω

LIFT

AMP

AMP

SIG

LIFT

SIG

ILA00765

4

3

5

6

8

7

17

19

18

16

2

15

13

12

9

14

Pin Assignment

10

11

9

12

8

13

7

14

6

15

5

16

4

17

3

18

2

19

1

20

ILA00766

V

CC

1

IN1

DC1

NF1

NF2

DC2

IN2

V

CC

2

LIFT

VD

1

LIFTout1

GND1

SIGout1

SIGout2

GND2

LIFTout2

LIFT

VD

2

Top view

LA2900M

No. 6950-4/5

LA2900M

2 4 6 8 10 12

0

2

3

4

5

6

7

1

Supply voltage, V

CC

-- V

ILA00767

ILA00769

ILA00771

ILA00768

ILA00770

ILA00772

Output voltage, V

O

– V

f=1kHz
VG=8.0dB
RL=10kΩ
THD=0.1%
LPF=80kHz

0 1 2 3 4 5 6

2

5

7

0.01

2

3

5

3

0.1

2

3

5

7

1.0

7

Output voltage, V

O

-- Vrms

THD -- V

O

Total harmonic distortion, THD

-- %

f=10kHz

f=1kHz

f=100Hz

Supply voltage, V

CC

-- V

Frequency, f -- Hz

Output noise voltage, V

NO

-- µV

4 6 8 10 12 14

10

14

16

18

20

22

24

12

Frequency, f -- Hz

SVRR -- Frequency

Ripple rejection ratio, S

VRR

-- dB

Frequency, f -- Hz

Separation -- Frequency

Separation, Sep

-- dB

100

2 3 5 7

1k

2 3 5 7

10k

--80

--60

--40

--20

0

--100

--80

--60

--40

--20

0

Frequency Characteristics

VO -- V

CC

VNO -- V

CC

Response

-- dB

2 3 5 7

100

2 3 5 71k2 3 5 7

10k

2 3 5 7

100k

2 3 5 7

100

2 3 5 7

1k

2 3 5

10k

7 2 3 5

0

--1

--2

--3

--4

--5

1

2

3

4

5

Converted to 0 dB = VG 8.0 dB

VCC=9V
RL=10kΩ
VG=8.0dB
Rg=10kΩ

VCC=9V
VO=0dBm
VG=8.0dB
RL=10kΩ

VCC=9V
Rg=0
VCCR=100mV
DIN=AUDIO
RL=10kΩ
VG=8.0dB

VG=8.0dB
DIN=AUDIO(20 to 20kHz)
Rg=0
RL=10kΩ

VCC=9V
VG=8.0dB
RL=10kΩ
LPF=80kHz
Rg=600Ω

VO=1V
VO=3V

PS No. 6950-5/5

LA2900M

This catalog provides information as of November, 2001. Specifications and information herein are
subject to change without notice.

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.