ba3131fs ROHM Co. Ltd., ba3131fs Datasheet

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ba3131fs

Manufacturer Part Number
ba3131fs
Description
Dual Operational Amplifier With Switch, For Audio Use
Manufacturer
ROHM Co. Ltd.
Datasheet

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Audio Accessory IC Series
OP Amp.
with 3 Inputs Selector
BA3131FS
Description
Features
Applications
Absolute maximum ratings (Ta=25°C)
Recommended operating conditions (Ta=25°C)
The BA3131FS incorporates two built-in circuits with Audio amplifiers, configured of three differential input circuits, an
output circuit, and a switch circuit. The three differential input circuits are separate, enabling independent settings to be
entered for the gain and frequency characteristics.
1)
2)
3)
4)
5)
Car stereos, audio amplifiers, and other electronic circuits
Power supply voltage
Power dissipation
Operating temperature
Storage temperature
Common-mode input voltage
Differential input voltage
Load current
Operating power
supply voltage
Reduced by 7.5 mW/°C over 25°C, when mounted on a glass epoxy board (90mm ×50mm × 1.6t)
High gain and low distortion. (Gv = 110dB, THD = 0.0015% typ.)
Low noise. (Vn = 2µVrms typ.)
Switching circuit can be directly coupled to microcomputer port.
Small switching noise.
Equipped with 1/2 Vcc output circuit for single power supply.
Parameter
Parameter
Symbol
Vcc
TECHNICAL NOTE
Symbol
Io
Tastg
Topr
Min.
Vcc
Vid
6.0
Pd
Vi
Max.
Typ.
8.0
Max.
16.0
-55-+125
-40-+85
±50.0
Limits
3-Vcc
750*
18.0
Vcc
Unit
V
single power
Conditions
source
Unit
mW
mA
V
V
V
Ver.B Oct.2005

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ba3131fs Summary of contents

Page 1

... Inputs Selector BA3131FS Description The BA3131FS incorporates two built-in circuits with Audio amplifiers, configured of three differential input circuits, an output circuit, and a switch circuit. The three differential input circuits are separate, enabling independent settings to be entered for the gain and frequency characteristics. ...

Page 2

Electrical characteristics (unless otherwise noted, Ta=25°C, Vcc=8V) Parameter Quiescent current Input offset voltage Input offset current Input bias current High-amplitude voltage gain Common-mode input voltage In-phase signal rejection ratio Power supply voltage rejection ratio Maximum output voltage Input conversion noise ...

Page 3

Block diagram Measurement circuit Fig.5 *C2 and C3 are used to prevent oscillation (adjustment required) Fig.6 3/8 ...

Page 4

Measurement conditions (Figure 6) Measurement Item Input offset voltage Input offset current Input bias current High-amplitude voltage gain Common-mode signal rejection ratio (Common-mode input voltage) Power supply voltage rejection ratio Equations (1) Input offset voltage (Vio) Vio = | VF1 ...

Page 5

Measurement circuits Fig.11 Slew rate ( II ) Fig.13 Input conversion noise voltage Fig.15 Total harmonic distortion Fig.17 Channel separation ( II ) Fig.12 Band width frequency gain Channel selection Fig.14 Crosstalk between A and B Fig.16 Channel separation ( ...

Page 6

Application example Truth value table ch1 SW1(8pin) H SW2(9pin) H ”H” when the applied voltage at pins 8 and 9 is 2.0V or more, and “L” when it is 1.0V or less. * Fig.18 ch2 ch3 OFF ...

Page 7

Cautions on use (1) Numbers and data in entries Numbers and data in entries are representative design values and are not guaranteed values of the items. (2) Example application circuit Although ROHM is confident that the example application circuit reflects ...

Page 8

... Order model name selection Product Name BA3131FS SSOP-A20 <Dimension> 8.7±0 0.15±0.1 0.1 0.8 0.36±0.1 The contents described herein are correct as of October, 2005 The contents described herein are subject to change without notice. For updates of the latest information, please contact and confirm with ROHM CO.,LTD. ...

Page 9

Appendix No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product ...

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