Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

BA3121 Datasheet(PDF) 5 Page - Rohm

No. de pieza BA3121
Descripción Electrónicos  Ground isolation amplifier
Download  11 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  ROHM [Rohm]
Página de inicio  http://www.rohm.com
Logo ROHM - Rohm

BA3121 Datasheet(HTML) 5 Page - Rohm

  BA3121 Datasheet HTML 1Page - Rohm BA3121 Datasheet HTML 2Page - Rohm BA3121 Datasheet HTML 3Page - Rohm BA3121 Datasheet HTML 4Page - Rohm BA3121 Datasheet HTML 5Page - Rohm BA3121 Datasheet HTML 6Page - Rohm BA3121 Datasheet HTML 7Page - Rohm BA3121 Datasheet HTML 8Page - Rohm BA3121 Datasheet HTML 9Page - Rohm Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 11 page
background image
Vi =
R4
(R3
)R4)
S e2
eO =
*
R1
)R2
R1
S Vi
R2
R1
e1
)
eO =
*
R1
)R2
R1
S e2
R2
R1
e1
)
eO =
*
R1R4
*R2R3
R1 (R3
)R4)
S e2
R2
R1
S (e1*e2) )
R4
(R3
)R4)
S
1
2
721
Audio ICs
BA3121 / BA3121F / BA3121N
FCircuit operation
Car-audio systems are earthed to the car body, and for
this reason, electrical noise generated by the car elec-
trics can enter the power amplifier input via the chassis,
and become audible.
The BA3121 makes use of the common-mode rejection
characteristics of an operational amplifier to eliminate
this noise. Without the BA3121 noise enters the power
amplifier input directly, when used, the CMMR of opera-
tional amplifiers 1-A and 2-A eliminates the noise.
Principles of noise elimination:
To obtain the output voltage (eO)
From 1 and 2
Ideally, if R1R4 = R2R3, and e1 = e2, the noise voltage will
become zero. However, due to mismatching between the
resistors, difference in the noise voltages (e1 and e2), and
tolerances in the operational amplifier, a noise voltage
does result.
With the BA3121, the elimination level of the noise is ex-
pressed as: CMMR = 20log (eO /ei) (ei = e1 = e2)
Therefore, CMRR
y 41dB can be guaranteed.
FOperation notes
(1)
Maintain a ratio of 2: 1 for the values of the capaci-
tors connected to pin 2 (Vm1) and pin 6 (Vm2) to keep the
ripple rejection ratio stable. If this ratio is maintained, the
ripple rejection ratio will not vary significantly even if the
capacitance values are halved.
(2)
If the value of the capacitor connected to pin 2 (Vm1)
in the example is doubled, the bass-region CMMR will be
+6dB, and if it is halved, it will be
*6dB (see Fig. 16).


Número de pieza similar - BA3121

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Rohm
BA3121F ROHM-BA3121F Datasheet
164Kb / 6P
   Ground isolation amplifier for car audio systems
BA3121F ROHM-BA3121F Datasheet
338Kb / 9P
   Ground Isolation Amplifier
BA3121F ROHM-BA3121F Datasheet
1Mb / 16P
   Ground Isolation Amplifier
BA3121F-E2 ROHM-BA3121F-E2 Datasheet
348Kb / 9P
   Ground Isolation Amplifier
BA3121F-E2 ROHM-BA3121F-E2 Datasheet
1Mb / 16P
   Ground Isolation Amplifier
More results

Descripción similar - BA3121

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Rohm
BA3121F ROHM-BA3121F_09 Datasheet
338Kb / 9P
   Ground Isolation Amplifier
BA3121F ROHM-BA3121F_15 Datasheet
1Mb / 16P
   Ground Isolation Amplifier
BA3123F ROHM-BA3123F_15 Datasheet
1Mb / 16P
   Ground Isolation Amplifier
BA3121F-E2 ROHM-BA3121F-E2 Datasheet
348Kb / 9P
   Ground Isolation Amplifier
logo
New Japan Radio
NJM2794 NJRC-NJM2794 Datasheet
177Kb / 11P
   Ground Noise Isolation Amplifier
logo
Shenzhenshi YONGFUKANG ...
D3121 YONGFUKANG-D3121 Datasheet
298Kb / 8P
   Ground isolation amplifier circuit
logo
NXP Semiconductors
TDA8575 PHILIPS-TDA8575 Datasheet
114Kb / 16P
   Ground noise isolation amplifier
1996 Jul 29
logo
List of Unclassifed Man...
NJM2794RB2-TE1 ETC2-NJM2794RB2-TE1 Datasheet
210Kb / 11P
   Ground Noise Isolation Amplifier
logo
Rohm
BA3121F ROHM-BA3121F Datasheet
164Kb / 6P
   Ground isolation amplifier for car audio systems
logo
New Japan Radio
NJM2795 NJRC-NJM2795 Datasheet
129Kb / 6P
   Ground noise isolation Amplifier with Adjustable Differential Gain
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com