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

X  

AD8208WBRZ-RL Datasheet(PDF) 10 Page - Analog Devices

No. de pieza AD8208WBRZ-RL
Descripción Electrónicos  High Voltage, Precision Difference Amplifier
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
Logo AD - Analog Devices

AD8208WBRZ-RL Datasheet(HTML) 10 Page - Analog Devices

Back Button AD8208WBRZ-RL Datasheet HTML 6Page - Analog Devices AD8208WBRZ-RL Datasheet HTML 7Page - Analog Devices AD8208WBRZ-RL Datasheet HTML 8Page - Analog Devices AD8208WBRZ-RL Datasheet HTML 9Page - Analog Devices AD8208WBRZ-RL Datasheet HTML 10Page - Analog Devices AD8208WBRZ-RL Datasheet HTML 11Page - Analog Devices AD8208WBRZ-RL Datasheet HTML 12Page - Analog Devices AD8208WBRZ-RL Datasheet HTML 13Page - Analog Devices AD8208WBRZ-RL Datasheet HTML 14Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 16 page
background image
AD8208
Rev. A | Page 10 of 16
THEORY OF OPERATION
The AD8208 is a single-supply difference amplifier typically used
to amplify a small differential voltage in the presence of rapidly
changing, high common-mode voltages.
The AD8208 consists of two amplifiers (A1 and A2), a resistor
network, a small voltage reference, and a bias circuit (not shown);
see Figure 24.
The set of input attenuators preceding A1 consists of RA, RB, and
RC, which feature a combined series resistance of approximately
400 kΩ ± 20%. The purpose of these resistors is to attenuate the
input voltage to match the input voltage range of A1. This balanced
resistor network attenuates the common-mode signal by a ratio
of 1/14. The A1 amplifier inputs are held within the power supply
range, even as Pin 1 and Pin 8 exceed the supply or fall below the
common (ground). A reference voltage of 350 mV biases the
attenuator above ground, allowing Amplifier A1 to operate in
the presence of negative common-mode voltages.
The input resistor network also attenuates normal (differential)
mode voltages. Therefore, A1 features a gain of 140 V/V to provide
a total system gain, from ±IN to the output of A1, equal to 10
V/V, as shown in the following equation:
Gain (A1) = 1/14 (V/V) × 140(V/V) = 10 V/V
A precision trimmed, 100 kΩ resistor is placed in series with the
output of Amplifier A1. The user has access to this resistor via
an external pin (A1). A low-pass filter can be easily implemented
by connecting A1 to A2 and placing a capacitor to ground (see
Figure 33).
The value of RF1 and RF2 is 10 kΩ, providing a gain of 2 V/V for
Amplifier A2. When connecting Pin A1 and Pin A2 together, the
AD8208 provides a total system gain equal to
Total Gain of (A1 + A2) (V/V) = 10 (V/V) × 2 (V/V) = 20 V/V
at the output of A2 (the OUT pin).
The ratios of RA, RB, RC, and RF are trimmed to a high level of
precision, allowing a typical CMRR value that exceeds 80 dB. This
performance is accomplished by laser trimming the resistor ratio
matching to better than 0.01%.
OUT
GND
VS
RC
RF
–IN
350mV
+
RB
RB
RA
RA
RC
RF
RG
RFILTER
RM
A1
A2
+IN
A1
A2
+
RF1
RF2
Figure 24. Simplified Schematic


Número de pieza similar - AD8208WBRZ-RL

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Analog Devices
AD8208WBRZ-RL AD-AD8208WBRZ-RL Datasheet
344Kb / 20P
   High Voltage, Precision Difference Amplifier
Rev. C
More results

Descripción similar - AD8208WBRZ-RL

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Analog Devices
AD8209 AD-AD8209_16 Datasheet
364Kb / 16P
   High Voltage, Precision Difference Amplifier
AD8202-KGD AD-AD8202-KGD Datasheet
143Kb / 8P
   High Voltage, Precision Difference Amplifier
Rev. 0
AD8209 AD-AD8209 Datasheet
318Kb / 16P
   High Voltage, Precision Difference Amplifier
REV. 0
AD8209A AD-AD8209A Datasheet
454Kb / 15P
   High Voltage, Precision Difference Amplifier
AD8208 AD-AD8208_V01 Datasheet
344Kb / 20P
   High Voltage, Precision Difference Amplifier
Rev. C
logo
Texas Instruments
LMP8275 TI1-LMP8275 Datasheet
392Kb / 15P
[Old version datasheet]   Precision Voltage Difference Amplifier
LMP8270 TI1-LMP8270 Datasheet
438Kb / 17P
[Old version datasheet]   Precision Voltage Difference Amplifier
LMP8272 TI1-LMP8272 Datasheet
357Kb / 16P
[Old version datasheet]   Precision Voltage Difference Amplifier
LMP8276 TI1-LMP8276 Datasheet
412Kb / 16P
[Old version datasheet]   Bidirectional Precision Voltage Difference Amplifier
LMP8271 TI1-LMP8271 Datasheet
449Kb / 17P
[Old version datasheet]   Bidirectional Precision Voltage Difference Amplifier
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


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