|
|
PDF AD8206 Data sheet ( Hoja de datos )
| Número de pieza | AD8206 | |
| Descripción | Bidirectional Current Shunt Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AD8206 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
|
No Preview Available !
Data Sheet
FEATURES
Ideal for current shunt applications
High common-mode voltage range
−2 V to +65 V operating
−25 V to +75 V survival
Gain = 20
Wide operating temperature range
−40°C to +125°C for Y grade and WY grade
−40°C to +150°C for WH grade
Bidirectional operation
Available in 8-lead SOIC
Qualified for automotive applications
EXCELLENT AC AND DC PERFORMANCE
15 µV/°C offset drift
30 ppm/°C gain drift
80 dB CMRR dc to 20 kHz
APPLICATIONS
High-side current sensing in
Motor controls
Transmission controls
Diesel-injection controls
Engine management
Suspension controls
Vehicle dynamic controls
DC-to-dc converters
High Common-Mode Voltage,
Bidirectional Current Shunt Amplifier
AD8206
FUNCTIONAL BLOCK DIAGRAM
V+
6
+IN 8
–IN 1
5 OUT
AD8206
7 VREF1
NC 4
NC = NO CONNECT
2
GND
Figure 1.
3 VREF2
GENERAL DESCRIPTION
The AD8206 is a single-supply difference amplifier for amplifying
small differential voltages in the presence of large common-mode
voltages. The operating input common-mode voltage range extends
from −2 V to +65 V. The typical single-supply voltage is 5 V.
The AD8206 is offered in an 8-lead SOIC package. The Y grade
and WY grade models are rated for operation from −40°C to
+125°C. The WH grade is rated from −40°C to +150°C.
Excellent DC performance over temperature keeps errors in the
measurement loop to a minimum. Offset drift is typically less
than 15 µV/°C, and gain drift is typically below 30 ppm/°C.
The output offset can be adjusted from 0.08 V to 4.7 V with a
5 V supply by using the VREF1 and VREF2 pins. With VREF1
attached to the V+ pin, and VREF2 attached to the GND pin, the
output is set at half scale. Attaching both pins to GND causes
the output to be unipolar, starting near ground. Attaching both
pins to V+ causes the output to be unipolar starting near V+.
Other offsets can be obtained by applying an external voltage to
the VREF1 and VREF2 pins.
Rev. C
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2005–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD8206
Data Sheet
Parameter
POWER SUPPLY
Operating Range
Quiescent Current Over Temperature
Power Supply Rejection Ratio
OPERATING TEMPERATURE RANGE
For Specified Performance
Test Conditions/Comments
AD8206YRZ, VO = 0.1 V dc
AD8206WYRZ, VO = 0.1 V dc
AD8206WHRZ, VO = 0.1 V dc
AD8206YRZ
AD8206WYRZ
AD8206WHRZ
AD8206 SOIC
Min Typ Max
4.5 5.5
2
2
2.2
70
−40 +125
−40 +125
−40 +150
1 Input voltage range = ±125 mV with half-scale offset.
2 Source imbalance < 2 Ω.
3 The offset adjustment is ratiometric to the power supply when VREF1 and VREF2 are used as a divider between the supplies.
Unit
V
mA
mA
mA
dB
°C
°C
°C
Rev. C | Page 4 of 13
5 Page 
AD8206
OUTPUT OFFSET ADJUSTMENT
The output of the AD8206 can be adjusted for unidirectional or
bidirectional operation.
UNIDIRECTIONAL OPERATION
Unidirectional operation allows the AD8206 to measure
currents through a resistive shunt in one direction. The basic
modes for unidirectional operation are ground referenced
output mode and V+ referenced output mode.
For unidirectional operation, the output can be set at the
negative rail (near ground) or at the positive rail (near V+)
when the differential input is 0 V. The output moves to the
opposite rail when a correct polarity differential input voltage is
applied. In this case, full scale is approximately 250 mV. The
required polarity of the differential input depends on the output
voltage setting. If the output is set at the positive rail, the input
polarity needs to be negative to move the output down. If the
output is set at ground, the polarity is positive to move the
output up.
GROUND REFERENCED OUTPUT
When using the AD8206 in this mode, both referenced inputs are
tied to ground, which causes the output to sit at the negative rail
when there are zero differential volts at the input (see Figure 17).
+IN
–IN
AD8206
V+
OUT
VREF1
NC
NC = NO CONNECT
GND
VREF2
Figure 17. Ground Referenced Output
Table 4. V+ = 5 V
VIN (Referred to −IN)
0V
250 mV
VO
0.08 V
4.7 V
Data Sheet
V+ REFERENCED OUTPUT
This mode is set when both reference pins are tied to the
positive supply. It is typically used when the diagnostic scheme
requires detection of the amplifier and the wiring before power
is applied to the load (see Figure 18).
+IN
–IN
AD8206
V+
OUT
VREF1
NC
NC = NO CONNECT
GND
VREF2
Figure 18. V+ Referenced Output
Table 5. V+ = 5 V
VIN (Referred to −IN)
0V
−250 mV
VO
4.7 V
0.08 V
BIDIRECTIONAL OPERATION
Bidirectional operation allows the AD8206 to measure currents
through a resistive shunt in two directions.
In this case, the output is set anywhere within the output range.
Typically, it is set at half-scale for equal range in both directions.
In some cases, however, it is set at a voltage other than half-scale
when the bidirectional current is nonsymmetrical.
Table 6. V+ = 5 V, VO = 2.5 V with VIN = 0 V
VIN (Referred to −IN)
VO
+100 mV
4.5 V
−100 mV
0.5 V
Adjusting the output is accomplished by applying voltage(s) to
the referenced inputs.
VREF1 and VREF2 are tied to internal resistors that connect to an
internal offset node. There is no operational difference between
the pins.
Rev. C | Page 10 of 13
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet AD8206.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AD820 | FET Input Op Amp | Analog Devices |
| AD8200 | High Common-Mode Voltage/ Single Supply Difference Amplifier | Analog Devices |
| AD8202 | Single-Supply Difference Amplifier | Analog Devices |
| AD8203 | Single-Supply Difference Amplifier | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |