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PDF AD8211 Data sheet ( Hoja de datos )
| Número de pieza | AD8211 | |
| Descripción | High Voltage Current Shunt Monitor | |
| Fabricantes | Analog Devices | |
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Hay una vista previa y un enlace de descarga de AD8211 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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Data Sheet
FEATURES
Qualified for automotive applications
±4000 V human body model (HBM) electrostatic discharge (ESD)
High common-mode input voltage range: −2 V to +65 V
Continuous input voltage range: −3 V to +68 V
Buffered output voltage
Wide operating temperature range
5-lead SOT: −40°C to +125°C
Excellent ac and dc performance
5 µV/°C typical offset drift
−13 ppm/°C typical gain vs. temperature
120 dB typical common-mode rejection ratio (CMRR) at dc
APPLICATIONS
High-side current sensing
Motor controls
Transmission controls
Engine management
Suspension controls
Vehicle dynamic controls
DC-to-dc converters
GENERAL DESCRIPTION
The AD8211 is a high voltage, precision current shunt amplifier. It
features a set gain of 20 V/V, with a typical ±0.35% gain error
over the entire temperature range. The buffered output voltage
directly interfaces with any typical converter. Excellent common-
mode rejection from −2 V to +65 V is independent of the 5 V
supply. The AD8211 performs unidirectional current measurements
across a shunt resistor in a variety of industrial and automotive
applications, such as motor control, solenoid control, or battery
management.
High Voltage,
Current Shunt Monitor
AD8211
FUNCTIONAL BLOCK DIAGRAM
VIN+
VIN–
A1
PROPRIETARY
OFFSET
CIRCUITRY
V+
G = +20
OUT
AD8211
GND
Figure 1.
Special circuitry is devoted to output linearity being maintained
throughout the input differential voltage range of 0 mV to 250 mV,
regardless of the common-mode voltage present. The AD8211
has an operating temperature range of −40°C to +125°C and is
offered in a small 5-lead SOT package.
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 ©2007–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
12
5
AD8211
OUT 1
5 V+
AD8211
GND 2 TOP VIEW
(Not to Scale)
VIN+ 3
4 VIN–
Figure 3. Pin Configuration
34
Figure 2. Metallization Diagram
Table 3. Pin Function Descriptions
Pin No.
Mnemonic X
1 OUT −277
2
GND
−140
3 VIN+
−228
4 VIN−
+229
5 V+
+264
Y
+466
+466
−519
−519
+466
Description
Buffered Output
Ground
Noninverting Input
Inverting Input
Supply
Rev. C | Page 5 of 13
5 Page 
Data Sheet
APPLICATION NOTES
OUTPUT LINEARITY
In all current sensing applications, and especially in automotive
and industrial environments where the common-mode voltage
can vary significantly, it is important that the current sensor
maintain the specified output linearity, regardless of the input
differential or common-mode voltage. The AD8211 contains
specific circuitry on the input stage, which ensures that even
when the differential input voltage is very small, and the
common-mode voltage is also low (below the 5 V supply),
the input-to-output linearity is maintained. Figure 24 shows
the input differential voltage vs. the corresponding output
voltage at different common modes.
200
180
160
140
120
100
80
60
40 IDEAL VOUT (mV)
20
VOUT (mV) @ VCM = 0V
VOUT (mV) @ VCM = 65V
0
0 1 2 3 4 5 6 7 8 9 10
DIFFERENTIAL INPUT VOLTAGE (mV)
Figure 24. Gain Linearity Due to Differential and Common-Mode Voltage
AD8211
Regardless of the common mode voltage, the AD8211 provides
a correct output voltage when the input differential is at least
2 mV, which is due to the voltage range of the output amplifier
that can go as low as 33 mV typical. The specified minimum
output amplifier voltage is 100 mV to provide sufficient guard
bands. The ability of the AD8211 to work with very small
differential inputs, regardless of the common-mode voltage,
allows for additional dynamic range, accuracy, and flexibility in
any current sensing application.
Rev. C | Page 11 of 13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet AD8211.PDF ] | |
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