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PDF AD8219 Data sheet ( Hoja de datos )
| Número de pieza | AD8219 | |
| Descripción | Unidirectional Current Shunt Monitor | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AD8219 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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FEATURES
High common-mode voltage range
4 V to 80 V operating
−0.3 V to +85 V survival
Buffered output voltage
Gain = 60 V/V
Wide operating temperature range: −40°C to +125°C
Excellent ac and dc performance
±100 nV/°C typical offset drift
±50 µV/°C typical offset
±5 ppm/°C typical gain drift
110 dB typical CMRR at dc
APPLICATIONS
High-side current sensing
48 V telecom
Power management
Base stations
Unidirectional motor control
Precision high voltage current sources
GENERAL DESCRIPTION
The AD8219 is a high voltage, high resolution, current shunt
amplifier. It features a set gain of 60 V/V, with a maximum
±0.3% gain error over the entire temperature range. The
buffered output voltage directly interfaces with any typical
converter. The AD8219 offers excellent input common-mode
rejection from 4 V to 80 V. The AD8219 performs unidirectional
current measurements across a shunt resistor in a variety of
industrial and telecom applications including motor control,
power management, and base station power amplifier bias
control.
Zero Drift, Unidirectional
Current Shunt Monitor
AD8219
FUNCTIONAL BLOCK DIAGRAM
VS
R4
LDO
R1
–IN
+IN
R2
AD8219
R3
OUT
GND
Figure 1.
The AD8219 offers breakthrough performance throughout
the −40°C to +125°C temperature range. It features a zero
drift core, which leads to a typical offset drift of ±100 nV/°C
throughout the operating temperature and common-mode
voltage range. Special attention is devoted to output linearity
being maintained throughout the input differential voltage range,
regardless of the common-mode voltage present, while the
typical input offset voltage is ±50 µV.
The AD8219 is offered in a 8-lead MSOP package.
Rev. 0
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
www.analog.com
Fax: 781.461.3113
©2011 Analog Devices, Inc. All rights reserved.
Free Datasheet http://www.datasheet4u.com/
1 page  
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 3. Pin Function Descriptions
Pin No.
Mnemonic
1 +IN
2 VS
3 NC
4 GND
5 OUT
6 NC
7 NC
8 −IN
+IN 1
VS 2
NC 3
GND 4
AD8219
TOP VIEW
(Not to Scale)
8 –IN
7 NC
6 NC
5 OUT
NC = NO CONNECT.
DO NOT CONNECT TO THIS PIN.
Figure 2. Pin Configuration
Description
Noninverting Input.
Supply Pin. Bypass with a standard 0.1 μF capacitor.
Do Not Connect to This Pin.
Ground.
Output.
Do Not Connect to This Pin.
Do Not Connect to This Pin.
Inverting Input.
AD8219
Rev. 0 | Page 5 of 16
Free Datasheet http://www.datasheet4u.com/
5 Page 
APPLICATION INFORMATION
OUTPUT LINEARITY
In all current sensing applications 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 AD8219
maintains a very high input-to-output linearity even when the
differential input voltage is very small.
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 1 2 3 4 5 6 7 8 9 10
DIFFERENTIAL INPUT VOLTAGE (mV)
Figure 27. Typical Gain Linearity at Small Differential Inputs
(VCM = 4 V to 80 V)
AD8219
Regardless of the common mode, the AD8219 provides a
correct output voltage when the input differential is at least
1 mV. The ability of the AD8219 to work with very small
differential inputs, regardless of the common-mode voltage,
allows for optimal dynamic range, accuracy, and flexibility in
any current sensing application.
Rev. 0 | Page 11 of 16
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AD8219.PDF ] | |
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