AD8202 Analog Devices, AD8202 Datasheet

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AD8202

Manufacturer Part Number
AD8202
Description
High Common-Mode Voltage, Single-Supply Difference Amplifier
Manufacturer
Analog Devices
Datasheet

Specifications of AD8202

Filter Option
Yes
Common Mode Input (v)min
--8V
Common Mode Input (v)max
+28V
Bandwidth G=10 (khz Typ)
50kHz
Cmrr (db)
82dB
Vcc-vee
3.5V to 12V

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Data Sheet
FEATURES
High common-mode voltage range
Operating temperature range: −40°C to +125°C
Supply voltage range: 3.5 V to 12 V
Low-pass filter (1-pole or 2-pole)
Excellent ac and dc performance
Qualified for automotive applications
APPLICATIONS
Transmission control
Diesel injection control
Engine management
Adaptive suspension control
Vehicle dynamics control
GENERAL DESCRIPTION
The
and low-pass filtering small differential voltages in the presence of a
large common-mode voltage (CMV). The input CMV range
extends from −8 V to +28 V at a typical supply voltage of 5 V.
The
and SOIC packages are specified over a wide temperature range,
from −40°C to +125°C, making the
in many automotive platforms.
Automotive platforms demand precision components for
better system control. The
dc performance keeping errors to a minimum in the user’s
system. Typical offset and gain drift in the SOIC package are
0.3 µV/°C and 1 ppm/°C, respectively. Typical offset and gain
drift in the MSOP package are 2 µV/°C and 1 ppm/°C, respec-
tively. The device also delivers a minimum CMRR of 80 dB
from dc to 10 kHz.
The
at the output of the Preamp A1 that can be used for low-pass
filter applications and for establishing gains other than 20.
Rev. E
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.
Trademarks and registered trademarks are the property of their respective owners.
−8 V to +28 V at a 5 V supply voltage
±1 mV voltage offset
±1 ppm/°C typical gain drift
80 dB CMRR min dc to 10 kHz
AD8202
AD8202
AD8202
is a single-supply difference amplifier for amplifying
is available in die and packaged form. The MSOP
features an externally accessible 100 kΩ resistor
AD8202
provides excellent ac and
AD8202
well-suited for use
Single-Supply Difference Amplifier
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
+IN
–IN
BATTERY
BATTERY
High Common-Mode Voltage,
8
1
NC = NO CONNECT
200kΩ
FUNCTIONAL BLOCK DIAGRAMS
COMMON
14V
14V
CLAMP
CLAMP
DIODE
DIODE
200kΩ
NC
COMMON
7
Figure 1. SOIC (R) Package Die Form
Figure 2. High Line Current Sensor
© 2005-2011 Analog Devices, Inc. All rights reserved.
Figure 3. Low Line Current Sensor
+IN
–IN
POWER
DEVICE
G = ×10
A1
4-TERM
4-TERM
SHUNT
SHUNT
100kΩ
A1
INDUCTIVE
LOAD
POWER
DEVICE
INDUCTIVE
LOAD
3
A2
+IN
–IN
+IN
–IN
4
AD8202
AD8202
GND
GND
NC
NC
+IN
–IN
G = ×2
A2
+V
+V
+V
5V
5V
6
A1
A1
NC = NO CONNECT
NC = NO CONNECT
S
S
S
AD8202
OUT
OUT
www.analog.com
A2
A2
10kΩ
10kΩ
AD8202
GND
2
OUTPUT
OUTPUT
5
OUT

Related parts for AD8202

AD8202 Summary of contents

Page 1

... BATTERY One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 AD8202 FUNCTIONAL BLOCK DIAGRAMS AD8202 100kΩ × ×2 +IN + –IN –IN 10kΩ 200kΩ 10kΩ Figure 1. SOIC (R) Package Die Form INDUCTIVE ...

Page 2

... AD8202 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagrams ............................................................. 1 Specifications ..................................................................................... 3 Single Supply ................................................................................. 3 Absolute Maximum Ratings ............................................................ 4 ESD Caution .................................................................................. 4 Pin Configuration and Function Descriptions ............................. 5 Typical Performance Characteristics ............................................. 6 Theory of Operation ...................................................................... 12 REVISION HISTORY 10/11—Rev Rev. E Change to Features Section ............................................................. 1 Changes to Ordering Guide .......................................................... 17 Updated Outline Dimensions ....................................................... 17 Added Automotive Products Section .......................................... 17 11/05— ...

Page 3

... The AD8202 preamplifier exceeds 80 dB CMRR at 10 kHz. However, because the signal is available only by way of a 100 kΩ resistor, even the small amount of pin-to- pin capacitance between Pin 1, Pin 8 and Pin 3, Pin 4 might couple an input common-mode signal larger than the greatly attenuated preamplifier output. The effect of pin-to-pin coupling can be neglected in all applications by using filter capacitors at Node 3 ...

Page 4

... AD8202 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage Transient Input Voltage (400 ms) Continuous Input Voltage (Common Mode) Reversed Supply Voltage Protection Operating Temperature Range Die SOIC MSOP Storage Temperature Output Short-Circuit Duration Lead Temperature Range (Soldering, 10 sec) ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection ...

Page 5

... AD8202 GND TOP VIEW 6 S (Not to Scale) A2 OUT CONNECT Figure 4. Pin Configuration Y −205.2 −413.0 −413.0 −308.6 +272.4 +IN +417.0 NA +205.2 1048µm –IN Figure 5. Metallization Photograph Rev Page AD8202 1036µ GND A1 OUT A2 ...

Page 6

... AD8202 TYPICAL PERFORMANCE CHARACTERISTICS T = 25° kΩ, unless otherwise noted 100 1k FREQUENCY (Hz) Figure 6. Power Supply Rejection Ratio vs. Frequency Valid for CM Range − + 100 1k 10k FREQUENCY (Hz) Figure 7 ...

Page 7

... V DRIFT (µV/°C) OS Figure 16. Offset Drift Distribution, MSOP, Temperature Range = −40°C to +25° SUPPLY TEMPERATURE RANGE = 25°C TO 125° DRIFT (µV/°C) OS Figure 17. Offset Drift Distribution, MSOP, Temperature Range = 25°C to 125°C AD8202 ...

Page 8

... AD8202 SUPPLY TEMPERATURE RANGE = 9 25°C TO 85° DRIFT (µV/°C) OS Figure 18. Offset Drift Distribution, MSOP, Temperature Range = 25°C to 85° (µV) OS Figure 19. V Distribution, MSOP, Temperature = 25° TEMPERATURE = 125°C ...

Page 9

... GAIN DRIFT (PPM/°C) Figure 27. Gain Drift Distribution, MSOP, Temperature Range = 25°C to 125°C 40 TEMPERATURE = 25° (µV) OS Figure 28. V Distribution, SOIC, Temperature = 25° TEMPERATURE = 125° (µV) OS Figure 29. V Distribution, SOIC, Temperature = 125°C OS AD8202 ...

Page 10

... AD8202 35 TEMPERATURE = –40° (µV) OS Figure 30. V Distribution, SOIC, Temperature = −40° SUPPLY TEMPERATURE RANGE = –40°C TO +25° DRIFT (µV/°C) OS Figure 31. Offset Drift Distribution, SOIC, Temperature Range = −40°C to +25°C ...

Page 11

... Figure 38. Gain Drift Distribution, SOIC, Temperature Range = 25°C to 85° SUPPLY TEMPERATURE RANGE = 40 25°C TO 125° Figure 39. Gain Drift Distribution, SOIC, Temperature Range = 25°C to 125°C Rev Page AD8202 GAIN DRIFT (PPM/°C) GAIN DRIFT (PPM/°C) ...

Page 12

... R F 200 mV below V current increases (see Figure 41 for more information AD8202 Rev Page resistors to reduce CM AD8202 /2, the output attempts to CC due to the gain of 2. However, the output saturates CC . Under these conditions the total input bias CC Data Sheet ). F enables the user ...

Page 13

... A1, directly affects the output voltage of the AD8202 system (Pin 3 and Pin 4 shorted). An example of how to calculate the correct output voltage swing of the AD8202, by taking all variables into account, follows: • Amplifier A1 output saturation potential can drop as low its output. • ...

Page 14

... EXT Rev Page Data Sheet +V S OUT + OUT S V DIFF 10kΩ 10kΩ 2 GAIN = AD8202 V DIFF R 100kΩ EXT 2 –IN GND EXT CONNECT Figure 43. Adjusting for Gains Less than 20 /(R EXT = 200 kΩ. Overall ...

Page 15

... For example PAR expected, the gain of A2 should be increased to 5. Low-pass filters can be implemented in several ways by using the AD8202. In the simplest case, a single-pole filter (20 dB/decade) is formed when the output connected to the input of . ...

Page 16

... ADC expires due to the 20kΩ relatively high open-loop output impedance (typically 21 kΩ the AD8202. Including an R-C network in the output can V OS/IB significantly reduce the effect. The capacitor helps to absorb the NULL transient charge, effectively lowering the high frequency output C impedance of the AD8202 ...

Page 17

... W = Qualified for Automotive Applications. AUTOMOTIVE PRODUCTS The AD8202W models are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. Note that these automotive models may have specifications that differ from the commercial models; therefore, designers should review the Specifications section of this data sheet carefully. Only the automotive grade products shown are available for use in automotive applications ...

Page 18

... AD8202 NOTES Rev Page Data Sheet ...

Page 19

... Data Sheet NOTES Rev Page AD8202 ...

Page 20

... AD8202 NOTES © 2005-2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04981-0-10/11(E) Rev Page Data Sheet ...

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