High Voltage,
Current Shunt Monitor
Data Sheet AD8215
Rev. B Document Feedback
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Tel: 781.329.4700 ©2008–2016 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
FEATURES
±4000 V human body model (HBM) ESD
High common-mode voltage range
−2 V to +65 V operating
−3 V to +68 V survival
Buffered output voltage
Wide operating temperature range
8-Lead SOIC: −40°C to +125°C
Excellent ac and dc performance
6 μV/°C typical offset drift
−8 ppm/°C typical gain drift
120 dB typical CMRR at dc
Qualified for automotive applications
APPLICATIONS
High-side current sensing
Motor controls
Transmission controls
Engine management
Suspension controls
Vehicle dynamic controls
DC to dc converters
FUNCTIONAL BLOCK DIAGRAM
07203-001
IN
+
V+
OUT
G = +20
AD8215
A1
PROPRIETARY
OFFSET
CIRCUITRY
IN–
GND
Figure 1.
GENERAL DESCRIPTION
The AD8215 is a high voltage, precision current shunt monitor.
It features a set gain of 20 V/V, with a maximum ±0.3% 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 AD8215 performs unidirectional current
measurements across a shunt resistor in a variety of industrial
and automotive applications, such as motor controls, solenoid
controls, or battery management.
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 AD8215
has an operating temperature range of −40°C to +125°C and is
offered in a small 8-lead SOIC package.
AD8215* PRODUCT PAGE QUICK LINKS
Last Content Update: 12/19/2017
COMPARABLE PARTS
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DOCUMENTATION
Data Sheet
•AD8215: High Voltage, Current Shunt Monitor Data Sheet
Technical Books
•A Designer's Guide to Instrumentation Amplifiers, 3rd
Edition, 2006
REFERENCE MATERIALS
Technical Articles
•High-performance Adder Uses Instrumentation Amplifiers
DESIGN RESOURCES
•AD8215 Material Declaration
•PCN-PDN Information
•Quality And Reliability
•Symbols and Footprints
DISCUSSIONS
View all AD8215 EngineerZone Discussions.
SAMPLE AND BUY
Visit the product page to see pricing options.
TECHNICAL SUPPORT
Submit a technical question or find your regional support
number.
DOCUMENT FEEDBACK
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This page is dynamically generated by Analog Devices, Inc., and inserted into this data sheet. A dynamic change to the content on this page will not
trigger a change to either the revision number or the content of the product data sheet. This dynamic page may be frequently modified.
AD8215* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
View a parametric search of comparable parts.
DOCUMENTATION
Data Sheet
•AD8215: High Voltage, Current Shunt Monitor Data Sheet
Technical Books
•A Designer's Guide to Instrumentation Amplifiers, 3rd
Edition, 2006
REFERENCE MATERIALS
Technical Articles
•High-performance Adder Uses Instrumentation Amplifiers
DESIGN RESOURCES
•AD8215 Material Declaration
•PCN-PDN Information
•Quality And Reliability
•Symbols and Footprints
DISCUSSIONS
View all AD8215 EngineerZone Discussions.
SAMPLE AND BUY
Visit the product page to see pricing options.
TECHNICAL SUPPORT
Submit a technical question or find your regional support
number.
DOCUMENT FEEDBACK
Submit feedback for this data sheet.
This page is dynamically generated by Analog Devices, Inc., and inserted into this data sheet. A dynamic change to the content on this page will not
trigger a change to either the revision number or the content of the product data sheet. This dynamic page may be frequently modified.
AD8215 Data Sheet
Rev. B | Page 2 of 13
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 4
ESD Caution .................................................................................. 4
Pin Configuration and Function Descriptions ............................. 5
Typical Performance Characteristics ............................................. 6
Theory of Operation ...................................................................... 10
Application Notes ........................................................................... 11
Output Linearity ......................................................................... 11
Applications Information .............................................................. 12
High-Side Current Sensing with a Low-Side Switch ............. 12
High-Side Current Sensing ....................................................... 12
Low-Side Current Sensing ........................................................ 12
Outline Dimensions ....................................................................... 13
Ordering Guide .......................................................................... 13
Automotive Products ................................................................. 13
REVISION HISTORY
12/2016—Rev. A to Rev. B
Changes to Features Section and Applications Section ............... 1
Changes to Figure 30 ...................................................................... 12
10/2011—Rev. 0 to Rev. A
Change to Applications Section ...................................................... 1
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 13
Added Automotive Products Section .......................................... 13
1/2008—Revision 0: Initial Version
Data Sheet AD8215
Rev. B | Page 3 of 13
SPECIFICATIONS
Operating temperature range (TOPR) = −40°C to +125°C, ambient temperature (TA) = 25°C, VS = 5 V, R L = 25 kΩ (RL is the output load
resistor), unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
GAIN
Initial 20 V/V
Accuracy ±0.15 % Output voltage (VO) ≥ 0.1 V dc, TA
Accuracy Over Temperature ±0.3 % TOPR
Drift 0 −8 −15 ppm/°C TOPR
VOLTAGE OFFSET
Offset Voltage, Referred to Input (RTI) ±1 mV TA
Over Temperature (RTI) ±2.5 mV TOPR
Drift −15 +6 +18 µV/°C TOPR
INPUT
Input Impedance
Differential 5 kΩ
Common Mode 5 MΩ Common-mode voltage > 5 V
3.5 kΩ Common-mode voltage < 5 V
Common-Mode Input Voltage Range −2 +65 V Common-mode continuous
Differential Input Voltage Range 250 mV Differential input voltage
Common-Mode Rejection Ratio 100 120 dB TOPR, f = dc to 50 kHz, VCM > 5 V
80 90 dB TOPR, f = dc to 40 kHz, VCM < 5 V
OUTPUT
Output Voltage Range Low 0.03 V TA
0.10 V TOPR
Output Voltage Range High 4.95 V TA
4.90 V TOPR
Output Impedance 2 Ω
DYNAMIC RESPONSE
Small Signal −3 dB Bandwidth 450 kHz TOPR
Slew Rate 4.5 V/µs TA
NOISE
0.1 Hz to 10 Hz, RTI 7 µV p-p
Spectral Density, 1 kHz, RTI 70 nV/√Hz
POWER SUPPLY
Operating Range 4.5 5.5 V
Quiescent Current Over Temperature 1.3 2.2 mA VCM > 5 V1, TOPR
Power Supply Rejection Ratio 75 dB TOPR
TEMPERATURE RANGE
For Specified Performance −40 +125 °C
1 When the common-mode input voltage is less than 5 V, the supply current increases, which can be calculated by IS = −0.275 (VCM) + 2.5.
AD8215 Data Sheet
Rev. B | Page 4 of 13
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter Rating
Supply Voltage 12.5 V
Continuous Input Voltage (Survival) −3 V to +68 V
Continuous Differential Input Voltage 0.5 V
Reverse Supply Voltage −0.3 V
ESD Rating
HBM ±4000 V
Charged Device Model (CDM) ±1000 V
Operating Temperature Range −40°C to +125°C
Storage Temperature Range −65°C to +150°C
Output Short-Circuit Duration Indefinite
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
ESD CAUTION
Data Sheet AD8215
Rev. B | Page 5 of 13
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
07203-002
5
1
2
5
6
8
Figure 2. Metallization Diagram
–IN 1
GND 2
NC 3
NC 4
+IN8
NC7
V+6
OUT
5
NC = NO CONNECT
AD8215
TOP VIEW
(Not to Scal e)
07203-003
Figure 3. Pin Configuration
Table 3. Pin Function Descriptions
Pin No. Mnemonic X Y Description
1 −IN −228 +519 Inverting Input
2 GND −273 −251 Ground
3, 4, 7 NC Not applicable Not applicable No Connect
5 OUT +265 −466 Buffered Output
6 V+ +273 −266 Supply
8 +IN +229 +519 Noninverting Input
AD8215 Data Sheet
Rev. B | Page 6 of 13
TYPICAL PERFORMANCE CHARACTERISTICS
–1.2
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.4
0.2
0.6
0.8
1.0
1.2
–40 –20 0 20 40 60 80 100 120
0
7203-017
TEM PE RAT URE ( ° C)
V
OSI
(mV)
Figure 4. Typical Offset Drift (VOSI) vs. Temperature
07203-024
FREQUENCY ( Hz)
CMRR (d B)
60
70
80
90
100
110
120
130
140
10 100 1k 10k 100k 1M
COMMON-MODE VOLTAGE >5V
COMMON-MODE VOLTAGE <5V
Figure 5. Typical CMRR vs. Frequency
–2500
–2000
–1500
–1000
–500
0
500
1000
1500
2000
2500
–40 –20 0 20 40 60 80 100 120
07203-016
TEM P E RATURE (°C)
GAI N E RRO R (ppm)
Figure 6. Typical Gain Error vs. Temperature
–40
–35
–30
–25
–20
–15
–10
–5
0
5
10
15
20
25
30
35
40
10k 100k 1M 10M
07203-018
FREQUENCY (Hz)
GAIN (dB)
Figure 7. Typical Small Signal Bandwidth (VOUT = 200 mV p-p)
0
1
2
3
4
5
6
7
8
9
10
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95
DIFFERENTIAL INPUT VOLTAGE (mV)
TO TAL OUT PUT ERRO R ( %)
250
07203-022
Figure 8. Total Output Error vs. Differential Input Voltage
–570
–560
–550
–540
–530
–520
–510
–500
–490
–
480
V
IN+
V
IN–
0 25 50 75 100 125 150 175 200 225 250
07203-007
DIFFERENTIAL INPUT VOLTAGE (mV)
INPUT BIAS CURRE NT (µ A)
Figure 9. Input Bias Current vs. Differential Input Voltage, VCM = 0 V
Data Sheet AD8215
Rev. B | Page 7 of 13
40
50
60
70
80
90
100
110
120
0 25 50 75 100 125 150 175 200 225 250
IN+
IN–
0
7203-006
DIFFERENTIAL INPUT VOLTAGE (mV)
INPUT BIAS CURRE NT ( µA)
Figure 10. Input Bias Current vs. Differential Input Voltage, VCM = 5 V
–2.4
–2.0
–1.6
–1.2
–0.8
–0.4
0
0.4
0.8
–4 –2 0 2 4 6 8 65
0
7203-004
INPUT COMMON-MODE VOLTAGE (V)
INPUT BIAS CURRE NT (mA)
Figure 11. Input Bias Current vs. Input Common-Mode Voltage
1.0
1.5
2.0
2.5
3.0
3.5
4.0
–4–20246865
07203-005
INPUT COMMON-MODE VOLTAGE (V)
SUPPLY CURRENT ( mA)
Figure 12. Supply Current vs. Input Common-Mode Voltage
TIME (400ns/DIV)
07203-012
2
1
100mV/DIV INPUT
OUTPUT
1V/DIV
Figure 13. Fall Time
TI ME ( 400ns/ DIV)
07203-015
2
1
100mV/DIV
INPUT
OUTPUT
1V/DIV
Figure 14. Rise Time
TIME (1µs/DIV)
07203-013
2
1
200mV/DIV
INPUT
OUTPUT
2V/DIV
Figure 15. Differential Overload Recovery (Falling)
AD8215 Data Sheet
Rev. B | Page 8 of 13
TIME (1µs/DIV)
07203-014
2
1200mV/DIV
INPUT
OUTPUT
2V/DIV
Figure 16. Differential Overload Recovery (Rising)
TIME (4µs/DIV)
07203-019
2
1
2V/DIV
0.01%/DIV
Figure 17. Settling Time (Falling)
TIME (4µs/DIV)
07203-020
2
1
2V/DIV
0.01%/DIV
Figure 18. Settling Time (Rising)
5
6
7
8
9
10
11
12
–40 –20 0 20 40 60 80 100 120 140
07203-010
TE M P ERATURE (°C)
MAXI M UM OUTP UT SI NK CURRE NT (mA)
Figure 19. Maximum Output Sink Current vs. Temperature
4
5
6
7
8
9
10
–40 –20 0 20 40 60 80 100 120 140
07203-011
TE M P ERATURE (°C)
MAXI M UM OUTP UT SO URCE CURRENT (mA)
Figure 20. Maximum Output Source Current vs. Temperature
1.0
1.4
1.8
2.2
2.6
3.0
3.4
3.8
4.2
4.6
5.0
0123456789
0
7203-008
OUT P UT SO URCE CURRENT (mA)
OUTPUT V OLTAGE RANGE (V )
Figure 21. Output Voltage Range vs. Output Source Current
Data Sheet AD8215
Rev. B | Page 9 of 13
0
0.4
0.8
1.2
1.6
2.0
0 1 2 3 4 5 6 7 8 9 10 11 12
07203-009
OUTPUT S INK CURRENT ( mA)
OUT P UT VO LTAGE RANGE (V)
Figure 22. Output Voltage Range from GND vs. Output Sink Current
07203-021
V
OS
(mV)
COUNT
0–2 0–1 1 2
500
1000
1500
2000
2500
3000
3500
+125°C
+25°C
–40°C
Figure 23. Offset Distribution (VOS)
07203-023
GAI N DRIFT (p pm/ °C)
COUNT
0–2–4–6–8–10–12–14–16 0
300
600
900
1200
1500
1800
2100
2400
Figure 24. Gain Drift Distribution
07203-030
OF FSET DRI F T (µ V /° C)
COUNT
0151050–5–10–15–20 20
200
400
600
800
1000
1200
1400
1600
Figure 25. Offset Drift
AD8215 Data Sheet
Rev. B | Page 10 of 13
THEORY OF OPERATION
In typical applications, the AD8215 amplifies a small differential
input voltage generated by the load current flowing through a
shunt resistor. The AD8215 rejects high common-mode voltages
(up to 65 V) and provides a ground-referenced, buffered output
that interfaces with an analog-to-digital converter (ADC).
Figure 26 shows a simplified schematic of the AD8215.
07203-025
V+
OUT =
(I
SHUNT
× R
SHUNT
) × 20
G = +20
AD8215
A1
R1
R
OUT
I
IN
R
PROPRIETARY
OFFSET
CIRCUITRY
GND
I
SHUNT
R
SHUNT
Figure 26. Simplified Schematic
A load current flowing through the external shunt resistor
produces a voltage at the input terminals of the AD8215. R and
R1 connect the input terminals to A1. The inverting terminal,
which has very high input impedance, is held to
(VCM) − (ISHUNT × RSHUNT)
because negligible current flows through R. A1 forces the
noninverting input to the same potential. Therefore, the current
that flows through R1 is equal to
IIN = (ISHUNT × RSHUNT)/R1
This current (IIN) is converted back to a voltage via ROUT. The
output buffer amplifier has a gain of 20 V/V and offers excellent
accuracy as the internal gain setting resistors are precision trimmed
to within 0.01% matching. The resulting output voltage is equal to
OUT = (ISHUNT × RSHUNT) × 20
Data Sheet AD8215
Rev. B | Page 11 of 13
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 AD8215 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 27 shows the
differential input voltage vs. the corresponding output voltage at
different common modes.
200
00
07203-
026
DIFFERENTIAL INPUT VOLTAGE (mV)
OUT P UT VO LT AGE (mV )
10
180
160
140
120
100
80
60
40
20
123456789
IDEAL V
OUT
(mV)
V
OUT
(mV) @ V
CM
=0V
V
OUT
(mV) @ V
CM
=65V
Figure 27. Gain Linearity due to Differential and Common-Mode Voltage
Regardless of the common mode, the AD8215 provides a
correct output voltage when the differential input 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 AD8215 to work with very small
differential inputs, regardless of the common-mode voltage,
allows more dynamic range, accuracy, and flexibility in any
current sensing application.
AD8215 Data Sheet
Rev. B | Page 12 of 13
APPLICATIONS INFORMATION
HIGH-SIDE CURRENT SENSING WITH A LOW-SIDE
SWITCH
In such load control configurations, the PWM-controlled switch
is ground referenced. An inductive load (solenoid) is tied to a
power supply. A resistive shunt is placed between the switch and
the load (see Figure 28). An advantage of placing the shunt on the
high side is that the entire current, including the recirculation
current, can be measured because the shunt remains in the loop
when the switch is off. In addition, diagnostics can be enhanced
because shorts to ground can be detected with the shunt on the
high side. In this circuit configuration, when the switch is closed,
the common-mode voltage moves down to near the negative
rail. When the switch is opened, the voltage reversal across the
inductive load causes the common-mode voltage to be held one
diode drop above the battery by the clamp diode.
07203-027
INDUCTIVE
LOAD
CLAMP
DIODE
SHUNT
SWITCH
BATTERY
54
5V
8 7 6
2 3
5
14
NC V+IN+
IN–
OUT
NCNCGND
AD8215
Figure 28. Low-Side Switch
HIGH-SIDE CURRENT SENSING
In this configuration, the shunt resistor is referenced to the battery.
High voltage is present at the inputs of the current sense amplifier.
In this mode, the recirculation current is again measured and
shorts to ground can be detected. When the shunt is battery
referenced, the AD8215 produces a linear ground-referenced
analog output. An AD8214 can also provide an overcurrent
detection signal in as little as 100 ns (see Figure 29). This feature
is useful in high current systems where fast shutdown in over-
current conditions is essential.
07203-028
54
5V
INDUCTIVE
LOAD
CLAMP
DIODE
SHUNT
SWITCH
BATTERY
1234
8765
AD8214
GND NC –INOUT
V
REG
+IN V
S
NC
OVERCURRENT
DETE CTION (<100ns)
567
3 2
8
41
NCV+ IN+
IN–
OUT
NC NC GND
AD8215
Figure 29. Battery-Referenced Shunt Resistor
LOW-SIDE CURRENT SENSING
In systems where low-side current sensing is preferred, the
AD8215 provides an integrated solution with great accuracy.
Ground noise is rejected, CMRR is typically higher than 90 dB, and
output linearity is not compromised, regardless of the input
differential voltage.
07203-029
INDUCTIVE
LOAD CLAMP
DIODE
SHUNT
BATTERY
SWITCH
5
4
5V
567
3 2
8
41
NCV+ IN+
IN–
OUT
NC NC GND
AD8215
Figure 30. Ground-Referenced Shunt Resistor
Data Sheet AD8215
Rev. B | Page 13 of 13
OUTLINE DIMENSIONS
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
COMPLIANT TO JEDEC STANDARDS MS-012-AA
012407-A
0.25 (0.0098)
0.17 (0.0067)
1.27 (0.0500)
0.40 (0.0157)
0.50 (0.0196)
0.25 (0.0099) 45°
8°
0°
1.75 (0.0688)
1.35 (0.0532)
SEATING
PLANE
0.25 (0.0098)
0.10 (0.0040)
4
1
85
5.00 (0.1968)
4.80 (0.1890)
4.00 (0.1574)
3.80 (0.1497)
1.27 (0.0500)
BSC
6.20 (0.2441)
5.80 (0.2284)
0.51 (0.0201)
0.31 (0.0122)
COPLANARITY
0.10
Figure 31. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
ORDERING GUIDE
Model1, 2 Temperature Range Package Description Package Option
AD8215YRZ −40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N] R-8
AD8215YRZ-RL −40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N], 13” Tape and Reel R-8
AD8215YRZ-R7 −40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N], 7” Tape and Reel R-8
AD8215WYRZ −40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N] R-8
AD8215WYRZ-R7 −40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N], 7” Tape and Reel R-8
AD8215WYRZ-RL −40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N], 13” Tape and Reel R-8
1 Z = RoHS Compliant Part.
2 W = Qualified for Automotive Applications.
AUTOMOTIVE PRODUCTS
The AD8215WYRZ 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. Contact your local Analog Devices account representative for specific product ordering information and to
obtain the specific Automotive Reliability reports for these models.
©2008–2016 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D07203-0-12/16(B)
