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Analog Devices Semiconductor Electronic Components Datasheet

AD8417 Datasheet

Current Sense Amplifier

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Data Sheet
Bidirectional, Zero Drift,
Current Sense Amplifier
AD8417
FEATURES
Typical 0.1 µV/°C offset drift
Maximum ±400 µV voltage offset over full temperature range
2.7 V to 5.5 V power supply operating range
EMI filters included
High common-mode input voltage range
−2 V to +70 V continuous
−3 V to +80 V survival
Initial gain = 60 V/V
Wide operating temperature range
AD8417WB (8-lead MSOP, 8-lead SOIC_N, and 10-lead
MSOP) and AD8417B (8-lead MSOP): −40°C to +125°C
AD8417WH (8-lead SOIC_N and 8-lead MSOP):
−40°C to +150°C
Bidirectional operation
Available in 8-lead SOIC_N, 8-lead MSOP, and FMEA tolerant
10-lead MSOP pinout
CMRR: 86 dB, dc to 10 kHz
AEC-Q100 qualified for automotive applications
APPLICATIONS
High-side current sensing in
Motor controls
Solenoid controls
Power management
Low-side current sensing
Diagnostic protection
GENERAL DESCRIPTION
The AD8417 is a high voltage, high resolution current sense
amplifier. It features an initial 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 AD8417 offers excellent input common-mode rejection
from −2 V to +70 V. The AD8417 performs bidirectional current
measurements across a shunt resistor in a variety of automotive
and industrial applications, including motor control, power
management, and solenoid control.
The AD8417 offers breakthrough performance throughout the
−40°C to +150°C temperature range (AD8417WH). It features
a zero drift core, which leads to a typical offset drift of 0.1 µV/°C
throughout the operating temperature range and the common-
mode voltage range. The AD8417 is qualified for automotive
applications. The device includes electromagnetic interference
(EMI) filters and patented (U.S. Patent 8,624,668 B2) circuitry
to enable output accuracy with pulse-width modulation (PWM)
type input common-mode voltages. The typical input offset voltage
is ±200 µV. The AD8417 is offered in 8-lead MSOP and 8-lead
SOIC_N, along with a 10-lead MSOP pinout option engineered
for failure mode and effects analysis (FMEA).
Table 1. Related Devices
Part No. Description
AD8205 Current sense amplifier, gain = 50
AD8206 Current sense amplifier, gain = 20
AD8207 High accuracy current sense amplifier, gain = 20
AD8210 High speed current sense amplifier, gain = 20
AD8418 High accuracy current sense amplifier, gain = 20
TYPICAL APPLICATION CIRCUIT
VCM = –2V TO +70V
VS = 2.7V TO 5.5V
70V
VCM
0V
50A
ISHUNT
+IN
RSHUNT
–IN
EMI
FILTER
EMI
FILTER
VS
+
G = 60
VREF1
AD8417
OUT
VS
VS/2
VOUT
ISHUNT
–50A
GND
VREF2
0V
Figure 1.
Rev. E
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Tel: 781.329.4700 ©2013–2020 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

AD8417 Datasheet

Current Sense Amplifier

No Preview Available !

AD8417
TABLE OF CONTENTS
Features.............................................................................................. 1
Applications ...................................................................................... 1
General Description ......................................................................... 1
Typical Application Circuit ............................................................ 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings ........................................................... 4
ESD Caution.................................................................................. 4
Pin Configurations and Function Descriptions........................... 5
Typical Performance Characteristics............................................. 6
Theory of Operation ...................................................................... 10
Output Offset Adjustment ............................................................ 11
Unidirectional Operation.......................................................... 11
REVISION HISTORY
3/2020—Rev. D to Rev. E
Added 10-Lead MSOP................................................................ Universal
Changed AD8417WB to AD8417WB and AD8417B, and
Patented to Patented (U.S. Patent 8,624,668 B2) ......Throughout
Changes to Features Section and General Description Section ...... 1
Changed Functional Block Diagram Section to Typical
Application Circuit Section............................................................. 1
Changes to Figure 2 and Table 4 Caption..................................... 5
Added Figure 3; Renumbered Sequentially and Table 5;
Renumbered Sequentially ............................................................... 5
Changes to Figure 11 to Figure 15 ................................................. 7
Changes to Figure 16 to Figure 19 ................................................. 8
Change to Figure 23 ......................................................................... 9
Deleted Figure 26; Renumbered Sequentially ............................ 10
Added Pinout Option Engineered for FMEA Section and
Table 6.............................................................................................. 15
Updated Outline Dimensions....................................................... 17
Changes to Ordering Guide.......................................................... 17
Data Sheet
Bidirectional Operation ............................................................ 11
External Referenced Output ..................................................... 12
Splitting the Supply.................................................................... 12
Splitting an External Reference ................................................ 12
Applications Information ............................................................. 13
Motor Control ............................................................................ 13
Solenoid Control ........................................................................ 14
Pinout Option Engineered for FMEA..................................... 15
Outline Dimensions....................................................................... 16
Ordering Guide .......................................................................... 17
Automotive Products ................................................................ 17
6/2019—Rev. C to Rev. D
Changes to Features Section ............................................................1
Changes to Table 3 ............................................................................4
Changes to Figure 33 ..................................................................... 13
10/2017—Rev. B to Rev. C
Change to Splitting an External Reference Section ................... 12
4/2015—Rev. A to Rev. B
Change to Figure 36 ....................................................................... 14
11/2014—Rev. 0 to Rev. A
Added AD8417WH ...........................................................Universal
Changes to Features Section and General Description Section........1
Changes to Specifications Section and Table 2 .............................3
Changes to Table 3 ............................................................................4
Changes to Ordering Guide.......................................................... 16
11/2013—Revision 0: Initial Version
Rev. E | Page 2 of 17


Part Number AD8417
Description Current Sense Amplifier
Maker Analog Devices
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AD8417 Datasheet PDF






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