AD8418 Current Sense Amplifier: Pinout, Equivalent and Datasheet

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Published: 17 January 2022 | Last Updated: 17 January 2022

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AD8418WBRMZ

AD8418WBRMZ

Analog Devices Inc.

1 Channels 100 dB Instrumentational OP Amps 5V 2.7V~5.5V AD8418 8 Pins 8-TSSOP, 8-MSOP (0.118, 3.00mm Width)

Purchase Guide

1 Channels 100 dB Instrumentational OP Amps 5V 2.7V~5.5V AD8418 8 Pins 8-TSSOP, 8-MSOP (0.118, 3.00mm Width)

The AD8418 is a high voltage, high resolution current shunt amplifier. The AD8418 is fully qualified for automotive applications and includes EMI filters and patented circuitry to enable output accuracy with pulse-width modulation (PWM) type input common-mode voltages. Furthermore, Huge range of Semiconductors, Capacitors, Resistors and IcS in stock. Welcome RFQ.

This video shows us issues with high side sensing, common mode voltage and CMRR ...

Current Sense Amplifiers (1/2): Why not to use an OpAmp (CMRR etc.)

AD8418 Pinout

The following figure is the diagram of AD8418 pinout.

Pinout.png

Pinout


          Pin No.             Mnemonic                                                        Description
1INNegative Input.
2GNDGround.
3VREF2Reference Input 2.
4NCNo Connect. Do not connect to this pin.
5OUTOutput.
6VSSupply.
7VREF1Reference Input 1.
8INPositive Input.

Pin Function Descriptions


AD8418 CAD Model

The followings are AD8418 Symbol, Footprint, and 3D Model.

PCB Symbol.png

PCB Symbol


PCB Footprint.png

PCB Footprint


3D Model.png

3D Model


AD8418 Overview

The AD8418 is a high voltage, high resolution current shunt amplifier. It features an initial gain of 20 V/V, with a maximum ±0.15% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The AD8418 offers excellent input common-mode rejection from −2 V to +70 V. The AD8418 performs bidirectional current measurements across a shunt resistor in a variety of automotive and industrial applications, including motor control, battery management, and solenoid control. The AD8418 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 0.1 µV/°C throughout the operating temperature range and the common-mode voltage range. The AD8418 is fully qualified for automotive applications and includes EMI filters and patented circuitry to enable output accuracy with pulse-width modulation (PWM) type input common-mode voltages. The typical input offset voltage is ±200 µV. The AD8418 is offered in 8-lead MSOP and SOIC packages.

This article provides you with a basic overview of the AD8418 Current Sense Amplifier, including its pin descriptions, features and specifications, etc., to help you quickly understand what AD8418 is.


AD8418 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

● Electromagnetic interference (EMI) filters Included

● High common-mode input voltage range

   ◆ −2 V to +70 V operating

   ◆ −4 V to +85 V survival

● Initial gain = 20 V/V

● Wide operating temperature range: −40°C to +125°C

● Bidirectional operation

● Available in 8-lead SOIC and 8-lead MSOP

● Common-mode rejection ratio (CMRR): 86 dB, dc to 10 kHz

● Qualified for automotive applications


Specifications

Analog Devices Inc. AD8418WBRMZ technical specifications, attributes, parameters and parts with similar specifications to Analog Devices Inc. AD8418WBRMZ.
  • Type
    Parameter
  • Lifecycle Status

    Lifecycle Status refers to the current stage of an electronic component in its product life cycle, indicating whether it is active, obsolete, or transitioning between these states. An active status means the component is in production and available for purchase. An obsolete status indicates that the component is no longer being manufactured or supported, and manufacturers typically provide a limited time frame for support. Understanding the lifecycle status is crucial for design engineers to ensure continuity and reliability in their projects.

    PRODUCTION (Last Updated: 2 weeks ago)
  • Factory Lead Time
    26 Weeks
  • Contact Plating

    Contact plating (finish) provides corrosion protection for base metals and optimizes the mechanical and electrical properties of the contact interfaces.

    Tin
  • Mount

    In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.

    Surface Mount
  • Mounting Type

    The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.

    Surface Mount
  • Package / Case

    refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.

    8-TSSOP, 8-MSOP (0.118, 3.00mm Width)
  • Number of Pins
    8
  • Weight
    139.989945mg
  • Usage Level
    Automotive grade
  • Operating Temperature

    The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

    -40°C~125°C
  • Packaging

    Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

    Tube
  • Series

    In electronic components, the "Series" refers to a group of products that share similar characteristics, designs, or functionalities, often produced by the same manufacturer. These components within a series typically have common specifications but may vary in terms of voltage, power, or packaging to meet different application needs. The series name helps identify and differentiate between various product lines within a manufacturer's catalog.

    Automotive
  • JESD-609 Code

    The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.

    e3
  • Pbfree Code

    The "Pbfree Code" parameter in electronic components refers to the code or marking used to indicate that the component is lead-free. Lead (Pb) is a toxic substance that has been widely used in electronic components for many years, but due to environmental concerns, there has been a shift towards lead-free alternatives. The Pbfree Code helps manufacturers and users easily identify components that do not contain lead, ensuring compliance with regulations and promoting environmentally friendly practices. It is important to pay attention to the Pbfree Code when selecting electronic components to ensure they meet the necessary requirements for lead-free applications.

    no
  • Part Status

    Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.

    Active
  • Moisture Sensitivity Level (MSL)

    Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures

    1 (Unlimited)
  • Number of Terminations
    8
  • ECCN Code

    An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.

    EAR99
  • Terminal Position

    In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.

    DUAL
  • Terminal Form

    Occurring at or forming the end of a series, succession, or the like; closing; concluding.

    GULL WING
  • Peak Reflow Temperature (Cel)

    Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.

    260
  • Number of Functions
    1
  • Supply Voltage

    Supply voltage refers to the electrical potential difference provided to an electronic component or circuit. It is crucial for the proper operation of devices, as it powers their functions and determines performance characteristics. The supply voltage must be within specified limits to ensure reliability and prevent damage to components. Different electronic devices have specific supply voltage requirements, which can vary widely depending on their design and intended application.

    5V
  • Terminal Pitch

    The center distance from one pole to the next.

    0.65mm
  • Time@Peak Reflow Temperature-Max (s)

    Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.

    30
  • Base Part Number

    The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.

    AD8418
  • Pin Count

    a count of all of the component leads (or pins)

    8
  • Qualification Status

    An indicator of formal certification of qualifications.

    Not Qualified
  • Output Voltage

    Output voltage is a crucial parameter in electronic components that refers to the voltage level produced by the component as a result of its operation. It represents the electrical potential difference between the output terminal of the component and a reference point, typically ground. The output voltage is a key factor in determining the performance and functionality of the component, as it dictates the level of voltage that will be delivered to the connected circuit or load. It is often specified in datasheets and technical specifications to ensure compatibility and proper functioning within a given system.

    5V
  • Operating Supply Voltage

    The voltage level by which an electrical system is designated and to which certain operating characteristics of the system are related.

    5V
  • Power Supplies

    an electronic circuit that converts the voltage of an alternating current (AC) into a direct current (DC) voltage.?

    5V
  • Number of Channels
    1
  • Operating Supply Current

    Operating Supply Current, also known as supply current or quiescent current, is a crucial parameter in electronic components that indicates the amount of current required for the device to operate under normal conditions. It represents the current drawn by the component from the power supply while it is functioning. This parameter is important for determining the power consumption of the component and is typically specified in datasheets to help designers calculate the overall power requirements of their circuits. Understanding the operating supply current is essential for ensuring proper functionality and efficiency of electronic systems.

    2.6mA
  • Nominal Supply Current

    Nominal current is the same as the rated current. It is the current drawn by the motor while delivering rated mechanical output at its shaft.

    2.6mA
  • Max Supply Current

    Max Supply Current refers to the maximum amount of electrical current that a component can draw from its power supply under normal operating conditions. It is a critical parameter that ensures the component operates reliably without exceeding its thermal limits or damaging internal circuitry. Exceeding this current can lead to overheating, performance degradation, or failure of the component. Understanding this parameter is essential for designing circuits that provide adequate power while avoiding overload situations.

    130μA
  • Slew Rate

    the maximum rate of output voltage change per unit time.

    1V/μs
  • Amplifier Type

    Amplifier Type refers to the classification or categorization of amplifiers based on their design, functionality, and characteristics. Amplifiers are electronic devices that increase the amplitude of a signal, such as voltage or current. The type of amplifier determines its specific application, performance capabilities, and operating characteristics. Common types of amplifiers include operational amplifiers (op-amps), power amplifiers, audio amplifiers, and radio frequency (RF) amplifiers. Understanding the amplifier type is crucial for selecting the right component for a particular circuit or system design.

    Current Sense
  • Common Mode Rejection Ratio

    Common Mode Rejection Ratio (CMRR) is a measure of the ability of a differential amplifier to reject input signals that are common to both input terminals. It is defined as the ratio of the differential gain to the common mode gain. A high CMRR indicates that the amplifier can effectively eliminate noise and interference that affects both inputs simultaneously, enhancing the fidelity of the amplified signal. CMRR is typically expressed in decibels (dB), with higher values representing better performance in rejecting common mode signals.

    100 dB
  • Voltage - Supply, Single/Dual (±)

    The parameter "Voltage - Supply, Single/Dual (±)" in electronic components refers to the power supply voltage required for the proper operation of the component. This parameter indicates whether the component requires a single power supply voltage (e.g., 5V) or a dual power supply voltage (e.g., ±15V). For components that require a single power supply voltage, only one voltage level is needed for operation. On the other hand, components that require a dual power supply voltage need both positive and negative voltage levels to function correctly.Understanding the voltage supply requirements of electronic components is crucial for designing and integrating them into circuits to ensure proper functionality and prevent damage due to incorrect voltage levels.

    2.7V~5.5V
  • Input Offset Voltage (Vos)

    Input Offset Voltage (Vos) is a key parameter in electronic components, particularly in operational amplifiers. It refers to the voltage difference that must be applied between the two input terminals of the amplifier to nullify the output voltage when the input terminals are shorted together. In simpler terms, it represents the voltage required to bring the output of the amplifier to zero when there is no input signal present. Vos is an important parameter as it can introduce errors in the output signal of the amplifier, especially in precision applications where accuracy is crucial. Minimizing Vos is essential to ensure the amplifier operates with high precision and accuracy.

    200μV
  • Bandwidth

    In electronic components, "Bandwidth" refers to the range of frequencies over which the component can effectively operate or pass signals without significant loss or distortion. It is a crucial parameter for devices like amplifiers, filters, and communication systems. The bandwidth is typically defined as the difference between the upper and lower frequencies at which the component's performance meets specified criteria, such as a certain level of signal attenuation or distortion. A wider bandwidth indicates that the component can handle a broader range of frequencies, making it more versatile for various applications. Understanding the bandwidth of electronic components is essential for designing and optimizing circuits to ensure proper signal transmission and reception within the desired frequency range.

    250 kHz
  • Gain Bandwidth Product

    The gain–bandwidth product (designated as GBWP, GBW, GBP, or GB) for an amplifier is the product of the amplifier's bandwidth and the gain at which the bandwidth is measured.

    250 kHz
  • Power Supply Rejection Ratio (PSRR)

    Power Supply Rejection Ratio (PSRR) is a measure of how well an electronic component, such as an operational amplifier or voltage regulator, can reject changes in its supply voltage. It indicates the ability of the component to maintain a stable output voltage despite fluctuations in the input supply voltage. A higher PSRR value signifies better performance in rejecting noise and variations from the power supply, leading to improved signal integrity and more reliable operation in electronic circuits. PSRR is typically expressed in decibels (dB).

    80dB
  • Supply Voltage Limit-Max

    The parameter "Supply Voltage Limit-Max" in electronic components refers to the maximum voltage that the component can safely handle without getting damaged. This specification is crucial for ensuring the reliable operation and longevity of the component within a given electrical system. Exceeding the maximum supply voltage limit can lead to overheating, electrical breakdown, or permanent damage to the component. It is important to carefully adhere to this limit when designing and operating electronic circuits to prevent potential failures and ensure the overall system's performance and safety.

    6V
  • Input Capacitance

    The capacitance between the input terminals of an op amp with either input grounded. It is expressed in units of farads.

    2pF
  • Input Bias Current

    Input Bias Current refers to the small amount of current that flows into the input terminals of an electronic component, such as an operational amplifier. It is primarily caused by the input impedance of the device and the characteristics of the transistors within it. This current is crucial in determining the accuracy of the analog signal processing, as it can affect the level of voltage offset and signal integrity in the application. In many precise applications, minimizing input bias current is essential to achieve optimal performance.

    130μA
  • Height
    950μm
  • Length
    3.2mm
  • Width
    3.2mm
  • REACH SVHC

    The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.

    No SVHC
  • RoHS Status

    RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.

    ROHS3 Compliant
  • Lead Free

    Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.

    Contains Lead
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AD8418 Functional Block Diagram

The following is the Block Diagram of AD8418.

Functional Block Diagram.png

Functional Block Diagram


AD8418 Equivalent

               Model number            Manufacturer                                        Description
AD8418BRMZAnalog Devices IncBidirectional, Zero-Drift, Current Sense Amplifier
AD8418WBRMZ-RLAnalog Devices IncBidirectional, Zero-Drift, Current Sense Amplifier
AD8418WBRZ-RLAnalog Devices IncBidirectional, Zero-Drift, Current Sense Amplifier
AD8418WBRZAnalog Devices IncBidirectional, Zero-Drift, Current Sense Amplifier


Parts with Similar Specs

The three parts on the right have similar specifications to Analog Devices Inc. & AD8418WBRMZ.

AD8418 Applications

● High-side current sensing in:

   ◆ Motor controls

   ◆ Solenoid controls

   ◆ Power management

● Low-side current sensing

● Diagnostic protection


AD8418 Package

The following diagram shows the AD8418 package.

8-Lead Mini Small Outline Package.png

8-Lead Mini Small Outline Package


AD8418 Manufacturer

Analog Devices (NASDAQ: ADI) is a world leader in the design, manufacture, and marketing of a broad portfolio of high performance analog, mixed-signal, and digital signal processing (DSP) integrated circuits (ICs) used in virtually all types of electronic equipment. Since our inception in 1965, we have focused on solving the engineering challenges associated with signal processing in electronic equipment. Used by over 100,000 customers worldwide, our signal processing products play a fundamental role in converting, conditioning, and processing real-world phenomena such as temperature, pressure, sound, light, speed, and motion into electrical signals to be used in a wide array of electronic devices.


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Datasheet PDF

Download datasheets and manufacturer documentation for Analog Devices Inc. AD8418WBRMZ.
Frequently Asked Questions

What is the essential property of the AD8418?

The AD8418 is a single-supply, zero drift, difference amplifier that uses a unique architecture to accurately amplify small differential current shunt voltages in the presence of rapidly changing common-mode voltages.

What is unique about the design of the AD8418?

The AD8418 is designed to provide excellent common-mode rejection, even with PWM common-mode inputs that can change at very fast rates, for example, 1 V/ns. The AD8418 contains patented technology to eliminate the negative effects of such fast changing external common-mode variations.

How is the input offset drift of the AD8418 implemented?

The AD8418 features an input offset drift of less than 500 nV/°C. This performance is achieved through a novel zero drift architecture that does not compromise bandwidth, which is typically rated at 250 kHz.

Does the AD8418 have breakthrough performance?

The AD8418 offers breakthrough performance without compromising any of the robust application needs typical of solenoid or motor control.
AD8418WBRMZ

Analog Devices Inc.

In Stock: 100

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