AD8237 Instrumentation Amplifier: Pinout, Features and Datasheet
4mA per Channel 250pA 106 dB Instrumentational OP Amps 1.8V~5.5V AD8237 8 Pins 8-TSSOP, 8-MSOP (0.118, 3.00mm Width)









4mA per Channel 250pA 106 dB Instrumentational OP Amps 1.8V~5.5V AD8237 8 Pins 8-TSSOP, 8-MSOP (0.118, 3.00mm Width)
The AD8237 is a micropower, zero drift, rail-to-rail input and output instrumentation amplifier. The AD8237 is an excellent choice for portable systems. The AD8237 has excellent gain accuracy performance that can be preserved at any gain with two ratio-matched resistors. Furthermore, Huge range of Semiconductors, Capacitors, Resistors and IcS in stock. Welcome RFQ.

AD8237 Micropower, Zero-Drift Instrumentation Amplifier
AD8237 Pinout
The following figure is the diagram of AD8237 pinout.

Pinout
| Pin No. | Mnemonic | Description |
| 1 | BW | For high bandwidth mode, connect this pin to +VS, or for low bandwidth mode, connect this pin to −VS. Do not leave this pin floating. |
| 2 | ﹢IN | Positive Input. |
| 3 | ﹣IN | Negative Input. |
| 4 | ﹣VS | Negative Supply. |
| 5 | ﹢VS | Positive Supply. |
| 6 | REF | Reference Input. |
| 7 | FB | Feedback Input. |
| 8 | VOUT | Output. |
Pin Function Descriptions
AD8237 CAD Model
The followings are AD8237 Symbol, Footprint, and 3D Model.

PCB Symbol

PCB Footprint

3D Model
AD8237 Description
The AD8237 is a micropower, zero drift, rail-to-rail input and output instrumentation amplifier. The relative match of two resistors sets any gain from 1 to 1000. The AD8237 has excellent gain accuracy performance that can be preserved at any gain with two ratio-matched resistors. The AD8237 employs the indirect current feedback architecture to achieve a true rail-to-rail capability. Unlike conventional in-amps, the AD8237 can fully amplify signals with common-mode voltage at or even slightly beyond its supplies. This enables applications with high common-mode voltages to use smaller supplies and save power. The AD8237 is an excellent choice for portable systems. With a minimum supply voltage of 1.8 V, a 115 µA typical supply current, and wide input range, the AD8237 makes full use of a limited power budget, yet offers bandwidth and drift performance suitable for bench-top systems. The AD8237 is available in an 8-lead MSOP package. Performance is specified over the full temperature range of −40°C to +125°C.
This article provides you with a basic overview of the AD8237 Instrumentation Amplifier, including its pin descriptions, features and specifications, etc., to help you quickly understand what AD8237 is.
AD8237 Features
● Gain set with 2 external resistors
◆ Can achieve low gain drift at all gains
● Ideal for battery powered instruments
◆ Supply current: 115 µA
◆ Rail-to-rail input and output
◆ Zero input crossover distortion
● Designed for excellent dc performance
◆ Minimum CMRR: 106 dB
◆ Maximum offset voltage drift: 0.3 µV/°C
◆ Maximum gain error: 0.005% (all gains)
◆ Maximum gain drift: 0.5 ppm/°C (all gains)
◆ Input bias current: 1 nA guaranteed to 125°C
● Bandwidth mode pin (BW) to adjust compensation
● 8 kV HBM ESD rating
● RFI filter on-chip
● Single-supply operation: 1.8 V to 5.5 V
● 8-lead MSOP package
Specifications
- TypeParameter
- 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: 3 weeks ago) - Factory Lead Time16 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 Pins8
- Number of Elements1
- 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.
Cut Tape (CT) - 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 Terminations8
- 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 - Number of Functions1
- 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 - 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.
AD8237 - 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 Type
The "Output Type" parameter in electronic components refers to the type of signal or data that is produced by the component as an output. This parameter specifies the nature of the output signal, such as analog or digital, and can also include details about the voltage levels, current levels, frequency, and other characteristics of the output signal. Understanding the output type of a component is crucial for ensuring compatibility with other components in a circuit or system, as well as for determining how the output signal can be utilized or processed further. In summary, the output type parameter provides essential information about the nature of the signal that is generated by the electronic component as its output.
Rail-to-Rail - Power Supplies
an electronic circuit that converts the voltage of an alternating current (AC) into a direct current (DC) voltage.?
5V - 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.
115μA - 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.
115μA - Slew Rate
the maximum rate of output voltage change per unit time.
0.15V/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.
Instrumentation - 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.
106 dB - Current - Input Bias
The parameter "Current - Input Bias" in electronic components refers to the amount of current required at the input terminal of a device to maintain proper operation. It is a crucial specification as it determines the minimum input current needed for the component to function correctly. Input bias current can affect the performance and accuracy of the device, especially in precision applications where small signal levels are involved. It is typically specified in datasheets for operational amplifiers, transistors, and other semiconductor devices to provide users with important information for circuit design and analysis.
250pA - 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.
1.8V~5.5V - Output Current per Channel
Output Current per Channel is a specification commonly found in electronic components such as amplifiers, audio interfaces, and power supplies. It refers to the maximum amount of electrical current that can be delivered by each individual output channel of the component. This parameter is important because it determines the capacity of the component to drive connected devices or loads. A higher output current per channel means the component can deliver more power to connected devices, while a lower output current may limit the performance or functionality of the component in certain applications. It is crucial to consider the output current per channel when selecting electronic components to ensure they can meet the power requirements of the intended system or setup.
4mA - 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.
75μV - Voltage Gain
Voltage gain is a measure of how much an electronic component or circuit amplifies an input voltage signal to produce an output voltage signal. It is typically expressed as a ratio or in decibels (dB). A higher voltage gain indicates a greater amplification of the input signal. Voltage gain is an important parameter in amplifiers, where it determines the level of amplification provided by the circuit. It is calculated by dividing the output voltage by the input voltage and is a key factor in determining the overall performance and functionality of electronic devices.
60dB - 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 - Voltage - Input Offset
Voltage - Input Offset is a parameter that refers to the difference in voltage between the input terminals of an electronic component, such as an operational amplifier, when the input voltage is zero. It is an important characteristic that can affect the accuracy and performance of the component in various applications. A low input offset voltage is desirable as it indicates that the component will have minimal error in its output when the input signal is near zero. Manufacturers typically provide this specification in the component's datasheet to help users understand the component's behavior and make informed decisions when designing circuits.
25μV - -3db Bandwidth
The "-3dB bandwidth" of an electronic component refers to the frequency range over which the component's output signal power is reduced by 3 decibels (dB) compared to its maximum output power. This parameter is commonly used to describe the frequency response of components such as amplifiers, filters, and other signal processing devices. The -3dB point is significant because it represents the half-power point, where the output signal power is reduced to half of its maximum value. Understanding the -3dB bandwidth is important for designing and analyzing electronic circuits to ensure that signals are accurately processed within the desired frequency range.
0.2MHz - Voltage Gain-Nom
Voltage Gain-Nom is a parameter used to describe the ratio of the output voltage to the input voltage in electronic components such as amplifiers. It represents the amplification factor of the component and indicates how much the input voltage is amplified to produce the output voltage. The "Nom" in the term signifies that this value is the nominal or typical voltage gain under specified operating conditions. A higher voltage gain indicates a greater amplification of the input signal, while a lower voltage gain signifies less amplification. This parameter is crucial in determining the performance and functionality of electronic circuits and devices.
10 - Length3mm
- 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
AD8237 Functional Block Diagram
The following is the Block Diagram of AD8237.

Simplified Schematic
AD8237 Equivalent
| Model number | Manufacturer | Description |
| AD8237ARMZ | Analog Devices Inc | Micropower, Zero Drift, True Rail-to-Rail Instrumentation Amplifier |
| AD8237ARMZ-RL | Analog Devices Inc | Micropower, Zero Drift, True Rail-to-Rail Instrumentation Amplifier |
Parts with Similar Specs
- ImagePart NumberManufacturerPackage / CaseNumber of PinsSlew RateInput Offset Voltage (Vos)Common Mode Rejection RatioSupply VoltageOperating Supply CurrentNumber of TerminationsView Compare
AD8237ARMZ-R7
8-TSSOP, 8-MSOP (0.118, 3.00mm Width)
8
0.15V/μs
75 μV
106 dB
5 V
115 μA
8
8-TSSOP, 8-MSOP (0.118, 3.00mm Width)
8
0.16V/μs
25 μV
100 dB
5 V
50 μA
8
8-TSSOP, 8-MSOP (0.118, 3.00mm Width)
8
6 V/μs
85 μV
89 dB
2.9 V
1.1 mA
8
8-TSSOP, 8-MSOP (0.118, 3.00mm Width)
8
-
85 μV
103 dB
2.9 V
1.1 mA
8
8-TSSOP, 8-MSOP (0.118, 3.00mm Width)
8
2 V/μs
85 μV
112 dB
2.9 V
1.1 mA
8
AD8237 Applications
● Bridge amplification
● Pressure measurement
● Medical instrumentation
● Thermocouple interface
● Portable systems
● Current measurement
AD8237 Package
The following diagram shows the AD8237 package.
![8-Lead Mini Small Outline Package [MSOP].png 8-Lead Mini Small Outline Package [MSOP].png](https://res.utmel.com/Images/UEditor/62427771-4b65-4975-ae78-5c45dae2443a.png)
8-Lead Mini Small Outline Package [MSOP]
AD8237 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.
Trend Analysis
Datasheet PDF
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What is the essential property of the AD8237?
The AD8237 is a micropower, zero drift, rail-to-rail input and output instrumentation amplifier. The relative match of two resistors sets any gain from 1 to 1000. The AD8237 has excellent gain accuracy performance that can be preserved at any gain with two ratio-matched resistors.
How many amplifiers does the AD8237 consist of?
The AD8237 is based on an indirect current feedback topology consisting of three amplifiers: two matched transconductance amplifiers that convert voltage to current, and one transimpedance amplifier, TIA, that converts current to voltage.
How does the AD8237 achieve true rail-to-rail characteristics?
Using the indirect current feedback topology and ALS, the AD8237 achieves a truly rail-to-rail characteristic. This increases power efficiency in many applications by allowing for power supply reduction.
How does the AD8237 remove out-of-band signals without affecting CMRR at the input impedance and frequency?
The AD8237 includes an RFI filter to remove high frequency out-of-band signals without affecting input impedance and CMRR over frequency. Additionally, there is a bandwidth mode pin to adjust the compensation.
What are the advantages of the AD8237 over most instrumentation amplifiers?
Unlike most instrumentation amplifiers, the relative match of the two gain setting resistors determines the gain accuracy of the AD8237 rather than a single external resistor.
What is the difference between the AD8237’s allowed input range and that of a traditional architecture?
The allowable input range of the AD8237 is much simpler than traditional architectures.
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