Overview
Features and Benefits
- Gain set with 1 external resistor
- Gain range: 1 to 1000
- Input voltage goes below ground
- Inputs protected beyond supplies
- Very wide power supply range
- Single supply: 2.2 V to 36 V
- Dual supplies: ±1.35 V to ±18 V
- Bandwidth (G = 1): 1.5 MHz
- CMRR (G = 1): 90 dB minimum for BR models
- Input noise: 22 nV/√Hz
- Typical supply current: 350 μA
- Specified temperature: −40°C to +125°C
- 8-lead SOIC and MSOP packages
Product Details
The AD8226 is a low cost, wide supply range instrumentation amplifier that requires only one external resistor to set any gain between 1 and 1000.
The AD8226 is designed to work with a variety of signal voltages. A wide input range and rail-to-rail output allow the signal to make full use of the supply rails. Because the input range also includes the ability to go below the negative supply, small signals near ground can be amplified without requiring dual supplies. The AD8226 operates on supplies ranging from ±1.35 V to ±18 V for dual supplies and 2.2 V to 36 V for single supply.
The robust AD8226 inputs are designed to connect to real-world sensors. In addition to its wide operating range, the AD8226 can handle voltages beyond the rails. For example, with a ±5 V supply, the part is guaranteed to withstand ±35 V at the input with no damage. Minimum as well as maximum input bias currents are specified to facilitate open wire detection.
The AD8226 is perfect for multichannel, space-constrained industrial applications. Unlike other low cost, low power instrumentation amplifiers, the AD8226 is designed with a minimum gain of 1 and can easily handle ±10 V signals. With its MSOP package and 125°C temperature rating, the AD8226 thrives in tightly packed, zero airflow designs.
The AD8226 is available in 8-lead MSOP and SOIC packages, and is fully specified for −40°C to +125°C operation.
For a device with a similar package and performance as the AD8226 but with gain settable from 5 to 1000, consider using the AD8227.
Applications
Product Categories
Markets and Technologies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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AN-1401: Instrumentation Amplifier Common-Mode Range: The Diamond Plot (Rev. 0)10/14/2016PDF656 K
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UG-261: Evaluation Boards for the AD62x, AD822x and AD842x Series10/17/2019PDF604 kB
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CN0325: PLC/DCS Universal Analog Input Using Either 4 or 6 Pin Terminal Block6/19/2014PDF2260 kB
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CN-0251: A Flexible 4-Channel Analog Front End for Wide Dynamic Range Signal Conditioning12/30/2013PDF253 kB
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CN0295:Flexible, 4 mA-to-20 mA Pressure Sensor Transmitter with Voltage or Current Drive5/28/2013PDF242 kB
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CN-0289: Flexible, 4 mA-to-20 mA, Loop-Powered Pressure Sensor Transmitter with Voltage or Current Drive5/9/2013PDF273 kB
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CN-0253: A Robust, Low Power, Battery Monitoring Circuit Front End6/13/2012PDF128 kB
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CN-0213:Complete High Speed, High CMRR Precision Analog Front End for Process Control6/5/2012PDF288 kB
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Bioimpedance Circuit Design Challenges for Body-Worn Systems12/1/2014 Analog Dialogue
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Simple Ambient Light Sensor Circuit7/1/2011 Analog Dialogue
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Discussion Between CareFusion and Analog Devices: Optimizing Performance and Lowering Power in an EEG Amplifier7/1/2011
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Mitigation Strategies for ECG Design Challenges4/1/2011
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High-performance Adder Uses Instrumentation Amplifiers9/3/2009
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
AD8226
In-Amp Diamond Plot Tool
The Diamond Plot Tool is a web application that generates a configuration-specific Output Voltage Range vs. Input Common-Mode Voltage graph, also known as the Diamond Plot, for Analog Devices Instrumentation Amplifiers. Based on user inputs such as supply voltage, gain, and input signal range, the tool detects saturation and recommends in-amps for which the input signal is in-range and the configuration is valid. Avoid saturation, find the best in-amp for your design, and save time.
SPICE Models
CIR
AD8226 SPICE Macro Model
2.91 K
Reference Designs (6)
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| AD8226ARMZ | Material Declaration | Reliability Data | 8-Lead MSOP | |
| AD8226ARMZ-R7 | Material Declaration | Reliability Data | 8-Lead MSOP | |
| AD8226ARMZ-RL | Material Declaration | Reliability Data | 8-Lead MSOP | |
| AD8226ARZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8226ARZ-R7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8226ARZ-RL | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8226BRMZ | Material Declaration | Reliability Data | 8-Lead MSOP | |
| AD8226BRMZ-R7 | Material Declaration | Reliability Data | 8-Lead MSOP | |
| AD8226BRMZ-RL | Material Declaration | Reliability Data | 8-Lead MSOP | |
| AD8226BRZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8226BRZ-R7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
| Wafer Fabrication Data |
PCN-PDN Information
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Sample & Buy
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.