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AD8221
PRODUCTIONPrecision Instrumentation Amplifier
- Part Models
- 12
- 1ku List Price
- Starting From $2.86
Part Details
- Available in space-saving MSOP
- Gain set with 1 external resistor (gain range 1 to 1000)
- Wide power supply range: ±2.3 V to ±18 V
- Temperature range for specified performance: −40°C to +85°C
- Operational up to 125°C
- Excellent AC specifications
- 80 dB minimum CMRR to 10 kHz (G = 1)
- 825 kHz, –3 dB bandwidth (G = 1)
- 2 V/µs slew rate
- See data sheet for additional features
- Download AD8221-KGD Data Sheet
- Available As Known Good Die and fully guaranteed to data sheet specifications
- Download AD8221-EP Data Sheet
- Military temperature range (−55°C to +125°C)
- Controlled manufacturing baseline
- One assembly/test site
- One fabrication site
- Enhanced product change notification
- Qualification data available on request
- V62/16619 DSCC Drawing Number
The AD8221 is a gain programmable, high performance instrumentation amplifier that delivers the industry’s highest CMRR over frequency in its class. The CMRR of instrumentation amplifiers on the market today falls off at 200 Hz. In contrast, the AD8221 maintains a minimum CMRR of 80 dB to 10 kHz for all grades at G = 1. High CMRR over frequency allows the AD8221 to reject wideband interference and line harmonics, greatly simplifying filter requirements. Possible applications include precision data acquisition, biomedical analysis, and aerospace instrumentation.
Low voltage offset, low offset drift, low gain drift, high gain accuracy, and high CMRR make this part an excellent choice in applications that demand the best dc performance possible, such as bridge signal conditioning.
Programmable gain affords the user design flexibility. A single resistor sets the gain from 1 to 1000. The AD8221 operates on both single and dual supplies and is well suited for applications where ±10 V input voltages are encountered.
The AD8221 is available in a low cost 8-lead SOIC and 8-lead MSOP, both of which offer the industry’s best performance. The MSOP requires half the board space of the SOIC, making it ideal for multichannel or space-constrained applications.
Performance is specified over the entire industrial temperature range of −40°C to +85°C for all grades. Furthermore, the AD8221 is operational from −40°C to +125°C*.
Applications
- Weigh scales
- Industrial process controls
- Bridge amplifiers
- Precision data acquisition systems
- Medical instrumentation
- Strain gages
- Transducer interfaces
Documentation
Data Sheet 4
User Guide 1
Application Note 5
Technical Articles 6
Technical Book 1
Rarely Asked Question Page 1
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD8221AC-P7 | None Available | ||
| AD8221ARMZ | 8-Lead MSOP | ||
| AD8221ARMZ-R7 | 8-Lead MSOP | ||
| AD8221ARMZ-RL | 8-Lead MSOP | ||
| AD8221ARZ | 8-Lead SOIC | ||
| AD8221ARZ-R7 | 8-Lead SOIC | ||
| AD8221ARZ-RL | 8-Lead SOIC | ||
| AD8221BRZ | 8-Lead SOIC | ||
| AD8221BRZ-R7 | 8-Lead SOIC | ||
| AD8221BRZ-RL | 8-Lead SOIC | ||
| AD8221TRMZ-EP | 8-Lead MSOP | ||
| AD8221TRMZ-EP-R7 | 8-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Mar 22, 2021 - 21_0001 Addition of Amkor Philippines as an Alternate Site for Singulated MSOP and MSOP_EP |
||
| AD8221ARMZ | PRODUCTION | |
| AD8221ARMZ-R7 | PRODUCTION | |
| AD8221ARMZ-RL | PRODUCTION | |
|
Jan 5, 2015 - 14_0246 Qualification of ASE Chungli, as an Alternate Assembly Site for Select MSOP Devices |
||
| AD8221ARMZ | PRODUCTION | |
| AD8221ARMZ-R7 | PRODUCTION | |
| AD8221ARMZ-RL | PRODUCTION | |
|
May 15, 2012 - 10_0006 Halogen Free Material Change for mini SOIC Products |
||
| AD8221ARMZ | PRODUCTION | |
| AD8221ARMZ-R7 | PRODUCTION | |
| AD8221ARMZ-RL | PRODUCTION | |
|
Sep 9, 2009 - 07_0083 Polyimide Change |
||
| AD8221ARMZ | PRODUCTION | |
| AD8221ARMZ-R7 | PRODUCTION | |
| AD8221ARMZ-RL | PRODUCTION | |
| AD8221ARZ | PRODUCTION | |
| AD8221ARZ-R7 | PRODUCTION | |
| AD8221ARZ-RL | PRODUCTION | |
| AD8221BRZ | PRODUCTION | |
| AD8221BRZ-R7 | PRODUCTION | |
| AD8221BRZ-RL | PRODUCTION | |
|
Aug 19, 2009 - 07_0024 Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad |
||
| AD8221ARMZ | PRODUCTION | |
| AD8221ARMZ-R7 | PRODUCTION | |
| AD8221ARMZ-RL | PRODUCTION | |
| AD8221ARZ | PRODUCTION | |
| AD8221ARZ-R7 | PRODUCTION | |
| AD8221ARZ-RL | PRODUCTION | |
|
Mar 25, 2021 - 21_0080 Amkor Philippines as an Alternate Site for SOICN |
||
| AD8221ARZ | PRODUCTION | |
| AD8221ARZ-R7 | PRODUCTION | |
| AD8221ARZ-RL | PRODUCTION | |
| AD8221BRZ | PRODUCTION | |
| AD8221BRZ-R7 | PRODUCTION | |
| AD8221BRZ-RL | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
-
Differential Voltage Measurement -
Low Power Strain Gauge Signal Measurement -
Precision Differential Voltage Measurement
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- AD8221
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.
Open ToolSPICE Model 1
Signal Chain Designer - BETA
Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.
Open ToolLTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
AD62x, AD822x, AD842x Series InAmp Evaluation Board