Specifications
| Attribute | Value |
| Package | Bulk,Tube |
| ProductStatus | Obsolete |
| AmplifierType | Instrumentation |
| NumberofCircuits | 1 |
| SlewRate | 2V/µs |
| -3dbBandwidth | 825 kHz |
| Current-InputBias | 500 pA |
| Voltage-InputOffset | 60 µV |
| Current-Supply | 900µA |
| Current-Output/Channel | 18 mA |
| Voltage-SupplySpan(Min) | 4.6 V |
| Voltage-SupplySpan(Max) | 36 V |
| OperatingTemperature | -40°C ~ 85°C |
| MountingType | Surface Mount |
| Package/Case | 8-TSSOP, 8-MSOP (0.118, 3.00mm Width) |
Overview
Description
The AD8221ARM is a precision instrumentation amplifier manufactured by Analog Devices. Known for its high performance, it offers a low noise figure with a gain range adjustable from 1 to 1000, making it suitable for various applications requiring precise signal amplification. The device features a low offset voltage, high common-mode rejection ratio (CMRR), and a wide power supply range, enhancing its versatility and reliability.
Its small MSOP-8 package allows for compact design solutions, while its robust design makes it ideal for use in medical instrumentation, industrial process controls, and other applications requiring accurate data acquisition. The AD8221ARM operates efficiently across a wide temperature range, ensuring consistent performance in diverse environments. Additionally, it simplifies circuit design by providing internal gain-setting resistors and requiring only an external resistor to set the desired gain. Overall, the AD8221ARM is highly valued for its precision, ease of use, and versatility in demanding applications.
Its small MSOP-8 package allows for compact design solutions, while its robust design makes it ideal for use in medical instrumentation, industrial process controls, and other applications requiring accurate data acquisition. The AD8221ARM operates efficiently across a wide temperature range, ensuring consistent performance in diverse environments. Additionally, it simplifies circuit design by providing internal gain-setting resistors and requiring only an external resistor to set the desired gain. Overall, the AD8221ARM is highly valued for its precision, ease of use, and versatility in demanding applications.
Equivalent
The AD8221ARM is an instrumentation amplifier. Equivalent products include the INA128 from Texas Instruments, the MAX4194 from Maxim Integrated, and the LT1167 from Analog Devices. These alternatives offer similar functionalities but might differ in specifications such as bandwidth, gain accuracy, or input noise levels. Always check the datasheets to ensure compatibility with your application requirements.
Features
The AD8221ARM is an instrumentation amplifier designed for precision signal conditioning with key features that include low noise, high accuracy, and excellent stability. It offers a gain range of 1 to 1000, which is easily adjustable via a single resistor. With a low input offset voltage of about 80 µV and a low offset drift, it ensures minimal error in measurements. The device provides a high common-mode rejection ratio (CMRR) of up to 80 dB for maintaining signal integrity in noisy environments.
The AD8221ARM operates over a wide power supply range from ±2.3 V to ±18 V, making it versatile for various applications. It also boasts a high bandwidth of 1.5 MHz at a gain of 1, facilitating fast signal processing. The amplifier is designed with low input bias current, which is critical for working with high-impedance sensors.
Packaged in an MSOP-8, the AD8221ARM is compact and suitable for space-constrained designs. It is widely used in medical instrumentation, industrial process controls, and data acquisition systems due to its robust performance and reliability.
The AD8221ARM operates over a wide power supply range from ±2.3 V to ±18 V, making it versatile for various applications. It also boasts a high bandwidth of 1.5 MHz at a gain of 1, facilitating fast signal processing. The amplifier is designed with low input bias current, which is critical for working with high-impedance sensors.
Packaged in an MSOP-8, the AD8221ARM is compact and suitable for space-constrained designs. It is widely used in medical instrumentation, industrial process controls, and data acquisition systems due to its robust performance and reliability.
Pinout
The AD8221ARM is a precision instrumentation amplifier manufactured by Analog Devices. It comes in an 8-lead MSOP (Mini Small Outline Package) with the following pin functions:
1. RG (Pin 1 and Pin 8): Gain setting pins. A resistor is connected between these pins to set the gain of the amplifier.
2. +IN (Pin 2): Non-inverting input terminal for the signal.
3. -IN (Pin 3): Inverting input terminal for the signal.
4. REF (Pin 4): Reference voltage input. This pin can be used to level-shift the output.
5. -VS (Pin 5): Negative power supply voltage.
6. OUTPUT (Pin 6): Output of the amplifier.
7. +VS (Pin 7): Positive power supply voltage.
The AD8221 is known for its high accuracy, low noise, and wide gain range (easily set with an external resistor). It is commonly used in applications requiring precise signal amplification, such as bridge amplifiers and medical instrumentation.
1. RG (Pin 1 and Pin 8): Gain setting pins. A resistor is connected between these pins to set the gain of the amplifier.
2. +IN (Pin 2): Non-inverting input terminal for the signal.
3. -IN (Pin 3): Inverting input terminal for the signal.
4. REF (Pin 4): Reference voltage input. This pin can be used to level-shift the output.
5. -VS (Pin 5): Negative power supply voltage.
6. OUTPUT (Pin 6): Output of the amplifier.
7. +VS (Pin 7): Positive power supply voltage.
The AD8221 is known for its high accuracy, low noise, and wide gain range (easily set with an external resistor). It is commonly used in applications requiring precise signal amplification, such as bridge amplifiers and medical instrumentation.
Manufacturer
The AD8221ARM is manufactured by Analog Devices, Inc. Analog Devices is a multinational company specializing in the design and manufacturing of analog, mixed-signal, and digital signal processing (DSP) integrated circuits used in electronic equipment. The company provides products and solutions for a wide range of applications, including data conversion, amplification, power management, radio frequency (RF), and more. Analog Devices serves various industries such as automotive, healthcare, industrial automation, consumer electronics, and communications.
Application
The AD8221ARM is an instrumentation amplifier known for its precision and versatility. Its application areas include:
1. Medical Instrumentation: Used in ECGs and other patient monitoring systems for accurate bio-signal acquisition.
2. Industrial Automation: Employed in sensor signal conditioning for precise measurement and control systems.
3. Data Acquisition: Facilitates high-accuracy data logging by amplifying low-level signals.
4. Weigh Scales: Enhances the performance of load cells by providing stable gain.
5. Strain Gauge Monitoring: Used in applications that require precise force, pressure, or displacement measurement.
6. Seismic and Geophysical Instrumentation: Amplifies weak seismic signals for better analysis.
Its low noise, high accuracy, and stability make it suitable for precision applications.
1. Medical Instrumentation: Used in ECGs and other patient monitoring systems for accurate bio-signal acquisition.
2. Industrial Automation: Employed in sensor signal conditioning for precise measurement and control systems.
3. Data Acquisition: Facilitates high-accuracy data logging by amplifying low-level signals.
4. Weigh Scales: Enhances the performance of load cells by providing stable gain.
5. Strain Gauge Monitoring: Used in applications that require precise force, pressure, or displacement measurement.
6. Seismic and Geophysical Instrumentation: Amplifies weak seismic signals for better analysis.
Its low noise, high accuracy, and stability make it suitable for precision applications.
Package
The AD8221ARM is a precision instrumentation amplifier from Analog Devices, housed in an MSOP-8 (Mini Small Outline Package) package.
