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Home > Products > Integrated Circuits (ICs) > Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps > AD8221BRZ-R7
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AD8221BRZ-R7

In Stock 20790 pcs Reference Price(In US Dollars)
1+
$7.0209
Manufacturer Part Number:
AD8221BRZ-R7
Manufacturer / Brand
Analog Devices Inc.
Part of Description:
IC INST AMP 1 CIRCUIT 8SOIC
Datasheets:
AD8221BRZ-R7(1).pdfAD8221BRZ-R7(2).pdfAD8221BRZ-R7(3).pdfAD8221BRZ-R7(4).pdfAD8221BRZ-R7(5).pdf
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 20790 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
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Part Number AD8221BRZ-R7
Manufacturer / Brand Analog Devices Inc.
Stock Quantity 20790 pcs Stock
Category Integrated Circuits (ICs) > Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Description IC INST AMP 1 CIRCUIT 8SOIC
Lead Free Status / RoHS Status: ROHS3 Compliant
RFQ AD8221BRZ-R7 Datasheets AD8221BRZ-R7 Details PDF
AD8221BRZ-R7 Details PDF for FR.pdf
AD8221BRZ-R7 Details PDF for KR.pdf
AD8221BRZ-R7 Details PDF for DE.pdf
AD8221BRZ-R7 Details PDF for IT.pdf
AD8221BRZ-R7 Details PDF for ES.pdf
Voltage - Supply Span (Min) 4.6 V
Voltage - Supply Span (Max) 36 V
Voltage - Input Offset 25 µV
Supplier Device Package 8-SOIC
Slew Rate 2V/µs
Series -
Package / Case 8-SOIC (0.154", 3.90mm Width)
Package Tape & Reel (TR)
Output Type -
Operating Temperature -40°C ~ 85°C
Number of Circuits 1
Mounting Type Surface Mount
Current - Supply 900µA
Current - Output / Channel 18 mA
Current - Input Bias 200 pA
Base Product Number AD8221
Amplifier Type Instrumentation
-3db Bandwidth 825 kHz

Packaging & ESD

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AD8221BRZ-R7 Product Details:

The AD8221BRZ-R7 is a high-performance instrumentation amplifier manufactured by Analog Devices, Inc. (ADI), a leading provider of analog and mixed-signal integrated circuits. Designed for a variety of applications, this device excels in precision measurement, data acquisition, and signal conditioning tasks. Packaged in a compact SOP8 enclosure, the AD8221BRZ-R7 addresses the challenge of providing high-accuracy signal amplification in space-constrained environments.

Key features of the AD8221BRZ-R7 include low offset voltage of 25 μV, low input bias current of 1 pA, and a high common-mode rejection ratio (CMRR) of 110 dB, ensuring exceptional signal fidelity and minimizing the impact of common-mode interference. The device operates over a wide supply voltage range of ±2.3 V to ±18 V, making it suitable for a diverse range of applications. With a bandwidth of 800 kHz, the AD8221BRZ-R7 can handle a wide variety of signal types, from low-frequency to high-speed applications.

The AD8221BRZ-R7 is versatile and finds use in a broad range of applications, including precision instrumentation, medical equipment, industrial automation, and data acquisition systems. Its high-performance characteristics make it an ideal choice for applications that require accurate signal processing, such as sensor conditioning, bridge transducer amplification, and high-impedance signal buffering.

Regarding equivalent or alternative models, the AD8221BRZ-R7 has several comparable options within the ADI product portfolio. Some alternative models include the AD8220, AD8221, and AD8222 instrumentation amplifiers, which offer similar performance characteristics and feature sets, allowing users to select the most suitable device for their specific requirements.

AD8221BRZ-R7 Image
AD8221BRZ-R7 (1)

AD8221BRZ-R7 Key Technical Attributes

Manufacturer Part Number: AD8221BRZ-R7

Manufacturer: ADI (Analog Devices, Inc.)

Main Category: Integrated Circuits (ICs)

AD8221BRZ-R7 Packing Size

Type: SOP8

Material: Encapsulation used is 2015

Size: Small Outline Package

Pin Configuration: Dual in-line package layout

Thermal Characteristics: Suitable for varied thermal demands

Electrical Properties: High precision with low noise levels

AD8221BRZ-R7 Application

The AD8221BRZ-R7 is extensively used in applications that require accurate amplification and buffering such as medical instrumentation, sensor signal conditioning, data acquisition systems, and industrial process controls.

AD8221BRZ-R7 Features

The AD8221 is a gain programmable, high-performance instrumentation amplifier that ensures accuracy through a simplified setup. It provides superior linearity under wide input conditions. The device operates effectively across a wide power supply range, featuring rail-to-rail output swing ensuring maximum dynamic range. The low offset voltage and drift, along with the low noise and low input bias currents, cater significantly to enhance performance in high-resolution signal processing.

AD8221BRZ-R7 Quality and Safety Features

The AD8221BRZ-R7 has passed rigorous quality and safety testing ensuring reliability and endurance under extreme conditions. It complies with international regulatory standards ensuring its safety and suitability for global applications.

AD8221BRZ-R7 Compatibility

The AD8221BRZ-R7 is compatible with various microcontrollers and can be effectively used in both single and dual-supply operations, making it highly adaptable for multiple configurations and functionalities in circuit designs.

AD8221BRZ-R7 Datasheet PDF

For the most accurate and comprehensive information regarding the AD8221BRZ-R7, visit our website. We provide the authoritative datasheet PDF, which can be easily downloaded directly from the product page to ensure that you have access to all the necessary specifications and usage guidelines.

Quality Distributor

IC-Components is a premium distributor of Analog Devices products. We guarantee the best market prices and authentic components. For reliable sourcing of AD8221BRZ-R7, we encourage you to get a quote directly from our website where service and quality meet your expectations.

Frequently Asked Questions

What are the key design considerations when replacing an older instrumentation amplifier with the AD8221BRZ-R7 in a high-precision data acquisition system?
When replacing legacy instrumentation amplifiers with the AD8221BRZ-R7, engineers must verify input common-mode voltage range compatibility, especially near supply rails, as the AD8221BRZ-R7 does not support rail-to-rail inputs. Additionally, ensure the existing reference pin (REF) biasing matches the new device’s requirements—the AD8221BRZ-R7 requires a low-impedance REF source to maintain accuracy. Pay attention to gain resistor placement and parasitic capacitance, as improper layout can degrade CMRR at higher gains. The AD8221BRZ-R7 also offers superior noise performance (9 nV/√Hz typ) compared to many older parts, but this advantage is only realized with proper PCB grounding and shielding.
Can the AD8221BRZ-R7 be used in single-supply applications, and what are the limitations for input signal swing?
Yes, the AD8221BRZ-R7 supports single-supply operation (down to +2.3 V), but its input common-mode range is limited to 1.2 V above the negative rail and 1.2 V below the positive rail. This means in a 3.3 V single-supply system, valid input signals must stay within approximately 1.2 V to 2.1 V. Signals outside this window will cause distortion or clipping. For low-level sensor signals near ground, consider adding a small positive bias or using a dual supply to avoid input saturation.
How does the AD8221BRZ-R7 perform in high-impedance sensor interface applications like thermocouples or strain gauges, and what external components are critical?
The AD8221BRZ-R7 is well-suited for high-impedance sensors due to its low input bias current (2 nA max) and high input impedance (>10^9 Ω). However, in such applications, guard rings and proper PCB layout are essential to minimize leakage currents. A low-leakage, low-drift gain resistor (e.g., metal foil type) should be used for external gain setting, as parasitic resistances can introduce offset and gain errors. Additionally, include EMI/RFI filtering capacitors (e.g., 1–10 nF) at the inputs to suppress high-frequency interference without significantly affecting bandwidth.
What are the risks of substituting the AD8221BRZ-R7 with a cheaper instrumentation amplifier like the INA128 or AD620 in an existing design?
Substituting the AD8221BRZ-R7 with the INA128 or AD620 may seem cost-effective, but critical differences exist. The AD8221BRZ-R7 offers better DC precision (lower offset voltage drift: 0.25 µV/°C vs. 1–2 µV/°C for INA128) and lower noise, making it preferable for precision applications. The AD620 has higher quiescent current and worse CMRR at low gains. Additionally, pin compatibility is not guaranteed—REF and gain pin configurations differ, potentially requiring PCB modifications. Always revalidate system-level accuracy, thermal drift, and stability after substitution.
Is the AD8221BRZ-R7 suitable for industrial environments with extended temperature operation, and what derating factors apply?
The AD8221BRZ-R7 is rated for operation from –40°C to +85°C (industrial grade), making it suitable for most industrial environments. However, at elevated temperatures, input offset voltage drift and gain drift increase slightly. Ensure adequate thermal management and avoid operating near the upper temperature limit under high gain or high common-mode stress. Long-term reliability is enhanced by staying within recommended supply voltage (±18 V max) and avoiding input overvoltage beyond absolute maximum ratings, even briefly, to prevent degradation.
How should the gain-setting resistor be selected and laid out when using the AD8221BRZ-R7 in a high-gain (G > 100) configuration?
For high-gain applications with the AD8221BRZ-R7, use a precision, low-temperature-coefficient resistor (e.g., ±25 ppm/°C or better) with tight tolerance (±0.1% or better) to maintain gain accuracy. Keep the resistor physically close to the RG pins to minimize parasitic capacitance and inductance, which can cause peaking or instability. Avoid routing high-impedance traces near noisy digital lines. For gains above 100, consider shielding the RG node and using a guard plane to reduce leakage and noise coupling.
Can the AD8221BRZ-R7 drive capacitive loads directly, and what compensation techniques are recommended?
The AD8221BRZ-R7 is not designed to drive large capacitive loads (>100 pF) directly without risk of oscillation. When interfacing with long cables or capacitive sensors, add a small series resistor (10–100 Ω) between the output and the load to isolate the capacitive reactance. For highly capacitive loads (>1 nF), consider adding a feedback capacitor across the gain resistor or using an external buffer stage. Always verify stability with transient load testing in the actual application circuit.
What are the key differences between the AD8221BRZ-R7 and the newer AD8222 in terms of migration feasibility and performance trade-offs?
The AD8222 is a dual-channel version of the AD8221BRZ-R7 and shares similar performance characteristics, but it is not a direct drop-in replacement due to different pinouts and package sizes. Migrating from the AD8221BRZ-R7 to the AD8222 requires PCB layout changes and verification of channel-to-channel crosstalk in multi-channel systems. The AD8222 offers matched performance between channels, beneficial in differential signal paths, but consumes more quiescent current. If single-channel operation is sufficient, sticking with the AD8221BRZ-R7 may offer better power efficiency and layout simplicity.
How does power supply rejection ratio (PSRR) of the AD8221BRZ-R7 impact performance in noisy industrial power environments?
The AD8221BRZ-R7 features a high PSRR of 100 dB (typical) at DC, which helps reject ripple and noise from unregulated power supplies common in industrial settings. However, PSRR degrades at higher frequencies (>1 kHz), so additional supply filtering (e.g., LC or RC filters) is recommended when using switch-mode power supplies. Place decoupling capacitors (0.1 µF ceramic + 10 µF tantalum) as close as possible to the supply pins to maintain stability and minimize supply-induced errors in high-gain configurations.
What configuration is required for the REF pin when using the AD8221BRZ-R7 in a single-ended output system with a microcontroller ADC?
When interfacing the AD8221BRZ-R7 with a single-ended ADC, the REF pin must be driven to the desired output common-mode voltage—typically mid-supply (e.g., 1.65 V in a 3.3 V system) for maximum dynamic range. Use a low-output-impedance buffer (e.g., op-amp voltage follower) to drive the REF pin, as the internal circuitry sources/sinks current during transients. Avoid connecting REF directly to a resistor divider without buffering, as this can introduce gain errors and limit output swing. Ensure the REF voltage remains stable under all operating conditions.

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AD8221BRZ-R7

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IC INST AMP 1 CIRCUIT 8SOIC

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