Part A
AD8022ARMZ
ADI公司
- Lifecycle
- Active
- Stock
- 7448 件
- Package
- MSOP-8
- Series
- 線性放大器-儀器、運算放大器、緩衝放大器
Replacement verdict
Compatible functional replacement candidate
The AD8022ARMZ and AD8021ARM are both high-speed voltage-feedback operational amplifiers from Analog Devices in the same 8-lead MSOP package, sharing a broadly similar signal-chain role. However, they differ in channel count, supply voltage range, and quiescent current, so the AD8021ARM should be treated as a functional candidate rather than a direct drop-in replacement. Designers must validate channel count requirements, supply headroom, and thermal budget before substituting.
Channel Count
Not compatible
Supply Voltage Range
Validation required
Quiescent Current
Validation required
Package Type
High match
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8022ARMZ | AD8021ARM | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 1 (Single) | Channel count determines whether one package can serve two signal paths or only one, directly affecting board layout and part count. |
| -3 dB Bandwidth | 100 MHz | 490 MHz | Bandwidth sets the maximum signal frequency the amplifier can handle with acceptable gain, critical for high-speed signal chains. |
| Slew Rate | 100 V/µs | 470 V/µs | Slew rate limits how fast the output can respond to large signal steps, affecting distortion and settling in fast applications. |
| Input Voltage Noise Density | 2.5 nV/√Hz | 2.1 nV/√Hz | Lower input noise improves signal-to-noise ratio in low-level signal amplification and precision front ends. |
| Supply Voltage Range | ±2.5 V to ±12 V | ±2.5 V to ±12 V | The allowable supply range determines compatibility with the system power rails and output swing headroom. |
| Quiescent Current per Amplifier | 4 mA | 7.8 mA | Quiescent current affects total power dissipation and thermal budget, important in dense or power-sensitive designs. |
| Package | 8-Lead MSOP | 8-Lead MSOP | Package footprint and pinout must match for a drop-in replacement on an existing PCB layout. |
| Output Current | 50 mA | 60 mA | Output drive capability determines the load the amplifier can drive, such as cables or low-impedance stages. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range confirms suitability for industrial and commercial environments and thermal derating needs. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8022ARMZ | AD8021ARM |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 2 | 1 |
| Slew Rate | 50V/µs | 460V/µs |
| -3 dB Bandwidth | 130 MHz | 560 MHz |
| Current - Input Bias | 2.5 µA | 7.5 µA |
| Voltage - Input Offset | 1.5 mV | 400 µV |
| Supply Current | 4mA | 7.8mA |
| Current - Output / Channel | 55 mA | 70 mA |
| Voltage - Supply Span(Min) | 4.5 V | 4.5 V |
| Voltage - Supply Span(Max) | 26 V | 24 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Gain Bandwidth Product | 100 MHz | - |
Frequently asked questions
What are the primary differences between the AD8022ARMZ and the AD8021ARM?
The AD8022ARMZ is a dual, low-noise, high-speed voltage feedback operational amplifier, while the AD8021ARM is a single, low-noise, high-speed voltage feedback operational amplifier. The AD8022ARMZ provides two amplifiers in an 8-lead MSOP package, whereas the AD8021ARM provides one amplifier in an 8-lead MSOP package.
Are the AD8022ARMZ and AD8021ARM pin-compatible?
No. The AD8022ARMZ is a dual op amp with both amplifiers' inputs and outputs assigned across the 8-lead MSOP pins, while the AD8021ARM is a single op amp with a different pin function assignment, including dedicated null and disable pins. They are not drop-in replacements for each other.
Do the AD8022ARMZ and AD8021ARM share the same package type?
Yes. Both devices are offered in an 8-lead MSOP (Mini Small Outline Package) surface-mount package, denoted by the "RM" suffix in their part numbers. However, the internal pin assignments differ because one is a single and the other is a dual amplifier.
How do the bandwidth specifications compare between the AD8022ARMZ and AD8021ARM?
Both the AD8022ARMZ and the AD8021ARM are high-speed voltage feedback amplifiers with similar gain bandwidth product in the range of hundreds of MHz, as specified in their respective Analog Devices datasheets. Designers should consult the exact datasheet for the guaranteed -3 dB bandwidth and gain bandwidth product under their specific supply and load conditions.
Can the AD8021ARM be used to replace one channel of the AD8022ARMZ in an existing design?
Not directly. Although both are low-noise high-speed voltage feedback amplifiers from Analog Devices, the AD8021ARM is a single amplifier with a different pinout and possibly different external compensation requirements. A redesign of the PCB layout and verification against the AD8021ARM datasheet is required before substitution.
What are typical applications for the AD8022ARMZ versus the AD8021ARM?
The AD8022ARMZ, being a dual amplifier, is suited to applications requiring two matched high-speed low-noise channels such as I/Q signal chains, differential drivers, and multi-channel active filters. The AD8021ARM, being a single amplifier, is typically used where one high-speed low-noise gain stage is needed, such as in ADC drivers, transimpedance amplifiers, and single-channel signal conditioning.
Do both the AD8022ARMZ and AD8021ARM operate from the same supply voltage range?
Both devices are designed for operation on dual supplies typically in the ±5 V to ±12 V range, as stated in their Analog Devices datasheets. The exact minimum and maximum supply voltages and the corresponding output swing should be confirmed from the respective datasheet before finalizing a design.