Part A
AD8572ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5978 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The AD8572ARZ and AD8571AR share the same zero-drift amplifier core, supply range, and SOIC-8 footprint, making the dual-channel AD8572ARZ a viable functional substitute for the single-channel AD8571AR in most designs. The primary consideration is the difference in channel count, which affects board layout and unused-channel termination, while gain bandwidth and supply voltage headroom should be validated against the target application.
Amplifier Core Technology
High match
Channel Count
Validation required
Package Type
High match
Gain Bandwidth Product
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8572ARZ | AD8571AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 1 (Single) | Determines how many independent op-amp channels are available in one package; a dual cannot directly replace a single in a one-channel circuit without layout changes. |
| Input Offset Voltage (Max) | 1 µV | 1 µV | Ultra-low offset is the defining feature of the AD857x family; matching offset ensures equivalent DC accuracy in precision signal chains. |
| Input Offset Drift (Max) | 0.005 µV/°C | 0.005 µV/°C | Low drift maintains precision over temperature; identical drift means thermal behavior is interchangeable between the two parts. |
| Gain Bandwidth Product | 1.5 MHz | 1.5 MHz | Sets the closed-loop bandwidth achievable; equal GBW means AC performance and stability margins are comparable. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines compatibility with single-supply systems; identical range allows the same power rail design. |
| Supply Current per Amplifier (Typ) | 0.75 mA | 0.75 mA | Affects power budget; equal per-amplifier current means power consumption scales only with channel count. |
| Input Bias Current (Typ) | 10 pA | 10 pA | Very low bias current suits high-impedance sources; matching values preserve input loading characteristics. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Confirms industrial temperature capability; identical ratings allow use in the same environmental conditions. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Both use the same 8-lead SOIC footprint, but pinout differs between single and dual op-amps, so board layout must be verified before substitution. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8572ARZ | AD8571AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Zero-Drift | Chopper (Zero-Drift) |
| Number of Circuits | 2 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.4V/µs | 0.4V/µs |
| Gain Bandwidth Product | 1.5 MHz | 1.5 MHz |
| Current - Input Bias | 160 pA | 10 pA |
| Voltage - Input Offset | 1 µV | 1 µV |
| Supply Current | 850µA (x2 Channels) | 850µA |
| Current - Output / Channel | 30 mA | 30 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 5 V | 5.5 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the primary difference between the AD8572ARZ and the AD8571AR?
The AD8572ARZ is a dual-channel zero-drift operational amplifier, while the AD8571AR is a single-channel zero-drift operational amplifier. Both are members of the Analog Devices AD857x family and share the same core amplifier architecture, but they differ in channel count and package pinout.
Are the AD8572ARZ and AD8571AR pin-compatible?
No. The AD8572ARZ is supplied in an 8-lead SOIC package (SOIC-8) containing two amplifiers, whereas the AD8571AR is supplied in an 8-lead SOIC package containing a single amplifier with different pin assignments. The pin functions and PCB land patterns differ, so they are not direct drop-in replacements for one another.
Do the AD8572ARZ and AD8571AR share the same electrical specifications?
Yes, the core amplifier specifications are essentially identical because both devices use the same zero-drift amplifier design. Key shared parameters include a typical offset voltage of 1 µV, a typical input offset drift of 0.005 µV/°C, a gain bandwidth product of 1.5 MHz, and a supply voltage range of 2.7 V to 5.5 V. The primary difference is the number of amplifiers per package.
What is the supply voltage range for the AD8572ARZ and AD8571AR?
Both devices operate from a single supply voltage of 2.7 V to 5.5 V, and they also support dual-supply operation within the equivalent total supply range. This makes them suitable for low-voltage, battery-powered, and precision signal-conditioning applications.
What are the typical offset voltage and drift specifications for these amplifiers?
The AD8572ARZ and AD8571AR feature a typical input offset voltage of 1 µV and a typical input offset voltage drift of 0.005 µV/°C. These zero-drift characteristics make them appropriate for precision DC and low-frequency applications where offset stability is critical.
What is the gain bandwidth product of the AD8572ARZ and AD8571AR?
Both the AD8572ARZ and AD8571AR have a gain bandwidth product of 1.5 MHz. This specification is shared across the AD857x family and applies to each amplifier channel independently.
In which package types are the AD8572ARZ and AD8571AR available?
The AD8572ARZ is available in an 8-lead SOIC package (SOIC-8). The AD8571AR is also available in an 8-lead SOIC package. Both are surface-mount devices, but the internal pinout differs due to the single versus dual amplifier configuration.
Can the AD8572ARZ be used to replace two AD8571AR devices in a design?
Functionally, the AD8572ARZ integrates two AD8571AR-equivalent amplifier channels into a single package, which can reduce board space and component count. However, because the pinouts differ, a direct replacement requires PCB layout changes and verification of pin functions against the respective datasheets. It is not a drop-in substitution without design validation.