Part A
AD8571ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2035 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8571ARZ and AD8571AR are functionally equivalent zero-drift operational amplifiers from the same manufacturer family, sharing identical core electrical specifications. The AD8571ARZ is the RoHS-compliant, lead-free package variant, while the AD8571AR is the standard tin-lead package version. Both parts are drop-in compatible in terms of function and performance, with the primary distinction being environmental compliance and package finish. Designers should confirm solder process compatibility and regulatory requirements before substituting one for the other.
Amplifier Function and Topology
High match
Package Type and Pinout
High match
Electrical Specifications
High match
RoHS Compliance and Package Finish
Validation required
Parts at a glance
Part B
AD8571AR
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 8060 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8571ARZ | AD8571AR | Why it matters |
|---|---|---|---|
| Amplifier Type | Zero-Drift, Chopper-Stabilized Operational Amplifier | Zero-Drift, Chopper-Stabilized Operational Amplifier | Confirms both parts share the same core amplifier topology, so functional behavior is equivalent. |
| Number of Channels | 1 | 1 | Single-channel configuration must match for direct board-level substitution. |
| Supply Voltage Range | 2.7 V to 5.5 V (single supply) | 2.7 V to 5.5 V (single supply) | Determines compatibility with the system power rail; identical range ensures the same operating envelope. |
| Input Offset Voltage (max) | 1 µV | 1 µV | Ultra-low offset is the key precision attribute of this zero-drift amplifier; matching values preserve accuracy. |
| Input Offset Voltage Drift | 0.005 µV/°C | 0.005 µV/°C | Drift performance governs stability over temperature; identical drift ensures equivalent precision behavior. |
| Gain Bandwidth Product | 1.5 MHz | 1.5 MHz | Sets the achievable closed-loop bandwidth; matching GBW preserves dynamic response in the application. |
| Input Bias Current | 50 pA (typ) | 50 pA (typ) | Low bias current is critical for high-impedance sensor interfaces; identical values maintain input loading characteristics. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Ensures both parts meet the same environmental requirements for industrial and automotive use. |
| Package / Mounting | 8-Lead SOIC (RoHS-compliant, Z-grade) | 8-Lead SOIC (standard) | The "Z" suffix denotes RoHS compliance and lead-free construction; both are SOIC-8, so footprint is identical but compliance status differs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8571ARZ | AD8571AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Zero-Drift | Chopper (Zero-Drift) |
| Number of Circuits | 1 | 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 | 10 pA | 10 pA |
| Voltage - Input Offset | 1 µV | 1 µV |
| Supply Current | 850µA | 850µA |
| Current - Output / Channel | 30 mA | 30 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 5.5 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 difference between the AD8571ARZ and the AD8571AR?
The AD8571ARZ and AD8571AR are both zero-drift, single-channel operational amplifiers from Analog Devices in an 8-lead SOIC package. The primary difference is the suffix: the "Z" designation in AD8571ARZ indicates RoHS-compliant, lead-free (Pb-free) construction, while the AD8571AR is the non-RoHS, lead-containing (Pb) version. Both share the same electrical specifications and functional performance.
Are the AD8571ARZ and AD8571AR electrically and functionally identical?
Yes. Both parts are the same AD8571 zero-drift op amp core with identical datasheet parameters, including typical offset voltage of 1 µV, offset drift of 0.005 µV/°C, gain bandwidth of 1.5 MHz, and supply voltage range of 2.7 V to 5.5 V. The only documented difference is the RoHS/lead-free status of the package finish.
Can the AD8571ARZ be used as a direct drop-in replacement for the AD8571AR?
Yes, from an electrical and footprint standpoint the AD8571ARZ is a drop-in replacement for the AD8571AR. Both use the same 8-lead SOIC (R-8) package with identical pinout and land pattern. The substitution is appropriate when RoHS compliance is required or preferred; verify the target assembly's soldering process is compatible with the lead-free finish.
What does the "Z" suffix mean in AD8571ARZ?
In Analog Devices part numbering, the "Z" suffix denotes a RoHS-compliant, lead-free package. The AD8571ARZ therefore uses a Pb-free lead finish and is compliant with RoHS directives, whereas the AD8571AR without the Z suffix is the standard leaded (Pb) version.
What are the key specifications shared by the AD8571ARZ and AD8571AR?
Both devices are zero-drift, rail-to-rail input/output operational amplifiers featuring typical offset voltage of 1 µV, offset drift of 0.005 µV/°C, low input bias current (typically 10 pA), gain bandwidth product of 1.5 MHz, and operation from a single supply of 2.7 V to 5.5 V (or dual supplies). They are specified for the extended industrial temperature range of −40 °C to +125 °C.
Are the AD8571ARZ and AD8571AR available in the same package?
Yes. Both are offered in the 8-lead SOIC package (Analog Devices R-8 suffix). The package outline, pin assignments, and PCB land pattern are identical; only the lead finish and RoHS status differ between the two orderable part numbers.
Which part should be selected for a RoHS-compliant design?
The AD8571ARZ should be selected for RoHS-compliant designs, as its "Z" suffix confirms lead-free, RoHS-compliant construction. The AD8571AR is the non-RoHS version and is generally not suitable for designs requiring RoHS compliance.