Part A
AD8572ARZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5978 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8572ARZ and AD8572AR are functionally equivalent zero-drift operational amplifiers from the same manufacturer family, sharing identical core electrical specifications. The AD8572ARZ is the RoHS-compliant, lead-free package variant, while the AD8572AR is the legacy leaded (Pb) version. Both are direct functional substitutes in circuit design, with the primary distinction being environmental compliance and package finish rather than electrical performance.
Amplifier Specifications
High match
Package Type
High match
Pin Configuration
High match
Environmental Compliance
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 | AD8572AR | Why it matters |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Same manufacturer ensures consistent design, documentation, and quality processes. |
| Amplifier Type | Zero-Drift, Chopper-Stabilized Operational Amplifier | Zero-Drift, Chopper-Stabilized Operational Amplifier | The core amplifier topology determines offset, drift, and noise behavior critical for precision applications. |
| Number of Channels | 2 | 2 | Channel count must match the circuit design for dual-amplifier signal chains. |
| Supply Voltage Range | 2.7 V to 5.5 V (single supply) | 2.7 V to 5.5 V (single supply) | Operating voltage range must be compatible with the system power rail for proper function. |
| Input Offset Voltage (max) | 1 µV | 1 µV | Ultra-low offset is the defining precision characteristic of zero-drift amplifiers. |
| Input Offset Voltage Drift (max) | 0.005 µV/°C | 0.005 µV/°C | Drift over temperature determines stability of precision measurements in real-world conditions. |
| Gain Bandwidth Product | 1.5 MHz | 1.5 MHz | GBW sets the achievable closed-loop bandwidth and dynamic response of the amplifier. |
| Input Bias Current (typ) | 10 pA | 10 pA | Low bias current minimizes errors in high-impedance sensor and feedback networks. |
| Package / Mounting | 8-Lead SOIC (RoHS-compliant, Z grade) | 8-Lead SOIC (non-RoHS) | The Z suffix denotes RoHS compliance; both share the same SOIC footprint, so they are drop-in compatible on the PCB but differ in environmental compliance. |
| RoHS Compliance | Yes (Pb-free, RoHS compliant) | No (contains lead, non-RoHS) | RoHS status affects regulatory compliance, solder process compatibility, and market eligibility; this is the primary functional difference between the two part numbers. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8572ARZ | AD8572AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Zero-Drift | Zero-Drift |
| Number of Circuits | 2 | 2 |
| 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 | 160 pA |
| Voltage - Input Offset | 1 µV | 1 µV |
| Supply Current | 850µA (x2 Channels) | 850µA (x2 Channels) |
| Current - Output / Channel | 30 mA | 30 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 5 V | 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 AD8572ARZ and the AD8572AR?
The AD8572ARZ and AD8572AR are both dual zero-drift operational amplifiers from Analog Devices. The primary difference is the package and lead finish: the AD8572ARZ is supplied in an 8-lead SOIC package with a RoHS-compliant lead finish (Z suffix), while the AD8572AR is the non-RoHS version of the same 8-lead SOIC device. Electrical performance is otherwise equivalent per the manufacturer datasheet.
Are the AD8572ARZ and AD8572AR electrically interchangeable?
Yes. Both parts share the same datasheet specifications, including supply voltage range, offset voltage, input bias current, gain bandwidth, and pinout. The only documented distinction is the RoHS-compliant lead finish on the AD8572ARZ versus the non-RoHS finish on the AD8572AR.
What is the supply voltage range for the AD8572ARZ and AD8572AR?
Both devices operate from a single supply of 2.7 V to 5 V, or from dual supplies of ±1.35 V to ±2.5 V, as specified in the Analog Devices datasheet.
What are the key zero-drift amplifier specifications of these parts?
Per the Analog Devices datasheet, the AD8572ARZ and AD8572AR feature low offset voltage (typically 1 µV), low offset voltage drift (typically 0.005 µV/°C), low input bias current, and rail-to-rail input and output operation, making them suitable for precision low-frequency signal conditioning.
Do the AD8572ARZ and AD8572AR have the same pinout and package dimensions?
Yes. Both are offered in the same 8-lead SOIC package with identical pin assignments and package dimensions. The Z suffix on the AD8572ARZ denotes the RoHS-compliant lead finish and does not change the mechanical footprint.
Can the AD8572ARZ be used as a drop-in replacement for the AD8572AR?
Yes, from an electrical and mechanical standpoint the AD8572ARZ is a drop-in replacement for the AD8572AR in the same 8-lead SOIC footprint. The substitution should be validated against the target design and any RoHS compliance requirements of the application.
Which part should be selected for a RoHS-compliant design?
The AD8572ARZ should be selected for RoHS-compliant designs, since its Z suffix indicates a RoHS-compliant lead finish. The AD8572AR is the non-RoHS variant and should be avoided where RoHS compliance is mandated.