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 AD8574AR are both zero-drift, rail-to-rail operational amplifiers from the same Analog Devices family, sharing identical supply voltage range, offset voltage, and gain bandwidth specifications. The primary distinction is channel count: the AD8572ARZ is a dual-channel device in an 8-lead SOIC package, while the AD8574AR is a quad-channel device in a 14-lead SOIC package. For applications requiring only two channels, the AD8572ARZ is a direct functional substitute; for four-channel requirements, the AD8574AR is the appropriate choice. Pinout and footprint differences must be accounted for during PCB layout.
Channel Count
Not compatible
Package Type
Not compatible
Supply Voltage Range
High match
Input Offset Voltage
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 | AD8572ARZ | AD8574AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 4 (Quad) | Determines how many independent op-amp channels are available in a single package, directly affecting circuit density and channel count. |
| Package / Mounting Type | 8-Lead SOIC (Surface Mount) | 14-Lead SOIC (Surface Mount) | Footprint and pin count must match the PCB layout; a dual and quad device are not drop-in replacements for one another. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the operating supply window; identical ranges allow the same power rail design for either part. |
| Input Offset Voltage (Max) | 1 µV | 1 µV | Ultra-low offset is the defining feature of the AD857x family; matching values preserve DC precision in signal chains. |
| Input Offset Voltage Drift | 0.005 µV/°C | 0.005 µV/°C | Low drift maintains offset stability over temperature, critical for precision instrumentation applications. |
| Gain Bandwidth Product | 1.5 MHz | 1.5 MHz | Sets the achievable closed-loop bandwidth and dynamic response; identical GBW means equivalent AC performance. |
| Supply Current per Amplifier | 0.75 mA typ | 0.75 mA typ | Determines power budget per channel; matching per-amplifier current keeps total power scaling predictable with channel count. |
| Input Bias Current | 50 pA typ | 50 pA typ | Very low bias current minimizes errors in high-impedance sensor and photodiode front-ends; identical values preserve accuracy. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Confirms both parts are rated for industrial/extended temperature environments, ensuring equivalent reliability. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8572ARZ | AD8574AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Zero-Drift | Zero-Drift |
| Number of Circuits | 2 | 4 |
| 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 | 1 nA |
| Voltage - Input Offset | 1 µV | 1 µV |
| Supply Current | 850µA (x2 Channels) | 850µA (x4 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 are the key differences between the AD8572ARZ and AD8574AR?
The AD8572ARZ is a dual (2-channel) zero-drift operational amplifier in an 8-lead SOIC package, while the AD8574AR is a quad (4-channel) zero-drift operational amplifier in a 14-lead SOIC package. Both share the same core amplifier architecture, supply range, and offset voltage specifications, but differ in channel count and package pin count.
Are the AD8572ARZ and AD8574AR electrically identical per channel?
Yes. Both devices are members of the AD857x zero-drift amplifier family and share the same per-channel specifications, including typical offset voltage of 1 µV, offset voltage drift of 0.005 µV/°C, and a gain bandwidth product of 1.5 MHz. The primary difference is the number of integrated amplifiers per package.
What is the supply voltage range for the AD8572ARZ and AD8574AR?
Both devices operate from a single supply of 2.7 V to 5.5 V, or from dual supplies of ±1.35 V to ±2.75 V. This makes them suitable for low-voltage, precision signal-conditioning applications in portable and battery-powered systems.
Can the AD8572ARZ be used as a drop-in replacement for the AD8574AR?
No. The AD8572ARZ is a dual amplifier in an 8-lead SOIC package, while the AD8574AR is a quad amplifier in a 14-lead SOIC package. They are not pin-compatible or package-compatible, so a direct drop-in substitution is not possible without a PCB redesign.
What are the input offset voltage and drift specifications for these amplifiers?
Both the AD8572ARZ and AD8574AR feature a typical input offset voltage of 1 µV and a typical offset voltage drift of 0.005 µV/°C. These zero-drift characteristics make them suitable for precision DC and low-frequency applications where offset stability is critical.
What is the gain bandwidth product and slew rate of the AD8572ARZ and AD8574AR?
Both devices have a gain bandwidth product of 1.5 MHz and a slew rate of 0.4 V/µs. These specifications are identical across the AD857x family and support precision amplification in low-frequency signal chains.
What are the operating temperature ranges for the AD8572ARZ and AD8574AR?
Both the AD8572ARZ and AD8574AR are specified for the industrial temperature range of −40°C to +125°C, making them suitable for industrial, automotive, and instrumentation applications requiring precision over a wide temperature range.
What package types are available for the AD8572ARZ and AD8574AR?
The AD8572ARZ is supplied in an 8-lead SOIC package (the "RZ" suffix indicates RoHS-compliant SOIC). The AD8574AR is supplied in a 14-lead SOIC package. Both are surface-mount packages suitable for automated assembly.