Part A
AD8574ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7036 PCS
- Package
- SOIC-14
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8574ARZ and AD8572AR 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 the channel count: the AD8574ARZ is a quad device while the AD8572AR is a dual device, so the AD8572AR can serve as a functional substitute only where two of the four amplifier channels are unused and the board layout accommodates the different package footprint.
Channel Count
High match
Supply Voltage Range
High match
Input Offset Voltage
High match
Package Type
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 | AD8574ARZ | AD8572AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 2 (Dual) | Determines how many independent op-amp channels are available in a single package; a quad cannot directly replace a dual in a board designed for two channels without layout changes. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Both parts operate over the same single-supply range, so power-rail compatibility is preserved when substituting. |
| Input Offset Voltage (max) | 5 µV | 5 µV | Ultra-low offset is the defining feature of the AD857x family; matching offset ensures DC accuracy is maintained in precision signal chains. |
| Input Offset Voltage Drift | 0.05 µV/°C | 0.05 µV/°C | Low drift keeps offset stable over temperature, critical for precision instrumentation regardless of channel count. |
| Gain Bandwidth Product | 1.5 MHz | 1.5 MHz | Identical bandwidth means AC performance and stability characteristics are the same for both parts. |
| Supply Current per Amplifier | ~1 mA | ~1 mA | Per-amplifier quiescent current is the same, so power budgeting scales only with the number of channels used. |
| Input Bias Current | ~50 pA | ~50 pA | Very low CMOS input bias current suits high-impedance sensors; matching values preserve input loading behavior. |
| Package | 14-lead SOIC | 8-lead SOIC | Different package footprints and pin counts mean the two parts are not drop-in compatible on the same PCB land pattern. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings ensure both parts meet the same environmental requirements. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8574ARZ | AD8572AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Zero-Drift | Zero-Drift |
| Number of Circuits | 4 | 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 | 1 nA | 160 pA |
| Voltage - Input Offset | 1 µV | 1 µV |
| Supply Current | 850µA (x4 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 are the primary differences between the AD8574ARZ and the AD8572AR?
The AD8574ARZ is a quad-channel zero-drift operational amplifier, while the AD8572AR is a dual-channel zero-drift operational amplifier. Both share the same core amplifier architecture and are specified for operation from 2.7 V to 5 V single supply, but the AD8574ARZ integrates four amplifiers in a 14-lead SOIC package, whereas the AD8572AR integrates two amplifiers in an 8-lead SOIC package.
Are the AD8574ARZ and AD8572AR pin-compatible?
No. The AD8574ARZ is a 14-lead SOIC (R-14) device, and the AD8572AR is an 8-lead SOIC (R-8) device. The package body sizes and pin counts differ, so they are not drop-in replacements for one another on the same PCB footprint.
Do the AD8574ARZ and AD8572AR have the same input offset voltage specification?
Both devices are zero-drift amplifiers from the same AD857x family and share the same offset voltage specification of 1 µV typical and 5 µV maximum at 5 V supply, with a specified offset voltage drift of 0.005 µV/°C typical. The difference between the two parts is channel count and package, not the amplifier core specification.
What is the supply voltage range for the AD8574ARZ and AD8572AR?
Both the AD8574ARZ and AD8572AR are specified for single-supply operation from 2.7 V to 5 V, and they also operate on dual supplies of ±1.35 V to ±2.5 V. The specified operating temperature range for both is −40 °C to +125 °C.
Can the AD8572AR be used where an AD8574ARZ is specified, or vice versa?
Only if the design is reworked for the different package and channel count. The AD8572AR provides two amplifiers in an 8-lead SOIC, while the AD8574ARZ provides four amplifiers in a 14-lead SOIC. A dual cannot replace a quad without accounting for the two additional amplifier channels and the different PCB land pattern, and a quad cannot replace a dual without unused channels being properly terminated.
What are the input bias current and noise characteristics of these amplifiers?
Both the AD8574ARZ and AD8572AR are CMOS zero-drift amplifiers with an input bias current of 10 pA typical and 50 pA maximum at 5 V supply. The voltage noise density is 22 nV/√Hz at 1 kHz, and the 0.1 Hz to 10 Hz peak-to-peak noise is 0.5 µV p-p, consistent across both channel-count variants.
What is the gain bandwidth product and slew rate of the AD8574ARZ and AD8572AR?
Both devices have a gain bandwidth product of 1.5 MHz and a slew rate of 0.4 V/µs. These AC specifications are common to the AD857x family and do not differ between the dual AD8572AR and the quad AD8574ARZ.
Are the AD8574ARZ and AD8572AR qualified for automotive or industrial temperature applications?
Both parts are specified over the −40 °C to +125 °C extended industrial temperature range. The AD8574ARZ and AD8572AR are industrial-grade SOIC devices; automotive qualification (AEC-Q100) is not part of the standard ARZ/AR grade designation and should be confirmed against the specific manufacturer datasheet revision before use in automotive designs.