Part A
AD8572ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2102 PCS
- Package
- TSSOP-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8571ARM-R2 is a single-channel variant of the AD8572ARUZ dual-channel amplifier, sharing the same zero-drift auto-zero architecture, supply range, and MSOP-8 footprint family. It can serve as a functional substitute where only one amplifier channel is required, but the reduced channel count and differing package outline must be validated against the target design before substitution.
Channel Count
Not compatible
Package Type
Validation required
Supply Voltage Range
High match
Amplifier Architecture
High match
Parts at a glance
Part B
AD8571ARM-R2
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2090 PCS
- Package
- TSSOP-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8572ARUZ | AD8571ARM-R2 | 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. |
| Package / Mounting | 8-Lead TSSOP (Surface Mount) | 8-Lead MSOP (Surface Mount) | Footprint and pinout must match the PCB land pattern; TSSOP and MSOP are not drop-in compatible without a board redesign. |
| Input Offset Voltage (max) | 1 µV | 1 µV | Ultra-low offset is critical for precision DC signal conditioning; identical offset performance preserves accuracy when substituting. |
| Input Offset Voltage Drift (max) | 0.005 µV/°C | 0.005 µV/°C | Low drift maintains precision over temperature; matching drift ensures stable performance across the operating range. |
| Gain Bandwidth Product | 1.5 MHz | 1.5 MHz | Sets the achievable closed-loop bandwidth and AC response; identical GBW means equivalent dynamic performance. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines compatibility with single-supply systems; matching range allows use in the same power rail designs. |
| Supply Current per Amplifier (typ) | 0.75 mA | 0.75 mA | Affects power budget and thermal load; identical per-amplifier current keeps power consumption predictable. |
| Input Bias Current (typ) | 10 pA | 10 pA | Very low bias current minimizes errors in high-impedance sensor interfaces; matching values preserve input accuracy. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Determines suitability for industrial and automotive environments; identical range ensures equivalent environmental robustness. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8572ARUZ | AD8571ARM-R2 |
|---|---|---|
| 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 are the key differences between the AD8572ARUZ and the AD8571ARM-R2?
The AD8572ARUZ is a dual-channel zero-drift operational amplifier supplied in a 8-lead TSSOP (RU-8) package, while the AD8571ARM-R2 is a single-channel zero-drift operational amplifier supplied in an 8-lead MSOP (RM-8) package on tape and reel. Both share the same AD857x zero-drift amplifier core, but differ in channel count, package type, and packaging format.
Are the AD8572ARUZ and AD8571ARM-R2 pin-compatible?
No. The AD8572ARUZ is a dual amplifier in an 8-lead TSSOP, whereas the AD8571ARM-R2 is a single amplifier in an 8-lead MSOP. The pin functions and package footprints differ, so they are not drop-in replacements for one another.
What is the input offset voltage performance of these amplifiers?
Both devices are zero-drift amplifiers with very low input offset voltage, typically in the microvolt range, and extremely low offset voltage drift over temperature. This makes them suitable for precision, low-frequency signal conditioning where offset stability is critical.
What supply voltage range do the AD8572ARUZ and AD8571ARM-R2 support?
Both devices operate from a single supply of approximately 2.7 V to 5 V, and also support dual-supply operation within the corresponding total supply range. This allows use in low-voltage portable and battery-powered systems as well as higher-voltage analog front ends.
Can the AD8571ARM-R2 be used where a dual amplifier like the AD8572ARUZ is specified?
Not directly. The AD8571ARM-R2 provides only one amplifier channel, so a design requiring two independent channels would need two AD8571ARM-R2 devices or a different dual device. Package footprint and board layout must also be revalidated.
What are typical applications for these zero-drift amplifiers?
Typical applications include precision sensor signal conditioning, low-offset instrumentation, thermocouple and bridge transducer interfaces, and low-frequency filtering where low offset voltage and low drift are required. The dual AD8572ARUZ suits multi-channel signal paths, while the single AD8571ARM-R2 suits compact single-channel designs.
How does the packaging format differ between the two parts?
The AD8572ARUZ is supplied in a tube or standard TSSOP packaging depending on the ordering option, while the AD8571ARM-R2 is supplied in an 8-lead MSOP on tape and reel (R2 suffix), which is suited to automated high-volume assembly.