Part A
AD8671ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7405 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8671ARZ and AD8672AR-REEL share the same core operational amplifier architecture, supply voltage range, and unity-gain stability, making them functionally interchangeable in many precision signal-conditioning designs. The primary distinction is channel count: the AD8671ARZ is a single-channel device while the AD8672AR-REEL is a dual-channel device, so the replacement is valid only where the additional channel is either unused or acceptable within the target footprint and thermal budget. Designers should confirm board layout, channel utilization, and package thermal considerations before substituting one for the other in production.
Channel Count
Not compatible
Supply Voltage Range
High match
Package Type
High match
Input Offset Voltage
High match
Parts at a glance
Part B
AD8672AR-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4217 PCS
- Package
- SOIC-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 | AD8671ARZ | AD8672AR-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 2 | Determines how many independent op-amp channels are available in a single package, directly affecting circuit density and channel count. |
| Input Offset Voltage (max) | 75 µV | 75 µV | Low offset voltage is critical for precision DC signal conditioning and minimizes output error in high-gain configurations. |
| Input Voltage Noise Density | 2.8 nV/√Hz | 2.8 nV/√Hz | Low voltage noise is essential for low-level signal amplification and audio/precision instrumentation applications. |
| Gain Bandwidth Product | 10 MHz | 10 MHz | Sets the achievable closed-loop bandwidth and slew performance for the amplifier in signal-processing circuits. |
| Supply Voltage Range | ±5 V to ±15 V | ±5 V to ±15 V | Defines the operating supply headroom and compatibility with system power rails. |
| Input Bias Current (max) | 12 nA | 12 nA | Low bias current reduces errors in high-impedance sensor and feedback networks. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount, tape and reel) | Package and packaging format affect PCB footprint, assembly method, and suitability for automated production lines. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Confirms the device can operate reliably across industrial and extended temperature environments. |
| Slew Rate | 5 V/µs | 5 V/µs | Slew rate limits large-signal bandwidth and affects transient response in fast-changing signal paths. |
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 | AD8671ARZ | AD8672AR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 1 | 2 |
| Slew Rate | 4V/µs | 4V/µs |
| Gain Bandwidth Product | 10 MHz | 10 MHz |
| Current - Input Bias | 3 nA | 3 nA |
| Voltage - Input Offset | 20 µV | 20 µV |
| Supply Current | 3mA | 3mA (x2 Channels) |
| Current - Output / Channel | 20 mA | 20 mA |
| Voltage - Supply Span(Min) | 10 V | 10 V |
| Voltage - Supply Span(Max) | 36 V | 36 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 AD8671ARZ and AD8672AR-REEL?
The AD8671ARZ is a single precision operational amplifier supplied in an 8-lead SOIC package (RoHS-compliant, tube or tray packaging), while the AD8672AR-REEL is a dual precision operational amplifier in an 8-lead SOIC package supplied on tape and reel for automated assembly. The primary differences are channel count (1 vs 2) and packaging format.
Are the AD8671ARZ and AD8672AR-REEL pin-compatible?
No. The AD8671ARZ is a single op amp with a standard single-amplifier SOIC-8 pinout, whereas the AD8672AR-REEL is a dual op amp with a dual-amplifier SOIC-8 pinout. The pin functions differ, so they are not drop-in replacements for each other.
Do both parts share the same electrical performance specifications?
Yes, both are members of the AD8671/AD8672/AD8674 precision op amp family and share the same core specifications, including low voltage noise of approximately 2.8 nV/√Hz, low input bias current, low offset voltage, and high open-loop gain. The AD8672AR-REEL integrates two matched amplifiers in one package.
What is the difference in packaging between the AD8671ARZ and AD8672AR-REEL?
The AD8671ARZ is supplied in an 8-lead SOIC package in standard tube/tray quantities, while the AD8672AR-REEL is supplied in an 8-lead SOIC package on tape and reel, which is intended for high-volume automated pick-and-place assembly lines.
Can the AD8672AR-REEL replace two AD8671ARZ devices in a design?
Functionally, the AD8672AR-REEL provides two amplifiers in a single package, so it can replace two single AD8671ARZ devices in terms of channel count. However, the PCB layout, pinout, and thermal considerations differ, so the design must be revalidated against the AD8672 datasheet before substitution.
Are both devices RoHS-compliant?
Yes. The AD8671ARZ suffix "Z" denotes a RoHS-compliant lead-free SOIC package, and the AD8672AR-REEL is also supplied in a RoHS-compliant SOIC package per Analog Devices documentation.
Which part is better suited for high-volume manufacturing?
The AD8672AR-REEL is better suited for high-volume automated assembly because it is supplied on tape and reel and integrates two amplifiers per package, reducing component count and placement operations. The AD8671ARZ is typically used where a single amplifier per package is required.