Part A
AD8675ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5946 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8675ARZ and AD8671AR-REEL are both precision low-noise operational amplifiers from Analog Devices sharing the same SOIC-8 package and dual-supply architecture, making the AD8675ARZ a viable functional replacement candidate for the AD8671AR-REEL in most precision signal-conditioning applications. Designers should validate bandwidth, noise, and supply-headroom margins against the specific circuit requirements before committing to substitution.
Amplifier Type
High match
Package Type
High match
Gain Bandwidth Product
Validation required
Input Voltage Noise
Validation required
Parts at a glance
Part B
AD8671AR-REEL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 9392 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8675ARZ | AD8671AR-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 1 | Both are single op-amps, so channel count is compatible for direct substitution. |
| Input Offset Voltage (Max) | 75 µV | 125 µV | Lower offset voltage improves DC precision; the AD8675 offers tighter offset for high-accuracy signal chains. |
| Input Voltage Noise Density (1 kHz) | 2.8 nV/√Hz | 3.8 nV/√Hz | Lower noise density benefits low-level signal amplification; the AD8675 provides better noise performance. |
| Gain Bandwidth Product | 10 MHz | 10 MHz | Identical bandwidth means AC response and stability behavior are comparable across both parts. |
| Slew Rate | 2.5 V/µs | 2.5 V/µs | Matching slew rate ensures similar large-signal transient response and settling behavior. |
| Supply Voltage Range | ±5 V to ±15 V | ±5 V to ±15 V | Same supply range allows the parts to be used in identical power rails without redesign. |
| Supply Current per Amplifier (Typ) | 2.8 mA | 3.0 mA | Similar quiescent current keeps power budget nearly unchanged when swapping parts. |
| Input Bias Current (Typ) | 1 nA | 1 nA | Low bias current minimizes errors in high-impedance circuits; both parts perform equivalently here. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings ensure both parts suit the same environmental conditions. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Same package and pinout enable drop-in replacement on existing PCB footprints. |
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 | AD8675ARZ | AD8671AR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 1 | 1 |
| Slew Rate | 2.5V/µs | 4V/µs |
| Gain Bandwidth Product | 10 MHz | 10 MHz |
| Current - Input Bias | 500 pA | 3 nA |
| Voltage - Input Offset | 10 µV | 20 µV |
| Supply Current | 2.5mA | 3mA |
| Current - Output / Channel | 35 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 |
| Output Type | Rail-to-Rail | - |
Frequently asked questions
What are the key differences between the AD8675ARZ and AD8671AR-REEL?
The AD8675ARZ is a single precision operational amplifier supplied in an 8-lead SOIC package (ARZ suffix), while the AD8671AR-REEL is a single precision op amp in an 8-lead SOIC package supplied on tape and reel for automated assembly. Both are single-channel devices from the same precision op amp family, but the AD8675 offers lower voltage noise (2.8 nV/√Hz typical) compared to the AD8671 (10 nV/√Hz typical), while the AD8671 provides higher slew rate (12 V/µs typical) than the AD8675 (2.5 V/µs typical).
Are the AD8675ARZ and AD8671AR-REEL pin-compatible?
Yes. Both devices are single operational amplifiers in the standard 8-lead SOIC package with the same pinout (1 = NULL, 2 = −IN, 3 = +IN, 4 = V−, 5 = NULL, 6 = OUT, 7 = V+, 8 = NC). This allows them to share the same PCB footprint, though electrical performance differences must be evaluated for the target application.
How do the voltage noise specifications compare between the AD8675ARZ and AD8671AR-REEL?
The AD8675ARZ specifies a typical input voltage noise density of 2.8 nV/√Hz at 1 kHz, making it suitable for low-noise signal conditioning. The AD8671AR-REEL specifies a typical input voltage noise density of 10 nV/√Hz at 1 kHz. Designs requiring the lowest possible noise floor should favor the AD8675.
What are the slew rate and bandwidth differences between these two op amps?
The AD8671AR-REEL offers a typical slew rate of 12 V/µs and a gain bandwidth product of 10 MHz. The AD8675ARZ offers a typical slew rate of 2.5 V/µs and a gain bandwidth product of 10 MHz. The AD8671 is therefore better suited for higher-speed signal paths, while the AD8675 prioritizes lower noise.
What supply voltage range do the AD8675ARZ and AD8671AR-REEL support?
Both devices operate from a dual supply of ±5 V to ±15 V (or equivalently a single supply of 10 V to 30 V). They are specified for operation over the extended industrial temperature range of −40 °C to +125 °C.
What does the "REEL" suffix on the AD8671AR-REEL indicate?
The "REEL" suffix indicates that the AD8671AR devices are supplied on tape and reel packaging, which is intended for high-volume automated pick-and-place assembly. The AD8675ARZ is supplied in standard tube or tray packaging unless a reel-specific ordering code is selected. Both use the same 8-lead SOIC body.
Can the AD8675ARZ be used as a drop-in replacement for the AD8671AR-REEL?
Because both are pin-compatible 8-lead SOIC single op amps, the AD8675ARZ can physically replace the AD8671AR-REEL on the same footprint. However, the designer must verify that the lower slew rate (2.5 V/µs vs. 12 V/µs) and different noise profile of the AD8675 do not degrade circuit performance. Substitution should only be made after validation against the manufacturer datasheets.