Part A
AD8675ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5946 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD8675ARZ is a viable functional replacement candidate for the AD8671ARZ in most precision analog signal-chain applications, as both devices share the same SOIC-8 footprint, dual op-amp topology, and comparable supply and temperature ranges. Designers should validate noise, bandwidth, and offset performance against the specific circuit requirements before final qualification.
Package Type
High match
Channel Count
High match
Supply Voltage Range
Validation required
Input Offset Voltage
Validation required
Parts at a glance
Part B
AD8671ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7405 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
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 | AD8675ARZ | Why it matters |
|---|---|---|---|
| Input Voltage Noise Density (nV/√Hz) | 2.8 | 2.8 | Low voltage noise is critical for precision signal conditioning; both parts are essentially equivalent here, supporting substitutability in low-noise front ends. |
| Input Offset Voltage (max, µV) | 75 | 75 | Offset voltage directly affects DC accuracy; matching maximum limits means either part meets the same precision budget without recalibration. |
| Gain Bandwidth Product (MHz) | 10 | 10 | GBW sets the achievable closed-loop bandwidth; identical values ensure the same AC response and stability behavior in feedback circuits. |
| Slew Rate (V/µs) | 5 | 5 | Slew rate limits large-signal transient response; equal slew rates mean comparable behavior for fast, large-amplitude signals. |
| Supply Voltage Range (V) | ±5 to ±15 | ±5 to ±15 | Compatible supply ranges allow the parts to drop into the same rail voltages without redesigning the power section. |
| Supply Current per Amplifier (typ, mA) | 3.0 | 3.0 | Quiescent current affects power budget and thermal design; identical draw means no change in power consumption when substituting. |
| Input Bias Current (max, nA) | 10 | 10 | Bias current influences offset errors in high-impedance sources; matching limits preserve accuracy in sensor and filter interfaces. |
| Common-Mode Rejection Ratio (min, dB) | 120 | 120 | High CMRR rejects common-mode noise and drift; equal specifications ensure the same rejection performance in differential stages. |
| Operating Temperature Range (°C) | -40 to +125 | -40 to +125 | Identical temperature ratings confirm both parts are suitable for the same industrial and automotive environments. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Same package and pinout enable direct board-level replacement without layout changes. |
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 | AD8671ARZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 1 | 1 |
| Output Type | Rail-to-Rail | - |
| 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 |
Frequently asked questions
What are the primary differences between the AD8671ARZ and AD8675ARZ operational amplifiers?
The AD8671ARZ is a single, precision, low-noise operational amplifier, while the AD8675ARZ is a single, precision, low-noise, rail-to-rail output operational amplifier. The key distinction is that the AD8675ARZ features a rail-to-rail output stage, allowing its output voltage swing to extend close to both supply rails, whereas the AD8671ARZ has a more limited output swing. Both are offered in an 8-lead SOIC package and share similar low offset voltage, low input bias current, and low noise characteristics.
Are the AD8671ARZ and AD8675ARZ pin-compatible in the SOIC-8 package?
Yes. Both the AD8671ARZ and AD8675ARZ are specified in the standard 8-lead SOIC (R-8) package with the same pinout: pin 1 and pin 8 are null/offset trim, pin 2 is -IN, pin 3 is +IN, pin 4 is V-, pin 5 is NULL, pin 6 is OUT, and pin 7 is V+. Because the pin assignments and package dimensions match, they are pin-compatible in this package, though electrical differences must still be validated for the target design.
Can the AD8675ARZ be used as a drop-in replacement for the AD8671ARZ?
Not unconditionally. Although both are single op amps in the same 8-lead SOIC package with identical pinouts, the AD8675ARZ provides a rail-to-rail output stage while the AD8671ARZ does not. A direct substitution is only appropriate after verifying that the rail-to-rail output behavior, supply voltage range, and other datasheet parameters meet the requirements of the existing circuit. The designer should confirm stability, load driving, and output swing requirements against the AD8675ARZ datasheet before replacing.
How do the input offset voltage specifications of the AD8671ARZ and AD8675ARZ compare?
Both devices are precision amplifiers with low input offset voltage. The AD8671ARZ is specified with a maximum input offset voltage of 75 µV, and the AD8675ARZ is specified with a maximum input offset voltage of 75 µV as well. Both also exhibit low offset voltage drift, making them suitable for precision signal conditioning where DC accuracy is important. Designers should consult the respective manufacturer datasheets for the exact test conditions and grades.
What is the difference in output voltage swing between the AD8671ARZ and AD8675ARZ?
The AD8675ARZ features a rail-to-rail output stage, meaning its output can swing very close to both the positive and negative supply rails, which is advantageous in low-voltage or single-supply designs where maximizing dynamic range is important. The AD8671ARZ does not have a rail-to-rail output stage, so its output swing is more limited relative to the supply rails. The exact swing values depend on load and supply conditions and should be taken from the manufacturer datasheets.
Do the AD8671ARZ and AD8675ARZ share the same supply voltage range?
Both devices are designed to operate from dual supplies and support a wide supply voltage range. The AD8671ARZ operates from ±5 V to ±15 V (10 V to 30 V total), and the AD8675ARZ operates over a comparable dual-supply range. Because the AD8675ARZ has a rail-to-rail output stage, its behavior near the supply rails differs from the AD8671ARZ. Always confirm the exact specified supply range and absolute maximum ratings in the respective datasheets before use.
Are the AD8671ARZ and AD8675ARZ both low-noise amplifiers suitable for audio and instrumentation applications?
Yes. Both the AD8671ARZ and AD8675ARZ are precision, low-noise operational amplifiers with low voltage noise density, making them suitable for audio, instrumentation, and other noise-sensitive signal conditioning applications. The AD8675ARZ adds a rail-to-rail output stage, which can be beneficial in applications requiring maximum output swing. The appropriate choice depends on the specific noise, output swing, and supply requirements of the design.
What package and temperature grade options are available for the AD8671ARZ and AD8675ARZ?
Both the AD8671ARZ and AD8675ARZ are offered in the 8-lead SOIC package (the "RZ" suffix denotes the RoHS-compliant SOIC package). Both are specified for the industrial temperature range of -40 °C to +125 °C. Designers should verify the exact ordering code and temperature grade against the manufacturer's product page or datasheet, as availability of specific grades may vary.