Part A
AD8676ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4850 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD8676ARZ and AD8672AR are both dual precision operational amplifiers in the same SOIC-8 package with identical pinouts, making the AD8676ARZ a viable functional replacement candidate for the AD8672AR in most designs. The primary distinction is the AD8676ARZ's lower voltage noise and lower input bias current, which can offer performance advantages in high-impedance and low-noise signal chains, while supply range and gain-bandwidth characteristics remain closely aligned. Designers should validate supply voltage headroom and dynamic performance in the target circuit before committing to substitution.
Package Type
High match
Channel Count
High match
Supply Voltage Range
High match
Input Voltage Noise
Validation required
Parts at a glance
Part B
AD8672AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 629 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 | AD8676ARZ | AD8672AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual op-amps, so channel count is compatible for direct substitution in dual-channel designs. |
| Input Offset Voltage (Max) | 12 µV | 75 µV | Lower offset voltage improves DC precision; AD8676 is significantly more precise, which matters for high-accuracy signal chains. |
| Input Voltage Noise Density | 2.8 nV/√Hz | 8 nV/√Hz | Lower noise density benefits low-level signal amplification; AD8676 offers substantially better noise performance. |
| Gain Bandwidth Product | 10 MHz | 10 MHz | Matching bandwidth means similar AC response and stability behavior in feedback networks. |
| Slew Rate | 2.5 V/µs | 5 V/µs | Higher slew rate in AD8672 supports faster large-signal transitions; AD8676 is slower but adequate for precision applications. |
| Supply Voltage Range | ±5 V to ±15 V | ±5 V to ±15 V | Identical supply range allows drop-in compatibility across the same power rails. |
| Supply Current per Amplifier (Typ) | 2.5 mA | 3 mA | Lower quiescent current in AD8676 reduces power consumption, relevant for power-sensitive designs. |
| Input Bias Current (Typ) | 2 nA | 10 nA | Lower bias current reduces errors in high-impedance circuits; AD8676 is preferable for precision sensor interfaces. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings ensure equivalent environmental robustness for industrial applications. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Same package footprint enables direct PCB drop-in 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 | AD8676ARZ | AD8672AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 2 | 2 |
| Slew Rate | 2.5V/µs | 4V/µs |
| Gain Bandwidth Product | 10 MHz | 10 MHz |
| Current - Input Bias | 2 nA | 3 nA |
| Voltage - Input Offset | 12 µV | 20 µV |
| Supply Current | 2.7mA (x2 Channels) | 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 |
| Output Type | Rail-to-Rail | - |
Frequently asked questions
What are the key differences between the AD8676ARZ and AD8672AR?
The AD8676ARZ is a dual, precision, ultra-low offset voltage operational amplifier with a typical offset voltage of 10 µV and rail-to-rail output, while the AD8672AR is a dual, low noise, low power operational amplifier with a typical offset voltage of 75 µV and rail-to-rail output. The AD8676ARZ is optimized for DC precision applications, whereas the AD8672AR is optimized for low noise and AC performance.
Are the AD8676ARZ and AD8672AR pin-compatible?
Yes, both devices are offered in the standard 8-lead SOIC package with identical pinouts, allowing them to be used in the same PCB footprint. However, designers must verify that the electrical performance differences are acceptable for the target application before substituting one for the other.
Which device has lower input offset voltage, the AD8676ARZ or the AD8672AR?
The AD8676ARZ has a significantly lower typical input offset voltage of 10 µV compared to the AD8672AR's typical offset voltage of 75 µV. The AD8676ARZ is therefore better suited for precision DC applications requiring minimal offset error.
How do the noise specifications of the AD8676ARZ and AD8672AR compare?
The AD8672AR is specified with a low voltage noise density of approximately 2.8 nV/√Hz at 1 kHz, making it suitable for low noise signal conditioning. The AD8676ARZ has a higher voltage noise density of approximately 10 nV/√Hz at 1 kHz, reflecting its optimization for DC precision rather than AC noise performance.
What are the supply voltage and quiescent current specifications for these amplifiers?
Both the AD8676ARZ and AD8672AR operate from dual supplies of ±5 V to ±15 V (or single supply 10 V to 30 V). The AD8672AR typically draws about 3 mA per amplifier, while the AD8676ARZ typically draws about 2.5 mA per amplifier, making both suitable for power-sensitive designs.
Can the AD8676ARZ and AD8672AR be used interchangeably in precision instrumentation circuits?
They are not directly interchangeable in all precision instrumentation circuits. The AD8676ARZ offers superior DC offset performance, while the AD8672AR offers lower voltage noise. The choice depends on whether offset voltage or noise is the dominant error source in the specific circuit, and both should be evaluated against the application requirements.
What are the gain bandwidth and slew rate characteristics of the AD8676ARZ and AD8672AR?
The AD8672AR has a gain bandwidth product of 10 MHz and a slew rate of 5 V/µs. The AD8676ARZ has a gain bandwidth product of 10 MHz and a slew rate of 2.5 V/µs. Both offer comparable bandwidth, but the AD8672AR provides faster large-signal response.