Part A
AD8676ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4850 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The AD8676ARZ and AD8672AR-REEL are both dual-channel, low-noise precision operational amplifiers from Analog Devices in the same 8-lead SOIC package, sharing identical pinout and supply voltage range. The AD8676ARZ offers lower voltage noise and higher open-loop gain, while the AD8672AR-REEL provides higher output current drive and faster slew rate. Both are viable functional substitutes in most precision signal-conditioning applications, though the AD8676ARZ is preferable where lowest noise and highest DC accuracy are critical, and the AD8672AR-REEL is preferable where greater output drive and dynamic performance are required.
Package Type
High match
Channel Count
High match
Input Voltage Noise
Validation required
Output Current Drive
Validation required
Parts at a glance
Part B
AD8672AR-REEL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4217 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
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-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual op-amps, so channel count is identical and does not affect substitutability. |
| Input Offset Voltage (Max) | 50 µV | 75 µV | Lower offset voltage improves DC precision; the AD8676 offers tighter offset for high-accuracy signal chains. |
| Input Bias Current (Typ) | 2 nA | 3 nA | Lower bias current reduces errors in high-impedance sensor and feedback networks. |
| Input Voltage Noise Density (Typ) | 2.8 nV/√Hz | 2.8 nV/√Hz | Low voltage noise is critical for precision amplification of small signals; both parts are equivalent here. |
| Gain Bandwidth Product | 10 MHz | 10 MHz | GBW determines closed-loop bandwidth and settling behavior; identical values mean similar dynamic performance. |
| Slew Rate | 2.5 V/µs | 2.5 V/µs | Slew rate limits large-signal response; matching values indicate comparable transient handling. |
| Supply Voltage Range | ±5 V to ±15 V | ±5 V to ±15 V | Compatible supply ranges allow drop-in use in the same power rails without redesign. |
| Supply Current per Amplifier (Typ) | 2.5 mA | 2.5 mA | Quiescent current affects power budget and thermal design; identical draw simplifies substitution. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Matching temperature ratings ensure both parts meet the same environmental requirements. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Same package footprint enables 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 | AD8676ARZ | AD8672AR-REEL |
|---|---|---|
| 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 primary differences between the AD8676ARZ and AD8672AR-REEL?
The AD8676ARZ is a dual, precision, ultra-low offset voltage operational amplifier featuring a typical offset voltage of 10 µV and rail-to-rail output, supplied in an 8-lead SOIC package. The AD8672AR-REEL is a dual, precision, low noise operational amplifier with a typical offset voltage of 75 µV and rail-to-rail output, supplied in an 8-lead SOIC package on tape and reel. The AD8676 is optimized for lower offset voltage and lower input bias current, while the AD8672 offers lower voltage noise density.
Are the AD8676ARZ and AD8672AR-REEL pin-compatible?
Yes. Both devices are dual operational amplifiers offered in the standard 8-lead SOIC package with the same pinout: pin 1 and 2 are the outputs, pins 3 and 6 are the inverting inputs, pins 5 and 8 are the non-inverting inputs, and pins 4 and 7 are the negative and positive supply pins respectively. This allows them to share the same PCB footprint, though electrical differences must be evaluated before substitution.
How do the input offset voltage specifications compare between the AD8676ARZ and AD8672AR-REEL?
The AD8676ARZ specifies a maximum input offset voltage of 50 µV (typical 10 µV), making it suitable for high-precision DC applications. The AD8672AR-REEL specifies a maximum input offset voltage of 125 µV (typical 75 µV). The AD8676 therefore provides tighter offset performance for precision signal conditioning.
How do the voltage noise specifications of the AD8676ARZ and AD8672AR-REEL differ?
The AD8672AR-REEL features a voltage noise density of approximately 2.8 nV/√Hz at 1 kHz, which is lower than the AD8676ARZ specification of approximately 2.8 nV/√Hz at 1 kHz for the AD8676 family; however, the AD8676 is optimized for low offset and low bias current rather than lowest noise. Designers should consult the respective datasheets for exact noise curves across frequency.
What are the input bias current characteristics of the AD8676ARZ and AD8672AR-REEL?
The AD8676ARZ features a typical input bias current of 2 nA (maximum 10 nA), which is lower than the AD8672AR-REEL typical input bias current of 12 nA (maximum 40 nA). The lower bias current of the AD8676 makes it preferable for high-impedance sensor interfaces and precision integrator circuits.
Do the AD8676ARZ and AD8672AR-REEL share the same supply voltage range and quiescent current?
Both devices operate from dual supplies of ±5 V to ±15 V (or single supply 10 V to 30 V). The AD8676ARZ typically draws 2.5 mA per amplifier, while the AD8672AR-REEL typically draws 3 mA per amplifier. Both are unity-gain stable and feature rail-to-rail output swing.
What is the difference in packaging and ordering between the AD8676ARZ and AD8672AR-REEL?
The AD8676ARZ is supplied in an 8-lead SOIC package in tube or tray format, with the "Z" suffix indicating RoHS-compliant lead-free construction. The AD8672AR-REEL is supplied in an 8-lead SOIC package on tape and reel for automated assembly. Both are RoHS-compliant, but the ordering quantity and packaging format differ.
Can the AD8676ARZ be used as a direct replacement for the AD8672AR-REEL in an existing design?
Because both are dual op amps in the same 8-lead SOIC pinout with compatible supply ranges, the AD8676ARZ can often be substituted for the AD8672AR-REEL when lower offset voltage and lower input bias current are required. However, the AD8672 offers lower voltage noise, so the substitution must be validated against the noise, bandwidth, and stability requirements of the specific application using the manufacturer datasheets.