Part A
AD8676BRZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 1652 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8676BRZ and AD8674AR are both precision operational amplifiers from Analog Devices, but they differ in channel count and package configuration, so the AD8674AR is not a direct drop-in substitute for the AD8676BRZ. The dual-channel AD8676BRZ offers lower voltage noise and higher open-loop gain, while the quad-channel AD8674AR provides four amplifiers in a larger package. Designers should validate board layout, channel requirements, and noise budget before substituting one for the other.
Channel Count
Validation required
Package Type
Validation required
Supply Voltage Range
High match
Input Voltage Noise
Validation required
Parts at a glance
Part B
AD8674AR
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 8542 PCS
- Package
- SOIC-14
- 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 | AD8676BRZ | AD8674AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 4 (Quad) | Channel count determines how many independent signal paths can be handled; a dual cannot directly replace a quad in multi-channel designs. |
| Input Offset Voltage (Max) | 12 µV | 75 µV | Lower offset voltage improves DC precision; the AD8676 is significantly more precise, which matters for high-accuracy instrumentation. |
| Input Voltage Noise Density | 2.8 nV/√Hz | 3.8 nV/√Hz | Lower noise density benefits low-level signal amplification; the AD8676 offers better noise performance. |
| Gain Bandwidth Product | 10 MHz | 10 MHz | GBW sets the achievable closed-loop bandwidth; both are comparable here, so AC performance is similar. |
| Supply Voltage Range | ±5 V to ±15 V (10 V to 30 V) | ±5 V to ±15 V (10 V to 30 V) | Compatible supply ranges allow operation in the same system rails, easing substitution at the power level. |
| Input Bias Current (Typ) | 2 nA | 10 nA | Lower bias current reduces errors in high-impedance circuits; the AD8676 is preferable for such applications. |
| Slew Rate | 2.5 V/µs | 2.5 V/µs | Slew rate limits large-signal response speed; identical values mean comparable transient behavior. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +85 °C | Wider temperature range supports harsher environments; the AD8676 is rated for higher ambient temperatures. |
| Package / Mounting | 8-Lead SOIC (Surface Mount) | 14-Lead SOIC (Surface Mount) | Different package footprints prevent direct board-level 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 | AD8676BRZ | AD8674AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 2 | 4 |
| 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 (x4 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 ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Output Type | Rail-to-Rail | - |
Frequently asked questions
What are the key differences between the AD8676BRZ and the AD8674AR?
The AD8676BRZ is a dual, precision, low-noise, low-drift operational amplifier in an 8-lead SOIC package, while the AD8674AR is a quad, precision, low-noise operational amplifier in a 14-lead SOIC package. The AD8676BRZ is specified with lower offset voltage and lower voltage noise, whereas the AD8674AR provides four amplifiers per package for higher channel density.
Are the AD8676BRZ and AD8674AR pin-compatible?
No. The AD8676BRZ is an 8-lead SOIC dual op amp, and the AD8674AR is a 14-lead SOIC quad op amp. They have different package sizes, pin counts, and pinouts, so they are not drop-in replacements for each other.
How do the noise specifications of the AD8676BRZ and AD8674AR compare?
The AD8676BRZ is specified with a voltage noise density of approximately 2.8 nV/√Hz at 1 kHz, while the AD8674AR is specified with approximately 3.8 nV/√Hz at 1 kHz. The AD8676BRZ therefore offers lower voltage noise, making it preferable for very low-noise signal chains.
What are the offset voltage and drift characteristics of each device?
The AD8676BRZ has a maximum input offset voltage of 50 µV and a typical offset voltage drift of 0.6 µV/°C. The AD8674AR has a maximum input offset voltage of 100 µV and a typical offset voltage drift of 1 µV/°C. The AD8676BRZ provides tighter DC precision.
What are the supply voltage and bandwidth specifications for the AD8676BRZ and AD8674AR?
Both devices operate from dual supplies of ±5 V to ±15 V (10 V to 30 V total). The AD8676BRZ has a gain bandwidth product of 10 MHz, and the AD8674AR has a gain bandwidth product of 10 MHz as well, so AC bandwidth is comparable between the two.
Can the AD8676BRZ be used as a replacement for the AD8674AR in an existing quad op amp design?
No. The AD8676BRZ contains only two amplifiers in an 8-lead package, while the AD8674AR contains four amplifiers in a 14-lead package. A direct replacement is not possible without redesigning the PCB to accommodate the different package, pinout, and channel count.
Which device is better suited for low-channel-count, high-precision applications?
The AD8676BRZ is better suited for low-channel-count, high-precision applications because it offers lower offset voltage, lower offset drift, and lower voltage noise in a dual configuration. The AD8674AR is preferable when four amplifiers are needed in a single package and slightly relaxed precision is acceptable.