Part A
AD8676BRZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 1652 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 AD8676BRZ and AD8672AR-REEL are both dual low-noise operational amplifiers from Analog Devices sharing the same SOIC-8 package and dual-channel topology, making the AD8672AR-REEL a viable functional substitute for the AD8676BRZ in many designs. However, the AD8676BRZ offers higher precision with lower offset voltage and lower input bias current, while the AD8672AR-REEL provides wider bandwidth and higher slew rate. Designers should validate DC precision, noise, and dynamic performance requirements before substituting, as the two parts are not identical in their precision and AC specifications.
Amplifier Topology
High match
Package and Pinout
High match
DC Precision
Validation required
Dynamic Performance
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 | AD8676BRZ | AD8672AR-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual op-amps, so channel count is compatible for dual-channel circuit designs. |
| Input Offset Voltage (max) | 50 µV | 125 µV | Lower offset voltage improves DC precision; the AD8676 is tighter, which matters for high-accuracy signal chains. |
| Input Voltage Noise Density (typ, 1 kHz) | 2.8 nV/√Hz | 8 nV/√Hz | Lower noise density benefits low-level signal amplification; the AD8676 offers significantly lower noise. |
| Gain Bandwidth Product | 10 MHz | 10 MHz | GBW determines the achievable closed-loop bandwidth; both are matched at 10 MHz. |
| Slew Rate | 2.5 V/µs | 5 V/µs | Slew rate limits large-signal response; the AD8672 is faster, which matters for higher-frequency, larger-swing signals. |
| Supply Voltage Range | ±5 V to ±15 V (10 V to 30 V) | ±5 V to ±15 V (10 V to 30 V) | Both support the same dual-supply range, so power-supply compatibility is maintained. |
| Supply Current per Amplifier (typ) | 2.7 mA | 3.0 mA | Quiescent current affects power budget; the AD8676 draws slightly less per amplifier. |
| Input Bias Current (typ) | 2 nA | 12 nA | Lower bias current reduces errors in high-impedance circuits; the AD8676 is superior here. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Both cover the industrial temperature range, so environmental compatibility is equivalent. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount, tape and reel) | Both are 8-lead SOIC, so footprint is compatible; the AD8672AR-REEL is supplied on tape and reel for automated assembly. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8676BRZ | 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 AD8676BRZ and AD8672AR-REEL?
The AD8676BRZ is a dual, precision, ultra-low offset voltage operational amplifier specified with a maximum offset voltage of 50 µV and a typical input bias current of 2 nA, supplied in an 8-lead SOIC package with a B-grade (improved) specification. The AD8672AR-REEL is a dual, precision, low noise operational amplifier with a maximum offset voltage of 100 µV, supplied in an 8-lead SOIC package in tape-and-reel format with an A-grade specification. Both are dual op amps in the same SOIC-8 footprint, but they differ in offset voltage grading, bias current, and packaging format.
Are the AD8676BRZ and AD8672AR-REEL pin-compatible?
Yes. Both devices are dual operational amplifiers offered in the standard 8-lead SOIC package with the conventional dual op amp pinout (OUT A, -IN A, +IN A, V-, +IN B, -IN B, OUT B, V+). They share the same package footprint and pin functions, so they are pin-compatible in that package.
Can the AD8676BRZ and AD8672AR-REEL be used interchangeably in a design?
They are pin-compatible in the SOIC-8 package, but interchangeability depends on the design requirements. The AD8676BRZ offers a lower maximum offset voltage (50 µV vs 100 µV) and lower typical input bias current (2 nA vs 10 nA), which matters in high-impedance or precision DC applications. The AD8672AR-REEL is supplied in tape-and-reel for automated assembly. Any substitution should be validated against the target design's offset, bias current, noise, and packaging requirements using the respective manufacturer datasheets.
What is the input offset voltage specification for each device?
The AD8676BRZ is specified with a maximum input offset voltage of 50 µV. The AD8672AR-REEL is specified with a maximum input offset voltage of 100 µV. Both are precision op amps, but the AD8676BRZ provides the tighter offset grading.
How do the input bias currents of the AD8676BRZ and AD8672AR-REEL compare?
The AD8676BRZ has a typical input bias current of 2 nA. The AD8672AR-REEL has a typical input bias current of 10 nA. The lower bias current of the AD8676BRZ is advantageous in high-source-impedance circuits where bias current contributes to offset error.
What are the supply voltage and noise characteristics of these op amps?
Both the AD8676BRZ and AD8672AR-REEL operate from dual supplies of ±5 V to ±15 V (or equivalent single supplies). Both are low-noise precision amplifiers with a typical voltage noise density of approximately 2.8 nV/√Hz at 1 kHz. These characteristics make them suitable for precision signal conditioning and instrumentation applications.
What packaging formats are available for the AD8676BRZ and AD8672AR-REEL?
The AD8676BRZ is supplied in an 8-lead SOIC package in tube format. The AD8672AR-REEL is supplied in an 8-lead SOIC package in tape-and-reel format, which is suited to automated pick-and-place assembly. The "BRZ" and "AR-REEL" suffixes denote the grade and packaging option respectively.
Which device is better suited for high-volume automated assembly?
The AD8672AR-REEL is supplied in tape-and-reel packaging, which is designed for high-volume automated pick-and-place assembly. The AD8676BRZ is supplied in tube format. For automated production lines, the tape-and-reel option of the AD8672AR-REEL is generally preferred, provided its offset and bias current specifications meet the design requirements.