Part A
AD8676BRZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1652 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8676ARZ and AD8676BRZ are functionally interchangeable operational amplifiers sharing identical core electrical specifications, pinout, and package. The BRZ grade offers tighter guaranteed offset voltage and drift tolerances, making it a valid drop-in candidate where the ARZ grade's looser DC precision limits are acceptable, or an upgrade where tighter precision is required.
Package and Pinout
High match
Amplifier Core Specifications
High match
Offset Voltage Grade
Validation required
Operating Temperature Range
High match
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 | AD8676BRZ | Why it matters |
|---|---|---|---|
| Input Offset Voltage (Vos, max) | 50 µV | 12 µV | Lower offset voltage improves DC precision; the B grade offers tighter offset for high-accuracy signal chains. |
| Input Offset Voltage Drift (max) | 0.6 µV/°C | 0.2 µV/°C | Lower drift maintains accuracy over temperature; the B grade is preferable for precision applications across temperature. |
| Input Bias Current (max) | 2 nA | 2 nA | Low bias current minimizes errors in high-impedance circuits; both grades share the same typical bias current specification. |
| Input Voltage Noise Density (typ, 1 kHz) | 2.8 nV/√Hz | 2.8 nV/√Hz | Low voltage noise is critical for low-level signal amplification; both grades provide equivalent noise performance. |
| Gain Bandwidth Product (typ) | 10 MHz | 10 MHz | GBW determines the achievable closed-loop bandwidth; identical GBW means equivalent AC performance for both grades. |
| Slew Rate (typ) | 2.5 V/µs | 2.5 V/µs | Slew rate limits large-signal response; identical slew rate ensures the same dynamic behavior in both grades. |
| Supply Voltage Range | ±5 V to ±15 V (10 V to 30 V) | ±5 V to ±15 V (10 V to 30 V) | Wide supply range supports diverse system rails; both grades are interchangeable in this regard. |
| Operating Temperature Range | −40 °C to +125 °C | −40 °C to +125 °C | Industrial temperature range ensures operation in harsh environments; both grades are rated identically. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Identical package ensures drop-in PCB compatibility between the two grades. |
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 | AD8676ARZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 2 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 2.5V/µs | 2.5V/µs |
| Gain Bandwidth Product | 10 MHz | 10 MHz |
| Current - Input Bias | 2 nA | 2 nA |
| Voltage - Input Offset | 12 µV | 12 µV |
| Supply Current | 2.7mA (x2 Channels) | 2.7mA (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 |
Frequently asked questions
What is the difference between the AD8676ARZ and AD8676BRZ?
Both are dual, precision, low-noise operational amplifiers from Analog Devices in an 8-lead SOIC package. The primary difference is the grade: the AD8676ARZ is the standard grade, while the AD8676BRZ is the higher-grade version with tighter guaranteed specifications, notably lower offset voltage and offset voltage drift.
Are the AD8676ARZ and AD8676BRZ pin-compatible?
Yes. Both devices are offered in the same 8-lead SOIC (R-8) package with identical pinout, so they are pin-compatible and share the same PCB land pattern.
What are the key specifications of the AD8676?
The AD8676 is a dual, precision, low-noise op amp featuring very low offset voltage, low input bias current, low input voltage noise (approximately 2.8 nV/√Hz), and a unity-gain bandwidth of about 10 MHz. It operates on a wide supply range and is specified over the extended industrial temperature range.
How do the offset voltage specifications differ between the A and B grades?
The AD8676BRZ (B grade) guarantees a tighter maximum input offset voltage than the AD8676ARZ (A grade). The B grade is intended for applications requiring tighter DC precision, while the A grade offers a lower-cost option with wider offset limits.
Can the AD8676ARZ be replaced by the AD8676BRZ in an existing design?
Yes, in most cases. Because the two grades are pin-compatible and functionally identical, the AD8676BRZ can generally be used in place of the AD8676ARZ, and it provides equal or better guaranteed DC precision. Verify that the tighter specifications and any grade-specific limits are acceptable for the application.
What supply voltage range does the AD8676 support?
The AD8676 operates from a dual supply of ±5 V to ±15 V (or an equivalent single supply of 10 V to 30 V), making it suitable for a broad range of precision analog signal-conditioning applications.
In which applications are the AD8676ARZ and AD8676BRZ typically used?
Both grades are suited to precision instrumentation, medical and industrial measurement, active filtering, and low-noise signal conditioning. The AD8676BRZ is preferred where tighter offset voltage and drift specifications are required, such as high-accuracy sensor interfaces and precision data acquisition.