Part A
AD8676BRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1660 PCS
- Package
- MSOP-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8672ARMZ and AD8676BRMZ are both dual precision operational amplifiers in the same 8-lead MSOP package with identical pinout, making them strong functional replacement candidates. The AD8676BRMZ offers improved offset voltage and lower voltage noise, while the AD8672ARMZ provides higher output current drive and faster slew rate. Designers should validate supply voltage headroom, capacitive load stability, and thermal performance in the target application before substituting.
Package Type
High match
Pin Configuration
High match
Input Offset Voltage
Validation required
Output Current Drive
Validation required
Parts at a glance
Part B
AD8672ARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3239 PCS
- Package
- MSOP-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8672ARMZ | AD8676BRMZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual op-amps, so channel count matches for drop-in substitution in dual-channel circuits. |
| Input Offset Voltage (max) | 75 µV | 50 µV | Lower offset improves DC precision; the AD8676 offers tighter offset for high-accuracy signal chains. |
| Input Voltage Noise Density (1 kHz) | 2.8 nV/√Hz | 2.8 nV/√Hz | Low noise is critical for sensor and audio front-ends; both parts provide comparable noise performance. |
| Gain Bandwidth Product | 10 MHz | 10 MHz | GBW determines achievable closed-loop bandwidth; matching values support similar dynamic response. |
| Slew Rate | 5 V/µs | 5 V/µs | Slew rate limits large-signal response; identical values mean similar transient behavior. |
| 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 the parts to operate in the same power rails without redesign. |
| Supply Current per Amplifier (typ) | 3 mA | 2.5 mA | Quiescent current affects power budget; the AD8676 draws slightly less, beneficial for power-sensitive designs. |
| Input Bias Current (typ) | 10 nA | 2 nA | Lower bias current reduces errors in high-impedance circuits; the AD8676 is preferable for such applications. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings ensure both parts suit the same environmental conditions. |
| Package | 8-Lead MSOP | 8-Lead MSOP | Same package and pinout enable direct PCB footprint compatibility for substitution. |
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 | AD8676BRMZ | AD8672ARMZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 2 | 2 |
| Output Type | Rail-to-Rail | - |
| 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 |
Frequently asked questions
What are the primary differences between the AD8672ARMZ and AD8676BRMZ?
The AD8672ARMZ is a dual, low-noise, low-offset-voltage operational amplifier specified for ±5 V to ±15 V supplies, supplied in an 8-lead MSOP (RM) package. The AD8676BRMZ is a dual, ultralow-noise, low-offset-voltage op amp with rail-to-rail output, supplied in an 8-lead MSOP (RM) package. Key differences include the AD8676's rail-to-rail output stage and its lower voltage-noise density (approximately 2.8 nV/√Hz versus approximately 2.8 nV/√Hz for the AD8672, with the AD8676 specified at a lower 0.1 Hz to 10 Hz noise), and the AD8676BRMZ carries a B-grade offset-voltage specification.
Are the AD8672ARMZ and AD8676BRMZ pin-compatible?
Both devices are offered in the same 8-lead MSOP (RM) package, and their pinouts follow the standard dual-op-amp configuration (OUT A, −IN A, +IN A, V−, +IN B, −IN B, OUT B, V+). However, pin compatibility does not guarantee electrical interchangeability; the AD8676's rail-to-rail output and different noise and offset specifications must be validated against the target design before substitution.
How do the noise specifications of the AD8672ARMZ and AD8676BRMZ compare?
Both are low-noise bipolar op amps. The AD8672ARMZ is specified with a voltage-noise density of approximately 2.8 nV/√Hz at 1 kHz. The AD8676BRMZ is specified with an ultralow voltage-noise density of approximately 2.8 nV/√Hz at 1 kHz and a 0.1 Hz to 10 Hz peak-to-peak noise of approximately 0.1 µV p-p. For precision low-frequency applications, the AD8676's low-frequency noise specification is the more relevant parameter.
What are the supply-voltage ranges for the AD8672ARMZ and AD8676BRMZ?
The AD8672ARMZ operates from dual supplies of ±5 V to ±15 V (10 V to 30 V total). The AD8676BRMZ operates from dual supplies of ±5 V to ±15 V (10 V to 30 V total) as well. Both devices are therefore suitable for ±15 V precision analog signal chains, but the AD8676's rail-to-rail output provides greater output swing headroom near the supply rails.
How do the offset-voltage grades differ between the AD8672ARMZ and AD8676BRMZ?
The AD8672ARMZ is specified with a maximum input offset voltage of 75 µV (A grade). The AD8676BRMZ is specified with a maximum input offset voltage of 50 µV (B grade). The B-grade AD8676 therefore offers a tighter offset-voltage limit, which is advantageous in high-precision dc applications.
Can the AD8676BRMZ directly replace the AD8672ARMZ in an existing design?
Direct replacement requires validation. Although both are dual op amps in the 8-lead MSOP package with the same pinout, the AD8676BRMZ has a rail-to-rail output stage and different offset and noise specifications. Circuit stability, output swing, and compensation must be verified against the AD8676 datasheet before substituting it for the AD8672ARMZ.
Which device is better suited for low-frequency precision instrumentation?
The AD8676BRMZ is generally preferred for low-frequency precision instrumentation because of its tighter 50 µV maximum offset voltage, ultralow 0.1 Hz to 10 Hz noise, and rail-to-rail output. The AD8672ARMZ remains suitable for general-purpose precision amplification where its 75 µV maximum offset and standard output swing are adequate.