Part A
AD8662ARZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3464 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8666WARZ-RL is a viable functional replacement candidate for the AD8662ARZ in many dual op-amp applications, sharing the same SOIC-8 footprint, dual channel configuration, and general-purpose CMOS input architecture. However, the AD8666WARZ-RL is an automotive-qualified variant with a wider specified operating temperature range, while the AD8662ARZ offers a higher gain-bandwidth product and faster slew rate. Designers should validate AC performance, supply voltage headroom, and thermal margins against the target application before substituting, particularly in signal-conditioning paths where bandwidth and slew rate are critical.
Package Type
High match
Channel Count
High match
Gain Bandwidth Product
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
AD8666WARZ-RL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7734 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, 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 | AD8662ARZ | AD8666WARZ-RL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual op-amps, so channel count is compatible for direct substitution. |
| Supply Voltage Range | 5 V to 16 V (single supply) | 4.5 V to 16 V (single supply) | The wider low-end range of the AD8666WARZ-RL allows operation at slightly lower supply voltages. |
| Input Offset Voltage (max) | 65 µV | 600 µV | Lower offset voltage improves DC precision; the AD8662ARZ is significantly more precise. |
| Gain Bandwidth Product | 4 MHz | 4 MHz | Identical bandwidth means AC signal handling capability is equivalent. |
| Input Bias Current (typ) | 0.3 pA | 0.3 pA | Both are CMOS inputs with extremely low bias current, suitable for high-impedance sensor interfaces. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings ensure equivalent environmental robustness. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount) | Same package and footprint allow drop-in PCB replacement without layout changes. |
| Qualification | Standard industrial | Automotive (AEC-Q100) | The AD8666WARZ-RL is automotive-qualified, offering higher reliability for automotive applications. |
| Supply Current per Amplifier (typ) | 1.4 mA | 1.4 mA | Equivalent quiescent current means similar power consumption in the application. |
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 | AD8662ARZ | AD8666WARZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Amplifier Type | CMOS | General Purpose |
| Number of Circuits | 2 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 3.5V/µs | 3.5V/µs |
| Gain Bandwidth Product | 4 MHz | 4 MHz |
| Current - Input Bias | 0.3 pA | 0.2 pA |
| Voltage - Input Offset | 50 µV | 600 µV |
| Supply Current | 1.25mA (x2 Channels) | 1.15mA (x2 Channels) |
| Current - Output / Channel | 140 mA | 140 mA |
| Voltage - Supply Span(Min) | 5 V | 5 V |
| Voltage - Supply Span(Max) | 16 V | 16 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Series | DigiTrim® | - |
Frequently asked questions
What are the primary differences between the AD8662ARZ and the AD8666WARZ-RL?
The AD8662ARZ is a dual, precision, low-noise operational amplifier specified for the industrial temperature range of −40°C to +125°C and supplied in an 8-lead SOIC package. The AD8666WARZ-RL is also a dual op amp in an 8-lead SOIC package, but it is qualified for automotive applications per the AEC-Q100 standard and is supplied in tape-and-reel packaging. Both share the same core amplifier architecture and pinout, but differ in qualification grade and packaging format.
Are the AD8662ARZ and AD8666WARZ-RL pin-compatible?
Yes. Both devices are offered in the standard 8-lead SOIC (R-8) package with the same pinout: Pin 1 = OUT A, Pin 2 = −IN A, Pin 3 = +IN A, Pin 4 = V−, Pin 5 = +IN B, Pin 6 = −IN B, Pin 7 = OUT B, and Pin 8 = V+. This allows the two parts to share the same PCB land pattern.
Do the AD8662ARZ and AD8666WARZ-RL have the same electrical specifications?
Both devices are based on the same dual op amp core and share key specifications such as a typical gain bandwidth product of 4 MHz, a typical slew rate of 3.5 V/µs, and low input bias current. However, the AD8666WARZ-RL is the automotive-qualified variant, so designers should verify the exact datasheet limits for the temperature range and qualification conditions required by their application rather than assuming identical guaranteed limits.
What is the difference in temperature qualification between the two parts?
The AD8662ARZ is specified over the industrial temperature range of −40°C to +125°C. The AD8666WARZ-RL is qualified to the AEC-Q100 automotive standard, which imposes additional stress-test and qualification requirements beyond the industrial grade. The automotive variant is intended for use in automotive and other high-reliability applications where AEC-Q100 qualification is mandated.
What packaging format does each part use?
The AD8662ARZ is supplied in an 8-lead SOIC package in standard tube or tray quantities. The AD8666WARZ-RL is supplied in an 8-lead SOIC package in tape-and-reel format, as indicated by the "RL" suffix, which is suitable for automated pick-and-place assembly lines.
Can the AD8662ARZ be used as a drop-in replacement for the AD8666WARZ-RL in an automotive design?
No. Although the two parts are pin-compatible and share the same package, the AD8662ARZ is not AEC-Q100 qualified. An automotive design that requires AEC-Q100 qualification must use the AD8666WARZ-RL or another qualified variant. Substitution should only be made after confirming the qualification requirements of the target application against the manufacturer's documentation.
What are the typical applications for these dual operational amplifiers?
Both devices are precision, low-noise dual op amps suited to signal conditioning, sensor interfacing, active filtering, and general-purpose analog amplification. The AD8662ARZ is typically used in industrial and instrumentation designs, while the AD8666WARZ-RL is intended for automotive and other applications requiring AEC-Q100 qualification.