Part A
AD8630ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6520 PCS
- Package
- SOIC-14
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8639WARZ-R7 is a viable functional replacement candidate for the AD8630ARZ in many designs, sharing the same zero-drift amplifier architecture, dual-channel configuration, and SOIC-8 footprint. However, the AD8639WARZ-R7 is an automotive-qualified variant with a wider supply range and higher bandwidth, so supply voltage headroom, gain-bandwidth requirements, and operating-temperature margins should be validated against the target application before substitution.
Amplifier Architecture
High match
Channel Count
High match
Package Type
High match
Supply Voltage Range
Validation required
Parts at a glance
Part B
AD8639WARZ-R7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6203 PCS
- Package
- SOIC-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 | AD8630ARZ | AD8639WARZ-R7 | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 2 (Dual) | Channel count determines how many independent signal paths can be handled; a quad and a dual are not directly interchangeable in a board layout. |
| Input Offset Voltage (Max) | 5 µV | 5 µV | Low offset is critical for precision DC signal conditioning; both are zero-drift class parts with comparable offset performance. |
| Supply Voltage Range | 2.7 V to 5.5 V (single) / ±1.35 V to ±2.75 V (dual) | 2.7 V to 5.5 V (single) / ±1.35 V to ±2.75 V (dual) | Operating supply range must match the system rail to ensure proper biasing and output swing. |
| Gain Bandwidth Product | 2.5 MHz | 1.5 MHz | GBW sets the achievable closed-loop bandwidth; a lower GBW part may not meet high-frequency signal requirements. |
| Input Bias Current (Typ) | 30 pA | 30 pA | Very low bias current minimizes errors in high-impedance sensor and feedback networks. |
| Supply Current per Amplifier (Typ) | 0.9 mA | 0.9 mA | Quiescent current affects power budget, especially in battery-powered or multi-channel designs. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Industrial/automotive temperature ratings ensure reliable operation across harsh environments. |
| Package / Mounting | 14-Lead SOIC (Surface Mount) | 8-Lead SOIC (Surface Mount) | Package footprint and pin count must match the PCB layout; different packages are not drop-in compatible. |
| Qualification / Grade | Standard Industrial | Automotive (AEC-Q100) | Automotive-qualified parts meet stricter reliability and quality standards required for vehicle applications. |
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 | AD8630ARZ | AD8639WARZ-R7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Active |
| Amplifier Type | Zero-Drift | Chopper (Zero-Drift) |
| Number of Circuits | 4 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 1V/µs | 2V/µs |
| Gain Bandwidth Product | 2.5 MHz | 1.5 MHz |
| Current - Input Bias | 30 pA | 1 pA |
| Voltage - Input Offset | 1 µV | 3 µV |
| Supply Current | - | 1.25mA (x2 Channels) |
| Current - Output / Channel | 30 mA | 37 mA |
| Voltage - Supply Span(Min) | 2.7 V | 5 V |
| Voltage - Supply Span(Max) | 5 V | 16 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| -3 dB Bandwidth | 2.5 MHz | - |
Frequently asked questions
What are the primary differences between the AD8630ARZ and AD8639WARZ-R7?
The AD8630ARZ is a quad, zero-drift, rail-to-rail operational amplifier in a 14-lead SOIC package, while the AD8639WARZ-R7 is a dual, zero-drift, rail-to-rail operational amplifier in an 8-lead SOIC package supplied in 7-inch reel packaging. The AD8630ARZ provides four amplifiers per package, whereas the AD8639WARZ-R7 provides two amplifiers per package.
Are the AD8630ARZ and AD8639WARZ-R7 pin-compatible?
No. The AD8630ARZ uses a 14-lead SOIC package with four amplifiers, and the AD8639WARZ-R7 uses an 8-lead SOIC package with two amplifiers. The package sizes, pin counts, and pin functions differ, so they are not pin-compatible and cannot be interchanged on the same PCB footprint.
Do both parts share the same zero-drift amplifier architecture?
Yes. Both the AD8630ARZ and AD8639WARZ-R7 are zero-drift operational amplifiers that use auto-zeroing or chopper-stabilized techniques to achieve very low offset voltage and offset voltage drift over temperature, making them suitable for precision DC and low-frequency applications.
What supply voltage range do the AD8630ARZ and AD8639WARZ-R7 support?
Both devices operate from a single supply of 2.7 V to 5 V or a dual supply of ±1.35 V to ±2.5 V, as specified in the Analog Devices datasheets. Designs should verify the exact supply range against the latest manufacturer datasheet before use.
Can the AD8639WARZ-R7 be used as a drop-in replacement for the AD8630ARZ?
No. The AD8639WARZ-R7 is a dual amplifier in an 8-lead SOIC package, while the AD8630ARZ is a quad amplifier in a 14-lead SOIC package. Because the channel count, package, and pinout differ, a direct drop-in replacement is not possible without a PCB redesign.
What is the significance of the -R7 suffix on the AD8639WARZ-R7?
The -R7 suffix indicates reel packaging, specifically a 7-inch reel, as defined in Analog Devices ordering information. It does not change the electrical specifications of the device; it only specifies the packaging format for automated assembly.
Are both parts suitable for precision low-frequency signal conditioning?
Yes. Both the AD8630ARZ and AD8639WARZ-R7 are zero-drift amplifiers with low offset voltage and low offset drift, making them appropriate for precision low-frequency signal conditioning, sensor interfaces, and DC instrumentation where offset stability is critical.
How should the choice between the AD8630ARZ and AD8639WARZ-R7 be made?
The choice depends primarily on channel count and board space. Select the AD8630ARZ when four amplifiers are needed in a single 14-lead SOIC package, and select the AD8639WARZ-R7 when two amplifiers in an 8-lead SOIC package are sufficient. Electrical performance should be confirmed against the respective datasheets for the target application.