Part A
AD8671ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7405 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8671ARZ and AD8672AR-REEL7 are both precision low-noise operational amplifiers from the same Analog Devices family, sharing identical core electrical characteristics such as supply voltage range, input offset voltage, and noise performance. The primary distinction is channel count: the AD8671ARZ is a single-channel device while the AD8672AR-REEL7 is a dual-channel device, and the AD8672AR-REEL7 is supplied in tape-and-reel packaging. For applications requiring only one amplifier channel, the AD8671ARZ is a direct functional substitute; for dual-channel requirements, the AD8672AR-REEL7 is the appropriate choice. Designers should confirm channel count and packaging needs before substitution.
Channel Count
Validation required
Package Type
High match
Supply Voltage Range
High match
Input Noise Density
High match
Parts at a glance
Part B
AD8672AR-REEL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2165 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 | AD8671ARZ | AD8672AR-REEL7 | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 2 | Determines how many independent op-amp channels are available in a single package, directly affecting circuit density and channel count. |
| Input Offset Voltage (max) | 75 µV | 75 µV | Low offset voltage is critical for precision DC signal conditioning and minimizes output error in high-gain configurations. |
| Input Voltage Noise Density | 2.8 nV/√Hz | 2.8 nV/√Hz | Low voltage noise is essential for low-level signal amplification and high-resolution data acquisition systems. |
| Gain Bandwidth Product | 10 MHz | 10 MHz | Sets the achievable closed-loop bandwidth and slew performance for the amplifier in a given gain configuration. |
| Slew Rate | 4 V/µs | 4 V/µs | Determines how fast the output can respond to large signal steps, affecting large-signal bandwidth and distortion. |
| Supply Voltage Range | ±5 V to ±15 V | ±5 V to ±15 V | Defines the allowable power supply rails and headroom for the amplifier in the target system. |
| Supply Current per Amplifier (typ) | 3 mA | 3 mA | Affects total power consumption and thermal budget, especially important in multi-channel and portable designs. |
| Input Bias Current (typ) | 3 nA | 3 nA | Low bias current reduces DC errors in high-impedance sensor and feedback networks. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package footprint and pinout must match for board-level drop-in compatibility; both share the same SOIC outline but differ in channel count. |
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 | AD8671ARZ | AD8672AR-REEL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 1 | 2 |
| Slew Rate | 4V/µs | 4V/µs |
| Gain Bandwidth Product | 10 MHz | 10 MHz |
| Current - Input Bias | 3 nA | 3 nA |
| Voltage - Input Offset | 20 µV | 20 µV |
| Supply Current | 3mA | 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 key differences between the AD8671ARZ and AD8672AR-REEL7?
The AD8671ARZ is a single precision operational amplifier in an 8-lead SOIC package, while the AD8672AR-REEL7 is a dual precision operational amplifier in an 8-lead SOIC package supplied on a 7-inch reel. Both share the same core amplifier design and similar precision specifications, but differ in channel count and packaging format.
Are the AD8671ARZ and AD8672AR-REEL7 pin-compatible?
No. The AD8671ARZ (single) and AD8672AR-REEL7 (dual) have different pinouts despite both using an 8-lead SOIC package. The single device uses the standard single op-amp pinout, while the dual device uses the standard dual op-amp pinout, so they are not drop-in replacements for each other.
What are the common precision specifications shared by the AD8671ARZ and AD8672AR-REEL7?
Both devices are precision op amps featuring low offset voltage (typically 75 µV maximum for the A grade), low input bias current, low input voltage noise of approximately 2.8 nV/√Hz, and a unity-gain bandwidth of about 10 MHz. They operate over the extended industrial temperature range of −40°C to +125°C.
What supply voltage range do the AD8671ARZ and AD8672AR-REEL7 support?
Both devices operate from dual supplies of ±5 V to ±15 V, or equivalently from a single supply of 10 V to 30 V. They are specified for operation over the extended industrial temperature range of −40°C to +125°C.
What does the REEL7 suffix indicate on the AD8672AR-REEL7?
The REEL7 suffix indicates that the AD8672AR-REEL7 is supplied in tape-and-reel packaging on a 7-inch reel, which is intended for automated pick-and-place assembly. The AD8671ARZ is supplied in tube or tray format; the Z suffix denotes a RoHS-compliant lead-free package.
Can the AD8671ARZ be used to replace one channel of the AD8672AR-REEL7 in an existing design?
Functionally, one channel of the AD8672AR-REEL7 performs the same amplification function as the AD8671ARZ, but a direct substitution requires verifying the PCB footprint and pinout, since the single and dual devices use different pin assignments in the same 8-lead SOIC package. The design must be revalidated against the manufacturer datasheet before substitution.
What are the typical applications for the AD8671ARZ and AD8672AR-REEL7?
Both precision op amps are suited for applications requiring low noise and low offset, such as precision instrumentation, sensor signal conditioning, active filters, and high-resolution data acquisition systems. The single AD8671ARZ fits single-channel signal paths, while the dual AD8672AR-REEL7 suits multi-channel designs where board space and channel matching matter.