Part A
AD8674ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2550 PCS
- Package
- TSSOP-14
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8671ARMZ-R2 is a single-channel operational amplifier while the AD8674ARUZ is a quad-channel device, so the two are not pin-for-pin interchangeable; however, both share the same precision low-noise bipolar input architecture, comparable supply range, and similar bandwidth and voltage-noise characteristics, making the AD8671ARMZ-R2 a viable functional substitute only where a single amplifier channel can replace the four channels of the AD8674ARUZ and the board layout is redesigned accordingly.
Channel Count
Not compatible
Package Type
Not compatible
Supply Voltage Range
High match
Input Noise and Bandwidth
High match
Parts at a glance
Part B
AD8671ARMZ-R2
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9422 PCS
- Package
- TSSOP-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 | AD8674ARUZ | AD8671ARMZ-R2 | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 1 (Single) | Channel count determines whether the part can directly replace the other in a circuit; a quad and a single are not functionally interchangeable in the same footprint. |
| Package / Mounting | 14-Lead TSSOP | 8-Lead MSOP | Different package types and pin counts require different PCB footprints, so they cannot be dropped into the same board location. |
| Input Offset Voltage (max) | 75 µV | 75 µV | Low offset voltage is critical for precision DC signal accuracy; matching values indicate comparable precision performance. |
| Input Voltage Noise Density | 2.8 nV/√Hz | 2.8 nV/√Hz | Low noise density is essential for low-level signal amplification; identical values mean similar noise performance in sensitive applications. |
| Gain Bandwidth Product | 10 MHz | 10 MHz | GBW sets the achievable closed-loop bandwidth and stability; matching values indicate equivalent AC performance. |
| Slew Rate | 4 V/µs | 4 V/µs | Slew rate limits large-signal response speed; identical values mean comparable 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) | Operating supply range determines compatibility with the system power rails; matching ranges allow use in the same supply environment. |
| Input Bias Current (max) | 12 nA | 12 nA | Low bias current minimizes errors in high-impedance circuits; matching values indicate similar input loading behavior. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Temperature range defines environmental robustness; matching ranges mean equivalent suitability for industrial temperature conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8674ARUZ | AD8671ARMZ-R2 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 4 | 1 |
| 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 (x4 Channels) | 3mA |
| Current - Output / Channel | 20 mA | 30 mA |
| Voltage - Supply Span(Min) | 10 V | 10 V |
| Voltage - Supply Span(Max) | 36 V | 36 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8674ARUZ and AD8671ARMZ-R2?
The AD8674ARUZ is a quad operational amplifier supplied in a 14-lead TSSOP package, while the AD8671ARMZ-R2 is a single operational amplifier supplied in an 8-lead MSOP package. Both are precision, low-noise, low-offset-voltage op amps from Analog Devices, but they differ in channel count and package footprint, making them suited to different board-level requirements.
Are the AD8674ARUZ and AD8671ARMZ-R2 electrically identical on a per-channel basis?
Both devices belong to the same AD8671/AD8672/AD8674 precision op amp family and share the same core amplifier design and typical performance characteristics, including low voltage noise and low offset voltage. However, because they are different channel-count variants, designers should confirm supply current, package thermal behavior, and any channel-count-dependent specifications against the respective Analog Devices datasheets before treating them as per-channel equivalents.
Can the AD8671ARMZ-R2 be used as a direct drop-in replacement for one channel of the AD8674ARUZ?
No. The AD8671ARMZ-R2 is an 8-lead MSOP single amplifier and the AD8674ARUZ is a 14-lead TSSOP quad amplifier, so the packages, pin counts, and PCB land patterns are not interchangeable. A direct drop-in replacement is not possible without a board redesign.
What are the package and pin-count differences between these two parts?
The AD8674ARUZ uses a 14-lead TSSOP package housing four independent op amps. The AD8671ARMZ-R2 uses an 8-lead MSOP package housing a single op amp. The suffix "Z" in both part numbers indicates RoHS-compliant lead-free construction per Analog Devices nomenclature.
Which part should be selected for a multi-channel signal conditioning design?
For designs requiring four matched precision amplifiers in a compact footprint, the AD8674ARUZ quad amplifier is the appropriate choice. For single-channel applications where board space and channel count are minimal, the AD8671ARMZ-R2 single amplifier is more suitable. Selection should be based on required channel count, package size, and PCB layout constraints.
Do both parts share the same low-noise and precision characteristics?
Both are members of the Analog Devices AD8671/AD8672/AD8674 family, which is specified for low voltage noise and low offset voltage, making them suitable for precision instrumentation and signal conditioning. Exact numerical limits should be verified on the individual Analog Devices datasheets for each part number, since specifications are documented per device variant.
What does the "R2" suffix on the AD8671ARMZ-R2 indicate?
The "R2" suffix denotes a tape-and-reel packaging quantity option specified by Analog Devices for that orderable part number. It does not change the electrical performance of the device; it only defines the shipping and packaging format for production assembly.