Part A
AD8674ARUZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2550 個数
- Package
- TSSOP-14
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The AD8674ARUZ and AD8672ARMZ-R2 are both precision, low-noise operational amplifiers from the same Analog Devices family, sharing identical supply voltage ranges, low input offset voltage, and rail-to-rail output behavior. However, they differ in channel count and package footprint, so the AD8672ARMZ-R2 can serve as a functional substitute only where a dual amplifier in an MSOP package is acceptable in place of a quad amplifier in a TSSOP package. Designers must verify channel count requirements and PCB land pattern compatibility before substituting.
Channel Count
Validation required
Package Type
Validation required
Supply Voltage Range
High match
Input Offset Voltage
High match
Parts at a glance
Part B
AD8672ARMZ-R2
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3637 個数
- Package
- TSSOP-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
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 | AD8672ARMZ-R2 | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 2 (Dual) | Channel count determines how many independent signal paths can be processed in one package; a quad cannot directly replace a dual in a board designed for two channels without layout changes. |
| Package / Mounting | 14-Lead TSSOP | 8-Lead MSOP | Different package footprints and pin counts are not drop-in compatible; the PCB land pattern must match the package for physical assembly. |
| Input Offset Voltage (max) | 75 µV | 75 µV | Low offset voltage minimizes DC error in precision signal chains; matching values indicate comparable DC accuracy. |
| Input Noise Voltage Density | 2.8 nV/√Hz (typ) | 2.8 nV/√Hz (typ) | Low voltage noise is critical for low-level signal amplification; identical noise performance supports similar SNR in precision applications. |
| Gain Bandwidth Product | 10 MHz | 10 MHz | GBW sets the achievable closed-loop bandwidth and settling behavior; equal GBW means comparable dynamic performance. |
| Slew Rate | 4 V/µs | 4 V/µs | Slew rate limits large-signal response and distortion; matching values indicate similar transient handling. |
| Supply Voltage Range | ±5 V to ±15 V (dual supply) | ±5 V to ±15 V (dual supply) | Compatible supply ranges allow operation in the same system rails without redesign of the power section. |
| Input Bias Current | 12 nA (max) | 12 nA (max) | Low bias current reduces errors in high-impedance circuits; equal values support similar precision in sensor interfaces. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings ensure both parts meet the same environmental requirements for industrial and automotive use. |
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 | AD8674ARUZ | AD8672ARMZ-R2 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 4 | 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 (x4 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 ~ 85°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8674ARUZ and AD8672ARMZ-R2?
The AD8674ARUZ is a quad operational amplifier supplied in a 14-lead TSSOP (RU-14) package, while the AD8672ARMZ-R2 is a dual operational amplifier supplied in an 8-lead MSOP (RM-8) package. Both are precision, low-noise, low-offset-voltage op amps from Analog Devices fabricated on the same process family, but they differ in channel count and package footprint, so they are not drop-in replacements for one another.
Are the AD8674ARUZ and AD8672ARMZ-R2 electrically identical per channel?
Yes. Both devices share the same per-channel core specifications from the Analog Devices AD8672/AD8674 datasheet: typically 10 nV/√Hz input voltage noise, 75 µV maximum input offset voltage, 10 MHz gain bandwidth product, and 3 nV/√Hz to 10 nV/√Hz noise performance across the audio and instrumentation range. The AD8674 integrates four such amplifiers, and the AD8672 integrates two.
Can the AD8672ARMZ-R2 be used as a substitute for the AD8674ARUZ in an existing design?
No, not directly. The AD8672ARMZ-R2 provides only two amplifiers in an 8-lead MSOP, whereas the AD8674ARUZ provides four amplifiers in a 14-lead TSSOP. The pin counts, pin functions, and PCB land patterns differ, so a board designed for the quad device cannot accept the dual device without layout changes and a review of channel requirements.
What are the package and mounting characteristics of each device?
The AD8674ARUZ uses a 14-lead TSSOP surface-mount package (RU-14 suffix), and the AD8672ARMZ-R2 uses an 8-lead MSOP surface-mount package (RM-8 suffix). Both are RoHS-compliant, lead-free surface-mount packages intended for reflow soldering, and both are specified over the extended industrial temperature range of −40 °C to +125 °C.
What supply voltage range do these amplifiers support?
Both the AD8674ARUZ and AD8672ARMZ-R2 operate from dual supplies of ±5 V to ±15 V (or equivalently single supplies of 10 V to 30 V), consistent with the AD8672/AD8674 datasheet specifications. Designs should verify the exact supply limits and derating against the current Analog Devices datasheet for the specific grade ordered.
What is the significance of the "R2" suffix on the AD8672ARMZ-R2?
The "R2" suffix denotes a tape-and-reel packaging option (reel quantity per Analog Devices ordering guide) for the AD8672ARMZ, which is the RoHS-compliant 8-lead MSOP version. The AD8674ARUZ is ordered as a tube or reel depending on the ordering code; the base part number identifies the quad TSSOP device. Buyers should confirm reel size and packaging from the distributor or the Analog Devices ordering guide before production release.
Which device should be selected for a multi-channel precision signal chain?
Select the AD8674ARUZ when four matched low-noise amplifiers are required in a single package to save board area and improve channel-to-channel thermal tracking. Select the AD8672ARMZ-R2 when only two channels are needed and the smaller 8-lead MSOP footprint is advantageous. In both cases, confirm noise, offset, and bandwidth requirements against the AD8672/AD8674 datasheet for the target circuit.