Part A
AD8625ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5178 PCS
- Package
- TSSOP-14
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8626ARMZ-R2 is a viable functional replacement candidate for the AD8625ARUZ in applications tolerant of reduced bandwidth and tighter supply voltage headroom, provided the board layout is redesigned for the MSOP-8 footprint and the lower gain-bandwidth product is acceptable for the target signal chain.
Package Type
Validation required
Channel Count
High match
Gain Bandwidth Product
Validation required
Supply Voltage Range
High match
Parts at a glance
Part B
AD8626ARMZ-R2
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2601 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 | AD8625ARUZ | AD8626ARMZ-R2 | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 2 (Dual) | Channel count determines whether the part can directly replace the other in a circuit; a quad and a dual are not functionally interchangeable in the same PCB 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. |
| Supply Voltage Range | 5 V to 26 V (±2.5 V to ±13 V) | 5 V to 26 V (±2.5 V to ±13 V) | Matching supply ranges ensure both parts operate under the same power conditions, which is essential for substitutability. |
| Input Offset Voltage (max) | 50 µV | 50 µV | Low offset voltage is critical for precision DC signal accuracy; identical values mean comparable DC performance. |
| Input Bias Current (typ) | 1 pA | 1 pA | Ultra-low bias current is important for high-impedance sensor interfaces; matching values preserve input loading behavior. |
| Gain Bandwidth Product | 5 MHz | 5 MHz | GBW sets the achievable signal bandwidth and closed-loop stability; identical values mean equivalent AC performance. |
| Slew Rate | 5 V/µs | 5 V/µs | Slew rate limits large-signal response speed; matching values ensure comparable transient behavior. |
| Input Voltage Noise Density | 16 nV/√Hz | 16 nV/√Hz | Noise density affects signal-to-noise ratio in precision applications; identical values preserve noise performance. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ranges ensure both parts are suitable for the same environmental conditions. |
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 | AD8625ARUZ | AD8626ARMZ-R2 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Amplifier Type | J-FET | J-FET |
| Number of Circuits | 4 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 5V/µs | 5V/µs |
| Gain Bandwidth Product | 5 MHz | 5 MHz |
| Current - Input Bias | 0.25 pA | 0.25 pA |
| Voltage - Input Offset | 350 µV | 350 µV |
| Supply Current | 710µA (x4 Channels) | 710µA (x2 Channels) |
| Current - Output / Channel | 15 mA | 15 mA |
| Voltage - Supply Span(Min) | 5 V | 5 V |
| Voltage - Supply Span(Max) | 26 V | 26 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary differences between the AD8625ARUZ and AD8626ARMZ-R2?
The AD8625ARUZ is a dual, precision JFET-input operational amplifier supplied in a 14-lead TSSOP (RU) package, while the AD8626ARMZ-R2 is a dual, precision JFET-input op amp in an 8-lead MSOP (RM) package. Both share the same AD862x core amplifier family, but differ in package, pin count, and the R2 suffix on the AD8626ARMZ-R2 denotes a tape-and-reel packaging option.
Are the AD8625ARUZ and AD8626ARMZ-R2 electrically identical amplifiers?
Both devices belong to the Analog Devices AD862x precision JFET-input amplifier family and share the same core amplifier design and typical specifications, including low offset voltage, low input bias current, and rail-to-rail output. However, because they are different orderable models with different packages, designers should verify the exact datasheet parameters for each specific part number before substitution.
Can the AD8626ARMZ-R2 be used as a drop-in replacement for the AD8625ARUZ?
No, they are not drop-in replacements. The AD8625ARUZ uses a 14-lead TSSOP package, while the AD8626ARMZ-R2 uses an 8-lead MSOP package. The pin counts and PCB land patterns differ, so a board redesign or adapter is required. Electrical equivalence must also be confirmed against the respective datasheets.
What does the R2 suffix on the AD8626ARMZ-R2 indicate?
The R2 suffix on the AD8626ARMZ-R2 denotes a tape-and-reel packaging option from Analog Devices, intended for automated assembly. The base part, AD8626ARMZ, is the same device in an 8-lead MSOP package; the R2 designation refers to reel quantity and packaging format, not to electrical performance.
What are the package and pin-count differences between the two parts?
The AD8625ARUZ is housed in a 14-lead TSSOP package, while the AD8626ARMZ-R2 is housed in an 8-lead MSOP package. The difference in pin count reflects different package footprints and pinouts, which must be accounted for in PCB layout and assembly.
Are both parts precision JFET-input operational amplifiers?
Yes. Both the AD8625ARUZ and AD8626ARMZ-R2 are dual, precision JFET-input operational amplifiers from Analog Devices' AD862x family, featuring low input bias current and low offset voltage suitable for precision signal conditioning. Designers should consult the official Analog Devices datasheet for the exact guaranteed specifications of each orderable part.
Which part should be selected for a space-constrained design?
The AD8626ARMZ-R2, in the 8-lead MSOP package, occupies a smaller PCB footprint than the 14-lead TSSOP AD8625ARUZ, making it preferable for space-constrained designs, provided its pinout and electrical specifications meet the application requirements.