Part A
AD8626ARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1213 Stückzahl
- Package
- TSSOP-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD8625ARUZ and AD8626ARMZ are both quad, precision, low-power JFET-input operational amplifiers from Analog Devices sharing the same core amplifier architecture, supply range, and gain-bandwidth, making them strong functional candidates for substitution. The primary distinction is package and pinout: the AD8625ARUZ is supplied in a 14-lead TSSOP while the AD8626ARMZ is supplied in an 8-lead MSOP, so board-level footprint and pin assignment must be validated before a direct swap is approved.
Amplifier Architecture
High match
Supply Voltage Range
High match
Package Type
Validation required
Pin Configuration
Validation required
Parts at a glance
Part B
AD8625ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5178 Stückzahl
- Package
- TSSOP-14
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
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 | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 2 (Dual) | Channel count determines how many independent signal paths can be processed; a quad and a dual are not directly interchangeable in multi-channel designs. |
| Package / Case | 14-Lead TSSOP | 8-Lead MSOP | Footprint and pin count differ, so PCB layout and assembly must be redesigned; they are not drop-in replacements. |
| 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 allow both parts to operate in the same power environment without level shifting. |
| Input Offset Voltage (Max) | 50 µV | 50 µV | Low offset voltage is critical for precision DC signal accuracy; identical values mean comparable DC precision. |
| Input Bias Current (Typ) | 1 pA | 1 pA | Ultra-low bias current suits high-impedance sensor interfaces; matching values preserve input loading behavior. |
| Gain Bandwidth Product | 5 MHz | 5 MHz | GBW sets the achievable closed-loop bandwidth; identical values mean equivalent AC signal handling capability. |
| Slew Rate | 5 V/µs | 5 V/µs | Slew rate limits large-signal transient response; matching values give similar dynamic performance. |
| Input Voltage Noise Density | 16 nV/√Hz | 16 nV/√Hz | Noise density affects SNR in low-level signal chains; identical values preserve noise performance. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ranges ensure both parts meet the same environmental requirements. |
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 | AD8626ARMZ | AD8625ARUZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | J-FET | J-FET |
| Number of Circuits | 2 | 4 |
| 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 (x2 Channels) | 710µA (x4 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 key differences between the AD8625ARUZ and AD8626ARMZ?
The AD8625ARUZ is a quad-channel precision JFET-input operational amplifier supplied in a 14-lead TSSOP (RU) package, while the AD8626ARMZ is a dual-channel version of the same amplifier family supplied in an 8-lead MSOP (RM) package. Both share the same core amplifier design and similar precision JFET-input characteristics, but differ in channel count and package footprint.
Are the AD8625ARUZ and AD8626ARMZ electrically identical on a per-channel basis?
Yes. Both devices are members of the same AD862x precision JFET-input op amp family and are specified with the same per-channel performance characteristics, including low offset voltage, low input bias current, and low noise. The primary differences are channel count and package, not the per-amplifier electrical specifications.
Can the AD8626ARMZ be used as a drop-in replacement for the AD8625ARUZ?
No. The AD8625ARUZ is a quad device in a 14-lead TSSOP, while the AD8626ARMZ is a dual device in an 8-lead MSOP. The channel count and package pinout differ, so a direct drop-in substitution is not possible without a PCB redesign and validation against the manufacturer datasheet.
What package types do the AD8625ARUZ and AD8626ARMZ use?
The AD8625ARUZ uses a 14-lead TSSOP package (RU suffix). The AD8626ARMZ uses an 8-lead MSOP package (RM suffix). Both are surface-mount packages, but their footprints and pin counts are not interchangeable.
What are typical applications for these JFET-input operational amplifiers?
Both the AD8625ARUZ and AD8626ARMZ are suited to precision signal-conditioning applications requiring low input bias current and low noise, such as photodiode amplification, high-impedance sensor interfaces, precision filters, and instrumentation front ends. The quad AD8625ARUZ suits higher channel-count designs, while the dual AD8626ARMZ suits compact two-channel designs.
Do both devices operate from the same supply voltage range?
Yes. As members of the same AD862x family, both the AD8625ARUZ and AD8626ARMZ are specified for the same supply voltage range and similar quiescent current per amplifier. Designers should confirm exact limits against the respective manufacturer datasheets before finalizing a design.
Which device should be selected for a space-constrained two-channel design?
The AD8626ARMZ is the appropriate choice for a compact two-channel design because it integrates two amplifiers in an 8-lead MSOP package. The AD8625ARUZ, being a quad device in a 14-lead TSSOP, would consume more board area and provide two unused channels in a two-channel application.