Part A
AD8625ARUZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5178 PCS
- Package
- TSSOP-14
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8627AKS-R2 is a viable functional substitute for the AD8625ARUZ in many precision signal-conditioning applications, sharing the same JFET-input op-amp core, 5 MHz gain-bandwidth, and 5 V to 26 V supply range. However, the two parts differ in package, channel count, and shutdown capability, so the substitution is not a drop-in replacement and requires layout and feature validation before adoption.
Amplifier Topology
High match
Channel Count
Validation required
Package Type
Not compatible
Shutdown Feature
Validation required
Parts at a glance
Part B
AD8627AKS-R2
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 7361 PCS
- Package
- SC-70-5-5
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
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 | AD8627AKS-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 pin-compatible substitutes. |
| Package / Mounting | 14-Lead TSSOP (surface mount) | 5-Lead SC-70 (surface mount) | Different package footprints require different PCB layouts, so they cannot be dropped into the same board location. |
| Input Offset Voltage (max) | 50 µV | 50 µV | Low offset voltage is critical for precision DC signal accuracy; matching values indicate comparable precision performance. |
| Input Bias Current (typ) | 1 pA | 1 pA | Ultra-low bias current suits high-impedance sensor interfaces; identical values mean similar input loading behavior. |
| Gain Bandwidth Product | 5 MHz | 5 MHz | GBW sets the achievable closed-loop bandwidth and AC response; equal values indicate equivalent speed capability. |
| Slew Rate | 5 V/µs | 5 V/µs | Slew rate limits large-signal transient response; matching values mean similar dynamic performance. |
| 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) | Compatible supply range ensures the part operates in the same power rails as the original design. |
| Input Voltage Noise Density | 16 nV/√Hz | 16 nV/√Hz | Noise density affects signal-to-noise ratio in low-level applications; equal values indicate comparable noise performance. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ratings confirm both parts suit 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 | AD8627AKS-R2 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Amplifier Type | J-FET | J-FET |
| Number of Circuits | 4 | 1 |
| 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 |
| 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 AD8627AKS-R2?
The AD8625ARUZ is a dual, precision, low-power JFET-input operational amplifier supplied in a 14-lead TSSOP (RU) package, while the AD8627AKS-R2 is a single, precision, low-power JFET-input op amp supplied in a 5-lead SC70 (KS) package and delivered on a 7-inch tape-and-reel (R2). The AD8625 provides two amplifiers per package; the AD8627 provides one. Both share the same AD862x precision JFET-input core technology from Analog Devices.
Are the AD8625ARUZ and AD8627AKS-R2 electrically identical on a per-amplifier basis?
Yes. Both devices are members of the Analog Devices AD862x family and share the same core amplifier specifications, including low offset voltage, low input bias current, low noise, and rail-to-rail output. The AD8625 integrates two such amplifiers in one package, while the AD8627 integrates one. Designers should still verify the exact datasheet limits for each orderable part number before finalizing a design.
Can the AD8627AKS-R2 be used as a drop-in replacement for one channel of the AD8625ARUZ?
Functionally, the AD8627AKS-R2 provides one amplifier equivalent to a single channel of the AD8625ARUZ, but it is not a drop-in replacement. The AD8627AKS-R2 uses a 5-lead SC70 package, whereas the AD8625ARUZ uses a 14-lead TSSOP package. The PCB land patterns, pinouts, and footprint dimensions differ, so a board redesign or adapter is required.
What package types do the AD8625ARUZ and AD8627AKS-R2 use?
The AD8625ARUZ is supplied in a 14-lead TSSOP package (Analog Devices package code RU). The AD8627AKS-R2 is supplied in a 5-lead SC70 package (Analog Devices package code KS). Both are surface-mount packages, but they differ significantly in pin count and footprint area.
What does the "R2" suffix indicate on the AD8627AKS-R2?
The "R2" suffix denotes tape-and-reel packaging, specifically a 7-inch reel. This is a packaging and ordering designation rather than a change to the electrical or functional characteristics of the AD8627 device itself. The AD8625ARUZ is ordered in tube or standard reel quantities depending on the distributor, and its "Z" suffix indicates RoHS-compliant lead finish.
Are both the AD8625ARUZ and AD8627AKS-R2 RoHS compliant?
Yes. The "Z" suffix in AD8625ARUZ indicates a RoHS-compliant, lead-free finish per Analog Devices' ordering nomenclature. The AD8627AKS-R2 is also offered as a RoHS-compliant part; designers should confirm the specific orderable part number and its compliance statement on the manufacturer datasheet or distributor page before production release.
Which applications typically favor the AD8625ARUZ versus the AD8627AKS-R2?
The AD8625ARUZ, as a dual amplifier in TSSOP, suits multi-channel precision signal conditioning, filter stages, and instrumentation front ends where two matched JFET-input amplifiers are needed in a compact footprint. The AD8627AKS-R2, as a single amplifier in SC70, suits space-constrained single-channel designs such as portable instrumentation, sensor interfaces, and high-impedance transducer buffering where board area is at a premium.
Do the AD8625ARUZ and AD8627AKS-R2 share the same operating temperature range and supply voltage requirements?
Both devices are members of the same AD862x family and are specified for the industrial temperature range of −40°C to +125°C, and both operate from dual supplies of ±2.5 V to ±15 V (or single supply of 5 V to 30 V). Designers should confirm these limits against the individual datasheet for each orderable part number, as specifications are defined per device.