Part A
AD8626ARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1213 PCS
- Package
- TSSOP-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8626ARMZ and AD8625ARU are both dual, precision, low-power JFET-input operational amplifiers from Analog Devices sharing the same core amplifier architecture, supply range, and unity-gain stability, making them functionally interchangeable in most signal-conditioning designs. The primary distinction is package and pinout: the AD8626ARMZ is supplied in an 8-lead MSOP while the AD8625ARU is supplied in an 8-lead TSSOP, so PCB footprint and layout must be validated before substitution. Electrical performance across gain bandwidth, offset voltage, and supply current is closely aligned, supporting a high-confidence functional replacement pending package-level verification.
Amplifier Architecture
High match
Supply Voltage Range
High match
Package Type
Validation required
Pin Configuration
Validation required
Parts at a glance
Part B
AD8625ARU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4013 PCS
- Package
- TSSOP-14
- 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 | AD8626ARMZ | AD8625ARU | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 4 (Quad) | Channel count determines how many independent signal paths can be processed; a dual cannot directly replace a quad in multi-channel designs. |
| Package / Mounting Type | 8-Lead MSOP (Surface Mount) | 14-Lead TSSOP (Surface Mount) | Footprint and pin count must match the PCB layout; different packages require board redesign and are not drop-in compatible. |
| 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) | Operating supply range defines compatibility with the system power rails; identical ranges allow use in the same voltage domain. |
| Input Offset Voltage (Max) | 50 µV | 50 µV | Low offset voltage is critical for precision DC accuracy; matching values preserve measurement accuracy in precision signal chains. |
| Input Bias Current (Typ) | 1 pA | 1 pA | Ultra-low bias current enables high-impedance sensor interfacing; identical values maintain performance in photodiode and pH probe applications. |
| Gain Bandwidth Product | 5 MHz | 5 MHz | GBW sets the achievable closed-loop bandwidth; matching values ensure equivalent AC signal handling capability. |
| Slew Rate | 5 V/µs | 5 V/µs | Slew rate limits large-signal transient response; identical values preserve dynamic behavior in the same circuit. |
| Input Voltage Noise Density | 16 nV/√Hz | 16 nV/√Hz | Noise density affects the SNR of low-level signals; matching values keep noise performance consistent. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range defines environmental robustness; identical ratings allow use in the same operating environments. |
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 | AD8625ARU |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| 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 primary differences between the AD8626ARMZ and AD8625ARU?
The AD8626ARMZ is a dual, low-power, precision JFET-input operational amplifier supplied in an 8-lead MSOP (RM) package, while the AD8625ARU is a quad, low-power, precision JFET-input operational amplifier supplied in a 14-lead TSSOP (RU) package. The core difference is channel count (dual vs. quad) and package footprint, which affects PCB layout and thermal considerations.
Are the AD8626ARMZ and AD8625ARU pin-compatible?
No. The AD8626ARMZ uses an 8-lead MSOP pinout for a dual amplifier, whereas the AD8625ARU uses a 14-lead TSSOP pinout for a quad amplifier. The pin counts, pin functions, and package dimensions differ, so they are not drop-in replacements for one another.
Do both parts share the same JFET-input precision amplifier architecture?
Yes. Both the AD8626 and AD8625 are members of the same precision JFET-input operational amplifier family from Analog Devices, featuring low input bias current, low offset voltage, and low noise, making them suitable for high-impedance sensor and precision signal-conditioning applications.
What supply voltage range do the AD8626ARMZ and AD8625ARU support?
Both devices are specified for dual-supply operation of ±5 V to ±15 V (or single-supply equivalents of 10 V to 30 V), consistent with the AD862x family datasheet. Designers should confirm the exact supply limits against the official Analog Devices datasheet for the specific grade before finalizing the design.
Can the AD8625ARU be used where an AD8626ARMZ was originally designed in?
Not directly. Because the AD8625ARU is a quad device in a 14-lead TSSOP and the AD8626ARMZ is a dual device in an 8-lead MSOP, the PCB land pattern, pin assignments, and channel count differ. A redesign of the layout and validation of the additional channels would be required.
Which part is better suited for multi-channel precision signal conditioning?
The AD8625ARU, being a quad amplifier, is better suited for multi-channel precision signal conditioning where four independent low-power JFET-input amplifiers are needed in a single package. The AD8626ARMZ is appropriate for dual-channel designs where board space and channel count are limited.
Are both parts available in RoHS-compliant package options?
Both the AD8626ARMZ (8-lead MSOP) and AD8625ARU (14-lead TSSOP) are offered in RoHS-compliant package options per Analog Devices ordering information. Customers should verify the specific orderable part number suffix against the manufacturer's product page to confirm compliance for their procurement requirements.