Part A
AD8604ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6315 PCS
- Package
- SOIC-14
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8606AR-REEL is a viable functional replacement candidate for the AD8604ARZ in dual-channel signal conditioning applications, sharing the same CMOS rail-to-rail input/output architecture, 10 MHz gain bandwidth, and 8-lead SOIC footprint. Designers must validate the reduced channel count and the tighter single-supply operating range before substituting in existing quad-channel layouts.
Amplifier Architecture
High match
Channel Count
Validation required
Package Type
High match
Supply Voltage Range
Validation required
Parts at a glance
Part B
AD8606AR-REEL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 9189 PCS
- Package
- SOIC-8
- 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 | AD8604ARZ | AD8606AR-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 2 (Dual) | Channel count determines how many independent signal paths can be handled; a quad and a dual are not directly interchangeable in multi-channel designs. |
| Input Offset Voltage (max) | 65 µV | 65 µV | Low offset voltage is critical for precision DC and low-frequency signal conditioning; matching values indicate comparable accuracy. |
| Input Bias Current (typ) | 0.2 pA | 0.2 pA | Extremely low CMOS input bias current enables high-impedance sensor interfacing and minimizes error in precision applications. |
| Gain Bandwidth Product | 8.8 MHz | 10 MHz | GBW sets the achievable closed-loop bandwidth; slight differences affect high-frequency performance and stability margins. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Single-supply operating range determines compatibility with low-voltage systems and battery-powered designs. |
| Supply Current per Amplifier (typ) | 1.2 mA | 1.2 mA | Quiescent current per amplifier affects total power budget, especially important in portable and battery-operated equipment. |
| Input Voltage Noise Density | 8 nV/√Hz | 8 nV/√Hz | Low noise density is essential for resolving small signals in audio, instrumentation, and sensor front-ends. |
| Package / Pin Count | 14-Lead SOIC | 8-Lead SOIC | Package and pin count affect PCB footprint and layout; different packages require board redesign and are not drop-in replacements. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Industrial temperature range ensures reliable operation across harsh environments and thermal extremes. |
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 | AD8604ARZ | AD8606AR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | DigiTrim® | DigiTrim® |
| Part Status | Active | Obsolete |
| Amplifier Type | CMOS | CMOS |
| Number of Circuits | 4 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 6V/µs | 5V/µs |
| Gain Bandwidth Product | 8.4 MHz | 10 MHz |
| Current - Input Bias | 0.2 pA | 1 pA |
| Voltage - Input Offset | 80 µV | 80 µV |
| Supply Current | 750µA (x4 Channels) | 1mA (x2 Channels) |
| Current - Output / Channel | 50 mA | 80 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 5.5 V | 5.5 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8604ARZ and AD8606AR-REEL?
The AD8604ARZ is a quad-channel, rail-to-rail input/output operational amplifier supplied in a 14-lead SOIC package, while the AD8606AR-REEL is a dual-channel, rail-to-rail input/output operational amplifier supplied in an 8-lead SOIC package on tape and reel. The primary differences are channel count (4 vs 2) and package pin count (14 vs 8).
Do the AD8604ARZ and AD8606AR-REEL share the same supply voltage range?
Yes. Both devices are specified for operation from 2.7 V to 5.5 V single supply (or ±1.35 V to ±2.75 V dual supply), per the Analog Devices datasheets.
Are the AD8604ARZ and AD8606AR-REEL pin-compatible?
No. The AD8604ARZ uses a 14-lead SOIC package and the AD8606AR-REEL uses an 8-lead SOIC package, so they have different pin counts and pinouts and are not drop-in replacements for each other.
What are the input offset voltage specifications for these two amplifiers?
Both the AD8604 and AD8606 are members of the Analog Devices precision op amp family and are specified with low input offset voltage on the order of tens of microvolts (typical), with the exact maximum limits defined in the respective manufacturer datasheets. Designers should consult the official AD8604 and AD8606 datasheets for the guaranteed limits over temperature.
Can the AD8606AR-REEL be used as a substitute for the AD8604ARZ in an existing design?
Not directly. The AD8606AR-REEL provides only two channels in an 8-lead package, whereas the AD8604ARZ provides four channels in a 14-lead package. Substitution requires a PCB redesign to accommodate the different package, pinout, and channel count, and must be validated against the target application requirements.
What is the significance of the "REEL" suffix on the AD8606AR-REEL?
The "REEL" suffix indicates the device is supplied in tape-and-reel packaging intended for automated surface-mount assembly, rather than in tubes or trays. The AD8604ARZ is typically supplied in tube or tray packaging; packaging format should be confirmed against the ordering guide in the respective datasheets.
Are both devices rail-to-rail input and output operational amplifiers?
Yes. Both the AD8604 and AD8606 are rail-to-rail input and output (RRIO) operational amplifiers, allowing input and output signal swings close to both supply rails, as stated in the Analog Devices datasheets.