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 AD8604ARZ and AD8602DR-REEL7 are both quad and dual CMOS rail-to-rail operational amplifiers from the same Analog Devices AD860x family, sharing identical per-channel AC and DC characteristics. The AD8604ARZ offers four channels in a 14-lead SOIC package, while the AD8602DR-REEL7 provides two channels in an 8-lead SOIC package on tape and reel. Because the channel count and package footprint differ, the AD8602DR-REEL7 is not a pin-for-pin drop-in for the AD8604ARZ, but it is a strong functional candidate where fewer amplifier channels are acceptable and board layout can be revised.
Channel Count
Validation required
Package Type
Validation required
Amplifier Topology
High match
Supply Voltage Range
High match
Parts at a glance
Part B
AD8602DR-REEL7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 9061 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 | AD8602DR-REEL7 | 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. |
| Package / Mounting | 14-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount) | Different package footprints and pin counts require different PCB layouts, so they cannot drop into the same board location. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Matching supply ranges ensure both parts operate correctly in the same low-voltage single-supply system. |
| Gain Bandwidth Product | 8.4 MHz | 8.4 MHz | Identical bandwidth means both can support the same signal frequencies and closed-loop gains. |
| Input Offset Voltage (max) | 750 µV | 750 µV | Offset voltage affects DC accuracy; equal values mean comparable precision in signal conditioning. |
| Input Bias Current | 1 pA (typ) | 1 pA (typ) | Very low bias current suits high-impedance sensor interfaces; matching values preserve input loading behavior. |
| Slew Rate | 5 V/µs | 5 V/µs | Slew rate limits large-signal response speed; identical values give equivalent transient performance. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Same temperature range ensures both are suitable for the same industrial and automotive environments. |
| Quiescent Supply Current (per amplifier) | 1.2 mA (typ, total) | 1.2 mA (typ, total) | Total quiescent current differs with channel count, affecting overall power budget in battery-powered designs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8604ARZ | AD8602DR-REEL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| 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 | 6V/µs |
| Gain Bandwidth Product | 8.4 MHz | 8.4 MHz |
| Current - Input Bias | 0.2 pA | 0.2 pA |
| Voltage - Input Offset | 80 µV | 1.3 mV |
| Supply Current | 750µA (x4 Channels) | 750µA (x2 Channels) |
| Current - Output / Channel | 50 mA | 50 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 AD8602DR-REEL7?
The AD8604ARZ is a quad (4-channel) rail-to-rail input/output CMOS operational amplifier in a 14-lead SOIC package, while the AD8602DR-REEL7 is a dual (2-channel) version of the same amplifier family in an 8-lead SOIC package supplied on a 7-inch reel. Both share the same core amplifier architecture, supply range, and bandwidth characteristics, but differ in channel count, package pinout, and packaging format.
Are the AD8604ARZ and AD8602DR-REEL7 electrically identical per channel?
Yes. Both devices are members of the Analog Devices AD860x family and share the same per-channel specifications, including a typical gain bandwidth of 8.4 MHz, a slew rate of 5 V/µs, rail-to-rail input and output, and low offset voltage. The primary electrical difference is the number of amplifiers integrated in the package.
What is the supply voltage range for these amplifiers?
Both the AD8604ARZ and AD8602DR-REEL7 operate from a single supply of 2.7 V to 5.5 V, and can also be operated from dual supplies (for example, ±1.35 V to ±2.75 V). This makes them suitable for low-voltage, battery-powered, and portable signal-conditioning applications.
Can the AD8602DR-REEL7 be used as a drop-in replacement for the AD8604ARZ?
No. The AD8604ARZ is a quad amplifier in a 14-lead SOIC package, whereas the AD8602DR-REEL7 is a dual amplifier in an 8-lead SOIC package. The pin counts, pin functions, and PCB land patterns differ, so a direct drop-in substitution is not possible without a board redesign or use of an adapter.
What are the input offset voltage and input bias current specifications?
Both devices feature a low typical input offset voltage of 65 µV (with a maximum of 750 µV for the A-grade) and very low input bias current, typically 0.2 pA at room temperature, owing to their CMOS inputs. These characteristics make them well suited for high-impedance sensor interfaces and precision filtering.
What packaging options distinguish the AD8604ARZ from the AD8602DR-REEL7?
The AD8604ARZ is supplied in a 14-lead SOIC (R-14) tube or tray format, while the AD8602DR-REEL7 is supplied in an 8-lead SOIC (R-8) package on a 7-inch tape-and-reel, which is intended for automated high-volume assembly. The "REEL7" suffix specifically denotes the 7-inch reel packaging.
What are the operating temperature ranges and typical applications for these parts?
Both the AD8604ARZ and AD8602DR-REEL7 are specified over the industrial temperature range of −40 °C to +125 °C. Typical applications include photodiode amplification, portable instrumentation, active filters, sensor signal conditioning, and audio or communications front ends where low offset, low bias current, and rail-to-rail swing are required.