Part A
AD8602DRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6122 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8604ARZ and AD8602DRZ are both precision CMOS operational amplifiers from the same Analog Devices family, sharing identical supply voltage range, input offset voltage grade, and unity-gain bandwidth characteristics. The primary distinction is channel count and package footprint, so the AD8604ARZ can serve as a functional substitute for the AD8602DRZ where a quad-channel device in a wider SOIC package is acceptable, but it is not a pin-for-pin drop-in replacement.
Channel Count
Validation required
Package Type
Validation required
Supply Voltage Range
High match
Input Offset Voltage
High match
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 | AD8602DRZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 2 (Dual) | Determines how many independent op-amp channels are available in a single package; a quad cannot directly replace a dual in circuits requiring four channels, and vice versa. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the operating supply window; matching ranges ensure the part works in the same single-supply or battery-powered systems. |
| Gain Bandwidth Product | 8.4 MHz | 8.4 MHz | Sets the achievable closed-loop bandwidth and AC performance; identical GBW means similar frequency response and stability behavior. |
| Input Offset Voltage (max) | 750 µV | 750 µV | Affects DC accuracy in precision signal chains; matching offset specs means comparable error budget for the application. |
| Input Bias Current (typ) | 0.2 pA | 0.2 pA | Very low CMOS input bias current is critical for high-impedance sensor and photodiode interfaces; identical values preserve input loading behavior. |
| Supply Current per Amplifier (typ) | 1.2 mA | 1.2 mA | Governs power consumption; equal per-amplifier current keeps battery life and thermal budgets consistent when channel count is adjusted. |
| Slew Rate | 5 V/µs | 5 V/µs | Determines large-signal transient response and full-power bandwidth; matching slew rates preserve dynamic performance. |
| Package | 14-Lead SOIC | 8-Lead SOIC | Footprint and pin count differ, so PCB layout and pinout are not drop-in compatible between the two parts. |
| Input Voltage Noise Density | 8 nV/√Hz | 8 nV/√Hz | Sets the noise floor for low-level signal amplification; identical noise density ensures comparable SNR in sensitive applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8602DRZ | AD8604ARZ |
|---|---|---|
| Series | DigiTrim® | DigiTrim® |
| Part Status | Active | Active |
| Amplifier Type | CMOS | CMOS |
| Number of Circuits | 2 | 4 |
| 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 | 1.3 mV | 80 µV |
| Supply Current | 750µA (x2 Channels) | 750µA (x4 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 AD8602DRZ?
The AD8604ARZ is a quad (four-channel) operational amplifier in a 14-lead SOIC package, while the AD8602DRZ is a dual (two-channel) op amp in an 8-lead SOIC package. Both are single-supply, rail-to-rail input/output CMOS amplifiers from Analog Devices with similar per-channel AC and DC performance, but they differ in channel count, package size, and pinout.
Are the AD8604ARZ and AD8602DRZ electrically identical on a per-channel basis?
Yes. Both devices share the same core amplifier design and are specified with comparable per-channel parameters, including a typical gain bandwidth of 8.4 MHz, a typical slew rate of 5 V/µs, and low offset voltage. The primary distinction is the number of integrated channels and the package footprint, not the per-channel signal characteristics.
Can the AD8602DRZ be used as a drop-in replacement for the AD8604ARZ?
No. The AD8602DRZ is a dual device in an 8-lead SOIC package, whereas the AD8604ARZ is a quad device in a 14-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 an appropriate adapter.
What supply voltage range do the AD8604ARZ and AD8602DRZ support?
Both devices are specified for single-supply operation from 2.7 V to 5.5 V, and they can also operate from dual supplies within that total range. This makes them suitable for low-voltage, battery-powered, and portable signal-conditioning applications.
Do the AD8604ARZ and AD8602DRZ have rail-to-rail input and output capability?
Yes. Both the AD8604ARZ and AD8602DRZ feature rail-to-rail input and output (RRIO) stages, allowing signal swing close to both supply rails. This is beneficial for maximizing dynamic range in low-voltage single-supply designs.
What are the typical offset voltage and input bias current specifications for these amplifiers?
Both the AD8604ARZ and AD8602DRZ are specified with low offset voltage (typically in the tens of microvolts) and very low input bias current (typically in the picoamp range) due to their CMOS input stage. These characteristics suit precision, high-impedance sensor interfaces. Refer to the respective Analog Devices datasheets for the exact guaranteed limits over temperature.
Which package types are available for the AD8604ARZ and AD8602DRZ?
The AD8604ARZ is supplied in a 14-lead SOIC (R-14) package, and the AD8602DRZ is supplied in an 8-lead SOIC (R-8) package. The "Z" suffix in both part numbers indicates RoHS-compliant lead-free construction per Analog Devices ordering conventions.
Are the AD8604ARZ and AD8602DRZ suitable for the same applications?
Both are suited to precision low-voltage signal conditioning, sensor amplification, active filtering, and portable instrumentation. The AD8602DRZ (dual) is typically chosen where board space is limited and two channels suffice, while the AD8604ARZ (quad) is used when four channels are needed in a single package to reduce component count and board area.