Part A
AD8608ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3744 PCS
- Package
- TSSOP-14
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8608ARUZ and AD8602ARMZ-R2 are both quad-channel CMOS operational amplifiers from the same AD860x family, sharing identical core electrical characteristics including supply voltage range, input offset voltage, and unity-gain bandwidth. The primary distinction lies in package and pinout configuration, which requires layout validation before substitution. The AD8608ARUZ is a strong functional candidate for designs where board space and pinout can accommodate the TSSOP-14 footprint, while the AD8602ARMZ-R2 remains preferable where the MSOP-8 form factor is fixed.
Amplifier Channel Count
High match
Supply Voltage Range
High match
Package Type
Validation required
Pin Configuration
Validation required
Parts at a glance
Part B
AD8602ARMZ-R2
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3698 PCS
- Package
- TSSOP-8
- 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 | AD8608ARUZ | AD8602ARMZ-R2 | 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 TSSOP | 8-Lead MSOP | Different package footprints and pin counts require different PCB layouts, so they are not drop-in replacements. |
| Input Offset Voltage (max) | 65 µV | 65 µV | Low offset voltage is critical for precision DC signal accuracy; matching values indicate comparable precision performance. |
| Input Bias Current (typ) | 0.2 pA | 0.2 pA | Very low bias current suits high-impedance sensor interfaces; identical values mean similar input loading behavior. |
| Gain Bandwidth Product | 10 MHz | 8.4 MHz | GBW sets the achievable closed-loop bandwidth; the slight difference affects high-frequency signal handling. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Compatible supply range allows operation from the same single-supply rails in low-voltage systems. |
| Supply Current per Amplifier (typ) | 1.2 mA | 1.2 mA | Quiescent current affects power budget; matching per-amplifier current means similar efficiency per channel. |
| Input Voltage Noise Density | 8 nV/√Hz | 8 nV/√Hz | Noise density impacts signal-to-noise ratio in low-level applications; identical values indicate equivalent noise performance. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Matching industrial temperature ranges ensure both parts suit the same environmental conditions. |
Need help validating a replacement?
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8608ARUZ | AD8602ARMZ-R2 |
|---|---|---|
| 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 | 5V/µs | 6V/µs |
| Gain Bandwidth Product | 10 MHz | 8.4 MHz |
| Current - Input Bias | 1 pA | 0.2 pA |
| Voltage - Input Offset | 80 µV | 80 µV |
| Supply Current | 1mA (x4 Channels) | 750µA (x2 Channels) |
| Current - Output / Channel | 80 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 AD8608ARUZ and AD8602ARMZ-R2?
The AD8608ARUZ is a quad-channel, 10 MHz CMOS operational amplifier in a 14-lead TSSOP package, while the AD8602ARMZ-R2 is a dual-channel, 8 MHz CMOS operational amplifier in an 8-lead MSOP package. The AD8608 offers four amplifiers per package with a higher gain-bandwidth product, whereas the AD8602 provides two amplifiers in a smaller footprint. Both are rail-to-rail input/output, single-supply amplifiers from Analog Devices.
Are the AD8608ARUZ and AD8602ARMZ-R2 pin-compatible?
No. The AD8608ARUZ uses a 14-lead TSSOP package with four operational amplifiers, while the AD8602ARMZ-R2 uses an 8-lead MSOP package with two operational amplifiers. The pin counts, pin functions, and package footprints differ, so they are not drop-in replacements for each other.
What are the supply voltage ranges for these two amplifiers?
Both the AD8608ARUZ and AD8602ARMZ-R2 are specified for single-supply operation from 2.7 V to 5.5 V, and they also support dual-supply operation. This makes both devices suitable for low-voltage portable and battery-powered applications.
How do the gain-bandwidth products of the AD8608ARUZ and AD8602ARMZ-R2 compare?
The AD8608ARUZ has a gain-bandwidth product of 10 MHz, while the AD8602ARMZ-R2 has a gain-bandwidth product of 8 MHz. The AD8608 therefore provides wider closed-loop bandwidth for a given gain, which can be advantageous in higher-frequency signal conditioning applications.
Do both parts feature rail-to-rail input and output capability?
Yes. Both the AD8608ARUZ and AD8602ARMZ-R2 are rail-to-rail input and output (RRIO) CMOS operational amplifiers, allowing input and output signals to swing close to both supply rails. This is beneficial for maximizing dynamic range in low-voltage single-supply designs.
What are the typical input offset voltage specifications for these amplifiers?
Both the AD8608ARUZ and AD8602ARMZ-R2 are precision amplifiers with low input offset voltage, typically specified in the microvolt range per the Analog Devices datasheets. Designers should consult the respective datasheets for the exact offset voltage limits over temperature before finalizing precision designs.
Which part should be selected for a design requiring four amplifiers in a single package?
The AD8608ARUZ should be selected, as it integrates four operational amplifiers in a single 14-lead TSSOP package. The AD8602ARMZ-R2 contains only two amplifiers, so a four-amplifier design would require two AD8602 packages, consuming more board area and adding component count.
Are both devices suitable for low-power portable applications?
Yes. Both the AD8608ARUZ and AD8602ARMZ-R2 are CMOS operational amplifiers designed for low power consumption and operate from a 2.7 V to 5.5 V single supply, making them appropriate for portable and battery-powered systems. The AD8602ARMZ-R2, with only two amplifiers per package, may offer lower total quiescent current in designs that do not require four channels.