Part A
AD8604ARUZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3528 PCS
- Package
- TSSOP-14
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8604ARUZ and AD8602ARMZ-R2 are both precision CMOS operational amplifiers from the same Analog Devices family, sharing identical supply voltage range, input offset voltage grade, and rail-to-rail I/O architecture. The primary functional distinction is channel count: the AD8604ARUZ is a quad device in a TSSOP-14 package, while the AD8602ARMZ-R2 is a dual device in an MSOP-8 package. For applications where board space and channel count can be re-allocated, the AD8602ARMZ-R2 is a viable functional substitute; however, the package footprint and channel configuration differ, so a layout revision is required before substitution.
Channel Count
Not compatible
Package Type
Not compatible
Supply Voltage Range
High match
Input Offset Voltage Grade
High match
Parts at a glance
Part B
AD8602ARMZ-R2
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3698 PCS
- Package
- TSSOP-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 | AD8604ARUZ | 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 cannot directly replace a dual in a board designed for two channels without layout changes. |
| Package / Mounting | 14-Lead TSSOP | 8-Lead MSOP | Different package footprints and pin counts prevent drop-in substitution on the same PCB pad layout. |
| 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 single-supply system without level shifting. |
| Gain Bandwidth Product | 8.4 MHz | 8.4 MHz | Identical bandwidth means AC signal handling and closed-loop response are equivalent, supporting functional substitutability. |
| Input Offset Voltage (Max) | 750 µV | 750 µV | Equal offset voltage specs mean DC accuracy and error budgets remain the same when swapping parts. |
| Input Bias Current | 1 pA (typ) | 1 pA (typ) | Very low, matched bias current is critical for high-impedance sensor interfaces and keeps leakage errors consistent. |
| Slew Rate | 5 V/µs | 5 V/µs | Identical slew rate preserves large-signal transient behavior and settling characteristics. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Matching temperature ratings ensure both parts meet the same environmental and reliability requirements. |
| Input Voltage Noise Density | 8 nV/√Hz (typ) | 8 nV/√Hz (typ) | Equal noise density keeps SNR performance consistent for low-level signal amplification. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8604ARUZ | 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 | 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 | 80 µV |
| 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 AD8604ARUZ and AD8602ARMZ-R2?
The AD8604ARUZ is a quad-channel operational amplifier in a 14-lead TSSOP package, while the AD8602ARMZ-R2 is a dual-channel operational amplifier in an 8-lead MSOP package. Both are rail-to-rail input/output CMOS amplifiers from Analog Devices with similar per-channel performance, but they differ in channel count, package footprint, and pin count.
Are the AD8604ARUZ and AD8602ARMZ-R2 pin-compatible?
No. The AD8604ARUZ uses a 14-lead TSSOP package for four channels, and the AD8602ARMZ-R2 uses an 8-lead MSOP package for two channels. The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements for each other.
Do the AD8604ARUZ and AD8602ARMZ-R2 share the same supply voltage range?
Yes. Both devices are specified for operation from 2.7 V to 5.5 V single supply (or equivalent dual supplies), consistent with the Analog Devices AD860x family datasheet.
What is the input offset voltage specification for these amplifiers?
Both the AD8604ARUZ and AD8602ARMZ-R2 are specified with a low input offset voltage in the microvolt range per the Analog Devices AD860x datasheet. Designers should consult the official datasheet for the exact grade-specific maximum limits before finalizing a design.
Can the AD8602ARMZ-R2 replace the AD8604ARUZ in an existing design?
Not directly. The AD8602ARMZ-R2 provides only two channels versus four on the AD8604ARUZ, and the package and pinout differ. A replacement requires a redesigned PCB layout and verification that two channels satisfy the circuit requirements.
Are both parts rail-to-rail input and output amplifiers?
Yes. Both the AD8604ARUZ and AD8602ARMZ-R2 are rail-to-rail input and output CMOS operational amplifiers, allowing signal swing close to both supply rails, as stated in the Analog Devices AD860x family documentation.
What are typical applications for the AD8604ARUZ versus the AD8602ARMZ-R2?
The AD8604ARUZ, with four channels in a 14-lead TSSOP, suits multi-channel signal conditioning, active filtering, and sensor interface designs where board space allows. The AD8602ARMZ-R2, with two channels in a small 8-lead MSOP, suits compact dual-channel amplification, portable instrumentation, and space-constrained analog front ends.