Part A
AD8604ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3528 Stückzahl
- Package
- TSSOP-14
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD8606ARMZ-R2 is a viable functional replacement candidate for the AD8604ARUZ in many low-voltage, precision signal-conditioning applications, though the two parts differ in channel count, package footprint, and specified bandwidth. The AD8606 offers a higher gain-bandwidth product and faster slew rate, while the AD8604 provides four channels in a TSSOP-14 package versus two channels in an MSOP-8. Engineers should validate board layout, channel requirements, and AC performance before substituting.
Channel Count
Validation required
Package Type
Not compatible
Supply Voltage Range
High match
Gain Bandwidth Product
Validation required
Parts at a glance
Part B
AD8606ARMZ-R2
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7061 Stückzahl
- Package
- TSSOP-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
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 | AD8606ARMZ-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. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Matching supply ranges ensure both parts operate in the same system power rails without level shifting. |
| Gain Bandwidth Product | 8.8 MHz | 10 MHz | GBW sets the maximum usable signal frequency; similar values indicate comparable AC performance for filtering and buffering. |
| Input Offset Voltage (Max) | 65 µV | 65 µV | Low offset voltage is critical for precision DC signal conditioning; identical values mean comparable accuracy. |
| Input Bias Current | 1 pA (typ) | 1 pA (typ) | Very low bias current suits high-impedance sensor interfaces; matching values indicate equivalent input loading behavior. |
| Quiescent Current per Amplifier | 1.2 mA (typ) | 1.2 mA (typ) | Supply current affects power budget; equal per-amplifier current means similar efficiency in low-power designs. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings confirm both parts suit the same industrial and automotive environments. |
| Rail-to-Rail Input/Output | Yes | Yes | RRIO capability maximizes dynamic range on low supply voltages; both share this feature for single-supply designs. |
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 | AD8604ARUZ | AD8606ARMZ-R2 |
|---|---|---|
| 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 AD8604ARUZ and AD8606ARMZ-R2?
The AD8604ARUZ is a quad-channel operational amplifier supplied in a 14-lead TSSOP package, while the AD8606ARMZ-R2 is a dual-channel operational amplifier supplied in an 8-lead MSOP package. Both are precision, low-noise, rail-to-rail input/output CMOS amplifiers from Analog Devices, but they differ in channel count, package footprint, and pin configuration.
Can the AD8604ARUZ be used as a direct replacement for the AD8606ARMZ-R2?
No. The AD8604ARUZ is a quad amplifier in a 14-lead TSSOP package, whereas the AD8606ARMZ-R2 is a dual amplifier in an 8-lead MSOP package. The channel count, package dimensions, and pinout differ, so a direct drop-in substitution is not possible without PCB redesign and validation against the datasheets.
Do the AD8604ARUZ and AD8606ARMZ-R2 share the same supply voltage range?
Both devices are specified for single-supply operation from 2.7 V to 5.5 V, and both support dual-supply operation within the corresponding total supply range, per the Analog Devices datasheets. Designers should still confirm the exact limits and conditions in the respective datasheets for their application.
Are the AD8604ARUZ and AD8606ARMZ-R2 both rail-to-rail input and output amplifiers?
Yes. Both the AD8604 and AD8606 are rail-to-rail input and output CMOS operational amplifiers, allowing signal swing close to both supply rails. This makes them suitable for low-voltage, single-supply signal conditioning applications.
How do the package options affect PCB layout when choosing between these two parts?
The AD8604ARUZ uses a 14-lead TSSOP body, while the AD8606ARMZ-R2 uses an 8-lead MSOP body. The land patterns, pin counts, and pin assignments differ, so the PCB footprint must be designed for the specific package. The AD8606ARMZ-R2 occupies less board area due to its smaller package and lower channel count.
Are the AD8604ARUZ and AD8606ARMZ-R2 suitable for low-noise precision signal chains?
Yes. Both the AD8604 and AD8606 are marketed by Analog Devices as precision, low-noise CMOS amplifiers intended for applications such as sensor signal conditioning, active filtering, and audio. Designers should verify noise density, offset voltage, and bandwidth specifications in the respective datasheets against their requirements.
What should be verified before selecting between the AD8604ARUZ and AD8606ARMZ-R2 for a design?
Verify channel count (quad vs dual), package and pinout, supply voltage range, input/output swing, offset voltage, noise density, gain bandwidth, and operating temperature range against the official Analog Devices datasheets. Also confirm availability and lifecycle status through authorized distributors such as DigiKey, Mouser, or TTI before finalizing the design.