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 AD8604DRU are functionally compatible quad operational amplifiers from the same AD8604 family, sharing identical channel count, supply voltage range, and unity-gain bandwidth. The primary distinction lies in package and grade designation, with the AD8604ARUZ specified in a TSSOP-14 package and the AD8604DRU in a SOIC-14 package. Designers should verify PCB footprint compatibility and confirm that the grade-specific specifications of each variant meet the target application's requirements before substituting one for the other.
Channel Count
High match
Supply Voltage Range
High match
Package Type
Validation required
Grade Specification
Validation required
Parts at a glance
Part B
AD8604DRU
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 7292 PCS
- Package
- TSSOP-14
- 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 | AD8604DRU | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 | 4 | Both are quad op-amps, so channel count matches for multi-channel signal conditioning designs. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Identical single-supply operating range ensures the parts are interchangeable in low-voltage systems. |
| Input Offset Voltage (max) | 750 µV | 750 µV | Matching offset voltage limits preserve DC accuracy when substituting one part for the other. |
| Gain Bandwidth Product | 8.4 MHz | 8.4 MHz | Same bandwidth means AC performance and stability behavior remain consistent across the swap. |
| Input Bias Current (typ) | 0.2 pA | 0.2 pA | Ultra-low CMOS input bias current supports high-impedance sensor interfaces identically for both parts. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Same industrial/extended temperature rating allows use in identical environmental conditions. |
| Package / Mounting | 14-TSSOP, Surface Mount | 14-TSSOP, Surface Mount | Identical package and footprint enable drop-in board replacement without layout changes. |
| Output Current per Channel | 50 mA | 50 mA | Equal output drive capability ensures the same load-driving performance in either configuration. |
| Supply Current per Amplifier (typ) | 1.2 mA | 1.2 mA | Matching quiescent current keeps power budget unchanged when substituting parts. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8604ARUZ | AD8604DRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | DigiTrim® | DigiTrim® |
| Part Status | Active | Obsolete |
| Amplifier Type | CMOS | CMOS |
| Number of Circuits | 4 | 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 | 80 µV | 1.3 mV |
| Supply Current | 750µA (x4 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 AD8604ARUZ and the AD8604DRU?
The AD8604ARUZ and AD8604DRU are both quad, rail-to-rail, CMOS operational amplifiers from Analog Devices in a 14-lead TSSOP package. The primary difference is the grade and packaging designation: the AD8604ARUZ is the standard A-grade version supplied in a tube, while the AD8604DRU is the D-grade version. The A-grade offers tighter offset voltage specifications than the D-grade, so the two should not be treated as identical without checking the datasheet limits for the target design.
Are the AD8604ARUZ and AD8604DRU pin-compatible?
Yes. Both devices are offered in the same 14-lead TSSOP (RU) package, so they share the same pinout and footprint. This allows board-level interchangeability, but the electrical grade differences must still be validated against the circuit requirements.
What is the difference between the A-grade and D-grade specifications?
The A-grade (AD8604ARUZ) is specified with tighter input offset voltage limits than the D-grade (AD8604DRU). Designers should consult the Analog Devices AD8604 datasheet for the exact offset voltage, drift, and related limits applicable to each grade before substituting one for the other in precision applications.
Do both parts share the same supply voltage and bandwidth ratings?
Yes. Both the AD8604ARUZ and AD8604DRU belong to the same AD8604 family and share the same core specifications, including single-supply operation from 2.7 V to 5.5 V and a unity-gain bandwidth of approximately 8 MHz. The grade designation affects precision parameters rather than the fundamental supply and bandwidth ratings.
Can the AD8604DRU be used as a drop-in replacement for the AD8604ARUZ?
Because both are the same quad op amp in the same 14-lead TSSOP package, the AD8604DRU can be used in place of the AD8604ARUZ only if the wider offset voltage tolerance of the D-grade is acceptable for the application. For precision circuits, verify the D-grade limits against the design requirements using the manufacturer datasheet.
What are the input and output characteristics of these amplifiers?
Both the AD8604ARUZ and AD8604DRU are rail-to-rail input and output CMOS operational amplifiers, allowing signal swing close to both supply rails. They are suited to low-voltage, single-supply signal conditioning where near-rail operation is required.
How should the packaging difference between the two part numbers be interpreted?
The suffix "Z" in AD8604ARUZ indicates lead-free (RoHS-compliant) packaging per Analog Devices nomenclature, while the AD8604DRU designation reflects the D-grade device. Both are supplied in the 14-lead TSSOP package; buyers should confirm the exact ordering code and packaging format with the distributor or manufacturer before production release.