Part A
AD8597ARZ
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 6698 PCS
- Package
- SOIC-8
- Series
- 선형 증폭기 - 계측기, 연산 증폭기, 완충 증폭기
Replacement verdict
Not a drop-in replacement
The AD8597ARZ and AD8594AR are not drop-in replacements for each other. The AD8597ARZ is a single-channel ultralow-noise operational amplifier, while the AD8594AR is a quad-channel general-purpose operational amplifier. They differ in channel count, package footprint, noise performance, and supply current, so a direct board-level substitution is not possible without redesign.
Different channel count
Different package footprint
Different noise performance
Different supply current
Parts at a glance
Part B
AD8594AR
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 7427 PCS
- Package
- SOIC-16
- Series
- 선형 증폭기 - 계측기, 연산 증폭기, 완충 증폭기
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8597ARZ | AD8594AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 4 | Channel count determines how many independent signal paths can be handled in one package; a single vs quad device is not a drop-in substitute in multi-channel designs. |
| Input Voltage Noise Density | 1.1 nV/√Hz (typ) | 6 nV/√Hz (typ) | Lower noise density directly improves signal-to-noise ratio in low-level signal amplification; the AD8597 is significantly quieter. |
| Gain Bandwidth Product | 10 MHz (typ) | 3 MHz (typ) | GBW sets the achievable closed-loop bandwidth and small-signal speed; a lower GBW part may not meet high-frequency requirements. |
| Input Offset Voltage | 10 µV (max) | 500 µV (max) | Offset voltage affects DC accuracy; the much lower offset of the AD8597 is critical for precision, low-drift applications. |
| Supply Voltage Range | ±5 V to ±15 V (dual) | ±2.5 V to ±15 V (dual) | The allowable supply range determines compatibility with a given power rail; the AD8594 supports lower supply voltages than the AD8597. |
| Supply Current per Amplifier | ~5 mA (typ) | ~1.5 mA (typ) | Quiescent current impacts power budget and thermal load; the AD8594 is more power-efficient per amplifier. |
| Slew Rate | 16 V/µs (typ) | 2 V/µs (typ) | Slew rate limits large-signal transient response; the higher slew rate of the AD8597 supports faster, larger voltage swings. |
| Package | 8-Lead SOIC | 14-Lead SOIC | Package footprint and pin count must match the PCB layout; different packages are not physically interchangeable. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8597ARZ | AD8594AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 1 | 4 |
| Output Type | - | Rail-to-Rail |
| Slew Rate | 16V/µs | 5V/µs |
| Gain Bandwidth Product | 10 MHz | 3 MHz |
| Current - Input Bias | 25 nA | 5 pA |
| Voltage - Input Offset | 10 µV | 2 mV |
| Current - Output / Channel | 52 mA | 250 mA |
| Voltage - Supply Span(Min) | 9 V | 2.5 V |
| Voltage - Supply Span(Max) | 36 V | 6 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Supply Current | 5mA | - |
Frequently asked questions
What are the primary differences between the AD8597ARZ and AD8594AR?
The AD8597ARZ is a single ultra-low-noise, low-distortion operational amplifier, while the AD8594AR is a quad low-noise operational amplifier. The AD8597ARZ is offered in an 8-lead SOIC package, whereas the AD8594AR is offered in a 14-lead SOIC package. They differ in channel count, package pin count, and targeted application density.
Are the AD8597ARZ and AD8594AR pin-compatible?
No. The AD8597ARZ uses an 8-lead SOIC package for a single amplifier, and the AD8594AR uses a 14-lead SOIC package for a quad amplifier. The package sizes and pin counts differ, so they are not drop-in replacements for each other.
What is the input voltage noise density of each device?
The AD8597ARZ is specified with a typical input voltage noise density of 1.1 nV/√Hz at 1 kHz. The AD8594AR is specified with a typical input voltage noise density of 5 nV/√Hz at 1 kHz. The AD8597ARZ therefore offers lower voltage noise than the AD8594AR.
How do the supply voltage ranges compare?
Both the AD8597ARZ and AD8594AR operate from dual supplies of ±5 V to ±15 V, corresponding to a total supply range of 10 V to 30 V. They are specified for operation over the extended industrial temperature range of −40°C to +125°C.
Can the AD8597ARZ and AD8594AR be used in the same signal-chain applications?
They serve different roles. The AD8597ARZ is a single ultra-low-noise amplifier suited to low-level signal conditioning where minimum noise is critical. The AD8594AR is a quad low-noise amplifier suited to multi-channel signal conditioning where board space and channel count are priorities. Selection depends on channel count, noise budget, and package constraints.
What are the typical gain bandwidth and slew rate specifications?
The AD8597ARZ has a typical gain bandwidth product of 10 MHz and a typical slew rate of 5 V/µs. The AD8594AR has a typical gain bandwidth product of 5 MHz and a typical slew rate of 3 V/µs. These parameters should be verified against the latest manufacturer datasheets for the specific grade and package.
Do both devices support operation on a single supply?
Both the AD8597ARZ and AD8594AR are specified for dual-supply operation of ±5 V to ±15 V. Single-supply operation may be possible within the total supply range, but the input common-mode range and output swing must be validated against the manufacturer datasheet for the intended supply configuration.