Part A
AD8554ARZ
ADI公司
- Lifecycle
- Active
- Stock
- 5191 件
- Package
- SOIC-14
- Series
- 線性放大器-儀器、運算放大器、緩衝放大器
Replacement verdict
Compatible functional replacement candidate
The AD8554ARZ and AD8555ARZ are both zero-drift, rail-to-rail operational amplifiers from Analog Devices in the same SOIC-14 package, sharing core amplifier architecture and supply range. However, the AD8555ARZ integrates programmable gain and on-chip trimming features that the AD8554ARZ does not provide, so substitution is only viable where those programmable functions are not required by the application.
Package Type
High match
Supply Voltage Range
High match
Amplifier Configuration
Validation required
Programmable Gain Feature
Not compatible
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8554ARZ | AD8555ARZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (quad) | 1 (single, with programmable gain) | Determines how many independent signal channels can be processed in one package; a quad and a single amplifier are not directly interchangeable in multi-channel designs. |
| Input Offset Voltage (max) | 10 µV | 10 µV (digitally trimmable) | Ultra-low offset is critical for precision DC signal conditioning; both are zero-drift class, but the AD8555 offers digital trim capability. |
| Programmable Gain | No (fixed unity-gain stable) | Yes (digitally programmable, 70 to 1280) | The AD8555 integrates a digitally programmable gain stage, enabling software-configurable amplification that the fixed-gain AD8554 cannot provide. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Both operate over the same low-voltage single-supply range, allowing similar power-rail compatibility in portable and low-voltage systems. |
| Gain Bandwidth Product | 1.5 MHz | 2 MHz | Bandwidth affects the maximum signal frequency the amplifier can handle with acceptable gain; the AD8555 offers slightly higher bandwidth. |
| Input Bias Current (typ) | 50 pA | 50 pA | Very low input bias current minimizes errors in high-impedance sensor interfaces; both parts share this CMOS input characteristic. |
| Package | 14-lead SOIC | 8-lead SOIC | Different package footprints and pin counts mean the two parts are not drop-in replacements on an existing PCB layout. |
| Digital Interface | None | Yes (serial programming interface) | The AD8555 requires a digital interface for gain and offset programming, adding firmware and pin requirements absent in the AD8554. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical industrial temperature ratings ensure both parts suit the same harsh-environment applications. |
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 | AD8554ARZ | AD8555ARZ |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Series | - | DigiTrim® |
| Part Status | Active | Active |
| Amplifier Type | Zero-Drift | Zero-Drift |
| Number of Circuits | 4 | 1 |
| Slew Rate | 0.4V/µs | 1.2V/µs |
| Gain Bandwidth Product | 1.5 MHz | 2 MHz |
| Current - Input Bias | 10 pA | 16 nA |
| Voltage - Input Offset | 1 µV | 2 µV |
| Supply Current | 850µA (x4 Channels) | 2mA |
| Current - Output / Channel | 30 mA | 10 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 5 V | 5.5 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Output Type | Rail-to-Rail | - |
Frequently asked questions
What are the primary functional differences between the AD8554ARZ and AD8555ARZ?
The AD8554ARZ is a quad-channel zero-drift operational amplifier, while the AD8555ARZ is a single-channel digitally programmable sensor signal amplifier with a programmable gain instrumentation amplifier architecture. The AD8554ARZ provides four independent op-amps in a 14-lead SOIC package, whereas the AD8555ARZ integrates a programmable gain stage, output offset adjustment, and fault detection in an 8-lead SOIC package.
Are the AD8554ARZ and AD8555ARZ pin-compatible?
No. The AD8554ARZ is supplied in a 14-lead SOIC package, and the AD8555ARZ is supplied in an 8-lead SOIC package. The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements for each other.
Can the AD8555ARZ be used as a direct substitute for the AD8554ARZ in an existing quad op-amp circuit?
No. The AD8555ARZ is a single-channel programmable sensor amplifier, not a quad operational amplifier. Substitution would require redesign of the circuit topology, gain configuration, and PCB layout, and must be validated against the manufacturer datasheets for both devices.
What are the supply voltage ranges for the AD8554ARZ and AD8555ARZ?
Both devices are specified for operation from a single supply of 2.7 V to 5.5 V. Designers should confirm the exact test conditions and limits in the respective Analog Devices datasheets before finalizing the power supply design.
How do the input offset voltage and drift characteristics compare between the AD8554ARZ and AD8555ARZ?
Both parts belong to the Analog Devices zero-drift amplifier family and are specified with very low input offset voltage and offset voltage drift. For exact maximum limits and test conditions, refer to the AD8554 and AD8555 datasheets, as the specified values and conditions may differ between the two products.
What is the role of the programmable gain feature in the AD8555ARZ compared with the AD8554ARZ?
The AD8555ARZ includes a digitally programmable gain stage that allows the gain to be set electronically, which is intended for sensor signal conditioning applications. The AD8554ARZ does not include programmable gain; its four op-amps require external feedback networks to set gain.
Which device is more suitable for multi-channel signal conditioning, the AD8554ARZ or the AD8555ARZ?
The AD8554ARZ is more suitable for multi-channel signal conditioning because it integrates four independent zero-drift op-amps in one package. The AD8555ARZ is a single-channel programmable sensor amplifier and would require one device per channel.
Do the AD8554ARZ and AD8555ARZ share the same operating temperature range?
Both devices are offered in extended industrial temperature range versions. The specific temperature range and grade should be verified from the ordering information in the respective Analog Devices datasheets, as the suffix and grade designations determine the guaranteed temperature range.