Part A
AD8571ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2035 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The AD8571ARZ and AD8574AR share the same zero-drift auto-zero amplifier core, supply voltage range, and SOIC package family, making them functionally related candidates. However, the AD8571ARZ is a single-channel device while the AD8574AR is a quad-channel device, so the replacement is only valid where channel count and board footprint are re-validated. Designers should confirm channel requirements, PCB layout, and thermal considerations before substituting.
Channel Count
Validation required
Amplifier Architecture
High match
Supply Voltage Range
High match
Package Type
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8571ARZ | AD8574AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 4 | Determines how many independent op-amp channels are available in the package, directly affecting circuit topology and channel count. |
| Package / Case | 8-Lead SOIC (SOIC-8) | 14-Lead SOIC (SOIC-14) | Footprint and pin count must match the PCB layout; different packages are not drop-in compatible. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the operating supply window; matching ranges allow use in the same low-voltage systems. |
| Input Offset Voltage (Max) | 1 µV | 1 µV | Ultra-low offset is the key precision characteristic; identical values preserve DC accuracy in signal chains. |
| Input Offset Voltage Drift (Max) | 0.005 µV/°C | 0.005 µV/°C | Drift determines offset stability over temperature; matching drift keeps precision performance consistent. |
| Gain Bandwidth Product | 1.5 MHz | 1.5 MHz | Sets the closed-loop bandwidth achievable; identical GBW means similar AC response and stability behavior. |
| Input Bias Current (Typ) | 10 pA | 10 pA | Low bias current minimizes errors in high-impedance circuits; matching values preserve input loading characteristics. |
| Supply Current per Amplifier (Typ) | 0.75 mA | 0.75 mA | Affects power budget; identical per-amplifier current keeps power consumption predictable when scaling channels. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Defines environmental limits for the application; matching ranges ensure equivalent ruggedness. |
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 | AD8571ARZ | AD8574AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Zero-Drift | Zero-Drift |
| Number of Circuits | 1 | 4 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.4V/µs | 0.4V/µs |
| Gain Bandwidth Product | 1.5 MHz | 1.5 MHz |
| Current - Input Bias | 10 pA | 1 nA |
| Voltage - Input Offset | 1 µV | 1 µV |
| Supply Current | 850µA | 850µA (x4 Channels) |
| Current - Output / Channel | 30 mA | 30 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 5.5 V | 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 AD8571ARZ and AD8574AR?
The AD8571ARZ is a single-channel zero-drift operational amplifier in an 8-lead SOIC package, while the AD8574AR is a quad-channel zero-drift operational amplifier in a 14-lead SOIC package. Both share the same core amplifier architecture and similar electrical performance per channel, but differ in channel count, package size, and pinout.
Are the AD8571ARZ and AD8574AR pin-compatible?
No. The AD8571ARZ uses an 8-lead SOIC package with a single amplifier pinout, while the AD8574AR uses a 14-lead SOIC package with a quad amplifier pinout. The package sizes, pin counts, and pin functions differ, so they are not directly interchangeable on the same PCB footprint.
Do the AD8571ARZ and AD8574AR have the same supply voltage range?
Yes. Both devices operate from a single supply of 2.7 V to 5.5 V, or from dual supplies of ±1.35 V to ±2.75 V, as specified in the Analog Devices AD8571/AD8572/AD8574 datasheet.
What is the input offset voltage performance of these amplifiers?
Both the AD8571ARZ and AD8574AR feature very low input offset voltage due to their zero-drift architecture. The datasheet specifies a maximum input offset voltage of 5 µV for both devices, with offset voltage drift typically 0.005 µV/°C.
Can the AD8574AR be used as a drop-in replacement for the AD8571ARZ in an existing design?
No. Because the AD8571ARZ is a single amplifier in an 8-lead SOIC and the AD8574AR is a quad amplifier in a 14-lead SOIC, the package footprint and pinout are different. A redesign of the PCB layout is required to substitute one for the other.
What are the typical applications for the AD8571ARZ and AD8574AR?
Both devices are suited for precision signal conditioning where low offset and low drift are critical, including temperature sensors, pressure sensors, medical instrumentation, and low-level signal amplification. The AD8571ARZ is used where a single amplifier channel is needed, while the AD8574AR suits multi-channel precision applications requiring four matched amplifiers in one package.
Do both devices share the same operating temperature range?
Yes. Both the AD8571ARZ and AD8574AR are specified for the industrial temperature range of −40°C to +125°C, per the Analog Devices datasheet.