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 is a single-channel member of the same AD857x zero-drift operational amplifier family as the AD8574ARZ, sharing identical core amplifier specifications including supply voltage range, input offset voltage, and gain bandwidth. While the AD8574ARZ integrates four independent amplifiers in a 14-lead SOIC package and the AD8571ARZ provides a single amplifier in an 8-lead SOIC package, the two devices are functionally interchangeable in circuits requiring only one amplifier channel. Designers should verify channel count requirements and PCB footprint compatibility before substituting.
Amplifier Core Specifications
High match
Supply Voltage Range
High match
Channel Count
Not compatible
Package and Pinout
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 | AD8574ARZ | AD8571ARZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 1 (Single) | Determines how many independent op-amp channels are available in one package; a quad and a single are not directly interchangeable in a circuit layout. |
| Input Offset Voltage (Max) | 1 µV | 1 µV | Ultra-low offset is the defining feature of the zero-drift family; matching offset ensures comparable DC accuracy in precision signal chains. |
| Input Offset Voltage Drift (Max) | 0.005 µV/°C | 0.005 µV/°C | Low drift maintains precision over temperature; identical drift means both parts behave the same in thermally varying environments. |
| Gain Bandwidth Product | 1.5 MHz | 1.5 MHz | Sets the closed-loop bandwidth achievable; equal GBW means both parts support the same signal frequency range. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines compatibility with single-supply systems; identical range allows the same power rail design for either part. |
| Supply Current per Amplifier (Typ) | 0.75 mA | 0.75 mA | Affects power budget; equal per-amplifier current means power consumption scales only with channel count. |
| Input Bias Current (Typ) | 10 pA | 10 pA | Very low bias current suits high-impedance sources; matching values ensure equivalent error contribution from source impedance. |
| Common-Mode Rejection Ratio (Min) | 120 dB | 120 dB | High CMRR rejects common-mode noise; identical rejection performance preserves signal integrity in either implementation. |
| Package | 14-Lead SOIC | 8-Lead SOIC | Footprint and pin count differ, so PCB layout must be redesigned; the parts are not drop-in replacements for each other. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8571ARZ | AD8574ARZ |
|---|---|---|
| Part Status | Active | Active |
| 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 AD8574ARZ and AD8571ARZ?
The AD8574ARZ is a quad-channel zero-drift operational amplifier, while the AD8571ARZ is a single-channel zero-drift operational amplifier from the same AD857x family. Both share the same core amplifier architecture, supply voltage range (2.7 V to 5 V), and rail-to-rail input/output characteristics, but differ in channel count and package: the AD8574ARZ is offered in a 14-lead SOIC package, and the AD8571ARZ in an 8-lead SOIC package.
Are the AD8574ARZ and AD8571ARZ pin-compatible?
No. The AD8574ARZ uses a 14-lead SOIC package with four amplifiers, while the AD8571ARZ uses an 8-lead SOIC package with a single amplifier. The package footprints, pin counts, and pin functions differ, so they are not drop-in replacements for one another.
Do the AD8574ARZ and AD8571ARZ share the same electrical specifications per amplifier?
Yes. Both devices are members of the AD857x zero-drift amplifier family and share the same per-amplifier specifications, including low offset voltage, low offset voltage drift, rail-to-rail input and output swing, and a gain bandwidth product of approximately 1.5 MHz. The primary differences are channel count and package.
What supply voltage range do the AD8574ARZ and AD8571ARZ support?
Both the AD8574ARZ and AD8571ARZ operate from a single supply of 2.7 V to 5 V, and they can also be operated from dual supplies within the equivalent total range. Designers should confirm the exact limits against the respective manufacturer datasheets for the target operating conditions.
Which applications favor the AD8574ARZ versus the AD8571ARZ?
The AD8574ARZ is suited to multi-channel signal conditioning where four zero-drift amplifiers are needed in a compact 14-lead SOIC, such as multi-sensor interfaces. The AD8571ARZ is suited to single-channel precision applications where board space is limited and only one amplifier is required, using the smaller 8-lead SOIC package.
Can the AD8571ARZ be used to replace one channel of an AD8574ARZ in an existing design?
Functionally, a single AD8571ARZ amplifier can perform the same signal-conditioning role as one channel of the AD8574ARZ, since both share the same core specifications. However, the replacement is not a direct PCB drop-in because the package and pinout differ; the layout must be redesigned or adapted for the 8-lead SOIC footprint.
Are the AD8574ARZ and AD8571ARZ zero-drift amplifiers?
Yes. Both the AD8574ARZ and AD8571ARZ are zero-drift operational amplifiers that use auto-zeroing techniques to achieve very low offset voltage and offset voltage drift, making them suitable for precision DC and low-frequency applications. Specific offset and drift values should be verified from the manufacturer datasheets.