Part A
AD8572ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5978 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 AD8574ARZ and AD8572ARZ share the same zero-drift amplifier core, supply range, and SOIC package family, so the AD8572ARZ can serve as a functional substitute for the AD8574ARZ where two channels are sufficient. The primary distinction is channel count, which requires validation against the target circuit's channel requirements before substitution.
Amplifier Core Architecture
High match
Supply Voltage Range
High match
Channel Count
Validation required
Package Type
High match
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 | AD8572ARZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 2 (Dual) | Determines how many independent op-amp channels are available in a single package, directly affecting circuit density and channel count. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the operating supply window; identical ranges mean both parts are interchangeable for the same power rail design. |
| Input Offset Voltage (Max) | 1 µV | 1 µV | Ultra-low offset is critical for precision DC applications; matching values confirm equivalent accuracy performance. |
| Input Bias Current | 50 pA (typ) | 50 pA (typ) | Low bias current minimizes errors in high-impedance sensor and precision circuits; identical values support substitutability. |
| Gain Bandwidth Product | 1.5 MHz | 1.5 MHz | Sets the frequency range over which the amplifier provides useful gain; matching GBW ensures equivalent AC performance. |
| Supply Current per Amplifier | ~1 mA | ~1 mA | Affects total power budget; equal per-amplifier current means power scales only with channel count. |
| Input Voltage Noise Density | 22 nV/√Hz | 22 nV/√Hz | Determines noise floor in signal chains; identical noise density supports equivalent low-noise performance. |
| Package Type | 14-Lead SOIC | 8-Lead SOIC | Different pin counts and footprints mean the PCB layout must be redesigned; they are not drop-in replacements. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Confirms both parts are rated for the same environmental conditions, supporting use in industrial 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 | AD8572ARZ | AD8574ARZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Zero-Drift | Zero-Drift |
| Number of Circuits | 2 | 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 | 160 pA | 1 nA |
| Voltage - Input Offset | 1 µV | 1 µV |
| Supply Current | 850µA (x2 Channels) | 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 V | 5 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the primary difference between the AD8574ARZ and AD8572ARZ?
The AD8574ARZ is a quad (four-channel) zero-drift operational amplifier, while the AD8572ARZ is a dual (two-channel) zero-drift operational amplifier. Both are members of the same AD857x family and share the same per-amplifier core specifications, but they differ in channel count and package pinout.
Are the AD8574ARZ and AD8572ARZ pin-compatible?
No. The AD8574ARZ is supplied in a 14-lead SOIC package (quad), and the AD8572ARZ is supplied in an 8-lead SOIC package (dual). The package body size and pin count differ, so they are not drop-in replacements for one another on the same PCB footprint.
Do the AD8574ARZ and AD8572ARZ share the same electrical specifications per amplifier?
Yes. Both devices are zero-drift, rail-to-rail input/output operational amplifiers with essentially identical per-amplifier performance, including low offset voltage, low offset voltage drift, and low input bias current. The channel count and package are the primary differentiators.
What supply voltage range do the AD8574ARZ and AD8572ARZ support?
Both devices operate from a single supply of 2.7 V to 5 V, or from dual supplies of ±1.35 V to ±2.5 V, making them suitable for low-voltage precision signal-conditioning applications.
What are the AD8574ARZ and AD8572ARZ typically used for?
Both are intended for precision, low-drift applications such as sensor signal conditioning, thermocouple and bridge amplification, medical instrumentation, and low-offset DC amplification where zero-drift performance is required. The quad AD8574ARZ suits higher channel-count designs, while the dual AD8572ARZ suits compact two-channel designs.
Can the AD8572ARZ be used as a substitute for the AD8574ARZ in an existing design?
Not directly. Because the AD8574ARZ is a 14-lead quad device and the AD8572ARZ is an 8-lead dual device, substituting one for the other requires a PCB redesign to accommodate the different package, pinout, and channel count. Electrical per-amplifier performance is comparable, but the physical and channel-count differences prevent a direct swap.
What package types are the AD8574ARZ and AD8572ARZ available in?
Both are offered in SOIC packages: the AD8574ARZ in a 14-lead SOIC and the AD8572ARZ in an 8-lead SOIC. The "ARZ" suffix denotes the SOIC package and the RoHS-compliant industrial temperature grade.