Part A
AD8572ARUZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2102 個数
- Package
- TSSOP-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 AD8572ARUZ and AD8574ARU are both zero-drift, rail-to-rail operational amplifiers from the same Analog Devices family, sharing identical supply voltage range, input offset characteristics, and gain-bandwidth product. The primary distinction is channel count: the AD8572ARUZ is a dual-channel device while the AD8574ARU is a quad-channel device, and both are offered in the same TSSOP package style. For applications where board space and channel count are not constrained, the AD8574ARU can serve as a functional substitute for the AD8572ARU, though the designer must account for the additional active channels and verify pinout compatibility within the target layout.
Channel Count
Not compatible
Package Type
High match
Supply Voltage Range
High match
Input Offset Voltage
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 | AD8572ARUZ | AD8574ARU | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 4 | Determines how many independent op-amp channels are available in one package; a dual cannot directly replace a quad in circuits needing four channels. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Both parts operate over the same single-supply range, so power supply compatibility is preserved when substituting. |
| Input Offset Voltage (Max) | 5 µV | 5 µV | Ultra-low offset is the defining feature of the AD857x family; matching offset ensures DC accuracy is maintained in precision signal chains. |
| Input Offset Voltage Drift (Max) | 0.05 µV/°C | 0.05 µV/°C | Low drift keeps offset stable over temperature, critical for precision instrumentation and sensor interfaces. |
| Gain Bandwidth Product | 1.5 MHz | 1.5 MHz | Same bandwidth means AC response and closed-loop stability behavior are equivalent between the two parts. |
| Supply Current per Amplifier (Typ) | 0.75 mA | 0.75 mA | Identical per-amplifier quiescent current ensures power budget scales only with channel count, not device type. |
| Input Bias Current (Typ) | 10 pA | 10 pA | Very low bias current suits high-impedance sources; matching values preserve input loading characteristics. |
| Common-Mode Rejection Ratio (Min) | 120 dB | 120 dB | High CMRR rejects common-mode noise equally in both parts, maintaining precision in differential sensing applications. |
| Package | 14-Lead TSSOP | 14-Lead TSSOP | Both use the same 14-lead TSSOP footprint, but pinout differs between dual and quad devices, so board layout must be verified. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical industrial/extended temperature ratings ensure equivalent environmental robustness. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8572ARUZ | AD8574ARU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| 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 are the key differences between the AD8572ARUZ and the AD8574ARU?
The AD8572ARUZ is a dual (2-channel) zero-drift operational amplifier, while the AD8574ARU is a quad (4-channel) zero-drift operational amplifier. Both are members of the same AD857x family and share the same per-channel architecture, supply range, and TSSOP packaging, but differ in channel count and pinout.
Are the AD8572ARUZ and AD8574ARU pin-compatible?
No. The AD8572ARUZ is a dual op amp in a 14-lead TSSOP, and the AD8574ARU is a quad op amp in a 14-lead TSSOP. Although both use the same 14-lead TSSOP body, the pin assignments differ because the AD8574ARU requires four amplifier channels plus supply and nulling pins, so the two devices are not drop-in replacements for each other.
Do the AD8572ARUZ and AD8574ARU share the same supply voltage range?
Yes. Both devices operate from a single supply of 2.7 V to 5 V (or dual supplies of ±1.35 V to ±2.5 V), consistent with the AD857x family datasheet specifications.
What is the input offset voltage performance of these amplifiers?
Both the AD8572ARUZ and AD8574ARU are zero-drift amplifiers with very low input offset voltage, specified in the low-microvolt range, and extremely low offset voltage drift over temperature, making them suitable for precision DC and low-frequency signal conditioning.
Can the AD8574ARU be used where an AD8572ARUZ was designed in?
Not as a direct drop-in. The AD8574ARU provides four channels versus two on the AD8572ARUZ, and the pinouts differ. A replacement requires PCB layout changes and verification of the additional channel connections, supply decoupling, and nulling pins against the respective datasheets.
What package do the AD8572ARUZ and AD8574ARU use?
Both parts are offered in a 14-lead TSSOP (RU suffix) package. The AD8572ARUZ uses the 14-lead TSSOP for its dual configuration, and the AD8574ARU uses the 14-lead TSSOP for its quad configuration.
Are these amplifiers suitable for low-frequency precision applications?
Yes. Both the AD8572ARUZ and AD8574ARU are zero-drift, chopper-stabilized amplifiers intended for precision applications requiring low offset voltage, low offset drift, and low input bias current, such as sensor signal conditioning and low-frequency instrumentation.