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
Not a drop-in replacement
The AD8572ARUZ and AD8570ARU are not drop-in replacements for one another. Although both are zero-drift operational amplifiers from the same manufacturer family, they differ in channel count, package footprint, and supply voltage range, so the AD8570ARU cannot be substituted directly in a design laid out for the AD8572ARUZ without schematic and PCB changes.
Different channel count
Different package footprint
Different supply voltage range
Different quiescent current
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 | AD8570ARU | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (dual) | 1 (single) | Channel count determines whether the part can replace a dual or single op-amp in a given circuit layout. |
| Input Offset Voltage (max) | 5 µV | 250 µV | Lower offset voltage yields higher DC accuracy; a large difference affects precision applications. |
| Input Offset Voltage Drift (max) | 0.05 µV/°C | 1 µV/°C | Drift determines offset stability over temperature, critical for precision sensor signal chains. |
| Gain Bandwidth Product | 1.5 MHz | 1 MHz | GBW sets the achievable closed-loop bandwidth and small-signal speed of the amplifier. |
| Input Bias Current (typ) | 10 pA | 1 pA | Bias current affects error in high-impedance circuits; both are low but differ in magnitude. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Operating supply range must match the system rail to ensure proper function and compatibility. |
| Supply Current per Amplifier (typ) | 0.75 mA | 1.1 mA | Quiescent current impacts power budget, especially in battery-powered designs. |
| Package | 8-lead TSSOP | 8-lead TSSOP | Package footprint and pinout must match for board-level drop-in compatibility. |
| Rail-to-Rail Input/Output | Yes (RRIO) | Yes (RRIO) | RRIO capability allows full dynamic range use near supply rails, important for low-voltage systems. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8572ARUZ | AD8570ARU |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Zero-Drift | Buffer |
| Number of Circuits | 2 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.4V/µs | 6V/µs |
| Gain Bandwidth Product | 1.5 MHz | 6 MHz |
| -3 dB Bandwidth | - | 6 MHz |
| Current - Input Bias | 160 pA | 80 nA |
| Voltage - Input Offset | 1 µV | 2 mV |
| Supply Current | 850µA (x2 Channels) | 700µA (x2 Channels) |
| Current - Output / Channel | 30 mA | 35 mA |
| Voltage - Supply Span(Min) | 2.7 V | 4.5 V |
| Voltage - Supply Span(Max) | 5 V | 16 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8572ARUZ and the AD8570ARU?
The AD8572ARUZ is a dual zero-drift operational amplifier, while the AD8570ARU is a single zero-drift operational amplifier. The AD8572ARUZ provides two amplifiers in a 14-lead TSSOP package, whereas the AD8570ARU provides one amplifier in an 8-lead TSSOP package. Both share the Analog Devices zero-drift architecture but differ in channel count and package pinout.
Are the AD8572ARUZ and AD8570ARU pin-compatible?
No. The AD8572ARUZ is a 14-lead TSSOP dual amplifier, and the AD8570ARU is an 8-lead TSSOP single amplifier. The package sizes, pin counts, and pin functions differ, so they are not drop-in replacements for each other.
What is the supply voltage range for these devices?
Both the AD8572ARUZ and AD8570ARU 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, per Analog Devices datasheet specifications.
What is the input offset voltage performance of the AD8572ARUZ and AD8570ARU?
Both devices are zero-drift amplifiers featuring very low input offset voltage. The AD8572ARUZ specifies a maximum input offset voltage of 5 µV, and the AD8570ARU specifies a maximum input offset voltage of 5 µV, with offset drift typically 0.01 µV/°C, per Analog Devices datasheet data.
Can the AD8572ARUZ be used to replace two AD8570ARU devices in a design?
Functionally, the AD8572ARUZ integrates two zero-drift amplifiers in one package, so it can replace two AD8570ARU single amplifiers where board space and layout permit. However, the 14-lead TSSOP footprint differs from the 8-lead TSSOP footprint of the AD8570ARU, so the PCB layout must be redesigned accordingly.
What are the typical applications for the AD8572ARUZ and AD8570ARU?
Both zero-drift amplifiers are suited for precision sensor signal conditioning, low-level signal amplification, medical instrumentation, and thermocouple or bridge transducer interfaces where low offset voltage and low drift are required. The AD8572ARUZ dual version suits multi-channel precision systems, while the AD8570ARU single version suits space-constrained single-channel designs.
What is the operating temperature range for the AD8572ARUZ and AD8570ARU?
Both the AD8572ARUZ and AD8570ARU are specified for the industrial temperature range of −40 °C to +125 °C, per Analog Devices datasheet specifications.