Part A
AD8572ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2102 Stückzahl
- Package
- TSSOP-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
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
Parts at a glance
Part B
AD8570ARU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6068 Stückzahl
- Package
- TSSOP-20
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
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.