Part A
ADA4571BRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4629 Stückzahl
- Package
- SOP-8
- Series
- Positionssensoren mit Winkel, Linear Positionsmessung
Replacement verdict
Not a drop-in replacement
The ADA4522-1ARZ and ADA4571BRZ are fundamentally different devices: the former is a zero-drift operational amplifier, while the latter is an AMR angle sensor with integrated signal conditioning. Their functions, output types, and application roles do not overlap, so neither part can substitute for the other in a given design.
Different device function
Different output type
Different package and pinout
Different application role
Parts at a glance
Part B
ADA4522-1ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5515 Stückzahl
- Package
- SOP-8
- 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 | ADA4522-1ARZ | ADA4571BRZ | Why it matters |
|---|---|---|---|
| Amplifier Type | Zero-drift operational amplifier (voltage feedback) | Anisotropic magnetoresistive (AMR) signal conditioning amplifier | The two parts serve fundamentally different functions; one is a general-purpose precision op amp and the other is a dedicated magnetic sensor signal conditioner, so they are not functionally interchangeable. |
| Number of Channels | 1 | 2 (differential AMR bridge channels) | Channel count determines how many independent signal paths can be processed, affecting circuit topology and board space. |
| Input Offset Voltage (max) | 5 µV | ±1 mV (typical, sensor-dependent) | Offset voltage directly limits DC accuracy; the zero-drift op amp offers far lower offset for precision measurement applications. |
| Input Voltage Noise Density | 5.8 nV/√Hz (typical) | Not specified as a standard op-amp noise metric (optimized for AMR bridge signals) | Noise density affects resolution of low-level signals; the ADA4522 is characterized for low-noise precision amplification while the ADA4571 is tailored to magnetic sensor conditioning. |
| Supply Voltage Range | 4.5 V to 55 V (single supply) | 2.7 V to 5.5 V (single supply) | Supply range determines compatibility with the system power rail; the ADA4522 supports high-voltage industrial rails while the ADA4571 is limited to low-voltage logic supplies. |
| Gain Bandwidth Product | 2.7 MHz (typical) | Not applicable (fixed-gain signal conditioning for AMR bridge) | GBW sets the achievable closed-loop bandwidth for general amplification; the ADA4571 is not a general-purpose op amp so GBW is not a meaningful substitution metric. |
| Operating Temperature Range | −40 °C to +125 °C | −40 °C to +125 °C | Both parts share the same industrial temperature range, so thermal environment is not a differentiator between them. |
| Package | 8-lead SOIC (R-8) | 8-lead SOIC (R-8) | Identical package footprint allows drop-in board placement, though electrical function still differs. |
| Primary Application | Precision instrumentation, current sensing, sensor signal conditioning | Magnetic angle/position sensing with AMR bridges | Application focus determines whether the part fits the intended circuit; these parts target different end uses and are not substitutes. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADA4571BRZ | ADA4522-1ARZ |
|---|---|---|
| Part Status | Active | Active |
| For Measuring | Angle | - |
| Technology | Hall Effect | - |
| Rotation Angle - Electrical Mechanical | 180° (±90°), Continuous | - |
| Output | Analog Voltage | - |
| Output Signal | Cosine, Sine | - |
| Actuator Type | External Magnet, Not Included | - |
| Voltage - Supply | 2.7V ~ 5.5V | - |
| Mounting Type | Surface Mount | Surface Mount |
| Termination Style | Gull Wing | - |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Amplifier Type | - | Zero-Drift |
| Number of Circuits | - | 1 |
| Output Type | - | Rail-to-Rail |
| Slew Rate | - | 1.7V/µs |
| Gain Bandwidth Product | - | 2.7 MHz |
| Current - Input Bias | - | 50 pA |
| Voltage - Input Offset | - | 1.5 µV |
| Supply Current | - | 830µA |
| Current - Output / Channel | - | 32 mA |
| Voltage - Supply Span(Min) | - | 4.5 V |
| Voltage - Supply Span(Max) | - | 55 V |
Frequently asked questions
Are the ADA4522-1ARZ and ADA4571BRZ functionally interchangeable?
No. The ADA4522-1ARZ is a zero-drift, low-noise operational amplifier, while the ADA4571BRZ is an anisotropic magnetoresistive (AMR) angle sensor with integrated signal conditioning. They serve entirely different functions and are not interchangeable.
What are the key differences in primary function between the ADA4522-1ARZ and ADA4571BRZ?
The ADA4522-1ARZ is a single-channel op amp designed for precision signal amplification with ultra-low offset voltage and drift. The ADA4571BRZ is a magnetic angle sensor that outputs analog sine and cosine signals proportional to the angle of an applied magnetic field.
Do the ADA4522-1ARZ and ADA4571BRZ share the same package and pinout?
Both devices are offered in an 8-lead SOIC package (R-8 suffix), but their pin functions differ completely. The ADA4522-1ARZ uses standard op amp pin assignments (IN+, IN−, V+, V−, OUT, etc.), while the ADA4571BRZ assigns pins to magnetic sensor outputs, supply, and gain-setting functions. They are not pin-compatible substitutes.
What supply voltage ranges do the ADA4522-1ARZ and ADA4571BRZ support?
The ADA4522-1ARZ operates from a wide dual supply of ±2.5 V to ±27.5 V (or 5 V to 55 V single supply). The ADA4571BRZ operates from a single supply of 2.7 V to 5.5 V. The supply requirements are not compatible.
Can the ADA4522-1ARZ be used to amplify signals from the ADA4571BRZ in a signal chain?
Yes, this is a valid use case. The ADA4571BRZ provides analog sine and cosine outputs that can be conditioned or amplified by a precision op amp such as the ADA4522-1ARZ, provided the supply rails and signal levels are properly interfaced. The ADA4522-1ARZ's low offset and low drift suit precision sensor signal conditioning.
What are the typical applications for each device?
The ADA4522-1ARZ is used in precision instrumentation, sensor signal conditioning, and low-noise amplification where offset drift must be minimized. The ADA4571BRZ is used for contactless angular position measurement, such as in motor commutation, rotary encoders, and automotive angle sensing.
Do both devices operate over the same temperature range?
Both the ADA4522-1ARZ and ADA4571BRZ are specified for the industrial temperature range of −40 °C to +125 °C, per their respective manufacturer datasheets.