Part A
ADR4525BRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4547 Stückzahl
- Package
- SOIC-8
- Series
- PMIC Spannung Referenz
Replacement verdict
Compatible functional replacement candidate
The ADR4525ARZ and ADR4525BRZ are functionally interchangeable voltage reference ICs sharing the same 2.5 V output, series topology, SOIC-8 package, and pinout; the only meaningful distinction is the initial accuracy grade, where the B-grade offers a tighter tolerance than the A-grade. Designers can treat the B-grade as a drop-in upgrade for the A-grade in most applications, while substituting the A-grade for the B-grade requires confirming that the wider initial error remains acceptable for the target circuit.
Output Voltage
High match
Package Type
High match
Reference Topology
High match
Initial Accuracy Grade
Validation required
Parts at a glance
Part B
ADR4525ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4570 Stückzahl
- Package
- SOIC-8
- Series
- PMIC Spannung Referenz
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADR4525ARZ | ADR4525BRZ | Why it matters |
|---|---|---|---|
| Initial Accuracy (Vout) | ±0.04% (max) | ±0.02% (max) | Tighter initial tolerance reduces system calibration effort and directly affects absolute output accuracy at room temperature. |
| Temperature Coefficient | 2 ppm/°C (max) | 1 ppm/°C (max) | Lower tempco limits output drift over temperature, critical for precision instrumentation and high-resolution data converters. |
| Initial Accuracy Grade | A grade | B grade | The grade designation reflects the binning of accuracy and drift specifications, determining suitability for tighter-tolerance designs. |
| Output Voltage | 2.5 V | 2.5 V | Both provide the same nominal reference voltage, so the output voltage itself is not a differentiator for substitutability. |
| Output Current Capability | ±10 mA (source/sink) | ±10 mA (source/sink) | Identical drive capability means both can support the same load conditions in a given circuit. |
| Supply Voltage Range | 3.0 V to 15 V | 3.0 V to 15 V | Matching supply ranges ensure both parts are compatible with the same power rail in the application. |
| Operating Temperature Range | −40°C to +125°C | −40°C to +125°C | Identical temperature ratings confirm both parts suit the same environmental conditions. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Same package and pinout allow drop-in replacement without PCB layout changes. |
| Long-Term Drift | 25 ppm/1000 hr (typ) | 25 ppm/1000 hr (typ) | Equivalent long-term stability means both parts age similarly, affecting recalibration intervals equally. |
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 | ADR4525BRZ | ADR4525ARZ |
|---|---|---|
| Part Status | Active | Active |
| Reference Type | Series | Series |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 2.5V | 2.5V |
| Current - Output | 10 mA | 10 mA |
| Tolerance | ±0.02% | ±0.04% |
| Temperature Coefficient | 2ppm/°C | 4ppm/°C |
| Noise - 01 Hzto10 Hz | 1.25µVp-p | 1.25µVp-p |
| Voltage - Input | 3V ~ 15V | 3V ~ 15V |
| Supply Current | 950µA | 950µA |
| Operating Temperature | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the main difference between the ADR4525ARZ and ADR4525BRZ?
The primary difference is the initial accuracy grade. The ADR4525ARZ offers an initial output voltage accuracy of ±0.04% (max), while the ADR4525BRZ offers a tighter initial accuracy of ±0.02% (max). Both are 2.5 V voltage references in an 8-lead SOIC package.
Are the ADR4525ARZ and ADR4525BRZ pin-compatible and package-compatible?
Yes. Both devices are offered in the same 8-lead SOIC (R-8) package with identical pin functions, so they are pin-to-pin and footprint compatible.
What is the temperature coefficient difference between the A and B grades?
The ADR4525ARZ specifies a temperature coefficient of 2 ppm/°C (max), while the ADR4525BRZ specifies a tighter 1 ppm/°C (max) over the specified temperature range.
Do the ADR4525ARZ and ADR4525BRZ share the same output voltage and operating supply range?
Yes. Both provide a 2.5 V output and operate from a supply voltage of 3.0 V to 15 V, with the same low dropout and output current capability per the ADR4525 datasheet.
Can the ADR4525BRZ be used as a drop-in replacement for the ADR4525ARZ?
Yes, in most designs the ADR4525BRZ can replace the ADR4525ARZ because they are pin-compatible and share the same output voltage and package. The B grade provides tighter initial accuracy and temperature coefficient, so verify that the improved specifications do not affect any calibration assumptions in the target design.
Which grade should be selected for a precision data acquisition application?
For higher-precision applications, the ADR4525BRZ is generally preferred because its ±0.02% initial accuracy and 1 ppm/°C temperature coefficient provide tighter guaranteed limits than the ADR4525ARZ. Final selection should be based on the error budget and the verified datasheet specifications.
Do both devices share the same long-term drift and noise specifications?
Both grades are members of the ADR4525 family and share the same core design, but guaranteed limits such as initial accuracy and temperature coefficient differ by grade. Consult the ADR4525 datasheet for the specific long-term drift and noise limits applicable to each grade before finalizing a design.