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-R7 and ADR4525BRZ are functionally interchangeable voltage reference ICs sharing the same 2.5 V output, SOIC-8 package, and operating temperature range, with the B-grade offering tighter initial accuracy and lower temperature coefficient. The A-grade variant is a valid drop-in substitute where the tighter B-grade specifications are not mandatory, though designs requiring the B-grade's enhanced precision should validate performance against the relaxed tolerances.
Output Voltage
High match
Package Type
High match
Operating Temperature Range
High match
Initial Accuracy and Temperature Coefficient
Validation required
Parts at a glance
Part B
ADR4525ARZ-R7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6327 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-R7 | ADR4525BRZ | Why it matters |
|---|---|---|---|
| Initial Accuracy (Vout tolerance) | ±0.04% (max) | ±0.02% (max) | Tighter initial tolerance directly reduces output voltage error at room temperature, which is critical for precision ADC/DAC reference applications. |
| Temperature Coefficient | 2 ppm/°C (max) | 1 ppm/°C (max) | Lower tempco means less drift over the operating temperature range, improving accuracy in systems exposed to temperature variation. |
| Output Voltage | 2.5 V | 2.5 V | Both provide the same nominal reference voltage, so the target system voltage requirement is met by either part. |
| Output Current Capability | ±10 mA (source/sink) | ±10 mA (source/sink) | Identical drive capability ensures either part can supply the same load current to downstream circuitry. |
| Supply Voltage Range | 3.0 V to 15 V | 3.0 V to 15 V | Matching input supply range means the same power rail can be used without redesign. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Identical temperature range ensures both parts are suitable for the same environmental conditions. |
| Package / Mounting | 8-SOIC, surface mount | 8-SOIC, surface mount | Same package and footprint allow drop-in replacement on an existing PCB layout. |
| Output Noise (0.1 Hz to 10 Hz) | 1.25 µV p-p (typ) | 1.25 µV p-p (typ) | Low-frequency noise affects resolution in high-precision measurement systems; identical noise performance preserves signal integrity. |
| Long-Term Drift | 25 ppm/1000 hr (typ) | 25 ppm/1000 hr (typ) | Matching long-term stability ensures comparable accuracy retention over the product lifetime. |
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-R7 |
|---|---|---|
| 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 difference between the ADR4525ARZ-R7 and the ADR4525BRZ?
Both devices are 2.5 V high-precision voltage references in the same SOIC-8 package, but they differ in initial accuracy and temperature coefficient grade. The ADR4525A (ARZ-R7) is specified with an initial accuracy of ±0.04% and a temperature coefficient of 2 ppm/°C, while the ADR4525B (BRZ) is specified with an initial accuracy of ±0.02% and a temperature coefficient of 1 ppm/°C. The B grade therefore offers tighter initial tolerance and lower drift.
Are the ADR4525ARZ-R7 and ADR4525BRZ pin-compatible and package-compatible?
Yes. Both parts are offered in the same 8-lead SOIC package (RZ suffix) with identical pin functions, so they are drop-in compatible from a footprint and pinout perspective. The difference is limited to the accuracy and drift grade, not the package or pin assignment.
What is the output voltage and operating temperature range of these references?
Both the ADR4525ARZ-R7 and ADR4525BRZ provide a fixed 2.5 V output and are specified for operation over the extended industrial temperature range of −40°C to +125°C.
Can the ADR4525ARZ-R7 be used as a direct substitute for the ADR4525BRZ?
Electrically they are interchangeable in most circuits because both are 2.5 V references in the same package with the same pinout. However, substituting the A grade for the B grade reduces the guaranteed initial accuracy (from ±0.02% to ±0.04%) and increases the maximum temperature coefficient (from 1 ppm/°C to 2 ppm/°C). The substitution should only be made after confirming that the relaxed specifications still meet the system error budget.
What is the difference in the ordering suffix "-R7" on the ADR4525ARZ-R7?
The "-R7" suffix denotes the packaging and shipment format: it indicates tape-and-reel packaging with 7-inch reels. The ADR4525BRZ is the base part number without that reel suffix, so the difference between the two orderable part numbers includes both the accuracy grade (A vs. B) and the reel packaging option.
Do both parts share the same long-term stability and output current specifications?
Yes. Both grades are members of the same ADR4525 family and share the same long-term stability and output current capability specifications as documented in the manufacturer datasheet. The graded differences between the A and B versions are confined to initial accuracy and temperature coefficient.
Which grade should be selected for a precision data acquisition design?
For designs with a tight error budget, the ADR4525BRZ is the preferred choice because its ±0.02% initial accuracy and 1 ppm/°C temperature coefficient provide lower total reference error over temperature. The ADR4525ARZ-R7 remains suitable where the wider ±0.04% initial accuracy and 2 ppm/°C drift are acceptable and reel packaging is required.