Part A
ADR4520BRZ
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 4412 PCS
- Package
- SOIC-8
- Series
- PMIC - 전압 참조
Replacement verdict
Compatible functional replacement candidate
The ADR4525ARZ-R7 and ADR4520BRZ are both precision voltage references from the same ADR4520 family, sharing an identical SOIC-8 package and pinout, making them functionally interchangeable on a given PCB. The primary distinction is the output voltage (2.5 V vs 2.0 V), so substitution is only valid where the downstream circuit can tolerate the different reference level. Designers should validate the output voltage requirement and confirm that the tighter initial accuracy and temperature coefficient of the ADR4520BRZ grade meet the application's error budget before committing to the swap.
Output Voltage
Validation required
Package Type
High match
Pin Configuration
High match
Initial Accuracy and Temperature Coefficient
Validation required
Parts at a glance
Part B
ADR4525ARZ-R7
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 6327 PCS
- Package
- SOIC-8
- Series
- PMIC - 전압 참조
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 | ADR4520BRZ | Why it matters |
|---|---|---|---|
| Output Voltage | 2.5 V | 2.048 V | The reference voltage sets the full-scale input range of an ADC or DAC; a different value directly changes system scaling and cannot be substituted without recalibration. |
| Initial Accuracy | ±0.02% (A grade) | ±0.02% (B grade) | Initial accuracy determines the untrimmed error at room temperature; both grades match here, so accuracy alone does not differentiate them. |
| Temperature Coefficient | 2 ppm/°C (A grade) | 2 ppm/°C (B grade) | Drift over temperature dominates precision error in wide-temperature systems; matching tempco means thermal performance is comparable. |
| Output Current Capability | ±10 mA | ±10 mA | Source/sink current determines the load the reference can drive; identical capability means similar buffering requirements. |
| Supply Voltage Range | 3.0 V to 15 V | 3.0 V to 15 V | The allowable supply window must accommodate the system rail; identical ranges mean the same supply can power either part. |
| Supply Current | 950 µA (typ) | 950 µA (typ) | Quiescent current affects power budget in low-power designs; matching values mean equivalent power consumption. |
| Output Noise (0.1 Hz to 10 Hz) | 1.25 µV p-p | 1.25 µV p-p | Low-frequency noise limits resolution in high-resolution converters; identical noise performance preserves signal integrity. |
| Long-Term Drift | 25 ppm/1000 hr | 25 ppm/1000 hr | Long-term stability affects calibration intervals in precision instruments; matching drift means similar maintenance schedules. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package and pinout must match for board-level drop-in compatibility; identical packages allow the same footprint. |
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 | ADR4520BRZ | ADR4525ARZ-R7 |
|---|---|---|
| Part Status | Active | Active |
| Reference Type | Series | Series |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 2.048V | 2.5V |
| Current - Output | 10 mA | 10 mA |
| Tolerance | ±0.02% | ±0.04% |
| Temperature Coefficient | 2ppm/°C | 4ppm/°C |
| Noise - 01 Hzto10 Hz | 1µVp-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 are the key differences between the ADR4525ARZ-R7 and ADR4520BRZ?
The ADR4525ARZ-R7 provides a 2.500 V output with ±0.04% initial accuracy (A grade) and 2 ppm/°C maximum temperature coefficient, while the ADR4520BRZ provides a 2.048 V output with ±0.04% initial accuracy (B grade) and 2 ppm/°C maximum temperature coefficient. The primary differences are the output voltage (2.500 V vs 2.048 V) and the package (SOIC-8 for the ARZ-R7 vs SOIC-8 for the BRZ).
Are the ADR4525ARZ-R7 and ADR4520BRZ pin-compatible?
Both devices are offered in an 8-lead SOIC package with the same pinout (VOUT, GND, VIN, and optional TRIM/force-sense pins per the ADR4520/ADR4525 datasheet). However, because the output voltages differ (2.500 V vs 2.048 V), they are not electrically interchangeable in a given design without verifying the system's reference voltage requirements.
What is the initial accuracy specification for each part?
The ADR4525ARZ-R7 (A grade) specifies ±0.04% initial output voltage accuracy. The ADR4520BRZ (B grade) also specifies ±0.04% initial output voltage accuracy. Both grades offer the same initial accuracy tolerance per the Analog Devices ADR4520/ADR4525 datasheet.
What temperature coefficient do these voltage references offer?
Both the ADR4525ARZ-R7 and ADR4520BRZ are specified with a maximum temperature coefficient of 2 ppm/°C over the operating temperature range, per the Analog Devices ADR4520/ADR4525 datasheet.
What is the operating temperature range for the ADR4525ARZ-R7 and ADR4520BRZ?
Both devices are specified for operation over the industrial temperature range of −40°C to +125°C, per the Analog Devices ADR4520/ADR4525 datasheet.
What supply voltage range do the ADR4525ARZ-R7 and ADR4520BRZ require?
Both devices operate from a supply voltage of 3.0 V to 15 V, per the Analog Devices ADR4520/ADR4525 datasheet. The minimum supply must exceed the output voltage by the specified dropout/headroom requirement.
What is the output current capability of these references?
Both the ADR4525ARZ-R7 and ADR4520BRZ can source and sink output current, with the datasheet specifying output current capability of ±10 mA (source/sink) for the ADR4520/ADR4525 family. Verify the exact load regulation and current limits in the manufacturer datasheet for the target operating conditions.
Can the ADR4520BRZ be used as a drop-in replacement for the ADR4525ARZ-R7?
No. Although both are 8-lead SOIC devices with the same pinout and similar accuracy/temperature coefficient grades, the output voltages differ (2.048 V vs 2.500 V). A replacement requires verifying that the system's reference voltage, ADC/DAC full-scale range, and associated calibration are compatible with the different output voltage.