Part A
ADR03ARZ
ADI公司
- Lifecycle
- Active
- Stock
- 6415 件
- Package
- SOIC-8
- Series
- PMIC-電壓參攷
Replacement verdict
Compatible functional replacement candidate
The ADR03BR is a higher-grade variant of the ADR03ARZ, sharing the same 2.5 V buried Zener architecture, SOIC-8 footprint, and pinout, while offering tighter initial accuracy and lower temperature drift. It is a viable functional replacement candidate where improved precision is acceptable, though the tighter grade should be validated against the application's error budget.
Output Voltage
High match
Package Type
High match
Initial Accuracy
Validation required
Temperature Coefficient
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADR03ARZ | ADR03BR | Why it matters |
|---|---|---|---|
| Initial Accuracy (Vout) | ±0.2% (2.498 V to 2.502 V) | ±0.1% (2.499 V to 2.501 V) | Tighter initial tolerance reduces system calibration effort and improves absolute output accuracy at power-up. |
| Temperature Coefficient | 10 ppm/°C max | 3 ppm/°C max | Lower tempco yields more stable reference voltage over temperature, critical for precision measurement and data acquisition. |
| Output Voltage | 2.5 V | 2.5 V | Both provide the same nominal reference, so the target system's full-scale range is unchanged. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Identical footprint allows drop-in board replacement without layout changes. |
| Supply Voltage Range | 4.5 V to 18 V | 4.5 V to 18 V | Same input range ensures compatibility with the existing power rail of the design. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Matching temperature ratings confirm both parts suit the same environmental conditions. |
| Output Current Capability | 10 mA source/sink | 10 mA source/sink | Equal drive capability means the same load and ADC reference input can be supported. |
| Supply Current | 1 mA max | 1 mA max | Same quiescent current keeps power budget unchanged in low-power designs. |
| Output Noise (0.1 Hz to 10 Hz) | 6 µV p-p typ | 6 µV p-p typ | Identical low-frequency noise preserves resolution in high-precision ADC applications. |
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 | ADR03ARZ | ADR03BR |
|---|---|---|
| Part Status | Active | Obsolete |
| Reference Type | Series | Series |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 2.5V | 2.5V |
| Current - Output | 10 mA | 10 mA |
| Tolerance | ±0.2% | ±0.1% |
| Temperature Coefficient | 10ppm/°C | 3ppm/°C |
| Noise - 01 Hzto10 Hz | 6µVp-p | 6µVp-p |
| Voltage - Input | 4.5V ~ 36V | 4.5V ~ 36V |
| Supply Current | 1mA | 1mA |
| 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 ADR03ARZ and ADR03BR?
The primary difference is the initial accuracy grade. The ADR03ARZ (A grade) specifies an initial output voltage error of ±0.1%, while the ADR03BR (B grade) specifies a tighter initial error of ±0.05%. Both are 2.5 V precision voltage references in an 8-lead SOIC package.
What is the output voltage and package of the ADR03ARZ and ADR03BR?
Both devices provide a fixed 2.5 V output and are offered in an 8-lead SOIC (R-8) package. They are pin-compatible with each other, differing only in specified accuracy grade.
How do the temperature coefficients of the ADR03ARZ and ADR03BR compare?
The ADR03ARZ (A grade) is specified with a temperature coefficient of 10 ppm/°C maximum, while the ADR03BR (B grade) is specified at 3 ppm/°C maximum, making the B grade more stable over temperature.
Can the ADR03ARZ be replaced by the ADR03BR in an existing design?
Yes, in most cases. Both are 2.5 V references in the same 8-lead SOIC package with identical pinout, and the ADR03BR offers tighter initial accuracy and lower temperature coefficient. The replacement should still be validated against the design's accuracy and drift requirements using the manufacturer datasheet.
What are the operating temperature ranges of the ADR03ARZ and ADR03BR?
Both the ADR03ARZ and ADR03BR are specified for the extended industrial temperature range of −40°C to +125°C.
What is the long-term stability specification for these references?
Both the ADR03ARZ and ADR03BR are specified with a long-term drift of 25 ppm typical per 1,000 hours at 25°C, per the Analog Devices datasheet.
Do the ADR03ARZ and ADR03BR differ in supply current or output current capability?
No. Both grades share the same electrical operating characteristics, including low supply current and output current capability, as they are the same core reference offered in different accuracy grades. Refer to the Analog Devices ADR03 datasheet for the exact supply current and output current limits.