Part A
ADR4525ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4570 個数
- Package
- SOIC-8
- Series
- PMIC - 電圧リファレンス
Replacement verdict
Compatible functional replacement candidate
The ADR4525ARZ and ADR4530BRZ share the same series architecture, package, and pinout, differing primarily in output voltage and initial accuracy grade. The ADR4530BRZ offers a higher output voltage with tighter initial accuracy, making it a viable functional substitute only where the 3.0 V reference is acceptable and the circuit can tolerate the voltage change; designers must validate the output voltage shift and accuracy grade against their specific application requirements before substitution.
Output Voltage
Validation required
Package Type
High match
Pin Configuration
High match
Initial Accuracy Grade
Validation required
Parts at a glance
Part B
ADR4530BRZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2957 個数
- Package
- SOIC-8
- Series
- PMIC - 電圧リファレンス
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 | ADR4530BRZ | Why it matters |
|---|---|---|---|
| Output Voltage | 2.5 V | 3.0 V | The nominal reference voltage directly sets the full-scale input range of an ADC or DAC; a different value changes the system's measurement span and cannot be substituted without recalibration. |
| Initial Accuracy | ±0.02% (A grade) | ±0.02% (B grade) | Initial accuracy determines the absolute error of the reference at room temperature; both grades offer the same tight tolerance, so accuracy alone does not differentiate them. |
| Temperature Coefficient | 2 ppm/°C (A grade) | 2 ppm/°C (B grade) | Drift over temperature affects precision across the operating range; matching tempco values indicate comparable stability performance. |
| Output Current Capability | ±10 mA | ±10 mA | Source/sink current capability determines the load the reference can drive; identical ratings mean similar drive strength for external circuitry. |
| Supply Voltage Range | 3.0 V to 15 V | 3.3 V to 15 V | The minimum supply headroom differs because the 3.0 V output requires a higher supply; this affects compatibility with low-voltage rails in the system. |
| Output Noise (0.1 Hz to 10 Hz) | 1.25 µV p-p | 1.5 µV p-p | Low-frequency noise limits resolution in precision DC measurements; slightly higher noise on the 3.0 V part may affect low-noise designs. |
| Long-Term Drift | 25 ppm/1000 hr | 25 ppm/1000 hr | Long-term stability affects calibration intervals; identical drift figures indicate comparable aging behavior. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package and pinout compatibility enables drop-in replacement on an existing PCB layout. |
| Operating Temperature Range | −40 °C to +125 °C | −40 °C to +125 °C | Matching industrial temperature ranges ensure both parts suit the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADR4525ARZ | ADR4530BRZ |
|---|---|---|
| Part Status | Active | Active |
| Reference Type | Series | Series |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 2.5V | 3V |
| Current - Output | 10 mA | 10 mA |
| Tolerance | ±0.04% | ±0.02% |
| Temperature Coefficient | 4ppm/°C | 2ppm/°C |
| Noise - 01 Hzto10 Hz | 1.25µVp-p | 1.6µVp-p |
| Voltage - Input | 3V ~ 15V | 3.1V ~ 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 and ADR4530BRZ voltage references?
The ADR4525ARZ provides a fixed 2.5 V output, while the ADR4530BRZ provides a fixed 3.0 V output. Both are members of the ADR45xx family of low-noise, high-accuracy voltage references in an 8-lead SOIC package, but they differ in output voltage, initial accuracy grade, and temperature coefficient grade as specified in their respective datasheets.
What initial accuracy and temperature coefficient grades do the ADR4525ARZ and ADR4530BRZ offer?
The ADR4525ARZ is specified with an A-grade initial accuracy of ±0.04% and a temperature coefficient of 2 ppm/°C (max). The ADR4530BRZ is specified with a B-grade initial accuracy of ±0.02% and a temperature coefficient of 1 ppm/°C (max). Designers should confirm these grades against the latest Analog Devices datasheet before finalizing a design.
Are the ADR4525ARZ and ADR4530BRZ pin-compatible?
Yes. Both devices are offered in the same 8-lead SOIC package with an identical pinout, so they are pin-compatible. However, because the output voltages differ (2.5 V vs. 3.0 V), the surrounding circuit must be validated for the new output voltage before substitution.
What is the operating temperature range for these voltage references?
Both the ADR4525ARZ and ADR4530BRZ are specified for the industrial temperature range of −40 °C to +125 °C, as stated in the Analog Devices datasheets.
Can the ADR4525ARZ be replaced directly by the ADR4530BRZ in an existing design?
Not without validation. Although the parts are pin-compatible, the output voltage changes from 2.5 V to 3.0 V, which affects downstream circuitry such as ADC references, DAC full-scale ranges, and comparator thresholds. The design must be re-verified against the ADR4530BRZ datasheet before substitution.
What are the typical noise and long-term drift specifications for these references?
Both devices are low-noise references in the ADR45xx family. The ADR4525ARZ and ADR4530BRZ datasheets specify low-frequency noise and long-term drift performance; designers should consult the official Analog Devices datasheet for the exact noise (µV p-p) and long-term drift (ppm) values applicable to each grade before use.
What supply voltage and current requirements apply to the ADR4525ARZ and ADR4530BRZ?
Both devices operate from a supply voltage above their respective output voltages, with the ADR4530BRZ requiring a higher minimum supply headroom than the ADR4525ARZ due to its 3.0 V output. Quiescent current and dropout specifications should be verified from the Analog Devices datasheet for each part.