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 ADR4550ARZ share the same series architecture, package, and pinout, differing primarily in output voltage (2.5 V vs 5.0 V). The ADR4550ARZ is a viable functional substitute for the ADR4525ARZ only where the higher 5.0 V reference is acceptable to the downstream circuit; otherwise the 2.5 V output must be validated against system requirements before substitution.
Output Voltage
Validation required
Package Type
High match
Pin Configuration
High match
Operating Temperature Range
High match
Parts at a glance
Part B
ADR4550ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4178 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 | ADR4550ARZ | Why it matters |
|---|---|---|---|
| Output Voltage | 2.5 V | 5.0 V | The reference voltage sets the full-scale input range of an ADC or the comparison threshold of a DAC; a 2.5 V vs 5.0 V reference directly changes system signal scaling and cannot be substituted without redesign. |
| Initial Accuracy | ±0.02% | ±0.02% | Initial accuracy determines the absolute error of the reference at room temperature, directly affecting measurement precision in precision data-acquisition systems. |
| Temperature Coefficient | 2 ppm/°C (max) | 2 ppm/°C (max) | Low tempco keeps the reference stable over temperature, which is critical for maintaining accuracy in industrial and instrumentation applications. |
| Output Current Capability | ±10 mA | ±10 mA | The sourcing/sinking capability determines whether the reference can drive the load (e.g., ADC reference input or external circuitry) without buffering. |
| Supply Voltage Range | 3.0 V to 15 V | 3.0 V to 15 V | The allowable supply range must accommodate the system rail; both parts share the same range, easing supply compatibility. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | The temperature range defines the environments in which the reference is guaranteed to meet specifications, important for industrial and automotive use. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Identical package and pinout allow drop-in board compatibility, simplifying substitution on an existing PCB footprint. |
| Low-Frequency Noise | 1.25 µV p-p (0.1 Hz to 10 Hz) | 2.5 µV p-p (0.1 Hz to 10 Hz) | Low-frequency noise limits the resolution of high-precision converters; the noise scales with output voltage, so the 5.0 V part exhibits proportionally higher noise. |
| Long-Term Drift | 25 ppm/1000 h | 25 ppm/1000 h | Long-term drift affects calibration stability over the product lifetime, reducing the need for periodic recalibration in precision systems. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADR4525ARZ | ADR4550ARZ |
|---|---|---|
| Part Status | Active | Active |
| Reference Type | Series | Series |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 2.5V | 5V |
| Current - Output | 10 mA | 10 mA |
| Tolerance | ±0.04% | ±0.04% |
| Temperature Coefficient | 4ppm/°C | 4ppm/°C |
| Noise - 01 Hzto10 Hz | 1.25µVp-p | 2.8µVp-p |
| Voltage - Input | 3V ~ 15V | 5.1V ~ 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 primary differences between the ADR4525ARZ and ADR4550ARZ voltage references?
The ADR4525ARZ provides a fixed 2.5 V output, while the ADR4550ARZ provides a fixed 5.0 V output. Both are members of the ADR45xx family of high-precision, low-noise, low-drift voltage references from Analog Devices, offered in an 8-lead SOIC package (RZ suffix).
Are the ADR4525ARZ and ADR4550ARZ pin-compatible?
Yes. Both devices are supplied in the same 8-lead SOIC (R-8) package with identical pin functions, so they are pin-compatible. However, because the output voltage differs (2.5 V vs 5.0 V), the surrounding circuit and supply headroom must be validated before substitution.
What initial accuracy do the ADR4525ARZ and ADR4550ARZ offer?
Both the ADR4525ARZ and ADR4550ARZ are A-grade devices with an initial output voltage accuracy of ±0.04% maximum at 25°C, per the Analog Devices ADR45xx datasheet.
What is the output voltage temperature coefficient of these references?
Both the ADR4525ARZ and ADR4550ARZ are specified with a maximum temperature coefficient of 2 ppm/°C over the −40°C to +125°C operating range, according to the ADR45xx datasheet.
What is the minimum supply voltage required for each device?
The ADR4525ARZ (2.5 V output) requires a minimum supply voltage of 3.0 V, while the ADR4550ARZ (5.0 V output) requires a minimum supply voltage of 5.5 V. Both devices accept a maximum supply voltage of 15 V.
How do the output noise specifications compare between the two parts?
Both devices are specified with low output voltage noise of 1.25 µV p-p (0.1 Hz to 10 Hz) typical, per the ADR45xx datasheet. The absolute noise is comparable, though the relative noise differs because the output voltages are 2.5 V and 5.0 V respectively.
Can the ADR4550ARZ be used as a drop-in replacement for the ADR4525ARZ?
No, not as a direct drop-in. Although the packages and pinouts are identical, the ADR4550ARZ outputs 5.0 V instead of 2.5 V and requires a higher minimum supply voltage (5.5 V vs 3.0 V). The system supply, downstream circuitry, and reference input range must all be verified before substitution.
What are the operating temperature ranges for the ADR4525ARZ and ADR4550ARZ?
Both devices are specified for the −40°C to +125°C industrial temperature range, as stated in the Analog Devices ADR45xx datasheet.