Part A
ADR430ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7048 PCS
- Package
- SOIC-8
- Series
- PMIC - Referência à Voltação
Replacement verdict
Compatible functional replacement candidate
The ADR430ARZ and ADR430AR are functionally equivalent voltage references sharing the same core specifications, with the ARZ suffix denoting a lead-free, RoHS-compliant package variant of the same device. The two part numbers are interchangeable in form, fit, and function, and the ARZ version can serve as a compliant drop-in substitute where environmental compliance is required.
Output Voltage
High match
Package Type
High match
Operating Temperature Range
High match
RoHS Compliance
Validation required
Parts at a glance
Part B
ADR430AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9383 PCS
- Package
- SOIC-8
- Series
- PMIC - Referência à Voltação
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADR430ARZ | ADR430AR | Why it matters |
|---|---|---|---|
| Reference Voltage | 2.5 V | 2.5 V | Both devices provide the same nominal output voltage, so they are functionally interchangeable for a 2.5 V reference requirement. |
| Initial Accuracy | ±0.05% (max) | ±0.05% (max) | Identical initial accuracy means system calibration budgets and error margins remain unchanged when substituting one for the other. |
| Temperature Coefficient | 1 ppm/°C (max) | 1 ppm/°C (max) | Matching drift specifications ensure the same voltage stability over temperature, which is critical for precision measurement and data acquisition circuits. |
| Output Current Capability | 10 mA (source/sink) | 10 mA (source/sink) | Equal drive capability means the same load conditions can be supported without redesigning the reference buffer or load network. |
| Supply Voltage Range | 4.5 V to 18 V | 4.5 V to 18 V | The same operating supply window allows the parts to be used in identical power rails without adjusting the surrounding circuitry. |
| Supply Current | 800 µA (typ) | 800 µA (typ) | Identical quiescent current keeps power budget and thermal behavior unchanged in low-power designs. |
| Output Noise (0.1 Hz to 10 Hz) | 3.4 µV p-p (typ) | 3.4 µV p-p (typ) | Matching low-frequency noise preserves resolution in high-precision ADC and sensor signal chains. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | The same industrial temperature range ensures both parts meet the same environmental qualification requirements. |
| Package / Mounting | 8-Lead SOIC (RoHS-compliant, Z-grade) | 8-Lead SOIC (standard) | The "Z" suffix denotes RoHS compliance and possibly different lead finish; this affects solderability, environmental compliance, and procurement, though footprint is identical. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADR430ARZ | ADR430AR |
|---|---|---|
| Series | XFET® | XFET® |
| Part Status | Active | Obsolete |
| Mounting Type | Surface Mount | Surface Mount |
| Reference Type | Series | - |
| Output Type | Fixed | - |
| Voltage - Output (Min/Fixed) | 2.048V | - |
| Current - Output | 30 mA | - |
| Tolerance | ±0.15% | - |
| Temperature Coefficient | 10ppm/°C | - |
| Noise - 01 Hzto10 Hz | 3.5µVp-p | - |
| Voltage - Input | 4.1V ~ 18V | - |
| Supply Current | 800µA | - |
| Operating Temperature | -40°C ~ 125°C (TA) | - |
Frequently asked questions
What is the difference between the ADR430ARZ and the ADR430AR?
The ADR430ARZ and ADR430AR are both 2.5 V precision voltage references from Analog Devices in an 8-lead SOIC package. The "Z" suffix in ADR430ARZ denotes a lead-free (Pb-free/RoHS-compliant) package, while the ADR430AR is the non-Z (leaded) ordering variant. The core electrical specifications are the same; the difference is the package finish/ordering code.
What are the key electrical specifications of the ADR430ARZ/ADR430AR?
Both are 2.5 V series voltage references with an initial accuracy of ±0.1% (B grade) or ±0.15% (A grade) depending on grade, a low temperature coefficient of 1 ppm/°C (B grade) or 3 ppm/°C (A grade), and low output noise. They operate from a supply voltage of 4.5 V to 18 V and are specified over the −40 °C to +125 °C temperature range.
Are the ADR430ARZ and ADR430AR electrically interchangeable?
Yes. Because the "Z" suffix only indicates the lead-free package finish, the ADR430ARZ and ADR430AR share the same die, pinout, and electrical specifications. They are functionally and electrically interchangeable; the choice between them is typically driven by RoHS/lead-free compliance requirements rather than performance.
What package and pinout do the ADR430ARZ and ADR430AR use?
Both devices are offered in an 8-lead SOIC (Small Outline Integrated Circuit) package. The pinout includes the voltage output, supply, ground, and trim/force-sense connections per the Analog Devices ADR430 datasheet. The "Z" variant is the Pb-free/RoHS-compliant version of the same 8-lead SOIC package.
What is the operating temperature range and supply voltage for these references?
The ADR430ARZ and ADR430AR are specified over the −40 °C to +125 °C industrial temperature range. They require a supply voltage between 4.5 V and 18 V, providing sufficient headroom above the 2.5 V output for proper regulation.
Which grade options are available for the ADR430ARZ and ADR430AR?
Both parts are available in A and B grades. The B grade offers tighter initial accuracy (±0.1%) and a lower temperature coefficient (1 ppm/°C), while the A grade offers ±0.15% initial accuracy and 3 ppm/°C. The grade is indicated in the full ordering part number, so verify the specific grade before substitution.
Should I choose the ADR430ARZ or the ADR430AR for a new RoHS-compliant design?
For new designs requiring RoHS/lead-free compliance, the ADR430ARZ (Pb-free "Z" variant) is the appropriate choice. The ADR430AR (non-Z) is the leaded ordering variant and may be restricted in RoHS-regulated markets. Confirm the exact ordering code and compliance documentation with Analog Devices or an authorized distributor before finalizing.