Part A
ADR430ARZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7048 ПКС
- Package
- SOIC-8
- Series
- PMIC - Справочник напряжения
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
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.