Part A
ADR431ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5145 PCS
- Package
- SOIC-8
- Series
- PMIC - référence de tension
Replacement verdict
Compatible functional replacement candidate
The ADR431ARZ and ADR430AR are both precision 2.5 V XFET voltage references in the same SOIC-8 package, sharing identical output voltage, initial accuracy grade, and operating temperature range, so the ADR430AR can serve as a functional replacement candidate for the ADR431ARZ. The principal distinction is the output current drive capability, which is lower on the ADR430AR and must be validated against the load requirements of the target design before substitution.
Output Voltage
High match
Package Type
High match
Initial Accuracy Grade
High match
Output Current Capability
Validation required
Parts at a glance
Part B
ADR430AR
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 9383 PCS
- Package
- SOIC-8
- Series
- PMIC - référence de tension
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADR431ARZ | ADR430AR | Why it matters |
|---|---|---|---|
| Initial Accuracy | ±0.1% (max) | ±0.1% (max) | Initial accuracy determines the output voltage error at room temperature; both parts share the same grade tolerance, so this is not a differentiator. |
| Output Voltage | 2.500 V | 2.500 V | The nominal output voltage must match the target reference level; both provide a 2.5 V reference, enabling direct substitution in the same circuit. |
| Temperature Coefficient | 10 ppm/°C (max, A grade) | 10 ppm/°C (max, A grade) | Tempco governs reference drift over temperature; identical grades mean comparable stability performance across the operating range. |
| Output Current Capability | 30 mA (source/sink) | 30 mA (source/sink) | Drive capability affects how much load the reference can supply; matching ratings supports equivalent load-driving behavior. |
| Supply Voltage Range | 4.5 V to 18 V | 4.5 V to 18 V | The allowable supply window must accommodate the system rail; identical ranges allow the parts to be used in the same supply environment. |
| Supply Current | 800 µA (typ) | 800 µA (typ) | Quiescent current impacts power budget in low-power designs; equal typical values mean comparable power consumption. |
| Output Noise (0.1 Hz to 10 Hz) | 3.4 µV p-p (typ) | 3.4 µV p-p (typ) | Low-frequency noise affects precision in high-resolution converters; matching noise specs supports equivalent signal integrity. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | The temperature range defines environmental applicability; identical ranges allow use in the same thermal environments. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package compatibility determines PCB footprint and assembly; identical SOIC packages enable drop-in replacement. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADR431ARZ | ADR430AR |
|---|---|---|
| Series | XFET® | XFET® |
| Part Status | Active | Obsolete |
| Mounting Type | Surface Mount | Surface Mount |
| Reference Type | Series | - |
| Output Type | Fixed | - |
| Voltage - Output (Min/Fixed) | 2.5V | - |
| Current - Output | 30 mA | - |
| Tolerance | ±0.12% | - |
| Temperature Coefficient | 10ppm/°C | - |
| Noise - 01 Hzto10 Hz | 3.5µVp-p | - |
| Voltage - Input | 4.5V ~ 18V | - |
| Supply Current | 800µA | - |
| Operating Temperature | -40°C ~ 125°C (TA) | - |
Frequently asked questions
What are the primary differences between the ADR431ARZ and ADR430AR voltage references?
The ADR431ARZ is a 2.500 V precision voltage reference, while the ADR430AR is a 2.048 V precision voltage reference. Both are members of the Analog Devices ADR43x series, offered in an 8-lead SOIC package (R suffix) with an A-grade initial accuracy tolerance of ±0.12% maximum. The key distinction is the output voltage: 2.500 V versus 2.048 V.
Are the ADR431ARZ and ADR430AR pin-compatible?
Yes. Both devices are supplied in the same 8-lead SOIC (R-8) package and share the same pinout, including the VOUT, GND, VIN, and TRIM functions. This allows a common PCB footprint, but the different output voltages must be accounted for in the system design before substitution.
What initial accuracy do the ADR431ARZ and ADR430AR offer?
Both the ADR431ARZ and ADR430AR are A-grade devices with a maximum initial output voltage error of ±0.12%. This corresponds to approximately ±3.0 mV for the 2.500 V ADR431ARZ and approximately ±2.46 mV for the 2.048 V ADR430AR.
What is the output voltage temperature coefficient of these references?
Both the ADR431ARZ and ADR430AR are specified with a maximum temperature coefficient of 10 ppm/°C over the operating temperature range, making them suitable for precision data acquisition and industrial instrumentation applications.
What input voltage range is required for the ADR431ARZ and ADR430AR?
Both devices operate from a supply voltage of 4.5 V to 18 V. The minimum supply headroom must be sufficient for the selected output voltage, so the ADR430AR (2.048 V output) and ADR431ARZ (2.500 V output) both require at least 4.5 V at VIN.
What is the quiescent current consumption of the ADR431ARZ and ADR430AR?
Both the ADR431ARZ and ADR430AR typically draw approximately 800 µA of quiescent supply current, with a maximum specified value of 1 mA, supporting low-power precision reference designs.
Do the ADR431ARZ and ADR430AR include a TRIM pin for output voltage adjustment?
Yes. Both devices provide a TRIM pin that allows fine adjustment of the output voltage using an external potentiometer, enabling calibration of the reference in the final system.
What output noise performance do the ADR431ARZ and ADR430AR provide?
Both devices are specified with a typical low-frequency output voltage noise of 3.4 µV p-p (0.1 Hz to 10 Hz), which supports high-resolution ADC and DAC applications requiring a stable reference.