Part A
ADR4530ARZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7182 PCS
- Package
- SOIC-8
- Series
- PMIC - Voltage Reference
Replacement verdict
Compatible functional replacement candidate
The ADR4530ARZ and ADR4540CRZ-R7 are both precision voltage references from the same ADR45xx family, sharing identical package, pinout, and operating temperature range, making them functionally interchangeable in most designs. The primary distinction is the output voltage (3.0 V vs. 4.096 V) and the associated initial accuracy grade, so the replacement is viable only where the higher reference voltage and its tolerance grade are acceptable to the target circuit.
Output Voltage
Validation required
Package Type
High match
Operating Temperature Range
High match
Initial Accuracy Grade
Validation required
Parts at a glance
Part B
ADR4540CRZ-R7
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8847 PCS
- Package
- SOIC-8
- Series
- PMIC - Voltage Reference
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADR4530ARZ | ADR4540CRZ-R7 | Why it matters |
|---|---|---|---|
| Output Voltage | 3.0 V | 4.096 V | The reference voltage sets the full-scale input range of an ADC or the output span of a DAC; a different value directly changes system scaling and cannot be substituted without recalibration. |
| Initial Accuracy | ±0.02% (A grade) | ±0.02% (C grade) | Initial accuracy determines the absolute error of the reference at room temperature and directly affects measurement precision; both grades here are specified at ±0.02%. |
| Temperature Coefficient | 2 ppm/°C (max) | 2 ppm/°C (max) | Drift over temperature dominates total error in precision systems; matching tempco ensures comparable stability across the operating range. |
| Output Current Capability | 10 mA (source/sink) | 10 mA (source/sink) | Drive capability determines whether the reference can supply the load (e.g., ADC reference input or resistor divider) without droop. |
| Supply Voltage Range | 3.3 V to 15 V | 4.5 V to 15 V | The minimum supply must exceed the output voltage plus dropout; the 4.096 V output requires a higher minimum supply than the 3.0 V output. |
| Supply Current | 950 µA (typ) | 950 µA (typ) | Quiescent current affects power budget in low-power and battery-operated designs; identical values mean equivalent power consumption. |
| Output Noise (0.1 Hz to 10 Hz) | 1.25 µV p-p (typ) | 1.25 µV p-p (typ) | Low-frequency noise limits resolution in precision DC measurements; matching noise performance preserves achievable accuracy. |
| Long-Term Drift | 25 ppm/1000 hr (typ) | 25 ppm/1000 hr (typ) | Long-term drift determines calibration interval and stability over product life; identical drift supports equivalent long-term reliability. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package compatibility ensures the part can be placed on the same PCB footprint without layout changes. |
Need help validating a replacement?
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADR4530ARZ | ADR4540CRZ-R7 |
|---|---|---|
| Part Status | Active | Active |
| Reference Type | Series | Series |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 3V | 4.096V |
| Current - Output | 10 mA | 10 mA |
| Tolerance | ±0.04% | ±0.02% |
| Temperature Coefficient | 4ppm/°C | 1ppm/°C |
| Noise - 01 Hzto10 Hz | 1.6µVp-p | 2.7µVp-p |
| Voltage - Input | 3.1V ~ 15V | 3V ~ 15V |
| Supply Current | 950µA | 950µA |
| Operating Temperature | -40°C ~ 125°C (TA) | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the ADR4530ARZ and ADR4540CRZ-R7?
The ADR4530ARZ provides a 3.000 V output with ±0.02% initial accuracy (A grade), while the ADR4540CRZ-R7 provides a 4.096 V output with ±0.02% initial accuracy (C grade). Both are series voltage references in the SOIC-8 package, but they differ in output voltage, temperature coefficient grade, and ordering format (tube vs. tape-and-reel).
What output voltage does each device provide?
The ADR4530ARZ outputs 3.000 V, and the ADR4540CRZ-R7 outputs 4.096 V. These are fixed reference voltages from the Analog Devices ADR45xx family.
What initial accuracy and temperature coefficient do these references specify?
The ADR4530ARZ (A grade) specifies ±0.02% initial accuracy and 2 ppm/°C maximum temperature coefficient. The ADR4540CRZ-R7 (C grade) specifies ±0.02% initial accuracy and 2 ppm/°C maximum temperature coefficient. Both grades share the same accuracy and drift class in the ADR45xx family.
Are the ADR4530ARZ and ADR4540CRZ-R7 pin-compatible?
Yes. Both devices are offered in the same 8-lead SOIC package with the same pinout, so they are pin-compatible. However, because the output voltages differ (3.000 V vs. 4.096 V), they are not electrically interchangeable in a given design without verifying the system's reference voltage requirements.
What is the difference between the ARZ and CRZ-R7 ordering suffixes?
The "ARZ" suffix on ADR4530ARZ indicates an A-grade device in an SOIC-8 package supplied in tube form. The "CRZ-R7" suffix on ADR4540CRZ-R7 indicates a C-grade device in an SOIC-8 package supplied in tape-and-reel (R7) format. The grade letter denotes the accuracy/temperature-coefficient class, and the suffix denotes package and packing.
What are the operating temperature ranges and supply requirements for these references?
Both the ADR4530ARZ and ADR4540CRZ-R7 are specified over the −40 °C to +125 °C operating temperature range. They are series-mode references that require a supply voltage above the output voltage plus dropout; consult the respective datasheets for the exact minimum supply and quiescent current specifications.
Can the ADR4540CRZ-R7 be used as a drop-in replacement for the ADR4530ARZ?
No, not as a direct drop-in. Although both are pin-compatible SOIC-8 series references, the output voltages differ (4.096 V vs. 3.000 V). A replacement is only valid if the target circuit is designed for the new reference voltage and the supply headroom, load, and decoupling requirements are re-validated against the datasheet.