Part A
ADR4520BRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4412 PCS
- Package
- SOIC-8
- Series
- PMIC - Voltage Reference
Replacement verdict
Compatible functional replacement candidate
The ADR4530BRZ and ADR4520BRZ share the same package, pinout, output architecture, and operating temperature range, differing only in nominal output voltage (3.000 V vs 2.048 V). The ADR4530BRZ is a viable functional replacement for the ADR4520BRZ only where the higher 3.0 V reference is acceptable to the host circuit; designers must confirm that downstream ADC full-scale, supply headroom, and reference-driven bias levels tolerate the increased reference voltage before substituting.
Output Voltage
Validation required
Package Type
High match
Output Type
High match
Operating Temperature Range
High match
Parts at a glance
Part B
ADR4530BRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2957 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 | ADR4530BRZ | ADR4520BRZ | Why it matters |
|---|---|---|---|
| Output Voltage | 3.0 V | 2.048 V | The nominal reference voltage directly sets the full-scale input range of an ADC or DAC; a different value changes system scaling and is not a drop-in substitution. |
| Initial Accuracy | ±0.02% (B grade) | ±0.02% (B grade) | Initial tolerance determines the uncalibrated error budget of the reference; matching accuracy means comparable system precision without trimming. |
| Temperature Coefficient | 2 ppm/°C max (B grade) | 2 ppm/°C max (B grade) | Drift over temperature dominates reference error in precision systems; identical tempco ensures equivalent stability across the operating range. |
| Output Current Capability | ±10 mA | ±10 mA | Source/sink current determines the load the reference can drive while maintaining regulation; equal capability supports similar loading conditions. |
| Supply Voltage Range | 3.0 V to 15 V | 3.0 V to 15 V | The allowable supply window must accommodate the system rail; identical ranges mean the same power supply design can be reused. |
| Supply Current | 950 µA typ | 950 µA typ | Quiescent current affects total power budget in low-power designs; matching consumption preserves the same thermal and battery-life profile. |
| Output Noise (0.1 Hz to 10 Hz) | 1.25 µV p-p typ | 1.25 µV p-p typ | Low-frequency noise limits achievable resolution in high-resolution converters; equal noise performance maintains the same effective resolution. |
| Long-Term Drift | 25 ppm/1000 hr typ | 25 ppm/1000 hr typ | Long-term stability determines recalibration intervals; identical drift means the same maintenance schedule and lifetime accuracy can be expected. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package and pinout compatibility enables board-level interchangeability without layout changes. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | The rated temperature range must cover the application environment; identical ranges ensure equivalent qualification for the same conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADR4520BRZ | ADR4530BRZ |
|---|---|---|
| Part Status | Active | Active |
| Reference Type | Series | Series |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 2.048V | 3V |
| Current - Output | 10 mA | 10 mA |
| Tolerance | ±0.02% | ±0.02% |
| Temperature Coefficient | 2ppm/°C | 2ppm/°C |
| Noise - 01 Hzto10 Hz | 1µVp-p | 1.6µVp-p |
| Voltage - Input | 3V ~ 15V | 3.1V ~ 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 key differences between the ADR4530BRZ and ADR4520BRZ voltage references?
The ADR4530BRZ provides a fixed 3.000 V output, while the ADR4520BRZ provides a fixed 2.048 V output. Both are members of the Analog Devices ADR45xx series of high-accuracy, low-noise, low-drift voltage references in an 8-lead SOIC package (R suffix), with the B grade offering tighter initial accuracy and lower temperature coefficient than lower grades.
Are the ADR4530BRZ and ADR4520BRZ pin-compatible?
Yes. Both devices are offered in the same 8-lead SOIC (R-8) package with identical pin functions, so they are pin-compatible. However, because the output voltages differ (3.000 V vs 2.048 V), they are not electrically interchangeable without verifying that the target circuit accepts the different reference voltage.
What initial accuracy do the ADR4530BRZ and ADR4520BRZ offer?
Both are B-grade devices in the ADR45xx family, which specifies a tight initial output voltage accuracy (on the order of ±0.02% at 25°C per the Analog Devices datasheet). Designers should confirm the exact accuracy specification against the current official datasheet for each part number before finalizing a design.
What is the operating temperature range for these voltage references?
The ADR4530BRZ and ADR4520BRZ are specified over the extended industrial temperature range of −40°C to +125°C, making them suitable for industrial, instrumentation, and precision data-acquisition applications.
Can the ADR4530BRZ be used as a drop-in replacement for the ADR4520BRZ?
No, not as a direct drop-in. Although the packages and pinouts match, the output voltages differ (3.000 V vs 2.048 V). A replacement is only valid if the surrounding circuit, such as ADC reference scaling, comparator thresholds, and calibration constants, is redesigned or recalibrated for the new reference voltage.
What are typical applications for the ADR4530BRZ and ADR4520BRZ?
Both parts are used as precision voltage references in high-resolution ADCs and DACs, precision instrumentation, medical equipment, industrial process control, and test-and-measurement systems. The ADR4520BRZ's 2.048 V output suits systems requiring a binary-scaled reference, while the ADR4530BRZ's 3.000 V output suits 3 V-referenced signal chains.
Do both parts share the same package and mounting type?
Yes. Both the ADR4530BRZ and ADR4520BRZ are supplied in the 8-lead SOIC surface-mount package (R suffix) and share the same PCB land pattern, allowing a common footprint across designs that use either reference voltage.