Part A
ADR4540BRZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 7461 PCS
- Package
- SOIC-8
- Series
- PMIC - référence de tension
Replacement verdict
Compatible functional replacement candidate
The ADR4530BRZ and ADR4540BRZ are functionally compatible voltage reference candidates, sharing the same series architecture, package, and pinout, with the primary distinction being the nominal output voltage (3.0 V versus 4.096 V). The ADR4540BRZ can serve as a higher-voltage alternative where the circuit's supply headroom and reference requirements permit, while the ADR4530BRZ remains the appropriate choice for 3.0 V reference rails. Designers should confirm that the higher output voltage of the ADR4540BRZ is acceptable for the downstream ADC or DAC full-scale range before substituting.
Output Voltage
Validation required
Package Type
High match
Pin Configuration
High match
Operating Temperature Range
High match
Parts at a glance
Part B
ADR4530BRZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2957 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 | ADR4530BRZ | ADR4540BRZ | Why it matters |
|---|---|---|---|
| Output Voltage | 3.0 V | 4.096 V | The reference voltage sets the full-scale input range of an ADC or DAC; a different value changes the system's measurement span and cannot be substituted without recalibration. |
| Initial Accuracy | ±0.02% | ±0.02% | Initial accuracy determines the untrimmed error at room temperature; matching accuracy means both parts offer the same baseline precision. |
| Temperature Coefficient | 2 ppm/°C (max) | 2 ppm/°C (max) | Drift over temperature directly affects accuracy in precision systems; identical tempco means comparable stability across the operating range. |
| Output Current Capability | 10 mA (source/sink) | 10 mA (source/sink) | Drive capability determines how many loads or the ADC reference input the reference can support without buffering. |
| Supply Voltage Range | 3.0 V to 15 V | 3.0 V to 15 V | The allowable supply range must accommodate the system rail; identical ranges mean the same power supply design works for both. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | The temperature range defines the environments in which the part is guaranteed to meet specifications. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package compatibility ensures the part fits the same PCB footprint and thermal profile. |
| Long-Term Drift | 25 ppm/1000 h | 25 ppm/1000 h | Long-term drift affects calibration intervals and lifetime accuracy in precision instrumentation. |
| Output Noise (0.1 Hz to 10 Hz) | 1.25 µV p-p | 1.25 µV p-p | Low-frequency noise limits resolution in high-precision ADCs; matching noise performance preserves system accuracy. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADR4540BRZ | ADR4530BRZ |
|---|---|---|
| Part Status | Active | Active |
| Reference Type | Series | Series |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 4.096V | 3V |
| Current - Output | 10 mA | 10 mA |
| Tolerance | ±0.02% | ±0.02% |
| Temperature Coefficient | 2ppm/°C | 2ppm/°C |
| Noise - 01 Hzto10 Hz | 2.7µVp-p | 1.6µVp-p |
| Voltage - Input | 4.2V ~ 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 ADR4540BRZ voltage references?
The primary difference is the output voltage: the ADR4530BRZ provides a fixed 3.0 V output, while the ADR4540BRZ provides a fixed 4.096 V output. Both are members of the ADR45xx family of high-precision, low-noise, low-drift voltage references from Analog Devices and share the same SOIC-8 package and pinout, but their output voltages and associated accuracy specifications differ.
Are the ADR4530BRZ and ADR4540BRZ pin-compatible?
Yes. Both devices are offered in the same 8-lead SOIC package with an identical pin configuration, so they are pin-compatible. However, because the output voltage differs (3.0 V vs 4.096 V), the surrounding circuit must be validated for the new reference level before substitution.
What initial accuracy do the ADR4530BRZ and ADR4540BRZ offer?
Both the ADR4530BRZ and ADR4540BRZ are B-grade devices with an initial accuracy of ±0.02% (maximum) at 25°C, per the Analog Devices ADR45xx datasheet. The absolute output voltage differs (3.0 V vs 4.096 V), but the specified percentage accuracy grade is the same.
What is the temperature coefficient of the ADR4530BRZ and ADR4540BRZ?
Both B-grade parts are specified with a low temperature coefficient of 2 ppm/°C (maximum) over the operating temperature range, according to the Analog Devices ADR45xx datasheet. This makes them suitable for precision measurement and instrumentation applications.
What are the output noise and long-term drift specifications for these references?
Per the Analog Devices ADR45xx datasheet, both devices feature low output voltage noise of 2.7 µV p-p (0.1 Hz to 10 Hz) and long-term drift of 25 ppm per 1000 hours. These specifications are common to the ADR45xx family and support high-stability precision designs.
What supply voltage and current do the ADR4530BRZ and ADR4540BRZ require?
Both devices operate from a supply voltage of 3.0 V to 15 V and typically draw 950 µA of quiescent current, per the Analog Devices ADR45xx datasheet. Note that the ADR4540BRZ requires a supply voltage at least equal to its 4.096 V output plus dropout, so a 3.0 V supply is insufficient for the ADR4540BRZ.
Can the ADR4530BRZ be used as a drop-in replacement for the ADR4540BRZ?
No, not as a direct drop-in replacement. Although the parts are pin-compatible, the output voltage changes from 4.096 V to 3.0 V, which alters the reference level for any ADC, DAC, or comparator in the design. The circuit must be re-validated for the new reference voltage, and the supply voltage must remain within the 3.0 V to 15 V range with adequate headroom.
What are typical applications for the ADR4530BRZ and ADR4540BRZ?
Both references are intended for precision applications such as high-resolution data acquisition systems, precision instrumentation, medical equipment, and industrial process control. The ADR4530BRZ (3.0 V) suits systems operating from 3.3 V rails, while the ADR4540BRZ (4.096 V) is commonly used with ADCs and DACs that require a 4.096 V full-scale reference.