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 ADR4550CRZ-R7 are both high-precision voltage references from the same ADR45xx family, sharing a common SOIC-8 footprint and series structure, but they differ in output voltage and initial accuracy grade. The ADR4550CRZ-R7 offers a higher output voltage with tighter initial accuracy, making it a viable functional candidate only where the circuit's reference voltage and accuracy budget can accommodate the change; designers must validate the output voltage, accuracy tolerance, and thermal behavior against the target application before substitution.
Output Voltage
Validation required
Initial Accuracy
Validation required
Package Type
High match
Temperature Coefficient
Validation required
Parts at a glance
Part B
ADR4550CRZ-R7
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9067 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 | ADR4550CRZ-R7 | Why it matters |
|---|---|---|---|
| Output Voltage | 3.0 V | 5.0 V | The nominal reference voltage must match the system's required full-scale range; a 3.0 V and 5.0 V reference are not directly interchangeable in a given design. |
| Initial Accuracy | ±0.02% (max) | ±0.02% (max) | Initial accuracy determines the absolute error of the reference at room temperature and directly affects overall system measurement precision. |
| Temperature Coefficient | 2 ppm/°C (max) | 2 ppm/°C (max) | Low tempco ensures the reference stays stable over temperature, which is critical for high-resolution data acquisition and precision instrumentation. |
| Output Current Capability | 10 mA (source/sink) | 10 mA (source/sink) | The reference must be able to drive the load presented by the ADC or downstream circuitry without droop or instability. |
| Supply Voltage Range | 3.3 V to 15 V | 5.5 V to 15 V | The input supply must exceed the output voltage by the dropout headroom; the 5.0 V part requires a higher minimum supply than the 3.0 V part. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package footprint and thermal characteristics affect board layout and drop-in compatibility between the two parts. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | The operating range must cover the application's environmental conditions to guarantee specified performance. |
| Long-Term Drift | 25 ppm/1000 h (typ) | 25 ppm/1000 h (typ) | Long-term drift affects calibration stability over the product lifetime and determines how often recalibration is needed. |
| Output Noise (0.1 Hz to 10 Hz) | 1.25 µV p-p (typ) | 2.5 µV p-p (typ) | Low-frequency noise limits the achievable resolution of high-precision ADCs and is a key selection criterion for precision references. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADR4530ARZ | ADR4550CRZ-R7 |
|---|---|---|
| Part Status | Active | Active |
| Reference Type | Series | Series |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 3V | 5V |
| Current - Output | 10 mA | 10 mA |
| Tolerance | ±0.04% | ±0.02% |
| Temperature Coefficient | 4ppm/°C | 1ppm/°C |
| Noise - 01 Hzto10 Hz | 1.6µVp-p | 2.8µVp-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 ADR4550CRZ-R7?
The ADR4530ARZ provides a 3.000 V output with ±0.02% initial accuracy (A grade) and 2 ppm/°C maximum temperature coefficient, while the ADR4550CRZ-R7 provides a 5.000 V output with ±0.02% initial accuracy (C grade) and 2 ppm/°C maximum temperature coefficient. Both are series voltage references in an 8-lead SOIC package, but they differ in output voltage and specified operating temperature range: the ADR4530ARZ is rated for −40°C to +125°C, whereas the ADR4550CRZ-R7 is rated for 0°C to +70°C.
Are the ADR4530ARZ and ADR4550CRZ-R7 pin-compatible?
Yes. Both devices are offered in the same 8-lead SOIC (R-8) package with the same pinout, so they are pin-compatible. However, because their output voltages differ (3.000 V vs 5.000 V), they are not electrically interchangeable in a given circuit without verifying that the system tolerates the different reference voltage.
What is the initial accuracy and temperature coefficient of each device?
The ADR4530ARZ (A grade) specifies ±0.02% maximum initial accuracy and 2 ppm/°C maximum temperature coefficient. The ADR4550CRZ-R7 (C grade) also specifies ±0.02% maximum initial accuracy and 2 ppm/°C maximum temperature coefficient. Both grades therefore share the same accuracy and drift specifications, differing primarily in output voltage and temperature range.
What are the operating temperature ranges for these two references?
The ADR4530ARZ is specified over the extended industrial temperature range of −40°C to +125°C. The ADR4550CRZ-R7 is specified over the commercial temperature range of 0°C to +70°C. Designs requiring operation below 0°C or above +70°C should account for this difference when selecting between the two parts.
What output current can each reference source or sink?
Both the ADR4530ARZ and ADR4550CRZ-R7 are specified to source and sink up to 10 mA of output current. This allows them to drive moderate loads and reference inputs of ADCs and DACs without an external buffer in many applications.
What are the supply voltage and quiescent current requirements?
Both devices operate from a supply voltage of 3.0 V to 15 V (the ADR4530ARZ requires a supply at least equal to its 3.000 V output plus dropout, and the ADR4550CRZ-R7 requires at least its 5.000 V output plus dropout). Typical quiescent supply current is 950 µA for both parts, with low dropout voltage suitable for battery-powered and low-headroom systems.
How do the noise and long-term drift specifications compare?
Both the ADR4530ARZ and ADR4550CRZ-R7 specify low output voltage noise of 2.7 µV p-p (0.1 Hz to 10 Hz) and long-term drift of 25 ppm typical (1000 hours). These matched noise and stability characteristics make both parts suitable for precision data acquisition, though the absolute output voltage differs.
Can the ADR4550CRZ-R7 be used as a drop-in replacement for the ADR4530ARZ?
No, not as a direct drop-in replacement. Although both are pin-compatible 8-lead SOIC devices, the ADR4550CRZ-R7 outputs 5.000 V versus 3.000 V for the ADR4530ARZ, and its temperature range is 0°C to +70°C versus −40°C to +125°C. A replacement requires verifying that the higher reference voltage and narrower temperature range are acceptable for the target circuit and application environment.