Part A
ADR4525ARZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4570 PCS
- Package
- SOIC-8
- Series
- PMIC - Voltage Reference
Replacement verdict
Compatible functional replacement candidate
The ADR4525ARZ and ADR4530ARZ are functionally compatible voltage reference candidates sharing the same package, pinout, output architecture, and operating temperature range, with the primary distinction being the nominal output voltage of 2.5 V versus 3.0 V. Designers must confirm that the 3.0 V output of the ADR4530ARZ satisfies the target system's reference requirements before substituting the ADR4525ARZ.
Output Voltage
Not compatible
Package Type
High match
Output Type
High match
Operating Temperature Range
High match
Parts at a glance
Part B
ADR4530ARZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7182 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 | ADR4525ARZ | ADR4530ARZ | Why it matters |
|---|---|---|---|
| Output Voltage | 2.5 V | 3.0 V | The nominal reference voltage determines the full-scale input range of the ADC or DAC it supports, so the two parts are not directly interchangeable without recalibration. |
| Initial Accuracy | ±0.02% (max) | ±0.02% (max) | Initial accuracy sets the uncalibrated system error; matching accuracy means both contribute the same worst-case offset to a design. |
| Temperature Coefficient | 2 ppm/°C (max) | 2 ppm/°C (max) | Drift over temperature dominates precision error in many systems; identical tempco means equivalent stability behavior across the operating range. |
| Output Current Capability | ±10 mA (source/sink) | ±10 mA (source/sink) | Drive capability determines whether the reference can directly bias external loads such as ADC reference inputs 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 can be reused. |
| Quiescent Current | 950 µA (typ) | 950 µA (typ) | Supply current affects power budget and self-heating; equal quiescent current means comparable power consumption in portable or thermally sensitive designs. |
| 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-precision DC measurements; matching noise performance preserves system accuracy. |
| Long-Term Drift | 25 ppm/1000 hr (typ) | 25 ppm/1000 hr (typ) | Long-term drift dictates recalibration intervals; identical drift means equivalent lifetime stability for the end application. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package compatibility allows the same PCB footprint and assembly process, simplifying substitution on an existing board. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADR4525ARZ | ADR4530ARZ |
|---|---|---|
| Part Status | Active | Active |
| Reference Type | Series | Series |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 2.5V | 3V |
| Current - Output | 10 mA | 10 mA |
| Tolerance | ±0.04% | ±0.04% |
| Temperature Coefficient | 4ppm/°C | 4ppm/°C |
| Noise - 01 Hzto10 Hz | 1.25µVp-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 ADR4525ARZ and ADR4530ARZ voltage references?
The primary difference is the output voltage: the ADR4525ARZ provides a fixed 2.5 V output, while the ADR4530ARZ provides a fixed 3.0 V output. Both are members of the ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 family of high-precision, low-noise, low-drift voltage references from Analog Devices, offered in the same 8-lead SOIC package (R-8 suffix) and specified over the -40 °C to +125 °C temperature range.
Are the ADR4525ARZ and ADR4530ARZ pin-compatible?
Yes. Both devices are supplied in the same 8-lead SOIC (R-8) package with an identical pinout, so they are pin-compatible. The difference is the regulated output voltage at the VOUT pin (2.5 V versus 3.0 V), which must be accounted for in the target circuit.
What initial accuracy and temperature coefficient do these references offer?
Both the ADR4525ARZ and ADR4530ARZ are A-grade devices with ±0.02 % initial accuracy and a temperature coefficient of 1 ppm/°C typical (2 ppm/°C maximum) over the -40 °C to +125 °C range, per the Analog Devices ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 datasheet.
What are the output voltage noise and long-term drift specifications?
Both devices feature low output voltage noise of 1.25 µV p-p (0.1 Hz to 10 Hz) and 0.25 µV rms (10 Hz to 10 kHz), with long-term drift of 25 ppm typical per 1000 hours. These specifications are common to the ADR4525 and ADR4530 family members.
What is the operating supply voltage and current consumption?
Both the ADR4525ARZ and ADR4530ARZ operate from a supply voltage of 3.0 V to 15 V and draw a typical quiescent supply current of 950 µA. The minimum supply must exceed the output voltage plus the specified dropout, so the ADR4530ARZ (3.0 V output) requires a supply above 3.0 V.
Can the ADR4525ARZ and ADR4530ARZ be used interchangeably in a design?
They are pin-compatible but not electrically interchangeable without design review, because the output voltage differs (2.5 V versus 3.0 V). A substitution changes the reference voltage seen by the ADC or DAC, so the system's full-scale range, gain calibration, and supply headroom must be revalidated against the Analog Devices datasheet before replacing one with the other.
What are the operating temperature range and package options?
Both devices are specified over the -40 °C to +125 °C industrial temperature range and are offered in an 8-lead SOIC package (R-8 suffix). The ADR4525ARZ and ADR4530ARZ are the A-grade, SOIC variants of their respective output voltages.