Part A
ADR4520ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2343 Stückzahl
- Package
- SOIC-8
- Series
- PMIC Spannung Referenz
Replacement verdict
Compatible functional replacement candidate
The ADR4525ARZ-R7 and ADR4520ARZ share the same series, package, and pinout, making them functionally interchangeable in most designs; however, the ADR4525ARZ-R7 provides a higher output voltage (2.5 V vs 2.0 V), so the replacement is only valid where the downstream circuitry tolerates the increased reference voltage. Verify the output voltage requirement 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
ADR4525ARZ-R7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6327 Stückzahl
- Package
- SOIC-8
- Series
- PMIC Spannung Referenz
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-R7 | ADR4520ARZ | Why it matters |
|---|---|---|---|
| Output Voltage | 2.5 V | 2.048 V | The reference output voltage is the primary functional characteristic; a different value means the parts are not directly substitutable in a given circuit. |
| Initial Accuracy | ±0.02% | ±0.02% | Initial accuracy determines the reference's tolerance at room temperature and directly affects system measurement precision. |
| Temperature Coefficient | 2 ppm/°C (max) | 2 ppm/°C (max) | Low tempco ensures the reference remains stable over temperature, critical for precision data acquisition and instrumentation. |
| Output Current Capability | 10 mA (source/sink) | 10 mA (source/sink) | Determines how much load current the reference can drive while maintaining regulation. |
| Supply Voltage Range | 3.0 V to 15 V | 3.0 V to 15 V | Defines the allowable input supply range for proper operation and compatibility with the system rail. |
| Supply Current | 950 µA (typ) | 950 µA (typ) | Quiescent current impacts power budget, especially in low-power or battery-operated designs. |
| Low-Frequency Noise | 1.25 µV p-p (0.1 Hz to 10 Hz) | 1.25 µV p-p (0.1 Hz to 10 Hz) | Low noise is essential for high-resolution ADCs and precision signal chains where reference noise limits performance. |
| Long-Term Drift | 25 ppm/1000 h | 25 ppm/1000 h | Long-term stability affects calibration intervals and accuracy retention over the product lifetime. |
| 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?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADR4520ARZ | ADR4525ARZ-R7 |
|---|---|---|
| Part Status | Active | Active |
| Reference Type | Series | Series |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 2.048V | 2.5V |
| Current - Output | 10 mA | 10 mA |
| Tolerance | ±0.04% | ±0.04% |
| Temperature Coefficient | 4ppm/°C | 4ppm/°C |
| Noise - 01 Hzto10 Hz | 1µVp-p | 1.25µVp-p |
| Voltage - Input | 3V ~ 15V | 3V ~ 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-R7 and ADR4520ARZ?
The primary difference is the output voltage: the ADR4525ARZ-R7 provides a fixed 2.5 V output, while the ADR4520ARZ provides a fixed 2.048 V output. Both are members of the ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 family of low-noise, high-accuracy voltage references from Analog Devices, offered in an 8-lead SOIC package (RZ suffix) and specified over the -40 °C to +125 °C temperature range.
Are the ADR4525ARZ-R7 and ADR4520ARZ pin-compatible?
Yes. Both devices are supplied in the same 8-lead SOIC (RZ) package and share the same pinout, so they are pin-compatible. However, because the output voltage differs (2.5 V vs 2.048 V), a design substitution requires verifying that the system can accept the different reference voltage.
What initial accuracy do the ADR4525ARZ-R7 and ADR4520ARZ offer?
Both the ADR4525ARZ-R7 and ADR4520ARZ are A-grade devices with an initial output voltage accuracy of ±0.04% maximum at 25 °C, per the Analog Devices ADR4520/ADR4525 datasheet.
What is the output voltage temperature coefficient of these references?
The A-grade ADR4525ARZ-R7 and ADR4520ARZ are specified with a maximum output voltage temperature coefficient of 2 ppm/°C over the -40 °C to +125 °C operating temperature range, according to the manufacturer datasheet.
What is the operating temperature range for the ADR4525ARZ-R7 and ADR4520ARZ?
Both devices are specified for operation over the -40 °C to +125 °C industrial temperature range, as stated in the Analog Devices ADR4520/ADR4525 datasheet.
What is the difference between the R7 and non-R7 ordering suffixes?
The "-R7" suffix on ADR4525ARZ-R7 denotes tape-and-reel packaging (7-inch reel) from Analog Devices. The ADR4520ARZ is the base orderable part number; reel quantity and packaging options should be confirmed against the manufacturer's ordering guide for the specific order code.
Can the ADR4520ARZ be used as a drop-in replacement for the ADR4525ARZ-R7?
Not as a direct drop-in replacement, because the output voltage changes from 2.5 V to 2.048 V. The package and pinout are the same, but the system's reference voltage, ADC/DAC full-scale range, and any resistor divider ratios must be revalidated for the 2.048 V output before substitution.
What are the supply voltage and current requirements for these references?
Both the ADR4525ARZ-R7 and ADR4520ARZ operate from a supply voltage of 3.0 V to 15 V and typically draw a low quiescent current on the order of 1 mA (typical), per the Analog Devices ADR4520/ADR4525 datasheet. The minimum supply must remain above the output voltage plus the specified dropout.