Part A
ADR4550BRZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2013 個数
- Package
- SOIC-8
- Series
- PMIC - 電圧リファレンス
Replacement verdict
Compatible functional replacement candidate
The ADR4550ARZ-R7 and ADR4550BRZ are functionally compatible voltage reference ICs sharing the same output voltage, package, and pinout, with the BRZ grade offering a tighter initial accuracy and lower temperature coefficient. The ARZ-R7 variant is supplied in tape-and-reel packaging, making the two parts interchangeable for most designs where the tighter grade tolerance of the BRZ is acceptable or preferred.
Output Voltage
High match
Package Type
High match
Initial Accuracy Grade
Validation required
Temperature Coefficient
Validation required
Parts at a glance
Part B
ADR4550ARZ-R7
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6435 個数
- Package
- SOIC-8
- Series
- PMIC - 電圧リファレンス
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADR4550ARZ-R7 | ADR4550BRZ | Why it matters |
|---|---|---|---|
| Initial Accuracy (Vout) | ±0.04% (max) | ±0.02% (max) | Tighter initial tolerance reduces system calibration effort and directly affects output voltage precision at room temperature. |
| Temperature Coefficient | 2 ppm/°C (max) | 1 ppm/°C (max) | Lower tempco means less output drift over temperature, critical for precision instrumentation and high-resolution data converters. |
| Output Voltage | 5.0 V | 5.0 V | Both provide the same nominal output, so the reference voltage matches the target system requirement identically. |
| Output Current Capability | 10 mA (source/sink) | 10 mA (source/sink) | Identical drive capability ensures the same load handling and buffering behavior in the application circuit. |
| Supply Voltage Range | 3.0 V to 15 V | 3.0 V to 15 V | Same operating supply window allows drop-in use with the same power rail design. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Matching temperature ratings ensure equivalent environmental robustness for industrial and automotive use. |
| Package | 8-Lead SOIC (R-8) | 8-Lead SOIC (R-8) | Same footprint and package allow direct PCB substitution without layout changes. |
| Supply Current | 950 µA (typ) | 950 µA (typ) | Equivalent quiescent current keeps power budget and thermal behavior unchanged. |
| Output Noise (0.1 Hz to 10 Hz) | 2.4 µV p-p (typ) | 2.4 µV p-p (typ) | Same low-frequency noise performance preserves resolution in precision ADC/DAC applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADR4550BRZ | ADR4550ARZ-R7 |
|---|---|---|
| Part Status | Active | Active |
| Reference Type | Series | Series |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 5V | 5V |
| Current - Output | 10 mA | 10 mA |
| Tolerance | ±0.02% | ±0.04% |
| Temperature Coefficient | 2ppm/°C | 4ppm/°C |
| Noise - 01 Hzto10 Hz | 2.8µVp-p | 2.8µVp-p |
| Voltage - Input | 5.1V ~ 15V | 5.1V ~ 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 is the difference between the ADR4550ARZ-R7 and the ADR4550BRZ?
Both devices are 5.0 V high-precision voltage references in an 8-lead SOIC package, but they differ in initial accuracy and temperature coefficient grade. The ADR4550A (ARZ-R7) offers ±0.04% initial accuracy and 2 ppm/°C maximum temperature coefficient, while the ADR4550B (BRZ) offers ±0.02% initial accuracy and 1 ppm/°C maximum temperature coefficient.
Are the ADR4550ARZ-R7 and ADR4550BRZ pin-compatible?
Yes. Both parts are offered in the same 8-lead SOIC (R-8) package with identical pin functions, so they are pin-compatible and share the same PCB land pattern.
What output voltage do the ADR4550ARZ-R7 and ADR4550BRZ provide?
Both devices provide a fixed 5.000 V output reference voltage.
What is the initial accuracy of each grade?
The ADR4550ARZ-R7 has a maximum initial accuracy of ±0.04% (±2 mV), while the ADR4550BRZ has a maximum initial accuracy of ±0.02% (±1 mV).
How do the temperature coefficients of the two grades compare?
The ADR4550ARZ-R7 is specified with a maximum temperature coefficient of 2 ppm/°C, and the ADR4550BRZ is specified with a maximum temperature coefficient of 1 ppm/°C over the operating temperature range.
Can the ADR4550ARZ-R7 be used as a drop-in replacement for the ADR4550BRZ?
Because both parts share the same package, pinout, and 5.0 V output, the ADR4550ARZ-R7 can replace the ADR4550BRZ in most designs, but the system error budget must be re-evaluated since the A grade has looser initial accuracy and temperature coefficient specifications than the B grade.
What is the difference between the R7 and non-R7 ordering suffixes?
The R7 suffix on ADR4550ARZ-R7 denotes tape-and-reel packaging in a 7-inch reel, while the ADR4550BRZ is supplied in standard tube packaging. The device grade and electrical specifications are determined by the A or B designation, not the packaging suffix.
What are the operating temperature ranges and supply requirements for these references?
Both the ADR4550ARZ-R7 and ADR4550BRZ are specified over the −40 °C to +125 °C operating temperature range and operate from a supply voltage of 5.5 V to 15 V, with a specified quiescent current of 950 µA typical.