Specifications
| Attribute | Value |
| Package | Tape & Reel (TR),Cut Tape (CT),Bulk |
| Series | REF02 |
| ProductStatus | Active |
| ReferenceType | Series |
| OutputType | Fixed |
| Voltage-Output(Min/Fixed) | 5V |
| Current-Output | 21 mA |
| Tolerance | ±0.2% |
| TemperatureCoefficient | 10ppm/°C |
| Noise-01Hzto10Hz | 4µVp-p |
| Voltage-Input | 8V ~ 40V |
| Current-Supply | 1.4mA |
| OperatingTemperature | -40°C ~ 85°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
Overview
Description
REF02BU/2K5 is a precision 2.5 V voltage reference (the REF02 family). The BU suffix indicates the packaging variant, and 2K5 confirms a 2.5 V output. It provides a stable reference voltage with low drift and low noise for analog circuits, ADCs/DACs, and instrumentation. Key points:
- Requires a supply higher than the output (typical 5–30 V) and proper decoupling on the output.
- Offers good line and load regulation, low temperature coefficient, and protection features.
- Should be used as the reference input for ADCs/DACs or precision comparators; requires a minimum load/current per the datasheet.
For exact numbers (tolerances, TC, noise, min load, etc.), consult the specific BU variant datasheet.
- Requires a supply higher than the output (typical 5–30 V) and proper decoupling on the output.
- Offers good line and load regulation, low temperature coefficient, and protection features.
- Should be used as the reference input for ADCs/DACs or precision comparators; requires a minimum load/current per the datasheet.
For exact numbers (tolerances, TC, noise, min load, etc.), consult the specific BU variant datasheet.
Equivalent
Equivalents for REF02BU/2K5 (2.5 V fixed reference) include:
- LM336-2.5 (2.5 V shunt reference)
- LM385-2.5 (2.5 V shunt reference)
- LM4040-2.5 (2.5 V fixed reference)
- LT6650-2.5 / LT6654-2.5 (precision 2.5 V references)
Note: check pinout, current draw, and package differences; some are shunt types.
- LM336-2.5 (2.5 V shunt reference)
- LM385-2.5 (2.5 V shunt reference)
- LM4040-2.5 (2.5 V fixed reference)
- LT6650-2.5 / LT6654-2.5 (precision 2.5 V references)
Note: check pinout, current draw, and package differences; some are shunt types.
Features
REF02BU/2K5 features:
- Fixed 2.5 V precision voltage reference.
- Tight initial accuracy with low temperature coefficient for stable output across temperature.
- Low output noise suitable for ADC/DAC reference use.
- Low dynamic impedance with excellent line and load regulation.
- Capable of sourcing/sinking modest output current for reference-driven circuitry.
- Wide operating voltage range with good power-supply rejection.
- Excellent long-term stability and reliability.
- Available in compact packages (BU variants in TO-92 and SMT) for easy PCB integration.
- Fixed 2.5 V precision voltage reference.
- Tight initial accuracy with low temperature coefficient for stable output across temperature.
- Low output noise suitable for ADC/DAC reference use.
- Low dynamic impedance with excellent line and load regulation.
- Capable of sourcing/sinking modest output current for reference-driven circuitry.
- Wide operating voltage range with good power-supply rejection.
- Excellent long-term stability and reliability.
- Available in compact packages (BU variants in TO-92 and SMT) for easy PCB integration.
Pinout
- Pin count: 8 pins (DIP-8/SO-8 package)
- Function: Precision buffered 2.5 V voltage reference (REF02 family). It provides a stable 2.5 V reference output suitable for ADC/DAC reference usage; includes internal buffering for drive capability. The “2K5” indicates 2.5 V output; BU denotes the package variant.
- Function: Precision buffered 2.5 V voltage reference (REF02 family). It provides a stable 2.5 V reference output suitable for ADC/DAC reference usage; includes internal buffering for drive capability. The “2K5” indicates 2.5 V output; BU denotes the package variant.
Manufacturer
Analog Devices, Inc. (ADI). ADI is a global American semiconductor company that designs and manufactures high-performance analog, mixed-signal, and DSP integrated circuits.
Application
Typical application areas for REF02BU/2K5 (2.5 V reference):
- Precision ADC/DAC reference in instrumentation, data acquisition, and test equipment
- Calibration standard for voltmeters, DMMs, and calibration rigs
- Front-end reference for precision op-amps, instrumentation amplifiers, and bridge circuits
- Sensor conditioning and bridge-based sensors (strain gauges, RTDs, thermistors)
- Portable/bench-top instruments needing a compact, low-drift, low-noise reference
- Any system requiring a stable 2.5 V reference for digital/analog circuits or microcontroller interfaces
- Precision ADC/DAC reference in instrumentation, data acquisition, and test equipment
- Calibration standard for voltmeters, DMMs, and calibration rigs
- Front-end reference for precision op-amps, instrumentation amplifiers, and bridge circuits
- Sensor conditioning and bridge-based sensors (strain gauges, RTDs, thermistors)
- Portable/bench-top instruments needing a compact, low-drift, low-noise reference
- Any system requiring a stable 2.5 V reference for digital/analog circuits or microcontroller interfaces
Package
An 8-pin plastic DIP (DIP-8) package.
