Specifications
| Attribute | Value |
| Package / Case | Tube |
| Series | XFET® |
| Part Status | Obsolete |
| Reference Type | Series |
| Output Type | Fixed |
| Voltage - Output (Min/Fixed) | 2.5V |
| Current - Output | 10 mA |
| Tolerance | ±0.04% |
| Temperature Coefficient | 3ppm/°C |
| Noise - 01 Hzto10 Hz | 1.75µVp-p |
| Voltage - Input | 4.5V ~ 18V |
| Supply Current | 600µA |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount |
Overview
Description
ADR421BR is Analog Devices’ high-precision, fixed-voltage reference IC. It provides a stable reference voltage for precision signal paths, ADCs/DACs, and instrumentation, with low noise and tight accuracy over temperature.
Key features (typical): low noise, very low drift (ppm/°C range), good line/load regulation, and robust performance across a wide supply and temperature range. It usually requires minimal external components (often just a bypass capacitor) and may include short‑circuit protection in some variants.
Typical applications: precision data acquisition, ADC/DAC calibration, instrumentation, and test/measurement equipment.
Package/variant note: BR denotes a RoHS-compliant packaging variant. Exact output voltage, pinout, and electrical specs depend on the specific ADR421BR part; please consult the latest Analog Devices datasheet for the precise nominal voltage, tolerance, temperature coefficient, and recommended usage.
Key features (typical): low noise, very low drift (ppm/°C range), good line/load regulation, and robust performance across a wide supply and temperature range. It usually requires minimal external components (often just a bypass capacitor) and may include short‑circuit protection in some variants.
Typical applications: precision data acquisition, ADC/DAC calibration, instrumentation, and test/measurement equipment.
Package/variant note: BR denotes a RoHS-compliant packaging variant. Exact output voltage, pinout, and electrical specs depend on the specific ADR421BR part; please consult the latest Analog Devices datasheet for the precise nominal voltage, tolerance, temperature coefficient, and recommended usage.
Features
ADR421BR is a precision fixed-output voltage reference. Key features typically include:
- Fixed-output voltage precision for ADC/DAC reference applications
- Low noise and low voltage drift (low tempco)
- Excellent line and load regulation
- Low quiescent current
- Wide operating temperature range
- Short-circuit and over‑temperature protection
- Robust ESD protection
- Pb-free, RoHS-compliant BR package
- Available in compact 8‑lead packages (MSOP/SOIC variants)
- Easy implementation with minimal external circuitry (typically only proper decoupling per datasheet)
Note: exact nominal output voltage and electrical specs vary by device variant; consult the ADR421BR datasheet for precise values.
- Fixed-output voltage precision for ADC/DAC reference applications
- Low noise and low voltage drift (low tempco)
- Excellent line and load regulation
- Low quiescent current
- Wide operating temperature range
- Short-circuit and over‑temperature protection
- Robust ESD protection
- Pb-free, RoHS-compliant BR package
- Available in compact 8‑lead packages (MSOP/SOIC variants)
- Easy implementation with minimal external circuitry (typically only proper decoupling per datasheet)
Note: exact nominal output voltage and electrical specs vary by device variant; consult the ADR421BR datasheet for precise values.
Pinout
- Pin count: 8 pins (8-pin package).
- Function: Precision voltage reference with buffered output (typical 2.5 V reference) for analog circuits (e.g., ADC/DAC references). Requires supply to V+ and returns to GND; Vout provides the buffered reference. The remaining pins are generally no-connects (NC) or unused. For exact pin mapping, refer to the ADR421BR datasheet.
- Function: Precision voltage reference with buffered output (typical 2.5 V reference) for analog circuits (e.g., ADC/DAC references). Requires supply to V+ and returns to GND; Vout provides the buffered reference. The remaining pins are generally no-connects (NC) or unused. For exact pin mapping, refer to the ADR421BR datasheet.
Manufacturer
- Manufacturer: Analog Devices, Inc. (ADI).
- Company type: A multinational semiconductor company specializing in analog, mixed-signal, and digital signal processing ICs, including precision references and sensors.
- Company type: A multinational semiconductor company specializing in analog, mixed-signal, and digital signal processing ICs, including precision references and sensors.
Application
- Calibrating and biasing ADCs/DACs in data-acquisition systems
- Precision instrumentation and measurement equipment
- Medical devices and clinical instrumentation
- Industrial process control and instrumentation
- Benchtop test and calibration gear
- Portable, battery-powered equipment requiring low noise and low drift
- Precision instrumentation and measurement equipment
- Medical devices and clinical instrumentation
- Industrial process control and instrumentation
- Benchtop test and calibration gear
- Portable, battery-powered equipment requiring low noise and low drift
Package
ADR421BR uses an 8-pin small-outline IC package: SOIC-8.
