ADR361 Voltage Reference Datasheet, Features, Pinout, and Applications

The ADR361 is a micropower, high-accuracy shunt voltage reference that delivers a 2.5V output with ±0.1% initial accuracy and low temperature coefficient. Designed to operate at supply currents as low as 70 μA, it is suitable for portable, battery-powered, and precision analog systems. The ADR361 can source up to 10 mA and requires no external capacitor for stability.

Overview of ADR361

The ADR361 is a precision 2.500 V band gap voltage reference designed to deliver low power consumption, high accuracy, and exceptional stability in a compact TSOT package. Leveraging Analog Devices, Inc.'s proprietary temperature drift curvature correction technology, the ADR361 achieves an ultralow temperature drift of 9 ppm/°C, ensuring reliable performance across a wide operating temperature range.

Optimized for micropower operation, the ADR361 requires a minimum supply voltage of only 2.800 V (300 mV above its 2.500 V output), enabling efficient use in low dropout (LDO) applications. Its advanced architecture eliminates the need for external compensation capacitors, simplifying board design while reducing both system cost and footprint.

With its combination of low power consumption (ideal for battery-powered systems), small form factor, and robust precision, the ADR361 is exceptionally suited for portable electronics, industrial sensors, data acquisition systems, and other applications demanding stable voltage references in space-constrained environments.

ADR361 Features

Space-Efficient Design
– Available in a compact TSOT package

Excellent Temperature Stability
– Low temperature coefficient across grades:
• A Grade: 25 ppm/°C
• B Grade: 9 ppm/°C
• H Grade: 25 ppm/°C

High Initial Accuracy
– A Grade: ±6 mV max (for ADR360, ADR361, ADR363)
– B Grade: ±3 mV max (for ADR360, ADR361, ADR363)

Low Noise Performance
– Ultralow output voltage noise: 6.8 µV p-p (from 0.1 Hz to 10 Hz)

Efficient Power Characteristics
– Low dropout voltage: 300 mV
– Maximum quiescent current: 190 µA
– No need for external capacitors

Output Drive Capability
– Supports sourcing up to +5 mA and sinking up to −1 mA

Extended Operating Temperatures
– A and B Grades: −40°C to +125°C
– H Grade: −40°C to +150°C

Automotive Qualified Variants
– −40°C to +150°C: ADR365WHUJZ-R7
– −40°C to +125°C: ADR365WAUJZ-R7, ADR366WAUJZ-REEL7

ADR361 Pinout

Pin Configuration

Absolute Maximum Ratings

ADR361 Application

Battery-Powered Instruments

The ADR361 is ideally suited for battery-powered instruments that require precise voltage references without draining the power source. With its low power consumption and high accuracy, it supports extended battery life while ensuring consistent performance. Whether used in handheld measurement tools, portable sensors, or compact monitoring devices, the ADR361 provides a stable voltage reference critical for accurate analog-to-digital conversion, making it a dependable choice for compact and energy-efficient designs.

Portable Medical Instruments

In portable medical devices—such as glucose meters, patient monitoring equipment, and diagnostic instruments—the ADR361 helps maintain reliable measurement accuracy under varying operating conditions. Medical applications demand tight tolerance and low noise to ensure safe and dependable readings. The ADR361’s low drift and compact form factor make it well-suited for integration into devices where size, stability, and power efficiency are crucial for both patient safety and device reliability.

Data Acquisition Systems

Data acquisition systems depend on stable voltage references for precise analog signal processing and conversion. The ADR361 plays a vital role in improving the performance of ADCs and DACs by delivering a constant and low-noise reference voltage. Whether used in laboratory instruments, environmental monitoring equipment, or scientific research setups, the ADR361 enhances data integrity, allowing for high-resolution and accurate measurements in even the most demanding applications.

Industrial Process Controls

In industrial automation and process control systems, where reliability and accuracy are essential for maintaining efficiency and safety, the ADR361 provides a stable voltage reference for sensors, controllers, and monitoring circuits. It is especially valuable in harsh environments where temperature and power variations could compromise less robust components. Its precision output helps ensure accurate feedback and control loops in systems such as flow meters, pressure sensors, and programmable logic controllers (PLCs).

Automotive

The ADR361 is also employed in automotive electronics, where precise voltage referencing is required for engine control units, battery management systems, and sensor interfaces. Designed to operate reliably over a wide temperature range, it is well-equipped for the rigorous demands of vehicle environments. The ADR361 helps maintain measurement accuracy in systems where performance and safety are paramount, supporting the development of both traditional and electric vehicle technologies.

ADR361 Package

The ADR361 is available in a compact 5-Lead TSOT (Thin Small Outline Transistor) package. This surface-mount package offers a small footprint and excellent thermal performance, making it ideal for space-constrained and portable electronic applications that demand precision and efficiency.

ADR361 Manufacturer

The ADR361 is manufactured by Analog Devices Inc., a global leader in precision analog and mixed-signal technology. Analog Devices is renowned for its deep portfolio of voltage reference solutions, signal chain components, and power management ICs used in instrumentation, healthcare, aerospace, industrial automation, and communications.

With decades of experience in precision electronics, Analog Devices is trusted by engineers for its reliable performance, robust testing standards, and long-term product support. The ADR361, like many ADI components, is designed to meet the high accuracy and stability requirements demanded by mission-critical applications, while also offering low power consumption suitable for modern, portable systems.

ADR361 Datasheet

The ADR361 Datasheet offers engineers in-depth technical information, including pin configurations, recommended operating conditions, electrical characteristics, application circuits, and layout guidelines for optimal performance in precision analog systems.

ADR361 vs. Other Voltage References

Conclusion

The ADR361 Voltage Reference is a compact, low-power, high-accuracy reference solution designed for precision analog and data acquisition systems. With tight initial accuracy, low temperature drift, and low current operation, the ADR361 is ideal for portable devices, instrumentation, and control systems that require reliable and stable voltage reference performance. Backed by the expertise of Analog Devices Inc., it offers dependable operation across a wide range of applications.