ADR280ART-R2

Overview

The ADR280ART-R2 is a 1.2 V band gap core voltage reference manufactured by Analog Devices Inc., housed in a compact 3-lead SOT-23 package. It operates within a supply voltage range of 2.4 V to 5.5 V and supports an industrial temperature range from −40°C to +85°C. The device delivers a nominal output voltage of 1.200 V with a maximum temperature coefficient of 40 ppm/°C across the full operating range. Key electrical specifications include a typical line regulation of 2 ppm/V, a maximum supply current of 16 μA, and a power supply ripple rejection of –80 dB at 220 Hz. Output noise density is specified at 12.5 nV/√Hz.

Feature Summary

• Optimized band gap core design allows users to tailor voltage, current, or transient response using external operational amplifiers.
• High power supply ripple rejection capability designed for applications experiencing heavy dynamic supply variations.
• Ultralow power consumption ensures extended battery life in portable electronics.
• Compact 3-lead SOT-23 package minimizes board space requirements.

Applications

• Data converter references in GSM, GPRS, and 3G mobile station applications
• Analog baseband ICs such as AD6535 requiring stable references during RF power amplifier activity
• Portable battery-operated electronics
• Low voltage converter references

Procurement Notes

Verify the specific ordering suffix to confirm the package type and reel quantity. The ART-R2 designation indicates a 3-Lead SOT-23 package with a standard order quantity of 250 units. Confirm RoHS compliance status if required, noting that 'Z' suffixes denote compliant parts. Ensure the selected variant matches the required thermal and electrical specifications for the target application environment.

Selection Notes

Select the ADR280ART-R2 when a low-cost, ultralow power reference is needed for designs with significant supply fluctuations. Its ability to drive only 100 μA directly necessitates buffering for higher load currents. Consider external op amps to adjust output voltage or improve transient response. Verify that the 2.4 V minimum input voltage aligns with the system's available supply rails.

Part Context

The ADR280 belongs to Analog Devices' family of precision voltage references, specifically optimized for micro-power applications. Unlike many integrated references with fixed outputs, this component provides a raw 1.2 V band gap core. This architecture offers flexibility for customizing performance characteristics through external circuitry while maintaining a small footprint suitable for space-constrained mobile and handheld devices.

Replacement Considerations

Direct pin-compatible replacements within the same package are not explicitly listed in the provided documentation. Designers should evaluate other 1.2 V band gap references from Analog Devices or competitors, ensuring compatibility with the 2.4 V to 5.5 V supply range and verifying that noise and PSRR specifications meet the application requirements.