ADR318ARJZ-REEL7

Overview

The ADR318ARJZ-REEL7 is a precision 1.8 V band gap voltage reference in a 5-lead SOT-23 package. It features an initial accuracy of ±0.27% and a maximum temperature coefficient of 25 ppm/°C over the 0°C to 70°C range. The device operates with a minimum supply headroom of 600 mV, supporting input voltages from (VOUT + 0.6 V) up to 15 V. Quiescent current is 120 μA maximum, reducing to less than 3 μA in shutdown mode. It provides an output current capability of 5 mA.

Feature Summary

• Patented temperature drift curvature correction techniques minimize nonlinearity for high stability.
• Integrated shutdown function allows power reduction to less than 3 μA via TTL/CMOS compatible logic.
• Separate VOUT(SENSE) and VOUT(FORCE) pins enable full Kelvin operation for improved PCB trace accuracy.

Applications

• Battery-powered instrumentation
• Portable medical instruments
• Data acquisition systems
• Industrial process control systems

Procurement Notes

Verify that the ordering suffix 'Z' confirms lead-free compliance as specified in the manufacturer's ordering guide. Confirm the reel quantity matches the required production volume, noting the standard packaging is 3,000 units per reel. Ensure the component grade corresponds to the industrial temperature range of 0°C to 70°C rather than extended ranges.

Selection Notes

Select this component when a fixed 1.8 V reference is required with low dropout characteristics. The separate sense and force pins are critical for applications utilizing long or thin PCB traces to maintain precision. The shutdown pin must be utilized if power conservation is necessary; otherwise, it should be connected to VIN.

Part Context

This part belongs to the ADR318 series of precision voltage references manufactured by Analog Devices. It utilizes patented curvature correction to achieve low drift performance within a compact surface-mount footprint. The device is designed specifically for low-power, battery-operated environments requiring stable regulation without complex external circuitry.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

FAQ

How does the ADR318 handle ground noise?

The internal architecture references the band gap voltage to the output rather than ground, which greatly attenuates noise present on the ground line from appearing on the VOUT terminal.

What is the recommended configuration for the SHDN pin if shutdown is not used?

If the shutdown feature is not utilized, the SHDN pin should be connected directly to the VIN pin to ensure normal operation.