REF195ESZ

Overview

The REF195ESZ is a precision micropower low dropout voltage reference from the Analog Devices REF19x series, housed in an 8-lead SOIC package. It provides a fixed nominal output voltage of 5.0 V with an initial accuracy of ±2 mV maximum and a temperature coefficient of 5 ppm/°C maximum. The device operates within an input voltage range of 5.1 V to 15 V, drawing a maximum supply current of 45 μA under normal conditions. It supports a maximum output current of 30 mA and includes short-circuit protection.

Feature Summary

• Utilizes patented temperature drift curvature correction circuitry and laser trimming for high stability.
• Features a dedicated sleep mode pin that reduces supply current to less than 15 μA when activated.
• Incorporates internal short-circuit protection to safeguard the device during overload conditions.

Applications

• Portable instrumentation
• Analog-to-digital and digital-to-analog converters
• Smart sensors
• Solar powered applications

Procurement Notes

Verify the specific electrical grade (E, F, or G) required for your application, as performance specifications vary by grade. Confirm the package suffix matches the desired form factor, noting that the ESZ designation indicates an 8-lead SOIC package. Ensure compatibility with the system's logic levels for the sleep control pin if power management features are utilized.

Selection Notes

Select this component when a stable 5 V reference is needed with minimal quiescent current consumption. The low dropout characteristic allows operation with supply voltages close to the output level. Consider the extended industrial temperature range suitability for environments requiring reliable performance between -40°C and +85°C.

Part Context

This part belongs to the REF19x series of precision band gap voltage references. The series offers various fixed output voltages including 2.048 V, 2.5 V, 3.0 V, 3.3 V, 4.096 V, and 4.5 V. All devices in the family share similar architectural features such as micropower operation and low dropout capabilities, differing primarily in their nominal output voltage and available packaging options.

Replacement Considerations

Direct functional substitutes within the same series include REF195GSZ and REF195GRUZ, which offer the same 5 V output but in different packages or grades. Other REF19x variants like REF194 or REF196 provide different voltage outputs and should only be considered if the system design allows for voltage adjustment.

FAQ

What is the function of Pin 1 and Pin 5 on the REF195ESZ?

Pin 1 and Pin 5 are test points reserved for factory Zener zapping during the laser trimming process. They should remain unconnected by the user to ensure optimal accuracy.

How does the sleep mode operate on this device?

Sleep mode is enabled by applying a low TTL or CMOS level to the SLEEP pin. This action turns off the output and reduces the supply current to less than 15 μA.