REF193GSZ

Overview

The REF193GSZ is a precision micropower low dropout voltage reference from the Analog Devices REF19x series, providing a nominal output of 3.00 V in an 8-lead SOIC package. It features a maximum temperature coefficient of 5 ppm/°C and an initial accuracy of ±2 mV at 25°C. The device operates with a supply current of 45 μA maximum and reduces to 15 μa in sleep mode. Electrical specifications include line regulation of 4 ppm/V and load regulation of 4 ppm/mA at 25°C. It supports short-circuit protection and functions within an extended industrial temperature range of −40°C to +85°C.

Feature Summary

• Utilizes patented temperature drift curvature correction circuitry and laser-trimmed thin-film resistors for high stability.
• Provides stable output voltage with a low dropout characteristic requiring minimal supply headroom.
• Includes a dedicated SLEEP pin that disables the output and significantly reduces supply current consumption.

Applications

• Portable instruments
• ADCs and DACs
• Smart sensors
• Solar powered applications
• Loop-current-powered instruments

Procurement Notes

Verify the specific electrical grade (G) against application requirements, as performance metrics vary by grade. Confirm the package suffix matches the required footprint. Ensure the ordering code corresponds to the desired packaging format. Cross-reference the datasheet revision to confirm all specifications are current before finalizing procurement decisions.

Selection Notes

Select this component when a fixed 3.00 V reference is required with micropower constraints. The G grade offers specific accuracy limits suitable for general instrumentation. Consider the low dropout voltage if the supply rail is close to the output level. Evaluate the sleep mode functionality if power conservation during idle periods is critical for the system design.

Part Context

The REF193GSZ belongs to the REF19x series of precision band gap voltage references manufactured by Analog Devices Inc. This series includes various nominal output voltages such as 2.048 V, 2.50 V, 4.50 V, and 5.00 V. All variants share similar architectural features including micropower operation and low dropout capabilities, differing primarily in their calibrated output voltage levels.

Replacement Considerations

Other members of the REF19x series, such as REF192GSZ or REF195GSZ, may serve as substitutes if different voltage levels are acceptable. Verify that any replacement maintains the required 8-lead SOIC package and compatible thermal characteristics.

FAQ

What is the function of Test Pins 1 and 5 on the REF193GSZ?

Test Pins 1 and 5 are factory test points reserved for in-package Zener zap trimming. They should remain unconnected by the user to ensure proper operation.

How does the REF193GSZ achieve its low temperature coefficient?

It uses a patented temperature drift curvature correction circuit combined with laser trimming of highly stable thin-film resistors to minimize temperature-induced errors.