REF195GPZ

Overview

The REF195GPZ is a precision micropower voltage reference from the Analog Devices REF19x series, featuring a nominal output of 5.0 V with an initial accuracy of ±10 mV (±0.2%). It operates within a supply voltage range of 5.1 V to 15 V and delivers up to 30 mA of output current while consuming only 45 μA of supply current. The device incorporates short-circuit protection and offers a low dropout voltage. It supports a sleep mode that reduces supply current to 15 μA when the SLEEP pin is driven low. The component is specified for operation across an industrial temperature range of −40°C to +85°C.

Feature Summary

• Utilizes patented temperature drift curvature correction and laser trimming for high stability.
• Provides a dedicated SLEEP pin to disable the output and minimize power consumption.
• Includes internal short-circuit protection for enhanced reliability.
• Features test pins reserved for factory Zener zapping adjustments.

Applications

• Portable instrumentation
• Analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
• Smart sensors
• Solar powered applications
• Loop-current-powered instruments

Procurement Notes

Verify the specific electrical grade (E, F, or G) required for your application, as accuracy and temperature coefficient specifications vary by grade. Confirm the package suffix matches your PCB footprint requirements. Ensure the input supply voltage remains within the specified limits to maintain regulation. Check for any recent Product Change Notifications regarding manufacturing site updates.

Selection Notes

Select this component when a stable 5 V reference with micropower consumption is needed. The REF195GPZ is suitable for battery-operated systems due to its low quiescent current and sleep mode capability. Consider the thermal performance if operating near the upper temperature limit. Evaluate the need for external bypass capacitors as recommended in the datasheet for optimal noise performance.

Part Context

The REF195GPZ belongs to the REF19x family of precision band gap voltage references. This series includes various nominal output voltages such as 2.048 V, 2.5 V, 3.0 V, 3.3 V, 4.096 V, and 4.5 V. All members share similar architectural features, including low dropout characteristics and micropower operation, making them interchangeable in terms of functionality but distinct in output voltage selection.

Replacement Considerations

Direct replacements include other REF195 variants like REF195ESZ or REF195GRUZ, depending on the required accuracy grade and package type. Verify that substitute parts meet the same initial accuracy and temperature coefficient specifications for your design.

FAQ

What is the function of Test Pins 1 and 5?

Test Pins 1 and 5 are factory test points used for Zener zapping during the laser trimming process to achieve precise output voltage accuracy. They should remain unconnected in the final application.

How does the sleep mode operate?

The sleep mode is enabled by applying a logic low level (TTL or CMOS compatible) to the SLEEP pin. This turns off the output and reduces the supply current to less than 15 μA.

Is the REF195GPZ available in through-hole packages?

Yes, the REF19x series is available in an 8-lead PDIP package, although this package option is typically limited to the lowest electrical grade.