REF195FSZ

Temperature Coefficient:	10ppm/°C
Base Part Number:	REF195
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Current - Supply:	45µA
Voltage - Input:	5.1 V ~ 15 V
Noise - 10Hz to 10kHz:	--
Noise - 0.1Hz to 10Hz:	50µVp-p
Series:	REF19
Tolerance:	±0.1%
Current - Output:	30mA
Voltage - Output (Min/Fixed):	5V
Output Type:	Fixed
Reference Type:	Series
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tube

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Introduction

The REF195FSZ voltage reference, part of Texas Instruments’ REF195 family of products, is a precision voltage reference IC designed to accurately provide a stable output voltage in a variety of applications. The REF195FSZ is offered in both 6-pin SC-70 and 8-pin SOIC packages with the option to choose between an SOIC-8E or an SC-70-6 small outline package with 28-lead TSSOP. This highly precise voltage reference is accurate to 1.5mV with temperature coefficients as low as +25ppm/oC.

Application Field

REFFSZ voltage reference finds its applications mainly in instrumentation and digital circuitry designs where an ultra-low temperature and power drift is required. These voltage references are precision voltage references for use in many different types of applications, like precision voltage reference for analog-to-digital converters, power supervisory circuitry, current sensing and bias applications, port protection in consumer products, and other areas requiring low-temperature stability and a low-power or low-noise voltage reference.

Features of REF195FSZ Voltage Reference

The REF195FSZ voltage reference has a number of features, including:• Low operating current (5mA) and low quiescent current (5uA typical)• +1.0V to +5.0V output voltage range• ±2.5mV Output Voltage Stability• Low temperature coefficient of +25ppm/oC• Low input offset voltage (+50uV)• Fast settling time (15us)• Low ground clearance voltage (0.5V)• Over-voltage protection• EMI protection• Split-rail operation capability

Working Principle

The REF195FSZ voltage reference is designed based on a bandgap reference structure which serves as the foundation for a high-accuracy and low-noise voltage reference. The bandgap reference design provides a stable output voltage that is unaffected by current or voltage changes and offers a high level of accuracy and low-power consumption. The REF195FSZ offers a range of output voltages, from 1.0V to 5.0V, and is designed to meet the stringent requirements of portable or battery-powered systems that require ultra-low operating current, low quiescent current, and low temperature coefficient.The REF195FSZ provides a high level of stability and accuracy, reduced output noise, and excellent over-voltage protection with its low-dropout voltage regulation circuitry. The over-voltage protection feature protects the device against any potential damage due to over-voltage conditions by automatically shutting down the output voltage if it is too high. The REF195FSZ also offers improved EMI rejection and reduced output noise with a high-capacitance filter design.In addition to its other features, the REF195FSZ is designed using advanced CMOS architecture, allowing it to achieve split-rail operation capability. This feature allows the device to provide +/- voltage operation with improved drift and much less susceptibility to errors and noise during split-rail operation. The split-rail feature also allows the device to handle repeated switching between unipolar and bipolar operation modes more efficiently.

Conclusion

The REF195FSZ voltage reference is an ideal choice for potential portable and battery-powered system applications due to its low operating current, low quiescent current and low temperature coefficient. The device is highly accurate and stable (1.5mV) and features low input offset voltage, fast settling time and low ground clearance voltage. The high-capacitance filter design and split-rail operation capability improve system-level performance, and the over-voltage protection increases system reliability.

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