ADI REF194GP

Overview

REF19x series precision bandgap voltage references use a patented temperature drift curvature correction circuit and laser trimming of highly stable thin film resistors to achieve a very low temperature coefficient and a high initial accuracy. The REF19x series are micropower, Low Dropout Voltage (LDV) devices providing a stable output voltage from supplies as low as 100 mV above the output voltage and consuming less than 45 µA of supply current. In sleep mode, which is enabled by applying a low TTL or CMOS level to the sleep pin, the output is turned off and supply current is further reduced to less than 15 µA. The REF19x series references are specified over the extended industrial temperature range (–40°C to +85°C) with typical performance specifications over –40°C to +125°C for applications such as automotive. All electrical grades are available in 8-Lead SOIC; the PDIP and TSSOP are only available in the lowest electrical grade. Products are also available in die form. Test Pins (TP) The test pins, Pin 1 and Pin 5, are reserved for in-package zener-zap. To achieve the highest level of accuracy at the output, the zener-zapping technique is used to trim the output voltage. Since each unit may require a different amount of adjustment, the resistance value at the test pins will vary widely from pin-to-pin as well as from part-to-part. The user should not make any physical nor electrical connections to Pin 1 and Pin 5.

Initial Accuracy:±2 mV max Temperature Coefficient:5 ppm/"C max Low Supply Current:45 uA max Sleep Mode:15 uA max Low Dropout Voltage Load Regulation:4ppm/mA Line Regulation:4 ppm/V High Output Current:30 mA Short Circuit Protection APPLICATIONS Portable Instrumentation A-to-D and D-to-A Converters Smart Sensors Solar Powered Applications Loop Current Powered Instrumentations

Features

Applications

• Precision data acquisition systems
• High resolution converters
• Industrial process control systems
• Precision instruments
• Notebook Computers
• Cell Phones
• Industrial Process Control
• High-Resolution Analog-to-Digital
• and Digital-to-Analog Converters
• High-Accuracy Reference Standard