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LT1790 - Micropower SOT-23 Low Dropout Reference Family

The LT1790 is a family of SOT-23 micropower low dropout series references that combine high accuracy and low drift with low power dissipation and small package size. These micropower references use curvature compensation to obtain a low temperature coefficient and trimmed precision thin-film resistors to achieve high output accuracy. In addition, each LT1790 is post-package trimmed to greatly reduce the temperature coefficient and increase the output accuracy. Output accuracy is further assured by excellent line and load regulation. Special care has been taken to minimize thermally induced hysteresis.

The LT1790s are ideally suited for battery-operated systems because of their small size, low supply current and reduced dropout voltage. These references provide supply current and power dissipation advantages over shunt references that must idle the entire load current to operate. Since the LT1790 can also sink current, it can operate as a micropower negative voltage reference with the same performance as a positive reference.

Features High Accuracy: A Grade—0.05% Max B Grade—0.1% Max Low Drift: A Grade—10ppm/°C Max B Grade—25ppm/°C Max Low Thermal Hysteresis 40ppm (Typical) –40°C to 85°C Low Supply Current: 60µA Max Sinks and Sources Current Low Dropout Voltage Guaranteed Operational –40°C to 125°C Wide Supply Range to 18V Available Output Voltage Options: 1.25V, 2.048V,2.5V, 3V, 3.3V, 4.096V and 5V Low Profile (1mm) ThinSOT™ Package Typical Application

Applications Handheld Instruments Negative Voltage References Industrial Control Systems Data Acquisition Systems Battery-Operated Equipment Packaging