Voltage reference, fixed, 2.5 V, ± 10ppm / °C, SO-8

Precision Micropower, Low Dropout Voltage References

Description
The REF19x series precision band gap 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 high initial accuracy. The REF19x series is made up of micropower, low dropout voltage (LDV) devices, providing 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 an 8-lead SOIC package; the PDIP and TSSOP packages are available only in the lowest electrical grade.

TEST PINS
Test Pin 1 and Test 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. Because each unit may require a different amount of adjustment, the resistance value at the test pins varies widely from pin to pin and from part to part. The user should leave Pin 1 and Pin 5 unconnected.

Features
- Temperature coefficient: 5 ppm/°C maximum
- High output current: 30 mA
- Low supply current: 45 µA maximum
- Initial accuracy: ±2 mV maximum1
- Sleep mode: 15 µA maximum
- Low dropout voltage
- Load regulation: 4 ppm/mA
- Line regulation: 4 ppm/V
- Short-circuit protection

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