Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage Reference

The MAX873/MAX875/MAX876 precision 2.5V, 5V, and 10V references offer excellent accuracy and very low power consumption. Extremely low temperature drift combined with excellent line and load regulation permit stable operation over a wide range of electrical and environmental conditions. Operation for the MAX873 is guaranteed with a +4.5V supply, making the part ideal in systems running from a +5V ±10% supply. Low 10Hz to 1kHz noise—typically 3.8µVRMS, 9µVRMS, and 18µVRMS, respectively, for the MAX873, MAX875, MAX876—make the parts suitable for 12-bit data-acquisition systems.

A TRIM pin facilitates adjustment of the reference voltage over a ±6% range, using only a 100kΩ potentiometer. A voltage output proportional to temperature provides a source for temperature compensation circuits, temperature warning circuits, and other applications.

Applications

* 12-Bit ADCs and DACs * Digital Multimeters * Low-Power Test Equipment * Portable Data-Acquisition Systems

* MAX873/MAX875/MAX876

* +2.5V/+5V/+10V Outputs

* ±1.5mV/±2.0mV/±3.0mV (max) Initial Accuracy

* 7ppm/°C (max) Temperature Coefficient

* 450µA (max) Quiescent Current

* Low Noise: 3.8µVP-P (typ at 2.5V)

* Sources 10mA, Sinks 2mA

* 15ppm/mA Load Regulation (max)

* 4ppm/V Line Regulation (max)

* Wide Supply Voltage Range, +4.5V to +18V (MAX873)

* TEMP Output Proportional to Temperature