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www.analogtechnologies.com

Analog Technologies

ATREF500

High Precision Voltage Reference

Figure 1. The Photos of Voltage Reference ATREF500.

FEATURES

°C

°C~125°C

+10mA and −5mA, Respectively

500mV

APPLICATIONS

This voltage reference can be used in high precision

industrial applications, data acquisition systems, high

resolution ADCs or DACs, optical control circuits, medical

instruments, etc.

DESCRIPTION

The 3-terminal voltage reference features high accuracy,

ultra low noise, and low temperature drift, which is a best

choice for optical applications and high end data acquisition

systems, etc. The output voltage change is ±1μV when the

input voltage, temperature or the output current changes.

Figure 1 shows the photos of voltage reference.

It comes with a curvature-correction circuit and laser-

trimmed thin-film resistors so that a low temperature

coefficient of 1ppm/°C can be achieved. This voltage

reference draws as low as 90μA of supply current and can

source 10mA or sink −5mA of load current. It provides a

supply current that is virtually independent of the supply

voltage and do not need an external resistor, which is better

than those conventional two-terminal references that need an

external resistor. Moreover, this voltage reference is

internally compensated so that no external compensation

capacitor is needed. This helps save valuable board space for

most applications. Its low dropout voltage and low supply

current make these devices ideal for battery-powered and

low voltage systems.

Figure 1 is the photos of this voltage reference. Figure 2 is

the real size top view of the voltage reference showing the

pin names and locations with the actual size. The pin

functions are shown in Table 1.

Figure 2. Pin Names and Locations