The AD680 is a bandgap reference that can provide a 2.5 V output from a 4.5 V to 36 V input. It uses an architecture that allows it to operate at very low quiescent current while achieving excellent DC characteristics and noise performance. Excellent initial accuracy and temperature coefficient are achieved by adjusting the highly stable film resistor, resulting in low errors over the entire temperature range. The device has precision DC characteristics, making it ideal for use as a reference for digital-to-analog converters (DACs) that require an external precision reference source. They are also ideal for analog-to-digital converters (ADCs) and often outperform standard on-chip references.
The AD680's quiescent current is lower than many two-pin references, making it recommended for low-power applications such as handheld battery-powered devices.
The AD680's 8-pin package provides a temperature output pin. The output voltage provided by this pin varies linearly with temperature, so the AD680 can be configured as a temperature sensor while providing a stable 2.5 V output.
AD680 is divided into five levels. AD680AN are rated for operating temperatures ranging from -40°C to +85°C and 0°C to +70°C for AD680JN. Both AD680AN and AD680JN are available in 8-pin molded DIP packages. The AD680AR is rated for an operating temperature range of -40°C to +85°C and 0°C to +70°C for AD680JR. Both models are available in an 8-pin small form factor integrated (SOIC) package. The AD680JT is rated for an operating temperature range of 0°C to +70°C and is available in a 3-pin TO-92 package.