GENERAL DESCRIPTION

The ADR280 is a 1.2 V band gap core reference with excellent line regulation and power supply rejection designed specifically for applications experiencing heavy dynamic supply variations, such as data converter references in GSM, GPRS, and 3G mobile station applications. Devices such as the AD6535 that have an analog baseband IC with on-board baseband, audio codecs, voltage regulators, and battery chargers rely on the ability of the ADR280 to reject input battery voltage variations during RF power amplifier activity.

FEATURES

1.2 V precision output

Excellent line regulation: 2 ppm/V typical

High power supply ripple rejection: –80 dB at 220 Hz

Ultralow power supply current: 16 μA maximum

Temperature coefficient: 40 ppm/°C maximum

Low noise, 12.5 nV/√Hz typical

Operating supply range, 2.4 V to 5.5 V

Compact 3-lead SOT-23 and SC70 packages

APPLICATIONS

List GSM, GPRS, 3G mobile stations

Portable battery-operated electronics

Low voltage converter references

Wireless devices