feature
1.2 V Precision Output Excellent Line Regulation, 2 ppm/V Typical High Supply Ripple Rejection, -80 dB Ultra Low Power Consumption at 220 Hz, Supply Current 16A Maximum Temperature Coefficient 40ppm/°C Maximum Low Noise, 12.5 nV/Hz typical ÷
Operating voltage range from 2.4 V to 5.5 V
Compact 3-Pin SOT-23 and SC70 Package Applications GSM, GPRS, 3G Mobile Station Portable Battery Powered Electronics Low Voltage Converter Reference Wireless Device

Overview The ADR280 is a reference design for a 1.2 V bandgap core reference design with excellent voltage regulation and power supply rejection for dynamic supply data converter specific applications that encounter heavy changes, such as in GSM, GPRS and 3G mobile applications. Devices such as the AD6535, which have an analog baseband IC with on-board baseband and audio codecs, voltage regulators and battery chargers, rely on the ADR280's ability to reject changes in the active RF power amplifier input battery voltage. In addition to mobile stations, the ADR280 is suitable for a variety of general purpose applications. Most bandgap references include internal gain for a specific output, thereby simplifying the user's cost of design, but compromising form factor and flexibility. The ADR280, on the other hand, optimizes the core voltage bandgap and allows users to customize their voltage, current or transient response by simply adding their preferred op amp. The ADR280 operates from 2.4 V to 5.5 V precisely over a wide supply voltage range in compact 3-lead SOT-23 and SC70 packages. The device is specified over the extended -40°C industrial temperature range to 85°C