ADR280: 1.2 V Ultralow Power High PSRR Voltage Reference

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.

In addition to mobile stations, the ADR280 is suitable for a variety of general-purpose applications. Most band gap refer-ences include internal gain for specific outputs, which simplifies the user’s design, but compromises on the cost, form factor, and flexibility. The ADR280, on the other hand, optimizes the band gap core voltage and allows users to tailor the voltage, current, or transient response by simply adding their preferred op amps.

The ADR280 operates on a wide supply voltage range from 2.4 V to 5.5 V. It is available in compact 3-lead SOT-23 and SC70 packages. The device is specified over the extended indus-trial temperature range of -40°C to +85°C.

产品应用领域 Applications

List GSM, GPRS, 3G mobile stations
Portable battery-operated electronics
Low voltage converter references
Wireless devices

ADR280 特点

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

ADR280 功能框图

ADR280 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
ADR280AKSZ-R2	量产	3 ld SOT-23	3	工业
ADR280AKSZ-REEL7	量产	3 ld SOT-23	3	工业
ADR280ART-R2	量产	3 ld SOT-23	3	工业
ADR280ART-REEL7	量产	3 ld SOT-23	3	工业
ADR280ARTZ-R2	量产	3 ld SOT-23	3	工业
ADR280ARTZ-REEL7	量产	3 ld SOT-23	3	工业