GENERAL DESCRIPTION

The ADR291 and ADR292 are low noise, micropower precision voltage references that use an XFET® reference circuit. The new XFET architecture offers significant performance improvements over traditional band gap and buried Zener-based references. Improvements include one quarter the voltage noise output of band gap references operating at the same current, very low and ultralinear temperature drift, low thermal hysteresis, and excellent long-term stability.

The ADR291/ADR292 family is a series of voltage references providing stable and accurate output voltages from supplies as low as 2.8 V for the ADR291. Output voltage options are 2.5 V and 4.096 V for the ADR291 and ADR292, respectively.

FEATURES

Supply range

2.8 V to 15 V, ADR291

4.4 V to 15 V, ADR292

Supply current: 15 μA maximum

Low noise: 8 μV and 12 μV p-p (0.1 Hz to 10 Hz)

High output current: 5 mA

Temperature range: −40°C to +125°C

Pin-compatible with REF02/REF19x

APPLICATIONS

Portable instrumentation

Precision reference for 3 V and 5 V systems

Analog-to-digital and digital-to-analog converter reference

Solar-powered applications

Loop-current-powered instruments

ADR291ERZ属于集成电路（IC） > 电压基准。亚德诺半导体技术有限公司制造生产的ADR291ERZ电压基准产品属于基准电压源系列，可通过相对较不稳定的电源提供稳定的电势，电压值始终保持恒定，以便在测量、控制和类似应用中用作比较的标准。其功能行为可能与用于大功率调节的线性稳压器相似，但基准电压源器件却不适合用于此类用途。用作比较标准时，若输出电流容量或实际负载电流增大，其性能通常会降低。