Analog Devices / Maxim Integrated MAX6226 Voltage Reference

Analog Devices MAX6226 Voltage Reference is an ultra-low-noise, high-precision, low-dropout voltage reference. These voltage references feature curvature-correction circuitry and high-stability, laser-trimmed, thin-film resistors that result in 5ppm/°C (max) temperature coefficients and an excellent ±0.02% (max) initial accuracy. The proprietary low-noise reference architecture produces a low flicker noise of 1.45µV_P-P and wideband noise as low as 75nV/√Hz (2.5V output). This is done without the increased supply current usually found in low-noise references. The wideband noise can be improved to 45nV/√Hz and AC power-supply rejection by adding a 0.1µF capacitor at the noise reduction pin. The MAX6226 series mode reference operates from a wide 2.7V to 12.6V supply voltage range. The load-regulation specifications are guaranteed to be less than 0.25Ω and 0.05Ω for sink and source currents up to 10mA, respectively. These devices are available over the automotive temperature range of -40°C to +125°C.