The MAX6069 ultra-low-power shunt references are ideal for space-critical and low-power applications. They are offered in a 4-bump wafer-level package (WLP), and the minimum operating current is guaranteed to be less than 1µA. These references feature low temperature coefficients of less than 20ppm/°C and initial accuracy of better than 0.2%.Available with +1.25V, +2.048V, +2.5V, and 3V output voltages, these references can be used as lower-power, higher-precision upgrades to the ICL8069, LM385, LT1004, and LM4040 in much smaller packages. Two grades are available: A and B. The A grade features a temperature coefficient of 25ppm/°C over the extended temperature range of -40°C to +85°C, with an initial accuracy of 0.2%. Grade B features a temperature coefficient of 50ppm/°C over the extended temperature range of -40°C to +85°C, with an initial accuracy of 0.5%. Their tiny wafer-level packages make these references ideal for equipment with very small form factors.Applications4mA–20mA Loop-Powered SensorsA/D and D/A ConvertersPortable MetersPortable SensorsPrecision Regulators