4.096 V reference for military-temperature precision chains
For a 16-bit ADC with a 4.096 V reference, one LSB is about 62.5 µV; this reference contributes roughly one-fifth of an LSB of peak-to-peak noise, leaving the rest of the noise budget for the ADC, front-end amplifier, and supply ripple. The 5 ppm/°C drift translates to about 20 µV per degree Celsius at the output — over the full 180°C span of the military range, the output shifts by roughly 3.7 mV, or about 0.09% of the nominal voltage. That is tight enough that a system designer can skip the external trim pot and still hold 12-bit accuracy across temperature.
Supply headroom and output drive
The input voltage range is 4.296 V to 18 V, so the reference needs at least 200 mV of headroom above the 4.096 V output. That 200 mV dropout is typical for a series bandgap reference — it means the reference can run from a 5 V rail with margin, or from a higher unregulated supply if the system already has one. The 10 mA output current rating is enough to drive the reference input of several ADCs or DACs in parallel, plus a small resistive divider for a test point, without an external buffer. The 1.25 mA quiescent supply current is the price paid for that drive capability; in a battery-powered instrument drawing tens of milliamps total, this reference accounts for a few percent of the system power.
The surface-mount package means the reference can be reflow-soldered alongside the rest of the board; no hand-soldering or through-hole assembly is needed.