What the 2.048 V output and 900 nA quiescent mean for your rail
The ISL60002CIH320Z-TK: The 900 nA typical supply current is the key spec for battery-operated or always-on circuits — the reference's own draw is lower than the leakage of most bypass caps, so it doesn't eat into the sleep budget. Rated for 7 mA output current, it can bias a handful of ADC reference inputs or a precision op-amp front-end without a separate buffer.
Noise performance and drift — the real limits in a precision chain
For a 2.048 V reference feeding a 16-bit ADC with a 3.3 V supply, that noise floor contributes roughly 0.3 LSB peak-to-peak at the converter's full scale — clean enough that the ADC's own noise dominates in most layouts. The 20 ppm/°C drift means the output shifts about 41 µV per degree. Over a 50°C swing in an industrial cabinet, that's about 2 mV of drift — still within the margin for a 12-bit conversion but something to budget in a 16-bit design where the reference error starts eating into the system accuracy budget.
Package, footprint, and sourcing reality
Housed in a standard SOT-23-3 package (TO-236-3 / SC-59), the part is a drop-in for any three-pin series reference footprint. Renesas lists the product status as active and ROHS3 compliant.