The AD587KRZ-REEL7 is a precision 10V series voltage reference from Analog Devices, built on a buried-Zener architecture for low noise and tight initial accuracy.
Tolerance and drift — the BOM decision
The ±0.05% initial accuracy is the headline spec that separates this KRZ variant from the AD587JRZ-REEL (which carries ±0.1% tolerance and 20ppm/°C drift). If your design needs a 10V reference with tighter than 0.1% initial error and half the temperature drift, the KRZ is the correct BOM line. The 10ppm/°C coefficient means the output shifts less than 0.7 mV over the full 0°C to 70°C range — enough headroom for a 16-bit ADC reference without extra calibration.
No exposed pad, so thermal management is straightforward — just ensure the board copper carries the 4 mA supply current and the 10 mA output load without excessive heating.