Ultralow-noise XFET voltage reference provides a 2.500 V nominal output for precision data acquisition and converter applications. The reference operates from a 4.5 V to 18 V input range with 2 V supply headroom and a typical 580 μA quiescent current. B-grade accuracy is specified to ±1 mV with a maximum 3 ppm/°C temperature coefficient, while A-grade versions are specified to ±3 mV and 10 ppm/°C. The output can source up to 30 mA and sink up to −20 mA, and the device is specified over −40°C to +125°C in 8-lead MSOP and narrow SOIC packages.
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| Reference type | XFET voltage reference |
| Output voltage | 2.500V |
| Input voltage range | 4.5 to 18V |
| Supply voltage headroom | 2V |
| Initial accuracy, A grade | ±3mV |
| Initial accuracy, B grade | ±1mV |
| Initial accuracy, B grade | ±0.04% |
| Temperature coefficient, A grade max | 10ppm/°C |
| Temperature coefficient, B grade max | 3ppm/°C |
| Line regulation max | 20ppm/V |
| Load regulation max | 15ppm/mA |
| Output current sourcing | 30mA |
| Output current sinking | -20mA |
| Quiescent current typ | 580µA |
| Quiescent current max | 800µA |
| Voltage noise, 0.1 Hz to 10 Hz | 3.5µV p-p |
| Voltage noise density, 1 kHz | 80nV/√Hz |
| Turn-on settling time | 10µs |
| Long-term stability, 1000 hours | 40ppm |
| Operating temperature range | -40 to 125°C |
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