The ISL21080 analog voltage references feature low supply voltage operation at ultra-low 310nA typical, 1.5μA maximum operating current. Additionally, the ISL21080 family features ensured initial accuracy as low as ±0.2% and 50ppm/°C temperature coefficient. These references are ideal for general-purpose portable applications to extend battery life at a lower cost. The ISL21080 is provided in the industry standard 3 Ld SOT-23 pinout. The ISL21080 output voltages can be used as precision voltage sources for voltage monitors, control loops, standby voltages for low power states for DSP, FPGA, Datapath controllers, microcontrollers, and other core voltages: 0.9V, 1.024V, 1.25V, 1.5V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, and 5.0V.

Special Note: Post-assembly X-ray inspection may lead to permanent changes in device output voltage and should be minimized or avoided. For further information, see “Applications Information” on page 15 of the datasheet and AN1533, “X-Ray Effects on Intersil FGA References”.


  • Reference output voltage: 0.900V, 1.024V, 1.250V, 1.500V, 2.048V, 2.500V, 3.000V, 3.300V, 4.096V, 5.000V
  • Initial accuracy:
    • ISL21080-09 and -10 ±0.7%
    • ISL21080-12 ±0.6%
    • ISL21080-15 ±0.5%
    • ISL21080-20 and -25 ±0.3%
    • ISL21080-30, -33, -41, and -50 ±0.2%
  • Input voltage range:
    • ISL21080-09 2.0V to 5.5V
    • ISL21080-10, -12, -15, -20 and -25. 2.7V to 5.5V
    • ISL21080-30 3.2V to 5.5V
    • ISL21080-33 3.5V to 5.5V
    • ISL21080-41. 4.5V to 8.0V
    • ISL21080-50 5.5V to 8.0V
  • Output voltage noise: 30μVP-P (0.1Hz to 10Hz)
  • Supply current: 1.5μA (max)
  • Tempco: 50ppm/°C
  • Output current capability: ±7mA
  • Operating temperature range: -40 °C to +85 °C
  • Package: 3 Ld SOT-23
  • Pb-Free (RoHS compliant)


  • Energy harvesting applications
  • Wireless sensor network applications
  • Low power voltage sources for controllers, FPGA, ASICs or logic
  • devices
  • Battery management/monitoring
  • Low power standby voltages
  • Portable Instrumentation
  • Consumer/medical electronics
  • Wearable electronics
  • Lower cost industrial and instrumentation
  • Power regulation circuits
  • Control loops and compensation networks
  • LED/Diode supply


Title language Type Format File Size Date
star ISL21080 Datasheet Datasheet PDF 1.24 MB
AN1533: X-Ray Effects on Intersil FGA References Application Note PDF 421 KB
AN1494: Reflow and PC Board Assembly Effects on Intersil FGA References Application Note PDF 267 KB
AN177: Voltage Reference Application and Design Note Application Note PDF 1.39 MB
AN9675: A Tutorial in Coherent and Windowed Sampling with A/D Converters Application Note PDF 503 KB
AN9705: A Theoretical View of Coherent Sampling Application Note PDF 287 KB
PA14035 - Data Sheet Specification Correction for the listed Intersil Products Product Advisory PDF 240 KB
PA10042 - Data Sheet Specification Change for Intersil Product ISL21080* Product Advisory PDF 45 KB
PCN14050 - Fab site change, C5 Technology transfer to Palm Bay from XFAB and Yamaha for the listed products (Vrefs) Product Change Notice PDF 209 KB
PCN10116 - Alternate Manufacturing Site for Assembly of the Listed Intersil SOT23 Packaged Products - Carsem, Ipoh Malaysia (CAM) Product Change Notice PDF 177 KB
Analog ICs Brochure 日本語 Brochure PDF 4.20 MB


Title language Type Format File Size Date
ISL21080xxEV1Z Design Files PCB Design Files ZIP 138 KB

memoryBoards & Kits

Part Number Title Type Company
ISL21080xxEV1Z 300nA Nano Power Voltage Reference Evaluation Boards Evaluation Renesas