A 3-output low-voltage bandgap reference on 0.13um CMOS
An important building block in many systems is the bandgap reference, which contributes to the overall accuracy of the system. ICsense has ample experience with the design of this building block, for various requirements and boundary conditions. As an expert in analog and mixed-signal design, ICsense continuously pushes specifications to the limits of what’s feasible.
One example is an ultra-low power CMOS bandgap reference with multiple output voltages (0.6V - 0.8V - 1.2V). It has excellent PSRR figures and achieves +/-2% accuracy with trimming and +/-4.1% without trimming. It requires no external components. The bandgap reference operates in an analog voltage range of 2.0V to 3.6V and is qualified over a broad temperature range of -40°C to 125°C.
A 5-bit trimming word allows trimming the offset on VREF using a one-points calibration at 25°C (77°F). All digital controlling is done at core voltages in the range 1.02V to 1.32V, eliminating the need for level shifters.
Datasheet: IP section