CT20601 is an ultra-low stand-by current time and voltage reference.
With only one external capacitor of 1uF, the CT20601 generates a precise voltage reference of 1,21V and a clock of 128Hz.
The Voltage Reference is based on a silicon proven CT20106 band-gap IP block that, by means of the coupled oscillator, is switched Ã‚on/off with a certain duty-cycle thatÃ¢â‚¬â„¢s dependent on the maximum ripple sustainable by the application. 3 trimming bits are needed in order to minimise the temperature drift.
The Oscillator has an internal high-ohmicÃ‚calibrated resistors that allows the clock frequency to remain within an accuracy of 1% with a total temperature drift of 300pmm.
The Supply voltage can be as low as 1.6V.
- Time Reference
- Nominal frequency f0 = 128Hz;
- Total current consumption 10nA;
- 7 bits Fab trimming
- Frequency Precision:
- 1% trimmed
- Clock drift 300ppm [-40, +85] o C
- Voltage Reference
- Nominal voltage Vref = 1.21V;
- Total current consumption 10nA
- With 1% ON/OFF cycle
- Startup time = 2msec
- 3 bits Fab trimming
- Low Power Handled Portable Device
- Embedded micro sensors
- Energy Harvesting circuitry
Block Diagram of the Ultra-Low Stand-by current Time/Voltage Reference