Ultra-low-power applications and techniques

• RF powered 900 MHz passive RFID (<10uA all-in)
• ULP delta-sigma ADC with extended counting
• Low quiescent current DCDC converters and regulators
• Ultra low power watchdog clocks
• Subthreshold/weak inversion design
• Current mode AFEs
• System level duty cycling with fast startup PMU
• Power gating, event-triggered digital
• Low-noise switched capacitor circuits
• Ultralow-power circuits: watchdog oscillators, references, energy harvesting, low-noise instrumentation
• 500ppm high-precision, temperature-stable on-chip oscillators (no externals) – read more

Ultra low leakage

• Battery charging chip with self-leakage below 5nA: lower than battery leakage
• Leakage reduction using duty-cycling techniques

Examples

• Sub-10uA brain recording and stimulation ASIC
• 3MHz, 450nA RFID fully integrated clock
• 60nA 1kHz clocks
• 50nA accurate bandgap and current references
• 2uA, 13 bit, 1-2 kSpS current mode DS ADC
• 2uA low noise instrumentation amp (gm-cell, weak inversion)
• 123 fJ/conv, 11b, 2.5 MSps IQ BP multi-bit delta-sigma ADC