Table 4 Power measurements of the prototype hardware Footnote
Power measurements of the LDO, MEMS, and OPAMPS are performed with a 4 points measurement on a Hameg HM8112-3 precision multimeter
From: High precision hybrid RF and ultrasonic chirp-based ranging for low-power IoT nodes
Acoustic front-end | Edge-processing | ||||
|---|---|---|---|---|---|
LDO +MEMS | OPAMP 1 | OPAMP 2 | ADC (nRF52)datasheet | Total | |
Active current (μA) | 113.1 | 81.5 | 81.5 | 300 | 576.1 |
Passive current (μA) | 0.03 | 0 | 0 | 1.9 | 1.93 |
Active power (nW) @1 ms | 407.2 | 293.4 | 293.4 | 1080 | 2074.0 |
Passive power (nW) @ 999 ms | 107.9 | 0 | 0 | 6833.2 | 6940.9 |
Total power (nW) | 515.1 | 293.4 | 293.4 | 7913.2 | 9014.9 |