Table 1.
Power consumption of typical wearable devices and Internet of Things (IoT) components.
| Device Device | Voltage | Power Consumption | Ref. |
|---|---|---|---|
| Accelerometers | |||
| Analog, 300 mV/g, ADXL337 | 3.0 V | 900 μW | [16] |
| Digital, 3.9 mg/LSB, ADXL345 | 2.5 V | 350 μW | [16] |
| KX022 tri-axis (*—low power mode) | 1.8–3.6 V | 522 (36*) μW | [17] |
| Temperature sensors | |||
| BD1020HFV −30 °C to +100 °C | 2.4–5.5 V | 38.5 μW | [17] |
| MAX30208 0 °C to +70 °C | 1.7–3.6 V | 241 μW | [18] |
| MCP9700 −40 °C to +150 °C | 2.3–5.5 V | 82 μW | [19] |
| Heart rate monitors | |||
| Samsung Galaxy Gear Neo 2® component | - | ~50 mW | [20] |
| MAX30102 pulse oximetry/heart-rate monitor | 1.8–3.3 V | ˂1 mW | [18] |
| BH1790GLC optical heart rate sensor | 1.7–3.6 V | 720 μW | [17] |
| Blood pressure sensors | |||
| Conformal ultrasonic device | - | ~24 mW | [21] |
| CMOS Tactile Sensor | 5 V | 11.5 mW | [22] |
| 3-Axis Fully-Integrated Capacitive Tactile Sensor | 1.8–3.3 V | 1.2–4.6 mW | [23] |
| Blood glucose monitoring systems | |||
| IoT-based continuous glucose monitoring system | 2.0 V | 1 mW | [24] |
| Continuous glucose monitoring contact lens | ~100 mV | ˂1 μW | [25] |
| Implantable RFID continuous glucose monitoring sensor | 1.0–1.2 V | 50 μW | [26] |
| Microphones | |||
| MEMS microphone, digital, ADMP441 | 1.8 V | 2.52 mW | [16] |
| Electret condenser microphone, KEEG1542 | 2.0 V | 1 mW | [16] |
| MEMS microphone, analog, ICS-40310 | 1.0 V | 16 μW | [16] |
| Pulse oximeter sensors | |||
| Reflective organic pulse oximetry sensing patch | 3.3–5.0 V | 68–125 μW | [27] |
| MAX30102 pulse oximetry/heart-rate monitor | 1.8–3.3 V | ˂1 mW | [18] |
| Ultra-low-power pulse oximeter with amplifier | 5.0 V | 4.8 mW | [28] |
| A/D converters | |||
| AD7684 16-bit SAR 100 kS/s | 2.7–5.0 V | 15 μW | [16] |
| ADS1114 16-bit sigma-delta 0.860 kS/s | 2.0–5.5 V | 368 μW | [16] |
| DS1251 24-bit sigma-delta 20 kS/s | 3.3–5.0 V | 1.95 mW | [18] |
| Signal processors | |||
| MC56F8006 Audio DSP, 16-bit 56800E | 1.8–3.6 V | 4282 μW/MHz | [16] |
| STM32L151C8 High-perf. MCU, 32-bit ARM Cortex-M3 | 1.7–3.6 V | 540 μW/MHz | [16] |
| nRF52832 Bluetooth SoC, 32-bit ARM Cortex-M4 | 1.7–3.6 V | 100 μW/MHz | [16] |
| Wireless communication devices | |||
| RFID 13.56 MHz 860–960 MHz (range: 0–3 m) | 5.0 V | 200 mW | [29] |
| Bluetooth 2.4–2.5 GHz (range: 1–100 m) | - | 2.5–100 mW | [29] |
| MICS 402–405 MHz (range: 0–2 m) | - | 25 μW | [29] |