Table 1.
System performance summary.
| LFP/ECoG Sensing | Inertial Sensor | |||
|---|---|---|---|---|
| Supply Voltage | 1.7–2.2V | Supply Voltage | 1.7–2.2V | |
| Supply Current | 2.5μA/channel | Supply Current | 1μA | |
| Function mode | Time domain/Bandpower | Sensitivity | 125mV/g | |
| Number of Channels | 4 | Dynamic Range | +/−5g | |
| Minimal Detectable Signal | <1μVrms | Noise (X,Y axis) | 3.5 mgRMS (0.1–10Hz) | |
| Noise Spectral Density |
|
Noise (Z axis) | 5 mg RMS (0.1–10Hz) | |
| Bandpower Center Frequency | dc to 500Hz | Nonlinearity | <1% | |
| Bandwidth of Spectral Estimate | 1–20Hz | Shock Survival | >10,000g | |
| CMRR/PSRR | >80dB | Telemetry | ||
| High Pass Corners | 0.5–8Hz | Real-time Uplink | 11.7kbps@175kHz (ISM) | |
| Input Voltage Range | +/−10V | Memory Size | ||
| Algorithm Power | 5μW/channel (typical) | SRAM | 8Mb | |