The ASIC is part of a novel DBS system with at least 40 electrodes for steering brain stimulation and brain recording. The ASIC is close to the electrodes, not part of the IPG/INS. For safety, AC power is transferred to the ASIC through a dedicated DC-AC-DC conversion scheme over the lead cable together with the data. ASIC power consumption is extremely minimized for battery life. The ASIC distributes the stimulation currents to the electrodes with a high compliance voltage. In addition, the ASIC records up to 10 electrodes and can measure the brain impedance (patented). The ASIC is EMC and MRI compatible.
FEATURES
- AC power transfer between IPG and ASIC is based on DC-AC-DC conversion
- High-voltage pulse stimulation on 40-electrodes through a high-voltage switch matrix
- 10 differential sensing channels to record small neurological brain signals (0.1mV – 10mV)
- Ultra-low-power of only 15 uA in stimulation mode
- Recording mode current consumption <10uA
- On-chip brain impedance measurement
- MRI / EMC / ESD compatible
- 0.35um 50V BCD technology