The low-power low-noise ASIC includes 3 differential bio-potential channels and one bio-impedance measurement channel to measure body impedance variation due to respiration. Fully configurable digital filtering and processing blocks and lead-off check and pacemaker detection blocks are also embedded in the ASIC, together with right leg driver, shield driver and Wilson common terminal blocks, making it ideal for (battery-operated) ECG systems.
FEATURES
- 3 differential bio-potential channels (up to 10 kHz)
- 1 body-impedance measurement channel
- embedded pacemaker pulse detection
- fully integrated high-pass filter to remove half-cell DC values (0.6V)
- 5uV absolute accuracy @ mV input-range
- low supply voltage: 1.62 V to 3.6 V
- maximum flexibility due to input connection circuit matrix
- configurable band-pass filters
- IQ impedance demodulation
- DC and AC lead-off detection
- Right leg driver (RLD), low 1/f-noise Wilson common terminal (WCT) and shield driver (SD)
- Less than 1 mA/channel at maximum bandwidth and maximum resolution
- SPI daisy chain to connect 4 ICs in parallel
- EMI tolerant
- 6x6mm 40-lead LGA
- 0.13um CMOS
Chip layout
