BIOSEMI

Specifications for biopotential measurement systems, type Mark-8:



 
Sample-rate options:  2048 Hz 4096 Hz 8192 Hz
Max. number of channels @ selected sample rate: 128 64 32
Bandwidth (-3dB): DC.. 400 Hz  DC..800 Hz DC..1600 Hz
Low-pass response: 4th order Bessel
Digitalization: 16 bit, one converter per channel
Sampling skew: < 20 ps
AC quantization-resolution (0.3 Hz .. LP cutoff freq.): 500 nV/bit
DC quantization resolution (DC.. 0.01 Hz):  16 µV/bit
Quantization resolution accuracy: 1 %
DC offset: < 70 µV with unequalized output, < 2 mV with software equalizer
(< 0.2 % of full scale)
Quantization noise: 0.2 µV RMS
Amplifier voltage noise: 0.7 µVRMS 0.8 µVRMS 1.0 µVRMS
Amplifier current noise: < 30 fArms
1/f noise (Ze < 1 M):  2 µVpk-pk @ 0.1..10Hz
Total input noise (Ze < 10 k): 0.7 µVRMS (4 µVpk-pk) 0.8 µVRMS (5 µVpk-pk) 1.0 µVRMS (6 µVpk-pk)
Input bias current: < 30 pA per channel
Input impedance: > 100 M @ 50 Hz (1012 // 16 pF)
AC input range (0.3 Hz..LP cutoff freq.) 33 mVpk-pk (16 bits)
AC dynamic range (0.3 Hz..LP cutoff freq) : 78 dB 76 dB 75 dB 
DC input range (DC.. 0.01 Hz): +/- 500 mV (21 bits)
Distortion: < 0.1 %
Common Mode Rejection Ratio: > 150 dB @ 50 Hz
Isolation Mode Rejection Ratio: > 160 dB @ 50 Hz
Supply current per channel: 4 mA 7 mA 12 mA
Back-up battery capacity (6V sealed, lead-acid): 4500 mAh
Battery charge time (with external fast charger): 3.5 hours @ 100 % charge
Power box (safety isolation and back-up battery): 11..13 VDC in; 6.8 VDC out
Mains adapter:  85..264 VA, 50/60 Hz in; 12 VDC out (SELV)
Leakage current, normal operation: < 1 µA rms
Leakage current, single fault : < 10 µArms @ 220 VAC
Trigger inputs: 8 inputs on optical receiver (isolated from subject section) , TTL level 
Size of front-end, including power-box (H x W x D): 118 x 138 x 190 mm for up to 64 channels
141 x 138 x 190 mm for 64..128 channels
Price (incl. mains adapter, fast charger, PCI interface card, 
and basic software programmed in LabVIEW):
EURO 12,000.- + 200,- per channel (excl. VAT)
Warranty: 3 years