AD-box

BioSemi

  • $32,400.00
    Unit price per 
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ActiveTwo AD-box...

The ActiveTwo AD-box forms an ultra-compact, low power galvanically isolated front-end (close to the subject) in which up to 256 sensor signals are digitized with 24-bit resolution. These sensors can be Active electrodes but also BioSemi Bufferboxes with normal passive electrodes, as well as a range of additional active sensors measuring parameters like respiration, temperature, force etc. Each AD-box channel consists of a low noise DC-coupled post-amplifier, with a first-order anti-aliasing filter, followed by a Delta-Sigma modulator with an oversampling rate of 64, and a decimation filter with a steep fifth-order cascaded integrator-comb (CIC) filter response and high-resolution 24-bit output. The digital outputs of all the AD converters (up to 256) are digitally multiplexed and sent to the PC via a single optical fibre without any compression or other form of data reduction.

  • Special input stage matched with the output of the new 2-wire Active electrodes.
  • Power supply to active electrodes has auto-shutdown for optimal safety.
  • ADC per channel offers synchronized sampling, no skew, zero-reference principle.
  • 24-bit sampling, 31nV digital resolution with guaranteed no missing codes.
  • Sigma-Delta converter technology for unsurpassed linearity and dynamic range.
  • Configurable/upgradeable number of channels: 8 up to 256 channels.
  • Up to 16 kHz sample rate per channel, user selectable (1.5MByte/sec total throughput).
  • Full DC operation, with input range as large as found in AC designs.
  • Battery power supply with fibre optic link offers optimal interference rejection and subject safety.
  • Low power design: 5-hour battery life for 256 channels, 1 week for 8 channels.


256 channel AD-box with battery

8 channel Amplifier/Converter module


8 touchproofs for EOG,EMG, ECG


Accessories:

Analog Input Box (AIB)-
The standard ActiveTwo AD-box measures signals from electrodes or other sensors connected to the subject. But in some measurements setup, one also needs to measure additional analogue signals from sources that need to be kept isolated from the subject (for example because the sources are mains powered equipment). For these applications, BioSemi offers a sophisticated solution in the form of an extra Analog Input Box (AIB).

AD-box fibre coupled with AIB

AIB

  • Universal high impedance inputs with static protection.
  • Powered by mains or by battery.
  • Input range: +/-1Volt.
  • ADC per channel offers synchronized sampling, no skew.
  • 24-bit sampling, with guaranteed no missing codes.
  • Sigma-Delta converter technology for unsurpassed linearity and dynamic range.
  • 2 kHz sample rate per channel fully synchronised with subject AD-box.
  • Full DC operation, with input range as large as found in AC designs. Fibre optic link offers optimal interference rejection and subject safety

Specifications:

  • Size of front-end, including battery-box (H x W x D:120 x 150 x 190 mm
  • Weight of front-end, including battery-box:1.1 kg
  • Warranty:3 years
  • Low-pass response:5th order cascaded integrator-comb (CIC) digital filter
  • High-pass response: fully DC coupled
  • Digitalization:24 bit, 4th order Delta-Sigma modulator with 64x oversampling,
    one converter per channel
  • Sampling skew:< 10 ps
  • Amplifier current noise:< 30 fArms
  • Channel separation:> 100 dB

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