CEAD20 device is euromechanical (3U*160) multichannel precise ADC. It may be used as general purpose multichannel ADC and to be embedded in different equipment. The device has optoisolated input and output registers on-board. It gives an opportunity to build simple systems with the single devices. It provides 20 differential inputs or 40 single-wire inputs. You can read a detail description of device in pdf-file.
The device consist of:

- 20(40)-channels ADC;
- 4-channel optoisolated output register;
- 4-channel optoisolated input register;
- CANBUS interface for communication with control computer;
- embedded microcontroller.

    An user can use CEAD20 as general purpose analog-to-digital converter. All devices in network or programmable group of devices may be started by single broadcast message.
   20(40)-channels ADC design is based on delta-sigma ADC chip and analog multiplexers. Actually the device have 24(48)input channels and all of them are identical for programmer. But, four channels have on-board connections. Two channels are connected to on-board temperature sensor output and power supply. Two channels are connected to precise reference source and "zero". These connections are used by microprocessor to implement procedure of "system calibration" which highly improves accuracy of ADC. An embedded microprocessor provides multichannel (from 1 up to 48) measurements or fast measurements of single channel. Measured values may be sent to a control computer or may be stored in on-board memory. Stored values may be sent to a control computer after special request from network. Measurements of all devices in network or programmable group of devices may be started or breaked by single broadcast message.