Circuit
General Block Diagram of the Integrated Circuit UCECG
 

The main operation mode of the IC:

bulletPower comsumption: 200 uW (depending upon the number of active channels)
bulletSampling rate: 420 Hz per channel
bullet1.2V min. power voltage
bulletInternal Oscilator at 13.824 Khz
bullet2 - 16 Input Channels (Programable)
bulletSerial Communications - 115.200 Kbps (Programable)
bulletOutput SNR: 50 dB
bulletMaximum Voltage Gain: 60dB
bulletInput Impedance: > 10 MOhm
bulletBandwith: 35 Hz

                                                      

Oscilator
bullet13.824 KHz / 6.912 KHz Internal Oscilator (trimmable)
bulletPosibility of operation with an external xtal oscilator

 
Instrumentation Amplifier
bulletCMRR of 100 dB
bulletDiferential Voltage Gain of 40dB
bulletRain-to-rail within 150mV of the power supply rails

 
Filter Bank
bulletAnti aliasing 1st order passive RC with a gyrator circuit (Fc= 50 Hz)
bulletSwitched capacitor 5th order programable multirate filter with 50Hz notch

 
Programable Gain Amplifier
bulletProgramable gain stage: x1, x2, x5 and x10

 
Low Voltage Low Power ADC
bulletDual-Slope Architecture
bulletMax sampling rate of 6.750 Hz
bullet10 Bit resolution

 
Serial Input
bulletSerial interface - 8 Data Bit / 1 Stop Bit / Parity none / Transmition rate variable -up to 230.400 Bps

 
Serial Output
bulletSerial interface - 8 Data Bit / 1 Stop Bit / Parity none / Transmition rate variable - up to 230.400 Bps
 
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Last actualization 23/09/03