4.7 Wilson Center Terminal (WCT)

The Wilson Center Terminal voltage is internally generated by the ADS1298 device. The WCT1 and WCT2 registers provide controls to select any of the eight inputs (CH1P to CH4P, CH1M to CH4M) for routing to the three integrated WCT amplifiers.

The ADS1298ECG-FE is configured for 12-lead ECG inputs, with the limb electrodes connected as shown in Table 2. During EVM power-up, the firmware configures the device to route CH2P, CH2M, and CH3P (RA, LA, LL) to the internal buffers. This configuration generates a signal at the WCT pin equal to (RA + LA + LL)/3. By installing JP16, the WCT is routed to the single-ended channels to achieve the desired signals.