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AFE159RP4: How to obtain the V1 lead?

Part Number: AFE159RP4

Tool/software:

Hello,

I am currently developing a product using the AFE159RP4. We are utilizing five electrodes: RA, LA, LL, RL, and V1. Each electrode is connected to the following pins:

  • E1: RA

  • E2: LA

  • E3: LL

  • E4: V1

  • E5: RL

Our goal is to acquire three leads: Lead I, Lead II, and V1 using these electrodes.

To configure Lead I on CH1, since Lead I = LA - RA, we have set:
CONNECT_INA_P_ECG_CH1 = EL_IN2 and CONNECT_INA_N_ECG_CH1 = EL_IN1.

For Lead II on CH2, since Lead II = LL - RA, we have set:
CONNECT_INA_P_ECG_CH2 = EL_IN3 and CONNECT_INA_N_ECG_CH2 = EL_IN1.

Finally, for V1 on CH3, since V1 = V1 - WCT, we intended to set:
CONNECT_INA_P_ECG_CH3 = EL_IN4 and CONNECT_INA_N_ECG_CH3 = WCT.

However, we discovered that the AFE159RP4 does not support WCT as a setting for CONNECT_INA_N_ECG_CH3.

Could you please explain why the device does not allow WCT to be assigned to CONNECT_INA_N_ECG_CH3, even though V1 is traditionally calculated as V1 - WCT?
Additionally, could you advise on how we can obtain the V1 lead using the AFE159RP4?

Thank you very much for your support.

Best regards,
Seongbin