ZHCSDC6D November 2014 – February 2018 AMC7836
PRODUCTION DATA.
The AMC7836 has 21 analog inputs for external voltage sensing. Sixteen of these inputs (ADC_0 through ADC_15) are bipolar and the other five (LV_ADC16 through LV_ADC20) are unipolar. Figure 51 shows the equivalent circuit for the external analog-input pins. All switches are open while the ADC is in the IDLE state.
Figure 51. ADC External Inputs Equivalent Circuit
To achieve the specified performance, especially at higher input frequencies, driving each analog input pin with a low impedance source is recommended. An external amplifier can also be used to drive the input pins.