In the DC-Coupled differential input configuration, the following device register setting is used and the respective input waveform provided to IN1P/M for the full-scale swing. Change the register setting in line 13 and 14 for the different input impedance and common-mode tolerance setting B0_P0_R80 (0x50) and B0_P0_R85 (0x55). The setting and plots below are based on Mode 2 with 10K Ohm input impedance. The external common-mode voltage is set at 2.8V.

Figure 2-9 Differential DC-Coupled Register Setting

Figure 2-10 Differential DC-Coupled Input Swing at -1dBrG (0dBrG = 4Vrms)

A frequency plot of the Dynamic Range with -60dBrG input and SNR with input AC signal shorted to ground are provided here for the supply common-mode setting. A similar plot can be obtained for the other common-mode tolerance.

Figure 2-11 Differential DC-Coupled Dynamic Range at -60dBrG Input

Figure 2-12 SNR with Input AC Signal shorted to GND

Table 2-4 summarizes the performances for the two different common tolerances for differential DC-Coupled mode across input impedance and device variants. Table 2-5 summarizes the performances for hardware pin control devices which supports 5KOhm input impedance only in differential DC-Coupled.