3 Switch Timing Capabilities

Figure 3-1 shows the output of the TMUX6234 with a 1 MHz signal on the SEL pin. The pinch-off voltage is the AMC7924 –8-V V_SS supply.

Figure 3-1 TMUX6234 Output Switching Plot

Large capacitors on the DAC and V_SS supplies and a small capacitor on the TMUX output are imperative for fast voltage switching. These large capacitors dump stored current into the smaller output capacitor, enabling the output to quickly charge up to the designed for voltage. Figure 3-2 shows the recommended capacitors for fast switching.

Figure 3-2 Recommended Output Switching Capacitors