Two members of the TLV246x-Q1 family (TLV2460-Q1 and TLV2463-Q1) feature a shutdown terminal that conserves battery life in portable applications. When the shutdown terminal is tied low, the supply current is reduced to 0.3 μA per channel, the amplifier is disabled and the outputs are placed in a high-impedance mode. To enable the amplifier, leave the shutdown terminal floating or pull the shutdown terminal high. When the shutdown terminal is left floating, take care to ensure that parasitic leakage current at the shutdown terminal does not inadvertently place the operational amplifier into shutdown. The shutdown terminal threshold is always referenced to VDD / 2. As a result, when operating the device with split-supply voltages (for example, ±2.5 V), the shutdown terminal must be pulled to VDD− (not GND) to disable the operational amplifier.
The output of the amplifier with a shutdown pulse is shown in Figure 22, Figure 23, Figure 24, and Figure 25. The amplifier is powered with a single 5-V supply and configured as a noninverting configuration with a gain of 5. The amplifier turnon and turnoff times are measured from the 50% point of the shutdown pulse to the 50% point of the output waveform. The times for the single, dual, and quad are listed in the data tables.