While the TLV232x performs well using dual power supplies (also called balanced or split supplies), the design is optimized for single-supply operation. This optimization includes an input common-mode voltage range that encompasses ground as well as an output voltage range that pulls down to ground. The supply voltage range extends down to 2.7V, thus allowing operation with supply levels typically available for TTL and HCMOS.

Many single-supply applications require that a voltage is applied to one input to establish a reference level that is greater than ground. This virtual ground is generated using two large resistors and a buffer amplifier, such as OPA202.

The TLV232x works well in conjunction with digital logic; however, when powering both linear devices and digital logic from the same power supply, take the following recommended precautions:

• Power the linear devices from separate bypassed supply lines (see Figure 7-1); otherwise, the linear device supply rails potentially fluctuate as a result of voltage drops caused by high switching currents in the digital logic.
• Use proper bypass techniques to reduce the probability of noise-induced errors. Single capacitive decoupling is often adequate; however, RC decoupling is probably necessary in high-frequency applications.