The common-mode voltage range (CMVR) parameter is important as it allows the user to see the head room or how far away the input common-mode needs to be from the supply. Figure 2-46 shows the CMVR Test Circuit and Figure 2-47 shows the corresponding simulation output. To learn more about CMVR, please refer to the Texas Instruments Precision Labs video series on input and output limitations. This circuit may be simulated by downloading the AN1516 Test Circuits in either TINA-TI™ or PSpice® for TI.