The Texas Instruments OPA4991IPWR is a dual, high-performance, low-noise, low-offset-voltage operational amplifier (Op Amp) with a rail-to-rail input/output and a 4.5-MHz performance. With a maximum operating voltage of 40-V and a wide temperature range from -40 to 125 °C, this Op Amp provides reliable performance over a wide range of environmental conditions. The integrated protection diodes ensure that the Op Amp is protected against excessive voltages, while internal compensation and precision trimming yield near-zero offset and minimal offset drift over time. The OPA4991IPWR has a ultra-low noise density that and a wide common-mode operating range, enabling a wide variety of audio to low-voltage sensing applications such as calibration systems, data acquisition, portable instruments, and power supplies. It is available in a 8-pin TSSOP-40 package and is RoHS compliant.