The TUSS4440 is a highly integrated driver and receiver IC designed especially for ultrasonic transducers operating between the range of 40 KHz to 1 MHz. The TUSS4440 integrates low-side complimentary FETs that can excite a ultrasonic transducer through a transformer. The transformer allows the user to step up the driving voltage to get higher sound pressure level. The The driver stage has flexible and configurable controls set through the SPI interface or through digital input pins that can be driven by an external MCU. The receive stage consists of a logarithmic amplifier receive chain. The logamp enables the TUSS4440 to have a wide dynamic input range. This enables applications where objects with different physical properties must be detected with the same sensor. A key advantage of the TUSS4440 is that it integrates a bandpass filter that can be tuned to the center frequency of the transducer. A demodulated analog output representing the receive echo, the zero crossing of the input signal, and a simple threshold crossing indicator enable a variety of end applications from complex object detection to simple presence detection.