The device incorporates two matching 4th-order Butterworth filters with voltage gain control to perform low-pass filtering on quadrature demodulated signals. The cutoff frequency and inband gain are programmable via a standard 3-wire interface. The cutoff frequency can be set between 0.8 MHz and 22.4 MHz and the inband voltage gain can be set between -3 dB and 20 dB. The cutoff frequency value is determined via a 10-bit control word, with smaller step sizes in the lower