GXSC GX8684 can replace the AD8684 in the application of communication receivers

Communication receiver receiving process is to receive their own small signals in space, and then after amplification, mixer role makes the received signal downconversion to our designated channel, after channel filtering, downconversion transformed to the baseband signal for ADC sampling, the need for a SAR-type 16-bit ADC data acquisition system, the GXSC GAD8684 to meet the sampling needs of the above system, can be a direct replacement for the ADI AD8684. GXSC GAD8684 can meet the sampling requirements of the above system and can directly replace ADI‘s AD8684.

GX8684 is a 16-bit 500kSPS four-channel ADC, the chip provides integrated analog front-end circuitry for each input channel, over-voltage protection of up to ± 20V, 4.096V reference voltage on the chip with low temperature drift. Operating on a single 5V analog supply, each input channel on the device supports true bipolar input ranges of ±10.24V, ±5.12V and ±2.56V, as well as unipolar input ranges of 0V to 10.24V and 0V to 5.12V.

The analog front-end gain of the GX8684 for all input ranges is precisely adjusted to ensure high DC accuracy. Input range selection is software programmable and independent of each channel. Regardless of the selected input range, these devices provide a constant resistive input impedance of 1MΩ.

In addition, the GX8684 has very low noise, eliminating the need for gain reduction or the use of automatic gain control (AGC) in receiver design. The excellent noise performance as well as the SFDR performance fully meets the ADC requirements of communication receivers.