JAJSHK8 June 2019 ADS7028
ADVANCE INFORMATION for pre-production products; subject to change without notice.
The ADS7028 is a small, eight-channel, multiplexed, 12-bit, 1-MSPS, analog-to-digital converter (ADC) with an enhanced-SPI serial interface. The eight channels of the ADS7028 can be individually configured as either analog inputs, digital inputs, or digital outputs. The device includes a digital comparator which can be used to interrupt the host when a programmed high or low threshold is crossed on any input channel. The device uses an internal oscillator for conversion. The ADC can be used in manual mode for reading ADC data over the SPI interface or in autonomous mode for monitoring the analog inputs without an active SPI interface.
The device features a programmable averaging filter that outputs a 16-bit result for enhanced resolution. The root-mean-square (RMS) module computes a 16-bit true RMS result of any analog input channel over a configurable time window. The zero-crossing-detect (ZCD) module can be used to generate a digital output corresponding to the programmable threshold crossings of any analog input channel.