ZHCSJS8 May 2019 ADS7138
ADVANCE INFORMATION for pre-production products; subject to change without notice.
The ADS7138 is a small, eight-channel, multiplexed, 12-bit, analog-to-digital converter (ADC) with an I2C-compatible serial interface. The eight channels of the ADS7138 can be individually configured as either analog inputs, digital inputs, or digital outputs. The device includes a digital comparator with a dedicated alert pin that 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 the manual mode for reading ADC data over the I2C interface or in autonomous mode for monitoring the analog inputs without an active I2C interface.
The device features a programmable averaging filter that outputs a 16-bit result for enhanced resolution.
The I2C serial interface supports standard-mode, fast-mode, fast-mode plus, and high-speed mode. The device also features an 8-bit cyclic redundancy check (CRC) for the serial communication interface.