The AD7991YRJZ-0500RL7 is a 4-channel 12-bit Analogue to Digital Converter (ADC) with I2C compatible interface that operates from a single 2.7 to 5.5V power supply and features a 1μs conversion time. The track-and-hold amplifier allows each part to handle input frequencies of up to 14MHz and a multiplexer allows taking samples from four channels. It comes in two versions and each version has an individual I2C address. This allows two of the same devices to be connected to the same I2C bus. Both versions support standard fast and high speed I2C interface modes. ADC normally remains in a shutdown state powering up only for conversions. The conversion process is controlled by a command mode, during which each I2C read operation initiates a conversion and returns the result over the I2C bus. When four channels are used as analogue inputs, the reference for the part is taken from VDD and this allows the widest dynamic input range to the ADC.
12-bit ADC with 1μs typical fast conversion time
4 Analogue input channels with reference input
I2C-compatible serial interface supports standard, fast and high speed modes
(EN)
