AD7994

The AD7994 is a 4-channel, 10- and 12-bit, low power, successive approximation ADCs with an I²C-compatible interface. The parts operate from a single 2.7 V to 5.5 V power supply and feature a 2 µs conversion time. The parts contain a 4-channel multiplexer and track-and-hold amplifier that can handle input frequencies up to 11 MHz.The AD7994 provides a two-wire serial interface which is compatible with I²C interfaces. The part comes in two versions, AD7994-0 and AD7994-1. Each version allows for a minimum of two different I²C addresses. The I²C interface on the AD7994-0 supports Standard and Fast I²C Interface Modes. The I²C interface on the AD7994-1 supports Standard, Fast and two High-Speed I²C Interface Modes.The AD7994 normally remain in a shutdown state while not converting, and power up only for conversions. The conversion process can be controlled using the CONVST pin, by a command mode where conversions occur across I²C write operations, or an automatic conversion interval mode selected through software control.The AD7994 require an external reference that should be applied to the REF_INpin and can be in the range of 1.2 V to V_DD. This allows the widest dynamic input range to the ADC.On-chip limit registers can be programmed with high and low limits for the conversion result, and an open-drain, out-of-range indicator output (ALERT) becomes active when the programmed high or low limits are violated by the conversion result. This output can be used as an interrupt.PRODUCT HIGHLIGHTS