General Description
●The ADC121C021 is a low-power, monolithic, 12-bit, analog-to-digital converter(ADC) that operates from a +2.7 to 5.5V supply. The converter is based on a successive approxima tion register architecture with an internal track-and-hold circuit that can handle input frequencies up to 11MHz. The ADC121C021 operates from a single supply which also serves as the reference. The device features an I2C-compatible serial interface that operates in all three speed modes, including high speed mode (3.4MHz).
●The ADC"s Alert feature provides an interrupt that is activated when the analog input violates a programmable upper or low er limit value. The device features an automatic conversion mode, which frees up the controller and I2C interface. In this mode, the ADC continuously monitors the analog input for an "out-of-range" condition and provides an interrupt if the mea sured voltage goes out-of-range.
●Features
●■ I2C-Compatible 2-wire Interface which supports standard (100kHz), fast (400kHz), and high speed (3.4MHz) modes
●■ Extended power supply range (+2.7V to +5.5V)
●■ Up to four pin-selectable chip addresses
●■ Out-of-range Alert Function
●■ Automatic Power-down mode while not converting
●■ Very small 6-pin TSOT packages
●■ ±8kV HBM ESD protection (SDA, SCL)
●Applications
●■ System Monitoring
●■ Peak Detection
●■ Portable Instruments
●■ Medical Instruments
●■ Test Equipment