The ADS7924 is a four-channel, 12-bit, analog-to-digital converter (ADC) with an
I2C™ interface. With
its low-power ADC core, support for low-supply operation, and a flexible measurement sequencer that
essentially eliminates power consumption between conversions, the ADS7924 forms a complete
monitoring system for power-critical applications such as battery-powered equipment and energy
The ADS7924 features dedicated data registers and onboard programmable digital threshold
comparators for each input. Alarm conditions can be programmed that generate an interrupt. The
combination of data buffering, programmable threshold comparisons, and alarm interrupts minimize
the host microcontroller time needed to supervise the ADS7924.
The four-channel input multiplexer (MUX) is routed through external pins to allow a
common signal conditioning circuit to be used between the MUX and ADC, thereby reducing overall
component count. The low-power ADC uses the analog supply as its reference and can acquire and
convert signals in only 10 µs. An onboard oscillator eliminates the need to supply a master
The ADS7924 is offered in a small 3-mm × 3-mm QFN and is fully specified for operation
over the industrial temperature range of –40°C to 85°C.
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