1 Features
1• Intelligent Monitoring:
– Auto-Sequencing of 4-Channel Multiplexer
– Individual Alarm Thresholds for Each Channel
– Programmable Scan Rate
• MicroPOWER™ Monitoring:
– Four-Channel Scanning:
– Every 1 ms → 25 μW
– Every 10 ms → 5 μW
– < 1 μA of Power-Down Current
– Programmable Interrupt Pin Controls
Shutdown/Wakeup of the Microcontroller
– Auto Power-Down Control
– PWRCON Pin Allows Shutdown of External
Operational Amplifiers
• Wide Supply Range:
– Analog Supply: 2.2 V to 5.5 V
– Digital Supply: 1.65 V to 5.5 V
• Small Footprint: 3-mm × 3-mm WQFN

2 Applications
• Portable and Battery-Powered Systems:
– Medical, Communications, Remote Sensor
Signal Monitoring, Power-Supply Monitoring
• Energy Harvesting

3 Description
The ADS7924 is a four-channel, 12-bit, analog-todigital
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 harvesting
systems.
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 clock.
The ADS7924 is offered in a small 3-mm × 3-mm
WQFN and is fully specified for operation over the
industrial temperature range of –40°C to 85°C.