Operational Modes; Single-Shot; Continuous-Conversion - sparkfun Qwiic 12-Bit ADC Hook-Up Manual

Current Consumption (Typical)
2
I C Address
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Caution: The absolute, analog input voltage range is (GND - .3V) to (V
higher/lower may damage the ADC chip. If the voltages on the input pins can potentially violate these
conditions, as specified by the datasheet, use external Schottky diodes and series resistors to limit the input
current to safe values.

Operational Modes

The ADS1015 has 2 different conversion modes: single-shot and continuous-conversion with the ability to support
duty cycling. Through these modes, the ADS1015 is able to optimize its performance between low power
consumption and high data rates.

Single-Shot

By default, the ADS1015 operates in single-shot mode. In single-shot mode, the ADC only powers up for ~25μs to
convert and store the analog voltage measurement in the conversion register before powering down. The
ADS1015 only powers up again for data retrieval. The power consumption in this configuration is the lowest, but it
is dependent on the frequency at which data is converted and read.
Duty Cycling
In single-shot mode, the ADS1015 can be duty cycled to periodically request high data rate readings. This
emulates an intermediary configuration between the low power consumption of the single-shot mode and the high
data rates of the continuous-conversion mode.

Continuous-Conversion

In this mode, the ADS1015 continuously performs conversions on analog voltage measurements and places the
data in the conversion register. If the configuration settings are changed in the middle of the conversion process,
the settings take effect once the current process is completed.
Input Multiplexer (MUX)
There are four input measurement channels for the ADS1015, labeled AIN
of those channels operates as the AIN (positive analog input) and AIN (negative analog input) to the ADC.
Depending on the input MUX configuration, the voltage measurements will be either on single-ended inputs or as
differential pairs.
Operating: 150μA to 200μA
Power-Down: 0.5μA to 2μA
0x48 (Default), 0x49, 0x4A, or 0x4B
P
+ .3V); anything slightly
DD
. The input multiplexer controls which
0-3
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