EKM015 ADS1015 4-channel 12-bit AD Converter

Part.no: 41024446

ADC module based around Texas Instruments ADS1015, 4-channel 12-bit I2C AD-converter with programmable gain amplifier (PGA) and comparator.

The module exposes all pins, adds two QWIIC connectors for easy wiring and contains all neccesary supporting components. Example code and libraries for Arduino and Raspberry Pi makes it easy to use.

To reduce interference, both AV+ and AGND are filtered with ferrite beads and capacitors. The SDA, SCL and INT lines are pulled to V+ with 10k resistors. Cut the solder jumpers on the rear to disable the pullup resistors.

ADS1015 features four input channels that can be used either as four independent, single-ended channels or two differential channels. The PGA can amplify small signals to improve the digital resolution.

Functions

Add four analog inputs to any I2C capable host
Integrated PGA, comparator and voltage reference
12-bit resolution
Easy to connect using QWIIC

Specifications

Supply voltage: 2 - 5.5 VDC
Current consumption: 150 uA
Resolution: 12 bits
Sample rate: 128 - 3300 smp/s
Full-scale range: ±0.256 - ±6.144 V
I2C address: 0x73 (default) / 0x72, 0x74, 0x75
Dimensions: 25 x 20 mm
Mounting holes: c-c 20 x 15 mm / ø2.5 mm

Connections

Voltage supply and I2C

All connections for I2C, interrupt, address and voltage supply is lined up nicely for use on breadboards and protoboards.

Two QWIIC connectors on each end provides an easy way to wire up the module.

SCL, SDA, INT and ADR are all pulled to V+ using 10k resistors. SCL and SDA pullups can be disabled by cutting the solder jumpers on the back.

INT (or ALERT/READY) is an active low output that can be used either as a comparator or window comparator that will trigger when a signal falls inside or outside of a set threshold or as a "conversion ready" output that will go low at the end of conversion.

ADR is used for programming the I2C address of the device. The pin can be pulled to V+, GND, SCL or SDA, for a maximum of four devices on the same I2C bus. Default address (10k to V+) is 0x72. To change the address, simply bridge ADR to GND, SDA or SCL.

Connect to      I2C Address 
GND             1001000 (0x72)
V+              1001001 (0x73) / default
SDA             1001010 (0x74)
SCL             1001011 (0x75)

Analog connections

All the analog pins of the ADC are lined up on the opposite side and has the four input channels (IN0 - IN3) and filtered connections for GND (AGND) and V+ (AV+).

Use AGND as the negative reference for single-ended signals. AV+ can be used as the positive reference when wiring up potentiometers. Please note that the current output is very limited and cannot be used to power additional circuitry.

When using the ADC to read differential signals, IN0 and IN1 becomes IN0+ and IN0- while IN2 and IN3 becomes IN1+ and IN1-.

Full scale readings depend on the gain of the internal PGA and can be programmed from ±256mV to ±6.144V. See datasheet for more details.