The ADS1219 24 bit ADC can provide four 12C controlled ADC input channels. These channels can be used as single ended inputs or paired for differential inputs, with sampling rates up to 1kHz. What makes this ADC more powerful is that it has a programmable x1 or x4 gain amplifier that allows you to "amplify" small changes in analog voltage.
ADS1219 can use its own internal 2.048V voltage reference for measurement, or provide its own reference through REFP and REFN tap pads. You can also provide your own VDDA (AVDD) by opening the jumper and connecting the voltage to the VDDA pad. This ADC board has eight address jumpers that allow you to choose one from sixteen unique addresses (0x40 to 0x4F). Through this method, you can connect up to 16 ADCs on the same 12C bus and have 64 ADC channels. The maximum resolution of the converter is 24 bits, corresponding to 244.14nV per count when the gain is x1. At a gain of x4, the resolution per count is 61.04nV. Note: The effective resolution is limited to 20 bits.
Note: The default 12C address of ADS1219 is 0x40. By selecting a jumper, it can be selected within the range of 0x40 to 0x4F.
Product features:
Working voltage (VDD): 2.3V-5.5V (note: when using Qwiic cable for power supply, the working voltage is only 3.3V)
Working temperature: -40 ° C to 125 ° C
Working mode: single trigger, continuous conversion, and shutdown
Analog input:
Four way single ended
Can be configured as one or two differential inputs
Independent reference voltage input
VDDA (AVDD) can also be configured through jumpers and branch pads
resolving power:
Maximum 24 digits, 20 digits valid
LSB size (gain x1): 244.14nV
LSB size (gain x4): 61.04nV
Sampling rate: 20 Hz to 1 kHz
Combination current consumption (typical): 8 μ A-410 μ A
50Hz and 60Hz noise suppression
Configurable input multiplexer
Sixteen configurable 12C addresses:
0x40 - 0x4F
Default value: 0x40
2 Qwiic connection ports
Power indicator light (configurable)
Size: 1 inch x 1 inch
