MOD-ADS1256 24 Bit 8 Channel ADC Data Acquisition Module.
Overview:
ADS1256 8 channel 24-bit ADC module mounted TI ADS1256IDB, minimum Power
consumption, high precision ADC chips and 2.5V datum voltage source, using SPI
interface communication protocol, data output rates up to 30ksps, support single-ended
input and differential input.
Feature:
On-board high precision TI ADS1256IDB ADC chips
On-board ADR03 2.5V datum voltage source chips
Data output rates up to 30ksps, nonlinearity is low to ±0.0010%
The module can be configured as either 8 single-ended inputs or 4 differential
inputs
ADS1256 module is suitable for measuring analog voltage within 3V
Module operating voltage is 5V
Dimensions: 61*35*11mm
Interface description:
5V, GND: 5V power input
SCLK, DIN, DOUT, CS: SPI communication Interface
DRDY: ADS1256data be ready output (Active low level)
PDWN: ADS1256 Sync / Turn off the power input (Active low level)
AIN0-AIN7: Analog voltage input, it can be configured as either 8 single-ended
inputs or 4 differential inputs,
(The measured voltage should be shared with the module)
Precautions:
Because the voltage of ADS1256 is 5V, and the measured voltage should be 2V
below the supply voltage,
so the module is then only suitable for measuring analog voltages within 3V.
Testing Methods:
Module provides STC15W and STM32 microcontroller 8-channel serial display
reference program and STC89C52 single-chip 4-channel 1602LCD display reference
program, the STC89C52 Microcontroller + 1602 LCD test method is as follows:
5V, GND connect to DC 5V power supply, SCLK, DIN, DOUT, DRDY, CS connect to
Microcontroller P1.2, P1.3, P1.4, P1.5, P1.6 respectively,
AIN0, AIN1, AIN2, AIN3 connect to 2.5V, 2.5V, 2.5V,2.5V respectively (The
measured voltage should be in common with the ADS1256),
then 1602 LCD will shows these four sets of voltage values, in which, the 1st
,2nd ,4th sets are single-ended input voltage value of AIN0, AIN1, AIN3, and
the 3rd set is the difference of AIN2-AIN3, the voltage values of these four
sets are 2.5V, 2.5V, 0V, 2.5V.
For this example, you will have to download the ADS1256.h and ADS1256.cpp libraries (https://github.com/adienakhmad/ADS1256). The module has a 7.68 MHz quartz resonator, so we indicate this in the clock MHZ variable and in the vRef variable we indicate the reference voltage, it should be 2.5 volts.
Sample code in attachment tab.
WARNING
