Hello,
I'am playing with an ADS1234 (it's a 24 bits adc made for load cell) and a load cell. I have already get this working with an ADS1231 chip. (same as ADS1234 but with only one input, the ADS1234 have 4).
The datasheet of the ADS1234 : http://www.ti.com/lit/ds/symlink/ads1232.pdf
The datasheet of the ADS1231 : http://www.ti.com/lit/ds/symlink/ads1231.pdf
With the ADS1234 the RDY pin don't goes low. So I can't read data.
One time yesterday it worked during 5 minutes. But I cant understand why.
Maybe the capacitor ?
I used one like this, of 100nF = 0.1µF
The chip is wired like this :
1 => VDD
2 => GND
3 => GND
4 => NC
5 => GND
6 => GND
7 => GND
8 => GND
9 => CAPACITOR
10 => CAPACITOR
11 => LOAD CELL OUT +
12 => LOAD CELL OUT -
13 => NC
14 => NC
15 => NC
16 => NC
17 => NC
18 => NC
19 => GND
20 => VCC
21 => GND
22 => VCC
23 => GND
24 => GND
25 => GND
26 => VCC
27 => NC or UC SPI SCLK
28 => NC or UC SPI MISO
What I am doing wrong ?
I need to take a global view.
What can I test ?
I have already tried with an another chip, but it don't change anything.
I must be something very stupid ....
Thanks for your help !