Part Number: ADS1147 Hi, I am a beginner and is involved in a board testing and I came across the ADS1147 IC (ADC with PGA-20 pin) where the REFP0 and REFN0 are not connected, instead the VREFOUT is connected to ground through a 10 uF capacitor.( from the datasheet I found that in 1147 we can internally set the REF, may be this is used for that,IDK).VREF is also connected to ground. AVDD,DVDD is 3,3V and AVSS is 0v. The input coming from a Load Cell and is connected to AIN0 and AIN1, It is about 1.86 but is having a mV range difference between the two. The problem is that voltage at VREFOUT and DOUT is showing only in mV range .From datasheet I found it should a minimum of 0.5V. The output from this IC is needed in serial communication by SPI. (DOUT of 1147 to MISO, DIN of 1147 to MOSI). The SCLK and nCS are showing the required signals.Is there any need for any enabling of any pins? Can anyone suggest what may be the problem. Thanks in advance.
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