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ADS1263EVM-PDK: Status byte errors

Part Number: ADS1263EVM-PDK
Other Parts Discussed in Thread: ADS1263

Hi 

I am trying to evaluate ADS1263 for my application, my connection is as follows AIN0 -AIN1 used as External reference 4.5V; AIN2-AIN3 used for external bridge connection differential input (with external excitation of 4.5V;  

I get 4 errors every time I run the ADC pro software; ADC1 Low ref fault, PGA negative/positive rail fault, ADC1 input out of range  

Can you please help me how I can fix these errors?; Attached is the register map 

Regards

Vishwa

ADS126x Register Map_StatusByteError.txt
Name	Addr	R/W	Init	Value
ID	0x00	R	-	0x23
POWER	0x01	R/W	0x11	0x13
INTERFACE	0x02	R/W	0x05	0x05
MODE0	0x03	R/W	0x00*	0x10
MODE1	0x04	R/W	0x80*	0x60
MODE2	0x05	R/W	0x04*	0x88
INPMUX	0x06	R/W	0x01	0x23
OFCAL0	0x07	R/W	0x00	0x00
OFCAL1	0x08	R/W	0x00	0x00
OFCAL2	0x09	R/W	0x00	0x00
FSCAL0	0x0A	R/W	0x00	0x00
FSCAL1	0x0B	R/W	0x00	0x00
FSCAL2	0x0C	R/W	0x40	0x40
IDACMUX	0x0D	R/W	0xBB	0xBB
IDACMAG	0x0E	R/W	0x00	0x00
REFMUX	0x0F	R/W	0x00	0x09
TDACP	0x10	R/W	0x00	0x00
TDACN	0x11	R/W	0x00	0x00
GPIOCON	0x12	R/W	0x00	0x00
GPIODIR	0x13	R/W	0x00	0x00
GPIODAT	0x14	**	0x00	0x00
ADC2CFG	0x15	R/W	0x00*	0x48
ADC2MUX	0x16	R/W	0x01	0x01
ADC2OFC0	0x17	R/W	0x00	0x00
ADC2OFC1	0x18	R/W	0x00	0x00
ADC2FSC0	0x19	R/W	0x00	0x00
ADC2FSC1	0x1A	R/W	0x40	0x40

 

  • Hi Vishwanath,

    Thanks for the register map file!

    Is the 4.5V reference connected (or referenced) to the ADS1263EVM ground?
    Either the ground reference is missing or the ADS1263 is not seeing the 4.5V reference voltage.

    I'd be interested to know the absolute voltages at each of the input pins (AIN0 through AIN3), when measured with respect to the EVM ground. You can also verify that the input voltages are withing the PGA's common mode range with this Excel tool: www.ti.com/.../ads126x-calc-tool

    Best Regards,
    Chris