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ADS124S06: ADS124S06 design help

Part Number: ADS124S06
Other Parts Discussed in Thread: MSP430F5438A

Hi Team,

A customer have a problem on ADS124S06.

For ADS124S06. When START is low, if I use "ADS124_ReadReg(ADS124_REG_ID, ADS124_RegList, ADS124_REG_MAX);"

to read registers, then power current increases about 20mA and can't down after SPI communication. But When START is High, 

power current only increases during SPI communication .

So what's the problem? And why during SPI communication power current increases about 20mA? it's so big for a low-power ADC. 

Mcu is MSP430F5438A.

BTW, customer wanna post thread in E2E forum, his TI account is company email, but he have limited access on post thread,

is there anyone can open his access?