Forum Post: RE: ADS1248 interfacing msp430g2553 using spi

Hi Bob, 

This is my schematic for RDT 100 - 3 wire I have designed base SBAA201 and I add 2 change analog input 4 - 20mA

(Please visit the site to view this file)

Please help me check.

Question:

1. What is the value range of C5, C6, C7, C8, C9, C10 and R1,R2,R3,R4? Because we don't have exactly value in datasheet.

2.

The register:  IDAC0(Adrr 0Ah) = 00000100 for using current source DACs = 500uA is right?

                         IDAC1(Adrr 0Bh)  = 10001001 for using IEXC1 and IEXC2 for current source is right?

                       For my Schematic, What is the value of PGA gain and the output data rate should I  choise (SYS0 = ?)

3. How can I program for read cycle 3 input in my schematic?

Thanks and best regards,