1. Use USB_DAQ to Complete the Calibration of PGA309 EVM Iven Xu Feb. 6 th, 2013 iven-xu@ti.com 1

2. Agenda USB_DAQ and PGA309 EVM overview Calibration principle of PGA309 EVM –Sub-bullet here Three output mode of PGA309 EVM –4-wire voltage output mode –3-wire voltage output mode –Current output mode Multi-Calibration principle of PGA309 2

3. 3 a) 4-wire voltage output mode

4. a) 4-wire voltage output mode: PGA309 EVM Default Configuration 4

5. a) 4-wire voltage output mode: USB_DAQ Board Default Configuration 5

6. a) 4-wire voltage output mode: Windows 7 Attention Default GUI Interface 6

7. a) 4-wire voltage output mode: 7

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11. a) 4-wire voltage output mode: 11

12. a) 4-wire voltage output mode: 12

13. a) 4-wire voltage output mode: 13

14. a) 4-wire voltage output mode: 14

15. a) 4-wire voltage output mode: 15

16. a) 4-wire voltage output mode: 16

17. a) 4-wire voltage output mode: 17

18. a) 4-wire voltage output mode: 18

19. a) 4-wire voltage output mode: 19

20. a) 4-wire voltage output mode: 20

21. a) 4-wire voltage output mode: 21

22. a) 4-wire voltage output mode: 22

23. 23 b) 3-wire voltage output mode

24. b) 3-wire voltage output mode: 24

25. 25 c) Current output mode

26. c) Current output mode: 26 USB DAQ Configuration

27. c) Current output mode: PGA309 EVM Configuration * When we want to use current output mode of XTR117: * we should make sure the configuration of PGA309 is in 4-wire voltage output mode; * Because in 3-wire voltage output mode of PGA309, we should turn on/off the Vs of PGA309. But in 3-wire mode, the one-wire and Vout is connect in one junction, so we cannot use one-wire to control the Vs (turn on/off). * conclusion: is we should use 4-wire voltage output for current output. 27

28. c) Current output mode: 28

29. c) Current output mode: 29

30. c) Current output mode: 30

31. c) Current output mode: 31

32. c) Current output mode: 32

33. c) Current output mode: 33

34. Thanks! 34