Use USB_DAQ to Complete the Calibration of PGA309 EVM

Iven XuFeb. 6th, 2013iven-xu@ti.com

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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

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a) 4-wire voltage output mode

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

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

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a) 4-wire voltage output mode:

Windows 7 Attention

Default GUI Interface6

a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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a) 4-wire voltage output mode:

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b) 3-wire voltage output mode

b) 3-wire voltage output mode:

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c) Current output mode

c) Current output mode:

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• USB DAQ Configuration

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.

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c) Current output mode:

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c) Current output mode:

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c) Current output mode:

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c) Current output mode:

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c) Current output mode:

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c) Current output mode:

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Thanks!

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