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dc980abf

DEMO MANUAL

DC980A/DC980B

Figure 3. Connecting DC980A/B Boards with VIN Jumper to 12VIN Turret

alternate Dc980a poWerinG methoD

The DC980A board may be powered from the input supply

that powers the DC980B board. This configuration allows

the LTC2970 to make a direct reading of VIN and display

the readback value in the V12_ADC_LTC2970 register in

LTpowerPlay. It requires an external jumper wire. Ensure

thatallpowerisremovedfrombothboards.OntheDC980A

board, move jumper JP7 to the LOCAL position. Place a

jumper wire between the VIN turret of the DC980B and

the 12VIN turret of the DC980A. Note that the LTC2970’s

voltage range is 8V to 15V. Ensure that the DC980B is

powered by a voltage between 8V and 15V. Apply power.

The 12V telemetry register and plot should look like this: