AD7730: FAQ

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  • AD7730

    Q I have to realize an A/D board with four ADCs (AD7730). The input signals are in 0-10 mV range, and I need at least 14 bits of resolution or greater. I have built an evaluation board to test converters…
  • AD7730 application question re 6-wire loadcell

    Question I have a question related to the AD7730 Bridge Transducer ADC. In our application we need to use both channels to connect two bridges of the same type, and both of the bridges are in a six…
  • AD7730 Internal-zero-scale calibration

    Hi, I am using the AD7730 and i have some problems with the Internal zero-scale calibration. I use the SPI interface to communicate between my uC and the AD converter. I am able to wirte and read from…
  • AD7730: Calibration Coefficient

    Q We have a customer who would like to know how does the Gain Calibration Register influences the conversion results in AD7730. He want to get the calculation formula. A In unipolar mode, the relationship…
  • AD7730: Can't get 24-bit resolution

    Q I can't 24bit resolution from this part at an output data rate of 50Hz. Why? A At an output update rate of 50Hz, you don't have 24bits of resolution available. You can use the noise tables on…
  • AD7730: ESD protection

    Question We are currently using AD7730 in our weighing indicators. The load cell input is connected to the AD7730 inputs with an EMI filter (muRata DSS710), a 330 Ohm serie resistor and a 470 pF cap…
  • AD7730: Increase in resolution

    Question I am currently using your AD7730 parts to interface directly to a 2mV/V strain gauge bridge with an excitation of 5V. We would like to use this type of part for many reasons however, it…
  • AD7730: Matching between different gain steps/stages

    Question There was at least one important question left: How good is the matching between the different gain steps/stages (1,2,4,.. etc.) of the PGA for example in the 7730 or 7714. Concerning this…
  • AD7730: Maximum ratings

    Question I have an AD7730BN part connected to a PC printer port (for develop only) trough a 1K series resistor in SCLK,DIN,DOUT,CS lines. I saw that if I switch-off the AD7730BN power supply I can…
  • AD7730: Parallel port of the PC

    Question AD7730 is directly connected to LPT1 port of a PC. Din -> LPT1 :B0 Clock -> LPT1 :B1 Dout -> LPT1 :SEL INPUT All pins of AD7730 seem well connected. Problem is : 1. We send 32 clocks…

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