What is the latency from writing to SETUP register (bit3) to enable or disable the burnout current sources and the connection/disconnection of the sources to the ADC +/- inputs?
Is the PGA gain effected when the burnout currents sources (bit 3 of SETUP register) are enabled or disable if the same GAIN value is not changed (bit 2-0 are not changed)?
The actual latency of the command will be in nano seconds for the register to latch from the last falling edge of SCLK of the register write command. As far as the analog latency for startup is concerned, I'm not able to find any characterization data. It should not take long for the circuit to bias up. What may be of larger concern is settling time which will be determined by the current path and any associated capacitance. If the sensor is high impedance, you will also see some offset associated with the measurement results.
The gain will remain constant whether the burn out sources are on or off. As I mentioned earlier, offset could be an issue as this error will be gained up as well as the sensor signal.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.