Texas Instruments recommends a star-ground configuration, with the analog and digital grounds separated and connected at a single point. Additionally, place the TLV0831CD close to the analog signal sources, and use a ground plane to reduce noise and electromagnetic interference (EMI).
When the input voltage is close to the supply voltage, the output voltage swing may be reduced. To handle this, consider using an external op-amp to amplify the output signal, or use a voltage follower to buffer the output. Alternatively, consider using a different ADC with a wider input range.
The recommended clock frequency for the TLV0831CD is between 1.5 MHz and 4 MHz. A higher clock frequency reduces the conversion time but increases power consumption. A lower clock frequency increases the conversion time but reduces power consumption. The optimal clock frequency depends on the specific application requirements.
The internal reference voltage of the TLV0831CD has a temperature coefficient of approximately 20 ppm/°C. To handle this, consider using an external reference voltage with a lower temperature coefficient, or use a temperature compensation circuit to adjust the reference voltage. Alternatively, use a ratiometric measurement technique to minimize the effect of the reference voltage temperature coefficient.
The recommended input impedance for the TLV0831CD is between 1 kΩ and 10 kΩ. A higher input impedance can lead to increased noise and reduced accuracy, while a lower input impedance can lead to increased power consumption and reduced bandwidth. The optimal input impedance depends on the specific application requirements.
TLV0831CD datasheet
by Texas Instruments
