Texas Instruments provides a layout and routing guide in their application note SLAA382, which recommends keeping the analog and digital grounds separate, using a star-ground configuration, and minimizing trace lengths and loops to reduce noise and electromagnetic interference (EMI).
The internal reference voltage of the TLV5638CDRG4 is 2.5V, and it is recommended to use this internal reference for most applications. However, if an external reference voltage is required, it can be connected to the REF pin, but it must be within the specified range of 2.4V to 2.6V, and the internal reference must be disabled by connecting the REFIN pin to GND.
The maximum clock frequency for the TLV5638CDRG4 is 20 MHz, and it determines the conversion rate of the ADC. A higher clock frequency results in a faster conversion rate, but it also increases the power consumption and noise sensitivity of the device.
The TLV5638CDRG4 outputs data in a straight binary format, but it can be configured to output data in a twos-complement format by setting the appropriate bits in the control register. Additionally, the output data can be shifted or scaled using external logic or software to accommodate different formats or requirements.
The TLV5638CDRG4 has a power-on reset (POR) circuit that resets the device's internal registers and logic when the power supply voltage rises above the specified threshold. This ensures that the device starts in a known state and prevents any unexpected behavior during power-up. The POR circuit also resets the device's output pins to a high-impedance state to prevent any output glitches.
TLV5638CDRG4 datasheet
by Texas Instruments
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