Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the analog and digital signals separate. The analog input traces should be short and direct, and the digital output traces should be routed away from the analog inputs. Additionally, decoupling capacitors should be placed close to the power pins to reduce noise.
The TLV1548CDB does not require calibration. It has an internal calibration circuit that sets the gain and offset of the ADC. However, the user can perform a system-level calibration by applying a known input voltage and adjusting the digital output to match the expected value.
The maximum sampling rate of the TLV1548CDB is 40 kHz. To achieve this rate, the user should use a clock frequency of 640 kHz or higher, and ensure that the conversion time is set to the minimum value of 1.5 μs. Additionally, the user should minimize the time spent on other tasks during the conversion process to maximize the sampling rate.
The TLV1548CDB has internal overvoltage protection on the analog input pins, which can withstand voltages up to 16 V. However, it is still recommended to use external protection circuitry, such as voltage dividers or clamping diodes, to prevent damage to the device in case of overvoltage conditions.
Yes, the TLV1548CDB can be used in a multiplexed configuration. To do this, the user should connect multiple analog input signals to the input pins, and use the channel select pins to select the desired input channel. The user should also ensure that the input signals are properly buffered and isolated to prevent crosstalk and noise.
TLV1548CDB datasheet
by Texas Instruments
