Texas Instruments recommends a star-ground configuration for the TLE2021AIDR, with the device placed close to the analog-to-digital converter (ADC) and the analog signal sources. The device should be placed on a solid ground plane, and the input and output traces should be kept short and away from digital signals.
The TLE2021AIDR requires a specific power-up sequence to ensure proper operation. The recommended sequence is to power up the VCC pin first, followed by the VREF pin, and then the analog input signals. This sequence helps to prevent latch-up and ensures that the device operates within its specified parameters.
The TLE2021AIDR can drive a maximum capacitive load of 100 pF. Exceeding this limit can cause the device to oscillate or become unstable. If a larger capacitive load is required, an external buffer or amplifier may be necessary.
To minimize noise and interference, use a solid ground plane, keep the input and output traces short and away from digital signals, and use shielding or guard rings around the device. Additionally, use a low-noise power supply and decouple the VCC and VREF pins with high-quality capacitors.
The TLE2021AIDR has a thermal derating of 13.9 mW/°C above 25°C. This means that the device's power dissipation must be reduced as the ambient temperature increases to prevent overheating and ensure reliable operation.
TLE2021AIDR datasheet
by Texas Instruments
