The TLV5623CD is a high-frequency device, so it's essential to follow good PCB layout practices to minimize noise and ensure signal integrity. Place the device close to the power supply, use short traces, and avoid vias under the device. Also, ensure that the analog and digital grounds are separated and connected at a single point.
The internal oscillator's frequency variation with temperature can be handled by using an external clock source or by using a crystal oscillator. If an internal oscillator is used, the frequency variation can be calibrated out using the CAL pin. Additionally, the device's internal temperature sensor can be used to monitor temperature and adjust the oscillator frequency accordingly.
The recommended power-up sequence for the TLV5623CD is to first apply the analog power supply (VCCA), followed by the digital power supply (VCCD). This ensures that the analog circuitry is powered up before the digital circuitry, which helps to prevent any potential latch-up conditions.
To ensure that the TLV5623CD is in a known state after power-up, it's recommended to use the POR (Power-On Reset) pin to reset the device. This pin can be connected to a capacitor and a resistor to create a power-on reset circuit, which ensures that the device is reset to a known state after power-up.
The TLV5623CD can drive a maximum capacitive load of 100 pF. Exceeding this limit may cause the device to oscillate or become unstable. If a higher capacitive load is required, an external buffer or amplifier may be needed.
TLV5623CD datasheet
by Texas Instruments
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