TLC5620CDG4 datasheet by Texas Instruments

TLC5620CDG4 Frequently Asked Questions (FAQs)

• What is the recommended power-on sequence for the TLC5620CDG4?
  The recommended power-on sequence is to apply VCC first, followed by VREF, and then the digital inputs. This ensures proper device operation and prevents latch-up or incorrect output states.
• How do I ensure accurate DAC output voltages with the TLC5620CDG4?
  To ensure accurate DAC output voltages, it's essential to use a stable and noise-free VREF input, and to decouple the VREF pin with a capacitor to ground. Additionally, the output voltage should be buffered with an op-amp if it's not being used directly with a high-impedance load.
• What is the maximum clock frequency that can be used with the TLC5620CDG4?
  The maximum clock frequency for the TLC5620CDG4 is 20 MHz. Exceeding this frequency may result in incorrect DAC output voltages or device malfunction.
• Can I use the TLC5620CDG4 with a single supply voltage?
  Yes, the TLC5620CDG4 can be used with a single supply voltage, but the output voltage range will be limited to 0 to VCC. If a bipolar output voltage range is required, a dual supply voltage (VCC and VEE) must be used.
• How do I handle the power-down mode of the TLC5620CDG4?
  To enter power-down mode, the PD pin should be pulled low. In this mode, the DAC output is disconnected from the output pin, and the device consumes minimal power. When exiting power-down mode, the PD pin should be pulled high, and the device will return to normal operation.