DAC128S085CIMT/NOPB datasheet by Texas Instruments

DAC128S085CIMT/NOPB Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the DAC128S085?
  The recommended power-up sequence is to apply VCC first, followed by VREF, and then the digital inputs. This ensures proper device operation and prevents latch-up.
• How do I ensure accurate voltage output from the DAC128S085?
  To ensure accurate voltage output, it is essential to use a low-noise, low-impedance voltage reference (VREF) and to decouple the VREF pin with a capacitor. Additionally, the output voltage should be buffered with an op-amp if it needs to drive a load.
• What is the maximum output current of the DAC128S085?
  The maximum output current of the DAC128S085 is 5 mA. Exceeding this current may cause the output voltage to droop or the device to overheat.
• How do I handle the digital inputs of the DAC128S085 during power-up and power-down?
  During power-up and power-down, the digital inputs (SCLK, SDIN, and SYNC) should be held in a static state to prevent unwanted device operation. It is recommended to use a pull-up or pull-down resistor to ensure a defined logic level.
• What is the purpose of the SYNC pin on the DAC128S085?
  The SYNC pin is used to synchronize the data transfer between the microcontroller and the DAC. It is an active-low input that, when low, enables the DAC to receive data from the microcontroller.