The recommended power-up sequence is to apply VDD first, followed by VREF, and then the digital inputs. This ensures that the internal circuitry is properly initialized and avoids any potential latch-up or damage to the device.
To ensure accurate voltage output, it is essential to use a high-precision voltage reference (VREF) and to decouple the VREF pin with a capacitor to reduce noise. Additionally, the output voltage should be buffered with an op-amp to minimize load current and ensure stability.
The DAC7554 can sink or source up to 5mA of output current. However, it is recommended to limit the output current to 2mA or less to ensure accurate voltage output and to prevent overheating of the device.
To implement a voltage output range other than 0-5V, you can use an external amplifier or attenuator circuit to scale the output voltage. For example, you can use an op-amp with a gain of 2 to double the output voltage range to 0-10V.
The DAC7554's performance is affected by temperature, with the output voltage accuracy and linearity degrading at higher temperatures. It is essential to ensure that the device operates within its specified temperature range (-40°C to 125°C) and to consider temperature compensation or calibration if high accuracy is required.
DAC7554IDGSG4 datasheet
by Texas Instruments
