SLASEH4 November 2023 DAC61401 , DAC81401
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
The VSENSEP pin is provided to enable sensing of the load by connecting to points electrically closer to the load. This configuration allows the internal output amplifier to make sure that the correct voltage is applied across the load, as long as headroom is available on the power supply. The VSENSEP pin is used to correct for resistive drops on the system board, and are connected to VOUT at the pin. In some cases, both VOUT and VSENSEP are brought out through separate lines and connected remotely together at the load. In such cases, if the VSENSEP line is cut, then the amplifier loop is broken. Use a 5-kΩ resistor between the VOUT and VSENSEP pins to maintain proper amplifier operation.
At device start up, the power-on reset circuit makes sure that all registers are at default values. The voltage output buffer is in a Hi-Z state. However, the VSENSEP pin connects to the amplifier inputs through an internal 40-kΩ feedback resistor (Figure 6-2). If the VOUT and VSENSEP pins are connected together, the VOUT pin is also connected to the same node through the feedback resistor. This node is protected by internal circuitry and settles to a value between GND and the reference input.