OPA690IDBVT datasheet by Texas Instruments

OPA690IDBVT Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of OPA690IDBVT?
  A good PCB layout for OPA690IDBVT involves keeping the input and output traces short and away from each other, using a solid ground plane, and placing decoupling capacitors close to the device. A 4-layer PCB with a dedicated ground plane is recommended.
• How do I ensure stability when using OPA690IDBVT in a high-gain configuration?
  To ensure stability in high-gain configurations, use a compensation capacitor (Cc) between the output and the inverting input. The value of Cc depends on the gain and bandwidth requirements. A good starting point is 2-5pF. Additionally, ensure that the feedback resistors are matched and the layout is symmetrical.
• What is the maximum power dissipation of OPA690IDBVT, and how do I calculate it?
  The maximum power dissipation of OPA690IDBVT is 1.4W. To calculate the power dissipation, use the formula: Pd = (Vcc x Icc) + (Vout x Iout), where Vcc is the supply voltage, Icc is the quiescent current, Vout is the output voltage, and Iout is the output current.
• Can I use OPA690IDBVT in a single-supply configuration, and if so, how?
  Yes, OPA690IDBVT can be used in a single-supply configuration. To do so, connect the negative supply pin to a voltage divider that sets the midpoint of the supply voltage. This allows the output to swing around the midpoint, enabling single-supply operation.
• How do I protect OPA690IDBVT from overvoltage and ESD?
  To protect OPA690IDBVT from overvoltage and ESD, use a voltage clamp or a transient voltage suppressor (TVS) diode at the input. Additionally, ensure that the PCB layout is designed to minimize ESD exposure, and consider adding ESD protection devices at the input.