DAC Interface Circuit
This “DAC Interface” circuit is a precision buffer amplifier for a DAC output. It is scaled to provide a 10V output @ 10mA with a +1V input voltage. This type of current source can be very useful in industrial interface applications.
A R-R output op amp with an input common-mode range that includes its negative supply rail, such as an OPA251, is required for single- supply operation.
An external NPN transistor is used to off- load the circuit power dissipation from the precision op amp U1. Re- scaling this circuit with other transistors can result in output current capability of a many amps. (Circuit is created by Neil P. Albaugh TI – Tucson)
DAC Interface Circuit:
Online Simulation of the DAC Interface Circuit
The great feature of the TINA circuit simulator that you can analyze this circuit immediately with TINACloud the online version of TINA. Of course you can also run this circuit in the off-line version of TINA.
Click here to invoke TINACloud and analyze the circuit yourself, or watch our tutorial video!
You can send this link to any TINACloud customers and they can immediatelly load it by a single click and then run using TINACloud.
Michael Koltai
www.tina.com