We talked about the two binary states. We also talked about enabling outputs. Effectively this gives a third state called the off or high impedance state. We refer to this as tri-state logic Example: A 5-bit DAC has a current output such that a digital input of produces an output of 10 mA. What will Iout be for a digital input of 11101? Solution: Iout = 10 mA for an input of 2010 ⇒ K = 0.5 mA I’out = 0.5mA x 2910 = 14.5 mA
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