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STK672-410C-E Scheda tecnica(PDF) 11 Page - Sanyo Semicon Device |
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STK672-410C-E Scheda tecnica(HTML) 11 Page - Sanyo Semicon Device |
11 / 19 page STK672-410C-E No.A2138-11/19 [Vref (Sets the current that is used as the reference for setting the output current)] (1) Pin circuit type: Analog input (differential amplifier). Input resistance: 200k Ω (2) Function: The input voltage must be in the voltage range from the control system power supply VDD to 2V. Note that there is a resistance component (200k Ω, typical) in this hybrid IC's input and that therefore an input current occurs. If the Vref voltage structure is formed as a resistor voltage divider, that circuit must be designed to take that input current into account. The input current is 12.5 μA (typical). Note that this is the current when Vref is 5V. The input current falls according to the formula shown below when the Vref voltage is below that level. Ios=Vref/(200k+200k) --------- (1) • Input circuit structure 200k Ω 2.5V to DAC Hybrid IC pin 19 200k Ω : ±1% Vref STK672-410C-E 200k Ω Ios=12.5 μA |
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