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TC9400COD Scheda tecnica(PDF) 11 Page - Microchip Technology |
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TC9400COD Scheda tecnica(HTML) 11 Page - Microchip Technology |
11 / 20 page © 2002 Microchip Technology Inc. DS21483B-page 11 TC9400/9401/9402 FIGURE 5-2: VOLTAGE TO FREQUENCY FIGURE 5-3: FIXED VOLTAGE - SINGLE SUPPLY OPERATION R1 910k R4 100k 1 µF D2 5.1VZ R2 910k R5 91k Rp Offset 20k 100k D1 5.1VZ 0.1 µ 100k CREF CINT 1.2k +12 to +15V 10k 10k Output Frequency Digital Ground Analog Ground Input Voltage (0 to 10V) R3 Gain TC9400 11 12 5 3 2 6 7 1 4 14 9 10 8 Threshold Detect Amp Out CREF IIN Zero Adjust GND VREF IBIAS Output Common FOUT/2 FOUT VDD VSS Component Selection F/S FREQ. 1kHz 10kHz 100kHz CREF 2200pF 180pF 27pF CINT 4700pF 470pF 75pF V+ = 8V to 15V (Fixed) 14 8 10k Ω 10k Ω FOUT FOUT/2 10 14 9 100k Ω 0V–10V IIN 180 pF 820 pF 3 5 12 11 7 0.01 µF 2 k Ω 8.2 k Ω 6 2 V2 R2 0.9 R1 0.2 R1 RIN 1M Ω IIN VREF TC9400 Offset Adjust Gain Adjust V+ 10V 12V 15V 1M Ω 1.4M Ω 2M Ω R1 R2 10k Ω 14k Ω 20k Ω FOUT = IIN 1 (V2 – V7) (CREF) (VIN – V2) (V+ – V2) + IIN = RIN (0.9R1 + 0.2R1) 5V 0.01 µF VIN |
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