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AN2859 数据表(PDF) 12 Page - STMicroelectronics |
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AN2859 数据表(HTML) 12 Page - STMicroelectronics |
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12 / 29 page ![]() VSTATE level definition AN2859 12/29 DocID15255 Rev 2 VCC_Min and VCC_Max are respectively the minimum and maximum power supply voltage of the application. XR_Max and XR_Min are the tolerances of the resistors. For example, with 5% resistor tolerance XR_Max and XR_Min are respectively 1.05 and 0.95. VAVF_L_Max and VAVF_L_Min values are fixed by the STCC08 AVF output electrical dispersion at low level with: VAVF_L_Max = VAVF1_L_Max = VAVF2_L_Max = 1 V and VAVF_L_Min = VAVF1_L_Min = VAVF2_L_Min = 0 V Equation 5 ASC1 is on and ACS2 is on. Equation 6 ASC1 is on and ACS2 is on. Equation 7 ASC1 is on and ACS2 is off. Equation 8 ASC1 is on and ACS2 is off. Equation 9 ASC1 is off and ACS2 is on. R_Min R_Max AVF_L_Max R_Min 4 2 R_Max 4 2 AVF_L_Max 0_Max X X · V X · R R X · R R · V V = ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + = V 0 X · R R X · R R · V V R_Max 4 2 R_Min 4 2 AVF_L_Min 0_Min = ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + = R_Min 4 2 1 R_Max 2 1 AVF_L_Max R_Max 4 CC_Max 1_Max X · R R R X · R R · V X · R · V V ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + + ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + + = R_Max 4 2 1 R_Min 2 1 AVF_L_Min R_Min 4 CC_Min 1_Min X · R R R X · R R · V X · R · V V ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + + ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + + = R_Min 4 3 2 R_Max 4 3 AVF_L_Max R_Max 2 CC_Max 2_Max X · R R R X · R R · V .X R · V V ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + + ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + + = |
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