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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST7LITE1XB датащи(PDF) 142 Page - STMicroelectronics |
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ST7LITE1XB датащи(HTML) 142 Page - STMicroelectronics |
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142 / 159 page  ST7LITE1xB 142/159 ADC CHARACTERISTICS (Cont’d) Notes: 1. Data based on characterization results over the whole temperature range, not tested in production. 2. For precise conversion results it is recommended to calibrate the amplifier at the following two points: – offset at VINmin = 0V – gain at full scale (for example VIN=430mV) 3. Monotonicity guaranteed if VIN increases or decreases in steps of min. 5mV. 4. Please refer to the Application Note AN1830 for details of TE% vs Vin. 5. Refer to the offset variation in temperature below Amplifier output offset variation The offset is quite sensitive to temperature varia- tions. In order to ensure a good reliability in meas- urements, the offset must be recalibrated periodi- cally i.e. during power on or whenever the device is reset depending on the customer application and during temperature variation. The table below gives the typical offset variation over temperature: Symbol Parameter Conditions Min Typ Max Unit VDD(AMP) Amplifier operating voltage 3.6 5.5 V VIN Amplifier input voltage4) VDD=3.6V 0 350 mV VDD=5V 0 500 VOFFSET 1) Amplifier output offset voltage5) VDD=5V 200 mV VSTEP 1) Step size for monotonicity3) VDD=3.6V 3.5 mV VDD=5V 4.89 Linearity 1) Output Voltage Response Linear Gain factor 1) Amplified Analog input Gain2) 8 Vmax 1) Output Linearity Max Voltage VINmax = 430mV, VDD=5V 3.65 V Vmin 1) Output Linearity Min Voltage 200 mV Typical Offset Variation (LSB) UNIT -45 -20 +25 +90 °C -12 -7 - +13 LSB |
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