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MSC1202Y2RHHT датащи(PDF) 70 Page - Texas Instruments |
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MSC1202Y2RHHT датащи(HTML) 70 Page - Texas Instruments |
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70 / 92 page ![]() MSC1200 MSC1201 MSC1202 SBAS317E − APRIL 2004 − REVISED MAY 2006 www.ti.com 70 ADC Control 0 (ADCON0) 7 6 5 4 3 2 1 0 Reset Value SFR DCh — BOD EVREF VREFH EBUF PGA2 PGA1 PGA0 30h BOD Burnout Detect. When enabled, this connects a positive current source to the positive channel and a negative bit 6 current source to the negative channel. If the channel is open circuit, then the ADC results will be full-scale (buffer must be enabled). 0 = Burnout Current Sources Off (default). 1 = Burnout Current Sources On. EVREF Enable Internal Voltage Reference. If an external voltage is used, the internal voltage reference should be disabled. bit 5 0 = Internal Voltage Reference Off for external reference. 1 = Internal Voltage Reference On (default). Note that in this mode, REFIN− must be connected to AGND. VREFH Voltage Reference High Select. The internal voltage reference can be selected to be 2.5V or 1.25V. bit 4 0 = REFOUT/REF IN+ is 1.25V. 1 = REFOUT/REF IN+ is 2.5V (default). EBUF Enable Buffer. Enables the input buffer to provide higher input impedance but limits the input voltage range and bit 3 dissipates more power. 0 = Buffer disabled (default). 1 = Buffer enabled. Input signal limited to AVDD − 1.5V. PGA2−0 Programmable Gain Amplifier. Sets the gain for the PGA from 1 to 128. bits 2−0 PGA2 PGA1 PGA0 GAIN 0 0 0 1 (default) 0 0 1 2 0 1 0 4 0 1 1 8 1 0 0 16 1 0 1 32 1 1 0 64 1 1 1 128 |
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