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MCP3008T Datasheet(PDF) 20 Page - Microchip Technology |
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MCP3008T Datasheet(HTML) 20 Page - Microchip Technology |
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20 / 40 page  MCP3004/3008 DS21295D-page 20 © 2008 Microchip Technology Inc. FIGURE 5-1: Communication with the MCP3004 or MCP3008. FIGURE 5-2: Communication with MCP3004 or MCP3008 in LSB First Format. CS CLK DIN DOUT D1 D2 D0 HI-Z Don’t Care Null Bit B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 * HI-Z tSAMPLE tCONV SGL/ DIFF Start tCYC tCSH tCYC D2 SGL/ DIFF Start * After completing the data transfer, if further clocks are applied with CS low, the A/D converter will output LSB first data, then followed with zeros indefinitely. See Figure 5-2 below. ** tDATA: during this time, the bias current and the comparator powers down while the reference input becomes a high-impedance node. tDATA ** tSUCS Null Bit B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 CS CLK DOUT HI-Z HI-Z (MSB) tCONV tDATA ** Power Down tSAMPLE Start SGL/ DIFF DIN tCYC tCSH D0 D1 D2 * After completing the data transfer, if further clocks are applied with CS low, the A/D converter will output zeros indefinitely. ** tDATA: During this time, the bias circuit and the comparator powers down while the reference input becomes a high-impedance node, leaving the CLK running to clock out LSB first data or zeroes. tSUCS Don’t Care * |
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