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ADS5294IPFPR датащи(PDF) 51 Page - Texas Instruments |
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ADS5294IPFPR датащи(HTML) 51 Page - Texas Instruments |
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51 / 82 page ![]() 51 ADS5294 www.ti.com SLAS776E – NOVEMBER 2011 – REVISED APRIL 2018 Product Folder Links: ADS5294 Submit Documentation Feedback Copyright © 2011–2018, Texas Instruments Incorporated 9.6.1.7 Programmable Digital Gain Table 12. Programmable Digital Gain ADDR. (HEX) D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 NAME 2A X X X X GAIN_CH1<3:0> X X X X GAIN_CH2<3:0> X X X X GAIN_CH3<3:0> X X X X GAIN_CH4<3:0> 2B X X X X GAIN_CH5<3:0> X X X X GAIN_CH6<3:0> X X X X GAIN_CH7<3:0> X X X X GAIN_CH8<3:0> In applications where the full-scale swing of the analog input signal is much less than the 2 VPP range supported by the ADS5294, a programmable gain is set to achieve the full-scale output code even with a lower analog input swing. The programmable gain for each channel is set individually using a set of four bits, indicated as GAIN_CHN<3:0> for Channel N. The gain setting is coded in binary from 0 to 12 dB as shown in Table 13. Table 13. Gain Setting for Channel N GAIN_CHN<3> GAIN_CHN<2> GAIN_CHN<1> GAIN_CHN<0> CHANNEL N GAIN SETTING 0 0 0 0 0 dB 0 0 0 1 1 dB 0 0 1 0 2 dB 0 0 1 1 3 dB 0 1 0 0 4 dB 0 1 0 1 5 dB 0 1 1 0 6 dB 0 1 1 1 7 dB 1 0 0 0 8 dB 1 0 0 1 9 dB 1 0 1 0 10 dB 1 0 1 1 11 dB 1 1 0 0 12 dB 1 1 0 1 Do not use 1 1 1 0 Do not use 1 1 1 1 Do not use 9.6.1.8 Channel Averaging Table 14. Channel Averaging ADDR. (HEX) D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 NAME 29 X EN_CHANNEL_AVG 2C X X AVG_CTRL4<1:0> X X AVG_CTRL3<1:0> X X AVG_CTRL2<1:0> X X AVG_CTRL1<1:0> 2D X X AVG_CTRL8<1:0> X X AVG_CTRL7<1:0> X X AVG_CTRL6<1:0> X X AVG_CTRL5<1:0> |
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