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ADS5294IPFPR 데이터시트(PDF) 51 Page - Texas Instruments

부품명 ADS5294IPFPR
상세설명  ADS5294 Octal-Channel 14-Bit 80-MSPS High-SNR and Low-Power ADC
PDF  82 Pages
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ADS5294IPFPR 데이터시트(HTML) 51 Page - Texas Instruments

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ADS5294
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SLAS776E – NOVEMBER 2011 – REVISED APRIL 2018
Product Folder Links: ADS5294
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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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