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ADS5271 bảng dữ liệu(PDF) 20 Page - Texas Instruments

tên linh kiện ADS5271
Giải thích chi tiết về linh kiện  10-Bit, Octal-Channel ADC Up to 65MSPS
PDF  42 Pages
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ADS5271 bảng dữ liệu(HTML) 20 Page - Texas Instruments

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ADS5287
SBAS428D – JANUARY 2008 – REVISED JUNE 2012
www.ti.com
PROGRAMMABLE GAIN
ADDRESS
IN HEX
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
NAME
X
X
X
X
GAIN_CH1<3:0>
X
X
X
X
GAIN_CH2<3:0>
2A
X
X
X
X
GAIN_CH3<3:0>
X
X
X
X
GAIN_CH4<3:0>
X
X
X
X
GAIN_CH5<3:0>
X
X
X
X
GAIN_CH6<3:0>
2B
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 2VPP range supported
by the ADS5287, a programmable gain can be set to achieve the full-scale output code even with a lower analog
input swing. The programmable gain not only fills the output code range of the ADC, but also enhances the SNR
of the device by utilizing quantization information from some extra internal bits. The programmable gain for each
channel can be individually set using a set of four bits, indicated as GAIN_CHN<3:0> for Channel N. The gain
setting is coded in binary from 0dB to 12dB, as shown in Table 6.
Table 6. Gain Setting for Channel 1
GAIN_CH1<3>
GAIN_CH1<2>
GAIN_CH1<1>
GAIN_CH1<0>
CHANNEL 1 GAIN SETTING
0
0
0
0
0dB
0
0
0
1
1dB
0
0
1
0
2dB
0
0
1
1
3dB
0
1
0
0
4dB
0
1
0
1
5dB
0
1
1
0
6dB
0
1
1
1
7dB
1
0
0
0
8dB
1
0
0
1
9dB
1
0
1
0
10dB
1
0
1
1
11dB
1
1
0
0
12dB
1
1
0
1
Do not use
1
1
1
0
Do not use
1
1
1
1
Do not use
20
Copyright © 2008–2012, Texas Instruments Incorporated



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