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ADS5292IPFPR 数据表(PDF) 39 Page - Texas Instruments

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部件名 ADS5292IPFPR
功能描述  Octal Channel 12-Bit, 80 MSPS and Low-Power ADC
PDF  67 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

ADS5292IPFPR 数据表(HTML) 39 Page - Texas Instruments

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background image
24-tap filter
(Even Tap)
24-tap filter
(Even Tap)
Decimation
by 2 or
by 4
GAIN
(0 to 12 dB ,
1 dB steps )
DIGITAL PROCESSING BLOCK for
CHANNEL 1
Test Patterns
-
Ramp
MAPPER
MULTIPLEXER
8 : 8
LVDS OUTPUTS
14-BIT
½ ADS529x
Average of 2
channels
Average of 4
channels
Channel 1 ADC Data
23-tap filter
(Odd Tap)
Built-in Coefficients
Decimation
by 2 or
by 4 or
by 8
Custom Coefficients
Serializer
Wire 1
Serializer
Wire 2
Channel
1
Serializer
Wire 1
Serializer
Wire 2
Channel
2
Serializer
Wire 1
Serializer
Wire 2
Channel
3
Serializer
Wire 1
Serializer
Wire 2
Channel
4
OUT 1A
OUT 1B
OUT 2A
OUT 2B
OUT 3A
OUT 3B
OUT 4A
OUT 4B
12-tap filter
Channel 2 ADC Data
Channel 3 ADC Data
Channel 4 ADC Data
23-tap filter
(Odd Tap)
ADS5292
www.ti.com
SLAS788B – NOVEMBER 2011 – REVISED JULY 2012
Figure 49. Digital Processing Block Diagram
PROGRAMMABLE DIGITAL GAIN
ADDR.
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
NAME
(HEX)
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 ADS5292, a programmable digital gain can be set to achieve the full-scale output code even with a lower
analog input swing. 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 0-12 dB as shown in
Table 4.
Table 4. 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
Copyright © 2011–2012, Texas Instruments Incorporated
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