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ADC3421 Datasheet(PDF) 64 Page - Texas Instruments

Part # ADC3421
Description  ADC342x Quad-Channel, 12-Bit, 25-MSPS to 125-MSPS, Analog-to-Digital Converter
PDF  80 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

ADC3421 Datasheet(HTML) 64 Page - Texas Instruments

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ADC3421, ADC3422, ADC3423, ADC3424
SBAS673A – JULY 2014 – REVISED OCTOBER 2015
www.ti.com
9.6.1.28 Register 439h (address = 439h)
Figure 174. Register 439h
7
6
5
4
3
2
1
0
0
0
0
0
SP1 CHB
0
0
0
W-0h
W-0h
W-0h
W-0h
R/W-0h
W-0h
W-0h
W-0h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 37. Register 439h Field Descriptions
Bit
Field
Type
Reset
Description
7-4
0
W
0h
Must write 0.
3
SP1 CHB
R/W
0h
This bit sets the special mode for best performance on channel
B.
Always write 1 after reset.
2-0
0
W
0h
Must write 0.
9.6.1.29 Register 51Dh (address = 51Dh)
Figure 175. Register 51Dh
7
6
5
4
3
2
1
0
0
0
0
0
0
0
HIGH IF MODE3
0
W-0h
W-0h
W-0h
W-0h
W-0h
W-0h
R/W-0h
W-0h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 38. Register 51Dh Field Descriptions
Bit
Field
Type
Reset
Description
7-2
0
W
0h
Must write 0.
1
HIGH IF MODE3
R/W
0h
Set the HIGH IF MODE[7:0] bits together to FFh.
Improves HD3 by a couple of dB for IF > 100 MHz.
0
0
W
0h
Must write 0.
9.6.1.30 Register 522h (address = 522h)
Figure 176. Register 522h
7
6
5
4
3
2
1
0
0
0
0
0
0
0
DIS CHOP CHC
0
W-0h
W-0h
W-0h
W-0h
W-0h
W-0h
R/W-0h
W-0h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 39. Register 522h Field Descriptions
Bit
Field
Type
Reset
Description
7-2
0
W
0h
Must write 0.
1
DIS CHOP CHC
R/W
0h
This bit disables the chopper.
Set this bit to shift the 1/f noise floor at dc.
0 = 1/f noise floor is centered at fS / 2 (default)
1 = Chopper mechanism is disabled; 1/f noise floor is centered
at dc
0
0
W
0h
Must write 0.
64
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Copyright © 2014–2015, Texas Instruments Incorporated
Product Folder Links: ADC3421 ADC3422 ADC3423 ADC3424



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