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AD9680 bảng dữ liệu(PDF) 63 Page - Analog Devices

tên linh kiện AD9680
Giải thích chi tiết về linh kiện  Dual, 14-Bit, 1.25 GSPS, 1.2 V/2.5 V, Analog-to-Digital Converter
PDF  97 Pages
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nhà sản xuất  AD [Analog Devices]
Trang chủ  http://www.analog.com
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AD9680 bảng dữ liệu(HTML) 63 Page - Analog Devices

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Product
Overview
Online
Documentation
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Resources
Discussion
Sample
& Buy
Data Sheet
AD9680
Rev. C | Page 63 of 97
Chip
Application
Layer
Chip
Decimation
Ratio
DDC
Input
Type
DDC
Output
Type
Bandwidth
per DDC1
No. of Virtual
Converters
Required
Register Settings2
Four DDCs
16
Real
Complex
4.81% × fS
8
Register 0x200 = 0x03 (four DDCs; I/Q selected)
Register 0x201 = 0x04 (chip decimate by 16)
Register 0x310, Register 0x330, Register 0x350, Register 0x370 =
0x42 (real mixer; 6 dB gain; variable IF; complex output;
HB4 + HB3 + HB2 + HB1 filters)
Register 0x311 = 0x00 (DDC 0 I input = ADC Channel A;
DDC 0 Q input = ADC Channel A)
Register 0x331 = 0x00 (DDC 1 I input = ADC Channel A;
DDC 1 Q input = ADC Channel A)
Register 0x351 = 0x05 (DDC 2 I input = ADC Channel B;
DDC 2 Q input = ADC Channel B)
Register 0x371 = 0x05 (DDC 3 I input = ADC Channel B;
DDC 3 Q input = ADC Channel B)
Register 0x314, Register 0x315, Register 0x320, Register 0x321 =
FTW and POW set as required by application for DDC 0
Register 0x334, Register 0x335, Register 0x340, Register 0x341 =
FTW and POW set as required by application for DDC 1
Register 0x354, Register 0x355, Register 0x360, Register 0x361 =
FTW and POW set as required by application for DDC 2
Register 0x374, Register 0x375, Register 0x380, Register 0x381 =
FTW and POW set as required by application for DDC 3
1
fS is the ADC sample rate. Bandwidths listed are <−0.001 dB of pass-band ripple and >100 dB of stop-band alias rejection.
2
The NCOs must be synchronized either through the SPI or through the SYSREF± pin after all writes to the FTW or POW registers have completed, to ensure the proper
operation of the NCO. See the NCO Synchronization section for more information.



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