SBASAU8 December 2024 ADC3649
PRODMIX
- 1
- 1 Features
- 2 Applications
- 3 Description
- 4 Device Comparison
- 5 Pin Configuration and Functions
-
6 Specifications
- 6.1 Absolute Maximum Ratings
- 6.2 ESD Ratings
- 6.3 Recommended Operating Conditions
- 6.4 Thermal Information
- 6.5 Electrical Characteristics - Power Consumption
- 6.6 Electrical Characteristics - DC Specifications
- 6.7 Electrical Characteristics - AC Specifications (ADC3648 - 250 MSPS)
- 6.8 Electrical Characteristics - AC Specifications (ADC3649 - 500 MSPS)
- 6.9 Timing Requirements
- 6.10 Typical Characteristics, ADC3648
- 6.11 Typical Characteristics, ADC3649
- 7 Parameter Measurement Information
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3 Feature Description
- 8.4 Device Functional Modes
- 8.5 Programming
- 9 Application and Implementation
- 10Device and Documentation Support
- 11Revision History
- 12Mechanical, Packaging, and Orderable Information
パッケージ・オプション
メカニカル・データ（パッケージ｜ピン）
- RTD|64
サーマルパッド・メカニカル・データ
- RTD|64
発注情報
8.3.8.2 Decimation Filter Response
This section provides the different decimation filter responses with a normalized ADC sampling rate. The complex filter pass band is approximately 80% (−1dB) with a minimum of 85dB stop band rejection.
The decimation filter responses are normalized to the ADC sampling clock frequency FS and illustrated in Figure 8-23 to Figure 8-49. The interpretation is as follows: Each figure contains the filter pass-band, transition bands and alias or stop-bands as shown in Figure 8-22. The x-axis shows the offset frequency (after the NCO frequency shift) normalized to the ADC sampling rate FS.
For example, in the divide-by-4 complex setup, the output data rate is FS / 4 complex with a Nyquist zone of FS / 8 or 0.125 × FS. The transition band (colored in blue) is centered around 0.125 × FS and the alias transition band is centered at 0.375 × FS. The stop-bands (colored in red), which alias on top of the pass-band, are centered at 0.25 × FS and 0.5 × FS. The stop-band attenuation is greater than 85dB.
Figure 8-22 Interpretation of the Decimation Filter Plots
Figure 8-23 Complex Decimation by 2 Filter Response
Figure 8-25 Complex Decimation by 4 Filter Response
Figure 8-27 Complex Decimation by 8 Filter Response
Figure 8-29 Complex Decimation by 16 Filter Response
Figure 8-31 Complex Decimation by 32 Filter Response
Figure 8-33 Complex Decimation by 64 Filter Response
Figure 8-35 Complex Decimation by 128 Filter Response
Figure 8-37 Complex Decimation by 256 Filter Response
Figure 8-39 Complex Decimation by 512 Filter Response
Figure 8-41 Complex Decimation by 1024 Filter Response
Figure 8-43 Complex Decimation by 2048 Filter Response
Figure 8-45 Complex Decimation by 4096 Filter Response
Figure 8-47 Complex Decimation by 8192 Filter Response
Figure 8-49 Complex Decimation by 16384 Filter Response
Figure 8-51 Complex Decimation by 32768 Filter Response
Figure 8-24 Decimation by 2 Passband Ripple Response
Figure 8-26 Decimation by 4 Passband Ripple Response
Figure 8-28 Decimation by 8 Passband Ripple Response
Figure 8-30 Decimation by 16 Passband Ripple Response
Figure 8-32 Decimation by 32 Passband Ripple Response
Figure 8-34 Complex Decimation by 64 Filter Ripple
Response
Figure 8-36 Decimation by 128 Passband Ripple Response
Figure 8-38 Decimation by 256 Passband Ripple Response
Figure 8-40 Decimation by 512 Passband Ripple Response
Figure 8-42 Decimation by 1024 Passband Ripple Response
Figure 8-44 Decimation by 2048 Passband Ripple Response
Figure 8-46 Decimation by 4096 Passband Ripple Response
Figure 8-48 Decimation by 8192 Passband Ripple Response
Figure 8-50 Decimation by 16384 Passband Ripple Response
Figure 8-52 Decimation by 32768 Passband Ripple
Response