Instruction Manual
Table Of Contents
- Features & Description
- General Description
- Table of Contents
- List of Figures
- List of Tables
- 1. Characteristics and Specifications
- 2. Overview
- 3. Theory of Operation
- 3.1 Converter Operation
- 3.2 Clock
- 3.3 Voltage Reference
- 3.4 Analog Input
- 3.5 Output Coding Format
- 3.6 Typical Connection Diagrams
- 3.7 AIN & VREF Sampling Structures
- 3.8 Converter Performance
- 3.9 Digital Filter Characteristics
- 3.10 Serial Port
- 3.11 Power Supplies & Grounding
- 3.12 Using the CS5581 in Multiplexing Applications
- 3.13 Synchronizing Multiple Converters
- 4. Pin Descriptions
- 5. Package Dimensions
- 6. Ordering Information
- 7. Environmental, Manufacturing, & Handling Information
- 8. Revision History
CS5581
DS796PP1 23
3/25/08
14:34
3.9 Digital Filter Characteristics
The digital filter is designed for fast settling, therefore it exhibits very little in-band attenuation. The filter
attenuation is 0.26347 dB at 100 kHz when sampling at 200 kSps.
Figure 18. CS5581 Spectral Response (DC to fs/2)
Figure 19. CS5581 Spectral Response (DC to 20 kHz)
Figure 20. CS5581 Spectral Response (DC to 8fs)
-0.30
-0.25
-0.20
-0.15
-0.10
-0.05
0.00
0 20k 40k 60k 80k 100k
Frequency (Hz)
-0.01049 dB
-0.16813 dB
-0.26347 dB
fs = 200 kSps
-0.04206 dB
-0.09443 dB
-0.015
-0.01
-0.005
0.00
0 5k 10k 15k 20
k
Frequency (Hz)
-0.002622 dB
-0.005901 dB
-0.01049 dB
fs = 200 kSps
-0.006283 dB
-120
-100
-80
-60
-40
-20
0
0 400k 800k 1.2M 1.6M
Frequency (Hz)
fs = 200 kSps