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CS5460A
Cirrus Logic CS5460A Manuals
Manuals and User Guides for Cirrus Logic CS5460A. We have
1
Cirrus Logic CS5460A manual available for free PDF download: Manual
Cirrus Logic CS5460A Manual (64 pages)
Single Phase Bi-Directional Power/Energy IC
Brand:
Cirrus Logic
| Category:
Media Converter
| Size: 1 MB
Table of Contents
Table of Contents
2
1 Characteristics and Specifications
5
Analog Characteristics
5
Vrefout Reference Output Voltage
7
Digital Characteristics
8
Absolute Maximum Ratings
8
Switching Characteristics
9
Figure 1. CS5460A Read and Write Timing Diagrams
10
Figure 2. CS5460A Auto-Boot Sequence Timing
11
2 General Description
12
Theory of Operation
12
DS Modulators
12
High-Rate Digital Low-Pass Filters
12
Digital Compensation Filters
13
Digital High-Pass Filters
13
Overall Filter Response
13
Gain and DC Offset Adjustment
13
Real Energy and RMS Computations
13
Performing Measurements
13
Figure 3. Data Flow
14
Figure 4. Voltage Input Filter Characteristics
14
Figure 5. Current Input Filter Characteristics
14
CS5460A Linearity Performance
15
Table 1. Differential Input Voltage Vs. Output Code
15
Table 2. Available Range of ±0.1% Output Linearity, with Default Settings in the Gain/Offset Registers
15
Continuous Computation Cycles (C=1)
16
Single Computation Cycle (C=0)
16
Basic Application Circuit Configurations
17
3 Serial Port Overview
18
Figure 6. Typical Connection Diagram (One-Phase 2-Wire, Direct Connect to Power Line)
18
Figure 7. Typical Connection Diagram (One-Phase 2-Wire, Isolated from Power Line)
18
Figure 8. Typical Connection Diagram (One-Phase 3-Wire)
19
Figure 9. Typical Connection Diagram (One-Phase 3-Wire - no Neutral Available)
19
Commands (Write Only)
20
Serial Port Interface
23
Serial Read and Write
23
Register Write
23
Register Read
23
Serial Port Initialization
24
System Initialization
24
Table 3. Default Register Values Upon Reset Event
24
CS5460A Power States
25
4 Functional Description
26
Pulse-Rate Output
26
Pulse Output for Normal, Stepper Motor and Mechanical Counter Format
28
Normal Format
28
Mechanical Counter Format
29
Stepper Motor Format
29
Figure 11. Mechanical Counter Format on EOUT and EDIR
29
Figure 12. Stepper Motor Format on EOUT and EDIR
29
Auto-Boot Mode Using EEPROM
30
Auto-Boot Configuration
30
Auto-Boot Data for EEPROM
30
Figure 13. Typical Interface of EEPROM to CS5460A
30
Which Eeproms Can be Used
31
Figure 14. Timing Diagram for Auto-Boot Sequence
31
Interrupt and Watchdog Timer
33
Interrupt
33
Clearing the Status Register
33
Typical Use of the INT Pin
33
Figure 15. CS5460A Auto-Boot Configuration: Automatic Restart after Power Failure
33
INT Active State
34
Exceptions
34
Watch Dog Timer
34
Oscillator Characteristics
34
Analog Inputs
35
Voltage Reference
35
Figure 16. Oscillator Connection
35
Figure 17. VREFOUT Voltage Vs. Temperature Characteristic for a Typical CS5460A Sample
35
Calibration
36
Overview of Calibration Process
36
The Calibration Registers
37
Calibration Sequence
37
Calibration Signal Input Level
38
Calibration Signal Frequency
38
Input Configurations for Calibrations
38
Description of Calibration Algorithms
39
AC Offset Calibration Sequence
39
Figure 18. System Calibration of Gain
39
Figure 19. System Calibration of Offset
39
DC Offset Calibration Sequence
40
AC Gain Calibration Sequence
40
DC Gain Calibration Sequence
40
Figure 20. Calibration Data Flow
40
Duration of Calibration Sequence
41
Is Calibration Required
41
Figure 21. Example of AC Gain Calibration
41
Figure 22. Another Example of AC Gain Calibration
41
Figure 23. Example of DC Gain Calibration
41
Order of Calibration Sequences
42
Calibration Tips
43
Phase Compensation
43
Time-Base Calibration Register
44
Power Offset Register
44
Input Protection - Current Limit
45
Input Filtering
46
Protection against High-Voltage And/Or High-Current Surges
50
Improving RFI Immunity
50
Figure 24. Input Protection for Single-Ended Input Configurations
51
PCB Layout
52
5 Register Description
53
Configuration Register
53
Figure 25. CS5460A Register Diagram
53
Current Channel DC Offset Register and Voltage Channel DC Offset Register
55
Current Channel Gain Register and Voltage Channel Gain Register
55
Cycle Count Register
55
Pulse-Rate Register
56
I,V,P,E Signed Output Register Results
56
IRMS, VRMS Unsigned Output Register Results
56
Timebase Calibration Register
56
Power Offset Register
57
Current Channel AC Offset Register and Voltage Channel AC Offset Register
57
Status Register and Mask Register
57
Control Register
59
6 Pin Description
60
7 Package Dimensions
62
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