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CS5460A-BS 其他数据使用手册 - Cirrus Logic（思睿逻辑）
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Cirrus Logic（思睿逻辑）
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SOIC-8
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电流和电力监控器、调节器 Single-Phase Bi-Dir Power/Energy IC
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CS5460A-BS数据手册
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CS5460A
2 DS487F4
TABLE OF CONTENTS
1. CHARACTERISTICS AND SPECIFICATIONS ........................................................................5
ANALOG CHARACTERISTICS................................................................................................5
VREFOUT REFERENCE OUTPUT VOLTAGE........................................................................7
5V DIGITAL CHARACTERISTICS............................................................................................7
3.3 V DIGITAL CHARACTERISTICS........................................................................................8
ABSOLUTE MAXIMUM RATINGS ...........................................................................................8
SWITCHING CHARACTERISTICS ..........................................................................................9
2. OVERVIEW .............................................................................................................................12
2.1 Theory of Operation .........................................................................................................12
2.1.1 DS Modulators ...................................................................................................12
2.1.2 High-Rate Digital Low-Pass Filters .....................................................................12
2.1.3 Digital Compensation Filters ...............................................................................12
2.1.4 Digital High-Pass Filters ......................................................................................12
2.1.5 Overall Filter Response .......................................................................................13
2.1.6 Gain and DC Offset Adjustment ..........................................................................13
2.1.7 Real Energy and RMS Computations .................................................................13
2.2 Performing Measurements ...............................................................................................13
2.2.1 CS5460A Linearity Performance .........................................................................15
2.2.2 Single Computation Cycle (C=0) .........................................................................15
2.2.3 Continuous Computation Cycles (C=1) ...............................................................16
2.3 Basic Application Circuit Configurations ..........................................................................16
3. FUNCTIONAL DESCRIPTION ...............................................................................................21
3.1 Pulse-Rate Output ...........................................................................................................21
3.2 Pulse Output for Normal Format,
Stepper Motor Format and Mechanical Counter Format ..............................................22
3.2.1 Normal Format ....................................................................................................22
3.2.2 Mechanical Counter Format ................................................................................23
3.2.3 Stepper Motor Format .........................................................................................23
3.3 Auto-Boot Mode Using EEPROM ....................................................................................24
3.3.1 Auto-Boot Configuration ......................................................................................24
3.3.2 Auto-Boot Data for EEPROM ..............................................................................25
3.3.3 Application Note AN225 ......................................................................................26
3.4 Interrupt and Watchdog Timer .........................................................................................26
3.4.1 Interrupt ...............................................................................................................26
3.4.1.1 Clearing the Status Register ...............................................................26
3.4.1.2 Typical use of the INT pin ...................................................................26
3.4.1.3 INT Active State ..................................................................................26
3.4.1.4 Exceptions ...........................................................................................26
3.4.2 Watch Dog Timer ................................................................................................26
3.5 Oscillator Characteristics .................................................................................................27
3.6 Analog Inputs ...................................................................................................................27
3.7 Voltage Reference ...........................................................................................................27
3.8 Calibration ........................................................................................................................27
3.8.1 Overview of Calibration Process .........................................................................27
3.8.2 The Calibration Registers ....................................................................................28
3.8.3 Calibration Sequence ..........................................................................................28
3.8.4 Calibration Signal Input Level .............................................................................29
3.8.5 Calibration Signal Frequency ..............................................................................29
3.8.6 Input Configurations for Calibrations ...................................................................29
3.8.7 Description of Calibration Algorithms ..................................................................30
3.8.7.1 AC Offset Calibration Sequence .........................................................30
3.8.7.2 DC Offset Calibration Sequence .........................................................31
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