CS5466(2004) Ver la hoja de datos (PDF) - Cirrus Logic

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CS5466
(Rev.:2004)

Low Cost Power/Energy IC with Pulse Output

Cirrus Logic 

CS5466

TABLE OF CONTENTS

1. GENERAL DESCRIPTION ....................................................................................................... 3

2. PIN DESCRIPTION ................................................................................................................... 4

3. CHARACTERISTICS/SPECIFICATIONS ................................................................................. 5

RECOMMENDED OPERATING CONDITIONS ....................................................................... 5

ANALOG CHARACTERISTICS ................................................................................................ 5

VOLTAGE REFERENCE.......................................................................................................... 6

DIGITAL CHARACTERISTICS ................................................................................................. 7

SWITCHING CHARACTERISTICS .......................................................................................... 8

ABSOLUTE MAXIMUM RATINGS ........................................................................................... 9

4. THEORY OF OPERATION ..................................................................................................... 10

4.1 Digital Filters .................................................................................................................... 10

4.2 Average Real Power Computation ................................................................................... 10

5. FUNCTIONAL DESCRIPTION ............................................................................................... 11

5.1 Analog Inputs ................................................................................................................... 11

5.1.1 Voltage Channel .................................................................................................. 11

5.1.2 Current Channel .................................................................................................. 11

5.2 High-Pass Filter ............................................................................................................... 11

5.3 Energy Pulse Outputs ...................................................................................................... 11

5.3.1 Pulse Output Format. .......................................................................................... 11

5.3.2 Selecting Frequency of E1 and E2 ...................................................................... 11

5.3.3 Selecting Frequency of FOUT ............................................................................. 12

5.3.4 Absolute Max Frequency on E1 and E2 .............................................................. 12

5.3.5 E1 and E2 Frequency Calculation ....................................................................... 12

5.4 Energy Direction Indicator ............................................................................................... 13

5.5 Power-on Reset ............................................................................................................... 13

5.6 Oscillator Characteristics ................................................................................................. 13

5.7 Basic Application Circuit .................................................................................................. 13

6. PACKAGE DIMENSIONS ....................................................................................................... 15

7. REVISIONS ............................................................................................................................ 16

LIST OF FIGURES

Figure 1. Timing Diagram for E1, E2 and FOUT ............................................................................. 8

Figure 2. Data Flow ....................................................................................................................... 10

Figure 3. Oscillator Connection ..................................................................................................... 13

Figure 4. Typical Connection Diagram .......................................................................................... 14

LIST OF TABLES

Table 1. Current Channel PGA Setting ......................................................................................... 11

Table 2. Maximum Frequency for E1, E2 and FOUT ................................................................... 12

Table 3. Absolute Max Frequency on E1 and E2.......................................................................... 12

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