Cirrus Logic CS5466 - Manual (Page 2)

CS5466
2 DS659F2
TABLE OF CONTENTS
1. OVERVIEW ............................................................................................................................... 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 Active 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 ....................................................................... 13
5.4 Energy Direction Indicator ............................................................................................... 13
5.5 Power-on Reset ............................................................................................................... 13
5.6 Oscillator Characteristics ................................................................................................. 13
5.7 Basic Application Circuit .................................................................................................. 14
6. PACKAGE DIMENSIONS ....................................................................................................... 15
7. REVISION HISTORY .............................................................................................................. 16
LIST OF FIGURES
Figure 1. Timing Diagram for E1, E2 and FOUT (Not to Scale) ...................................................... 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