CS5460A

DS487F4

3

3.8.7.3 AC Gain Calibration Sequence ........................................................... 31

3.8.7.4 DC Gain Calibration Sequence ......................................................... 31

3.8.8 Duration of Calibration Sequence ....................................................................... 31

3.9 Phase Compensation ...................................................................................................... 31

3.10 Time-Base Calibration Register ..................................................................................... 32

3.11 Power Offset Register ................................................................................................... 32

3.12 Input Protection - Current Limit ...................................................................................... 32

3.13 Input Filtering ................................................................................................................. 34

3.14 Protection Against High-Voltage and/or High-Current Surges ...................................... 37

3.15 Improving RFI Immunity ................................................................................................ 38

3.16 PCB Layout ................................................................................................................... 38

4. SERIAL PORT OVERVIEW .................................................................................................... 38

4.1 Commands (Write Only) .................................................................................................. 39

4.2 Serial Port Interface ......................................................................................................... 42

4.3 Serial Read and Write ..................................................................................................... 42

4.3.1 Register Write ..................................................................................................... 42

4.3.2 Register Read ..................................................................................................... 42

4.4 System Initialization ......................................................................................................... 42

4.5 Serial Port Initialization .................................................................................................... 43

4.6 CS5460A Power States ................................................................................................... 43

5. REGISTER DESCRIPTION ................................................................................................... 44

5.1 Configuration Register ......................................................................................................44

5.2 Current Channel DC Offset Register and Voltage Channel DC Offset Register .............. 46

5.3 Current Channel Gain Register and Voltage Channel Gain Register............................... 46

5.4 Cycle Count Register........................................................................................................46

5.5 Pulse-Rate Register .........................................................................................................47

5.6 I,V,P,E Signed Output Register Results ........................................................................... 47

5.7 IRMS, VRMS Unsigned Output Register Results ............................................................. 47

5.8 Timebase Calibration Register ......................................................................................... 47

5.9 Power Offset Register ...................................................................................................... 48

5.10 Current Channel AC Offset Register and Voltage Channel AC Offset Register............. 48

5.11 Status Register and Mask Register ................................................................................ 48

5.12 Control Register.............................................................................................................. 50

6. PIN DESCRIPTION ................................................................................................................. 51

7. PACKAGE DIMENSIONS ...................................................................................................... 53

8. ORDERING INFORMATION .................................................................................................. 54

9. CHANGE HISTORY ................................................................................................................ 54