Cirrus Logic CDB5376 - Manual (Page 3)

CDB5376
DS612DB3 3
TABLE OF CONTENTS
1. INITIAL SETUP ......................................................................................................................... 7
1.1 Kit Contents ....................................................................................................................... 7
1.2 Hardware Setup ................................................................................................................. 7
1.2.1 Default Jumper Settings ........................................................................................ 8
1.2.2 Default DIP Switch Settings ............................................................................... 10
1.3 Software Setup ................................................................................................................ 11
1.3.1 PC Requirements ................................................................................................ 11
1.3.2 Seismic Evaluation Software Installation ............................................................ 11
1.3.3 USBXpress Driver Installation ............................................................................. 11
1.3.4 Launching the Seismic Evaluation Software ....................................................... 12
1.4 Self-testing CDB5376 ...................................................................................................... 13
1.4.1 Noise test ............................................................................................................ 13
1.4.2 Distortion Test ..................................................................................................... 14
2. HARDWARE DESCRIPTION ................................................................................................. 15
2.1 Block Diagram ................................................................................................................ 15
2.2 Analog Hardware ............................................................................................................. 16
2.2.1 Analog Inputs ...................................................................................................... 16
2.2.2 Differential Amplifiers .......................................................................................... 19
2.2.3 Delta-Sigma Modulators ..................................................................................... 20
2.2.4 Delta-Sigma Test DAC ........................................................................................ 21
2.2.5 Voltage Reference .............................................................................................. 22
2.3 Digital Hardware .............................................................................................................. 23
2.3.1 Digital Filter ......................................................................................................... 23
2.3.2 Interface CPLD ................................................................................................... 25
2.3.3 Digital Control Signals ......................................................................................... 27
2.3.4 Microcontroller .................................................................................................... 27
2.3.5 Phase Locked Loop ............................................................................................ 29
2.3.6 RS-485 Telemetry ............................................................................................... 31
2.3.7 UART Connection ............................................................................................... 32
2.3.8 External Connector ............................................................................................. 33
2.4 Power Supplies ................................................................................................................ 33
2.4.1 Analog Voltage Regulators ................................................................................. 33
2.4.2 Digital Voltage Regulators .................................................................................. 34
2.5 PCB Layout ..................................................................................................................... 35
2.5.1 Layer Stack ......................................................................................................... 35
2.5.2 Differential Pairs .................................................................................................. 35
2.5.3 Bypass Capacitors .............................................................................................. 36
2.5.4 Dual Row Headers .............................................................................................. 37
3. SOFTWARE DESCRIPTION .................................................................................................. 38
3.1 Menu Bar ......................................................................................................................... 38
3.2 About Panel ..................................................................................................................... 39
3.3 Setup Panel ..................................................................................................................... 40
3.3.1 USB Port ............................................................................................................. 41
3.3.2 Digital Filter ......................................................................................................... 42
3.3.3 Analog Front End ................................................................................................ 43
3.3.4 Test Bit Stream ................................................................................................... 43
3.3.5 Gain/Offset .......................................................................................................... 44
3.3.6 Data Capture ....................................................................................................... 45
3.3.7 External Macros .................................................................................................. 46
3.4 Analysis Panel ................................................................................................................. 47
3.4.1 Test Select .......................................................................................................... 48
3.4.2 Statistics .............................................................................................................. 49