Cirrus Logic CRD5378 - Manual (Page 4)

CRD5378
4 DS639RD2
TABLE OF CONTENTS
1. INITIAL SETUP ......................................................................................................................... 6
1.1 Kit Contents ....................................................................................................................... 6
1.2 Hardware Setup ................................................................................................................. 6
1.2.1 Default Jumper Settings ........................................................................................ 7
1.3 Software Setup .................................................................................................................. 8
1.3.1 PC Requirements .................................................................................................. 8
1.3.2 Seismic Evaluation Software Installation .............................................................. 8
1.3.3 USBXpress® Driver Installation ............................................................................ 8
1.3.4 Launching the Seismic Evaluation Software ......................................................... 9
1.4 Self-Testing CRD5378 ..................................................................................................... 10
1.4.1 Noise Test ........................................................................................................... 10
1.4.2 Distortion Test ..................................................................................................... 11
2. HARDWARE DESCRIPTION ................................................................................................. 12
2.1 Block Diagram ................................................................................................................. 12
2.2 Analog Hardware ............................................................................................................. 13
2.2.1 Analog Inputs ...................................................................................................... 13
2.2.2 Differential Amplifiers .......................................................................................... 16
2.2.3 Delta-Sigma Modulator ....................................................................................... 17
2.2.4 Delta-Sigma Test DAC ........................................................................................ 18
2.2.5 Voltage Reference .............................................................................................. 18
2.3 Digital Hardware .............................................................................................................. 19
2.3.1 Digital Filter ......................................................................................................... 19
2.3.2 Microcontroller .................................................................................................... 22
2.3.3 RS-485 Telemetry ............................................................................................... 24
2.3.4 UART Connection ............................................................................................... 26
2.3.5 External Connector ............................................................................................. 27
2.4 Power Supplies ................................................................................................................ 27
2.4.1 Analog Voltage Regulators ................................................................................. 27
2.5 PCB Layout ...................................................................................................................... 28
2.5.1 Layer Stack ......................................................................................................... 28
2.5.2 Differential Pairs .................................................................................................. 28
2.5.3 Bypass Capacitors .............................................................................................. 30
3. SOFTWARE DESCRIPTION .................................................................................................. 31
3.1 Menu Bar ......................................................................................................................... 31
3.2 About Panel ..................................................................................................................... 32
3.3 Setup Panel ..................................................................................................................... 33
3.3.1 USB Port ............................................................................................................. 34
3.3.2 Digital Filter ......................................................................................................... 35
3.3.3 Analog Front End ................................................................................................ 36
3.3.4 Test Bit Stream ................................................................................................... 36
3.3.5 Gain/Offset .......................................................................................................... 37
3.3.6 Data Capture ....................................................................................................... 38
3.3.7 External Macros .................................................................................................. 39
3.4 Analysis Panel ................................................................................................................. 40
3.4.1 Test Select .......................................................................................................... 41
3.4.2 Statistics .............................................................................................................. 42
3.4.3 Cursor ................................................................................................................. 42
3.4.4 Zoom ................................................................................................................... 43
3.4.5 Refresh ................................................................................................................ 43
3.4.6 Harmonics ........................................................................................................... 43
3.4.7 Spot Noise ........................................................................................................... 43