Cirrus-logic CRD5376 Manuel d'utilisateur télécharger pdf (Page 31)

CRD5376

DS612RD2 31

2.5.3 Bypass Capacitors

Each device power supply pin includes 0.1 µF bypass capacitors placed as close as possible to the pin.

Each power supply net includes at least 100 µF bulk capacitance as a charge well for transient current

loads.

Figure 4. Bypass Capacitor Placement

VA+ bypass

bypass

VA-

bypass

CS3301A

Device

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 67 68

Features 1
General Description 1
REVISION HISTORY 2
TABLE OF CONTENTS 3
LIST OF FIGURES 4
LIST OF TABLES 4
1. INITIAL SETUP 5
1.1 Kit Contents 5
1.2 Hardware Setup 5
1.2.1 Default Jumper Settings 6
1.3 Software Setup 7
1.3.1 PC Requirements 7
8 DS612RD2 8
1.4 Self-Testing CRD5376 9
1.4.1 Noise Test 9
1.4.2 Distortion Test 10
2. HARDWARE DESCRIPTION 11
2.1 Block Diagram 11
2.2.1.1 External Inputs - INA 12
2.2.1.4 Input Protection 12
2.2.1.5 Input RC Filters 13
2.2.1.7 Analog Test Switches 14
2.2.1.6 Common Mode Bias 14
2.2.2.3 Anti-alias RC Filters 17
2.2.3.2 Offset Enable - OFST 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
20 DS612RD2 20
2.3.1.1 MCLK vs. MCLK/2 Usage 21
22 DS612RD2 22
CS5376A uController MCLK/2 22
SDTKI R74 R83 22
DS612RD2 23 23
2.3.2.1 SPI Interface 24
2.3.2.2 USB Interface 24
2.3.2.3 Reset Source 24
2.3.2.4 Clock Source 24
2.3.2.5 Timebreak Signal 25
2.3.2.6 C2 Debug Interface 25
2.3.4 RS-485 Telemetry 26
2.3.4.1 CLK, SYNC 27
2.3.5 UART Connection 28
2.3.6 External Connector 28
2.4 Power Supplies 28
DS612RD2 29 29
2.5.2 Differential Pairs 30
2.5.3 Bypass Capacitors 31
3. SOFTWARE DESCRIPTION 32
3.1 Menu Bar 32
3.2 About Panel 33
3.3 Setup Panel 34
3.3.1 USB Port 35
3.3.2 Digital Filter 36
3.3.3 Analog Front End 37
3.3.4 Test Bit Stream 37
3.3.5 Gain/Offset 38
3.3.6 Data Capture 39
3.3.7 External Macros 40
3.4 Analysis Panel 41
3.4.1 Test Select 42
3.4.2 Statistics 43
3.4.3 Plot Enable 43
44 DS612RD2 44
3.5 Control Panel 45
3.5.1 DF Registers 46
3.5.2 DF Commands 46
3.5.3 SPI 46
3.5.4 Macros 47
3.5.5 GPIO 47
3.5.6 Customize 48
3.5.7 External Macros 48
4. BILL OF MATERIALS 49
50 DS612RD2 50
5. LAYER PLOTS 51
52 DS612RD2 52
DS612RD2 53 53
54 DS612RD2 54
DS612RD2 55 55
56 DS612RD2 56
6. SCHEMATICS 57
58 DS612RD2 58
DS612RD2 59 59
60 DS612RD2 60
DS612RD2 61 61
62 DS612RD2 62
DS612RD2 63 63
64 DS612RD2 64
DS612RD2 65 65
66 DS612RD2 66
DS612RD2 67 67
68 DS612RD2 68

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Cirrus-logic CRD5376 Manuel d'utilisateur Page 31

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