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Cirrus Logic CS5530 User Manual

Page 2

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CS5530

2

DS742F3

TABLE OF CONTENTS

1.

CHARACTERISTICS AND SPECIFICATIONS ................................................................. 4

ANALOG CHARACTERISTICS................................................................................ 4
TYPICAL NOISE-FREE RESOLUTION (BITS) ........................................................ 6
5 V DIGITAL CHARACTERISTICS .......................................................................... 7
3 V DIGITAL CHARACTERISTICS .......................................................................... 7
DYNAMIC CHARACTERISTICS .............................................................................. 8
ABSOLUTE MAXIMUM RATINGS ........................................................................... 8
SWITCHING CHARACTERISTICS .......................................................................... 9

2.

GENERAL DESCRIPTION .............................................................................................. 11
2.1.

Analog Input ........................................................................................................... 11
2.1.1. Analog Input Span .......................................................................................... 12
2.1.2. Voltage Noise Density Performance ........................................................... 12
2.1.3. No Offset DAC ............................................................................................ 12

2.2.

Overview of ADC Register Structure and Operating Modes .................................. 12
2.2.1. System Initialization .................................................................................... 12
2.2.2. Command Register Descriptions ................................................................ 14
2.2.3. Serial Port Interface .................................................................................... 16
2.2.4. Reading/Writing On-Chip Registers ............................................................ 17

2.3.

Configuration Register ........................................................................................... 17
2.3.1. Power Consumption ................................................................................... 17
2.3.2. System Reset Sequence ............................................................................ 17
2.3.3. Input Short .................................................................................................. 17
2.3.4. Voltage Reference Select .......................................................................... 17
2.3.5. Output Latch Pins ....................................................................................... 18
2.3.6. Filter Rate Select ........................................................................................ 18
2.3.7. Word Rate Select ........................................................................................ 18
2.3.8. Unipolar/Bipolar Select ............................................................................... 18
2.3.9. Open Circuit Detect .................................................................................... 18
2.3.10. Configuration Register Description ........................................................... 19

2.4.

Calibration .............................................................................................................. 21
2.4.1. Calibration Registers .................................................................................. 21
2.4.2. Gain Register ............................................................................................. 21
2.4.3. Offset Register ........................................................................................... 21
2.4.4. Performing Calibrations .............................................................................. 22
2.4.5. System Calibration ...................................................................................... 22
2.4.6. Calibration Tips ........................................................................................... 22
2.4.7. Limitations in Calibration Range ................................................................. 23

2.5.

Performing Conversions ........................................................................................ 23
2.5.1. Single Conversion Mode ............................................................................. 23
2.5.2. Continuous Conversion Mode .................................................................... 24

2.6.

Using Multiple ADCs Synchronously ..................................................................... 25

2.7.

Conversion Output Coding .................................................................................... 25
2.7.1. Conversion Data Output Descriptions ........................................................ 26

2.8.

Digital Filter ............................................................................................................ 27

2.9.

Clock Generator ..................................................................................................... 28

2.10. Power Supply Arrangements ................................................................................. 28
2.11. Getting Started ....................................................................................................... 31
2.12. PCB Layout ............................................................................................................ 31

3.

PIN DESCRIPTIONS ...................................................................................................... 32

Clock Generator ......................................................................................................32
Control Pins and Serial Data I/O .............................................................................32
Measurement and Reference Inputs ......................................................................33
Power Supply Connections .....................................................................................33

4.

SPECIFICATION DEFINITIONS ..................................................................................... 33

5.

PACKAGE DRAWINGS .................................................................................................. 34

6.

ORDERING INFORMATION .......................................................................................... 35

7.

ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION .................... 35