CS5530-CSZ

CS5530-CSZ Datasheet

CS5530

Part	Datasheet
CS5530-CSZ	CS5530-CSZ (pdf)

PDF Datasheet Preview
CS5530 24-bit ADC with Ultra-low-noise Amplifier Features & Description Chopper-stabilized Instrumentation Amplifier, 64X • 12 Hz No 1/f noise • 500 pA Input Current Digital Gain Scaling up to 40x Delta-sigma Analog-to-digital Converter • Linearity Error FS • Noise Free Resolution Up to 19 bits Scalable VREF Input Up to Analog Supply Simple Three-wire Serial Interface • SPI and Microwire Compatible • Schmitt-trigger on Serial Clock SCLK Onboard Offset and Gain Calibration Registers Selectable Word Rates to 3,840 Sps Selectable 50 or 60 Hz Rejection Power Supply Configurations • VA+ = +5 V VA- = 0 V VD+ = +3 V to +5 V • VA+ = V VA- = V VD+ = +3 V to +5 V • VA+ = +3 V VA- = -3 V VD+ = +3 V The CS5530 is a highly integrated Analog-to-Digital Converter ADC which uses charge-balance techniques to achieve 24-bit performance. The ADC is optimized for measuring low-level unipolar or bipolar signals in weigh scale, process control, scientific, and medical applications. To accommodate these applications, the ADC includes a very-low-noise, chopper-stabilized instrumentation amplifier 12 Hz with a gain of 64X. This device also includes a fourth-order modulator followed by a digital filter which provides twenty selectable output word rates of 15, 25, 30, 50, 60, 100, 120, 200, 240, 400, 480, 800, 960, 1600, 1920, 3200, and 3840 Sps MCLK = MHz . To ease communication between the ADC and a microcontroller, the converter includes a simple three-wire serial interface which is SPI and Microwire compatible with a Schmitt-trigger input on the serial clock SCLK . High dynamic range, programmable output rates, and flexible power supply options make this device an ideal solution for weigh scale and process control applications. ORDERING INFORMATION See page VA+ C1 VREF+ VREF- AIN1+ AIN1- DIFFERENTIAL 4TH ORDER MODULATOR PROGRAMMABLE SINC FIR FILTER SERIAL INTERFACE CS SDI SDO SCLK LATCH CLOCK GENERATOR CALIBRATION SRAM/CONTROL LOGIC OSC1 OSC2 DGND Advance Product Information This document contains information for a new product. Cirrus Logic reserves the right to modify this product without notice. Copyright Cirrus Logic, Inc. 2006 All Rights Reserved NOV ‘06 DS742A4 CS5530 TABLE OF CONTENTS CHARACTERISTICS AND SPECIFICATIONS 4 ANALOG 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 GENERAL DESCRIPTION 11 Analog Input 11 Analog Input Span 12 Voltage Noise Density Performance 12 No Offset DAC 12 Overview of ADC Register Structure and Operating Modes 12 System Initialization 12 Command Register Descriptions 14 Serial Port Interface 16 Reading/Writing On-Chip Registers 17 Configuration Register 17 Power Consumption 17 System Reset Sequence 17 Input Short 17 Voltage Reference Select 17 Output Latch Pins 18 Filter Rate Select 18 Word Rate Select 18 Unipolar/Bipolar Select 18 Open Circuit Detect 18 Configuration Register Description 19 Calibration 21 Calibration Registers 21 Gain Register 21 Offset Register 21 Performing Calibrations 22 System Calibration 22 Calibration Tips 22 Limitations in Calibration Range 23 Performing Conversions 23 Single Conversion Mode 23 Continuous Conversion Mode 24 Using Multiple ADCs Synchronously 25 Conversion Output Coding 25 Conversion Data Output Descriptions 26 Digital Filter 27 Clock Generator 28 Power Supply Arrangements 28 Getting Started 31 PCB Layout 31 PIN DESCRIPTIONS 32 Clock Generator Control Pins and Serial Data I/O Measurement and Reference Inputs Power Supply Connections SPECIFICATION DEFINITIONS 33 PACKAGE DRAWINGS 34 ORDERING INFORMATION 35 ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION 35 DS742A4 CS5530 LIST OF FIGURES Figure SDI Write Timing Not to 10 Figure SDO Read Timing Not to 10 Figure Front End 11 Figure Input Model for AIN+ and AIN- 11 Figure Measured Voltage Noise 12 Figure Measured Voltage Noise 12 Figure CS5530 Register Diagram 13 Figure Command and Data Word Timing 16 Figure Input Reference Model when VRS = 1 18 Figure Input Reference Model when VRS = 0 18 Figure System Calibration of Offset 22 Figure System Calibration of Gain 22 Figure Synchronizing Multiple 25 Figure Digital Filter Response Word Rate = 60 Sps 27 Figure 120 Sps Filter Magnitude Plot to 120 Hz 27 Figure 120 Sps Filter Phase Plot to 120 Hz 27 Figure Z-Transforms of Digital 27 Figure On-chip Oscillator 28 Figure CS5530 Configured with a Single +5 V Supply 29 Figure CS5530 Configured with V Analog 29 Figure CS5530 Configured with ±3 V Analog 30 LIST OF TABLES Table Conversion Timing for Single Mode 24 Table Conversion Timing for Continuous 24 Table Output Coding 25 DS742A4 CHARACTERISTICS AND SPECIFICATIONS ANALOG CHARCTERISTICS VA+, VD+ = 5 V ±5% VREF+ = 5 V VA-, VREF-, DGND = 0 V MCLK = MHz OWR Output Word Rate = 60 Sps Bipolar Mode See Notes 1 and CS5530 Accuracy Linearity Error No Missing Codes Bipolar Offset Unipolar Offset Offset Drift Bipolar full-scale Error Unipolar full-scale Error full-scale Drift Parameter CS5530-CS Max Unit 24 Notes 3 and 4 Note 4 - ±16 ±32 10 ±8 ±16 2 ±32 ±64 ±31 ±62 %FS Bits LSB24 nV/°C ppm/°C Notes Applies after system calibration at any temperature within -20 °C to +70 °C. Specifications guaranteed by design, characterization, and/or test. LSB is 24 bits. This specification applies to the device only and does not include any effects by external parasitic thermocouples. Drift over specified temperature range after calibration at power-up at 25 °C. DS742A4 CS5530 ANALOG CHARACTERISTICS Continued See Notes 1 and Parameter Analog Input Common Mode + Signal on AIN+ or AIN- Bipolar/Unipolar Mode VA- + CVF Current on AIN+ or AIN- Input Current Noise Open Circuit Detect Current Common Mode Rejection 50, 60 Hz Input Capacitance Voltage Reference Input Range ORDERING INFORMATION Model Number Bits Channels Linearity Error Max Temperature Range Package CS5530-CS -20°C to +70°C 20-pin Plastic SSOP CS5530-CSZ -20°C to +70°C 20-pin Plastic SSOP, Lead Free ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION Model Number CS5530-CS CS5530-CSZ Peak Reflow Temp 240 °C 260 °C MSL Rating 2 3 Max Floor Life 365 Days 7 Days DS742A4 DATE OCT 2006 NOV 2006 NOV 2006 NOV 2006 CHANGES Advance Release Updated power consumption values. Updated noise density plot. Updated temperature range specification. CS5530 Contacting Cirrus Logic Support For all product questions and inquiries contact a Cirrus Logic Sales Representative. To find the one nearest to you go to IMPORTANT NOTICE "Advance" product information describes products that are in development and subject to development changes. Cirrus Logic, Inc. and its subsidiaries “Cirrus” believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS” without warranty of any kind express or implied . Customers are advised to obtain the latest version of relevant infor mation to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights, copyrights trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPER TY OR ENVIRONMENTAL DAMAGE “CRITICAL APPLICATIONS” . CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE IN AIRCRAFT SYSTEMS, MILITARY APPLICATIONS, PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES LIFE SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER'S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR CUSTOMER'S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOM ER AGREES, BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS' FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES. Cirrus Logic, Cirrus, and the Cirrus Logic logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks o service marks of their respective owners. SPI is a trademark of Motorola, Inc. Microwire is a trademark of National Semiconductor Corporation. DS742A4

PDF Datasheet Preview

CS5530
24-bit ADC with Ultra-low-noise Amplifier

Features & Description

Chopper-stabilized Instrumentation Amplifier, 64X
• 12 Hz No 1/f noise
• 500 pA Input Current

Digital Gain Scaling up to 40x

Delta-sigma Analog-to-digital Converter
• Linearity Error FS
• Noise Free Resolution Up to 19 bits

Scalable VREF Input Up to Analog Supply Simple Three-wire Serial Interface
• SPI and Microwire Compatible
• Schmitt-trigger on Serial Clock SCLK

Onboard Offset and Gain Calibration Registers

Selectable Word Rates to 3,840 Sps

Selectable 50 or 60 Hz Rejection

Power Supply Configurations
• VA+ = +5 V VA- = 0 V VD+ = +3 V to +5 V
• VA+ = V VA- = V VD+ = +3 V to +5 V
• VA+ = +3 V VA- = -3 V VD+ = +3 V

The CS5530 is a highly integrated Analog-to-Digital Converter ADC which uses charge-balance techniques to achieve 24-bit performance. The ADC is optimized for measuring low-level unipolar or bipolar signals in weigh scale, process control, scientific, and medical applications.

To accommodate these applications, the ADC includes a very-low-noise, chopper-stabilized instrumentation amplifier 12 Hz with a gain of 64X. This device also includes a fourth-order modulator followed by a digital filter which provides twenty selectable output word rates of 15, 25, 30, 50, 60, 100, 120, 200, 240, 400, 480, 800, 960, 1600, 1920, 3200, and 3840 Sps MCLK = MHz .

To ease communication between the ADC and a microcontroller, the converter includes a simple three-wire serial interface which is SPI and Microwire compatible with a Schmitt-trigger input on the serial clock SCLK .

High dynamic range, programmable output rates, and flexible power supply options make this device an ideal solution for weigh scale and process control applications.
ORDERING INFORMATION See page

VA+ C1

VREF+ VREF-

AIN1+ AIN1-

DIFFERENTIAL 4TH ORDER

MODULATOR

PROGRAMMABLE SINC FIR FILTER

SERIAL INTERFACE

CS SDI SDO SCLK

LATCH

CLOCK GENERATOR

CALIBRATION SRAM/CONTROL

LOGIC

OSC1 OSC2

DGND

Advance Product Information

This document contains information for a new product. Cirrus Logic reserves the right to modify this product without notice.

Copyright Cirrus Logic, Inc. 2006 All Rights Reserved

NOV ‘06 DS742A4

CS5530

TABLE OF CONTENTS

CHARACTERISTICS AND SPECIFICATIONS 4 ANALOG 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

GENERAL DESCRIPTION 11 Analog Input 11 Analog Input Span 12 Voltage Noise Density Performance 12 No Offset DAC 12 Overview of ADC Register Structure and Operating Modes 12 System Initialization 12 Command Register Descriptions 14 Serial Port Interface 16 Reading/Writing On-Chip Registers 17 Configuration Register 17 Power Consumption 17 System Reset Sequence 17 Input Short 17 Voltage Reference Select 17 Output Latch Pins 18 Filter Rate Select 18 Word Rate Select 18 Unipolar/Bipolar Select 18 Open Circuit Detect 18 Configuration Register Description 19 Calibration 21 Calibration Registers 21 Gain Register 21 Offset Register 21 Performing Calibrations 22 System Calibration 22 Calibration Tips 22 Limitations in Calibration Range 23 Performing Conversions 23 Single Conversion Mode 23 Continuous Conversion Mode 24 Using Multiple ADCs Synchronously 25 Conversion Output Coding 25 Conversion Data Output Descriptions 26 Digital Filter 27 Clock Generator 28 Power Supply Arrangements 28 Getting Started 31 PCB Layout 31

PIN DESCRIPTIONS 32 Clock Generator Control Pins and Serial Data I/O Measurement and Reference Inputs Power Supply Connections
SPECIFICATION DEFINITIONS 33 PACKAGE DRAWINGS 34 ORDERING INFORMATION 35 ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION 35

DS742A4

CS5530

LIST OF FIGURES

Figure SDI Write Timing Not to 10 Figure SDO Read Timing Not to 10 Figure Front End 11 Figure Input Model for AIN+ and AIN- 11 Figure Measured Voltage Noise 12 Figure Measured Voltage Noise 12 Figure CS5530 Register Diagram 13 Figure Command and Data Word Timing 16 Figure Input Reference Model when VRS = 1 18 Figure Input Reference Model when VRS = 0 18 Figure System Calibration of Offset 22 Figure System Calibration of Gain 22 Figure Synchronizing Multiple 25 Figure Digital Filter Response Word Rate = 60 Sps 27 Figure 120 Sps Filter Magnitude Plot to 120 Hz 27 Figure 120 Sps Filter Phase Plot to 120 Hz 27 Figure Z-Transforms of Digital 27 Figure On-chip Oscillator 28 Figure CS5530 Configured with a Single +5 V Supply 29 Figure CS5530 Configured with V Analog 29 Figure CS5530 Configured with ±3 V Analog 30

LIST OF TABLES

Table Conversion Timing for Single Mode 24 Table Conversion Timing for Continuous 24 Table Output Coding 25

DS742A4

CHARACTERISTICS AND SPECIFICATIONS

ANALOG CHARCTERISTICS

VA+, VD+ = 5 V ±5% VREF+ = 5 V VA-, VREF-, DGND = 0 V MCLK = MHz OWR Output Word Rate = 60 Sps Bipolar Mode See Notes 1 and

CS5530

Accuracy Linearity Error No Missing Codes Bipolar Offset

Unipolar Offset

Offset Drift Bipolar full-scale Error Unipolar full-scale Error full-scale Drift

Parameter

CS5530-CS

Max Unit
24 Notes 3 and 4 Note 4 -
±16 ±32
10 ±8 ±16 2
±32
±64
±31 ±62
%FS Bits LSB24 nV/°C ppm/°C

Notes Applies after system calibration at any temperature within -20 °C to +70 °C. Specifications guaranteed by design, characterization, and/or test. LSB is 24 bits. This specification applies to the device only and does not include any effects by external parasitic thermocouples. Drift over specified temperature range after calibration at power-up at 25 °C.

DS742A4

CS5530

ANALOG CHARACTERISTICS Continued

See Notes 1 and

Parameter

Analog Input

Common Mode + Signal on AIN+ or AIN- Bipolar/Unipolar Mode VA- +

CVF Current on AIN+ or AIN-

Input Current Noise

Open Circuit Detect Current

Common Mode Rejection
50, 60 Hz

Input Capacitance

Voltage Reference Input

Range
ORDERING INFORMATION

Model Number Bits Channels Linearity Error Max Temperature Range

Package

CS5530-CS
-20°C to +70°C 20-pin Plastic SSOP

CS5530-CSZ
-20°C to +70°C 20-pin Plastic SSOP, Lead Free

ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION

Model Number CS5530-CS CS5530-CSZ

Peak Reflow Temp 240 °C 260 °C

MSL Rating 2 3

Max Floor Life 365 Days 7 Days

DS742A4

DATE OCT 2006 NOV 2006 NOV 2006 NOV 2006

CHANGES Advance Release Updated power consumption values. Updated noise density plot. Updated temperature range specification.

CS5530

Contacting Cirrus Logic Support

For all product questions and inquiries contact a Cirrus Logic Sales Representative.

To find the one nearest to you go to

IMPORTANT NOTICE
"Advance" product information describes products that are in development and subject to development changes.

Cirrus Logic, Inc. and its subsidiaries “Cirrus” believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS” without warranty of any kind express or implied . Customers are advised to obtain the latest version of relevant infor mation to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights, copyrights trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPER TY OR ENVIRONMENTAL DAMAGE “CRITICAL APPLICATIONS” . CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE IN AIRCRAFT SYSTEMS, MILITARY APPLICATIONS, PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES LIFE SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER'S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR CUSTOMER'S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOM ER AGREES, BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS' FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES.

Cirrus Logic, Cirrus, and the Cirrus Logic logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks o service marks of their respective owners.

SPI is a trademark of Motorola, Inc.

Microwire is a trademark of National Semiconductor Corporation.

DS742A4

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived CS5530-CSZ Datasheet file may be downloaded here without warranties.

Datasheet ID: CS5530-CSZ 523198