CS5529 16-bit, Programmable ADC with 6-bit Latch Features General Description The 16-bit CS5529 is a low-power, programmable z Delta-sigma Analog-to-digital Converter ADC (Analog-to-Digital Converter), which includes - Linearity Error: 0.0015%FS coarse/fine charge buffers, a fourth-order modulator, - Noise-free Resolution: 16-Bits a calibration microcontroller, a digital filter with program- z 2.5 V Bipolar/Unipolar Buffered Input Range mable decimation rates, a 6-bit output latch, and a three- wire serial interface. The ADC is designed to operate z 6-bit Output Latch from single or dual analog supplies and a single digital z Eight Digital Filters supply. - Selectable Output Word Rates The digital filter is programmable with output update - Output Settles in One Conversion Cycle rates between 1.88 Hz to 101 Sps. These output rates - 50/60 Hz 3 Hz Simultaneous Rejection are specified for XIN = 32.768 kHz. Output word rates z Simple Three-wire Serial Interface can be increased by approximately 3X by using XIN = 100 kHz. The filter is designed to settle to full accuracy - SPI and Microwire Compatible for the selected output word rate in one conversion. - Schmitt Trigger on Serial Clock (SCLK) When operated at word rates of 15 Sps or less, the filter z System/Self-calibration with R/W Registers rejects both 50 Hz and 60 Hz simultaneously. z Power Supply Configurations Low power, single conversion settling time, programma- - VA+ = +5 V VA- = 0 V VD+ = +3 V to +5 V ble output rates, and the ability to handle negative input - VA+ = +2.5 V VA- = -2.5 V VD+ = +3 V to +5 V signals make this single- or dual-supply product an ideal solution for isolated and non-isolated applications. - VA+ = +3.0 V VA- = -3.0 V VD+ = +3.0 V z Low Power Consumption: 2.6 mW ORDERING INFORMATION See page 29. VA+ VA- DGND VD+ AIN+ Digital Filter Calibration 1X CS Differential AIN- Register 4th Order Delta-Sigma SCLK VREF+ Modulator 1X Control VREF- Register SDI Output SDO Clock Register Calibration Latch Gen. Calibration C Memory A0 A1 D0 D1 D2 D3 XIN XOUT Copyright Cirrus Logic, Inc. 2005 AUG 05 CS5529 TABLE OF CONTENTS CHARACTERISTICS & SPECIFICATIONS ........................................................ 4 ANALOG CHARACTERISTICS................................................................... 4 ANALOG CHARACTERISTICS................................................................... 5 5V DIGITAL CHARACTERISTICS .............................................................. 6 3 V DIGITAL CHARACTERISTICS ............................................................. 6 DYNAMIC CHARACTERISTICS ................................................................. 6 ABSOLUTE MAXIMUM RATINGS .............................................................. 7 SWITCHING CHARACTERISTICS ............................................................. 8 GENERAL DESCRIPTION ................................................................................ 10 Analog Input ............................................................................................. 10 Analog Input Model ............................................................................ 10 Voltage Reference Input Model .......................................................... 10 Serial Port ................................................................................................. 11 Command Register Descriptions ........................................................ 12 Serial Port Interface ........................................................................... 13 Serial Port Initialization ....................................................................... 15 System Initialization ........................................................................... 15 Configuration Register .............................................................................. 15 Latch Output Pins ............................................................................... 15 Power Consumption ........................................................................... 15 Output Word Rate .............................................................................. 16 Digital Filter ........................................................................................ 16 Clock Generator ................................................................................. 16 Reset System ..................................................................................... 16 Port Flag ............................................................................................. 17 Calibration ..........................................................................................17 Calibration Registers ................................................................... 17 Offset Register ...................................................................... 17 Gain Register ........................................................................ 18 Self Calibration ............................................................................ 18 System Calibration ....................................................................... 18 Limitations in Calibration Range .................................................. 19 Calibration Tips ............................................................................ 19 Configuration Register Descriptions ................................................. 20 Performing Conversions ........................................................................... 21 Performing Conversions with PF bit = 0 ............................................. 21 Performing Conversions with PF bit = 1 ............................................. 21 Single Conversion ........................................................................ 21 Continuous Conversions .............................................................. 21 Output Coding .................................................................................... 22 ............................................................................................................ 22 Power Supply Arrangements .................................................................... 23 Getting Started ......................................................................................... 25 PCB Layout .............................................................................................. 25 PIN DESCRIPTIONS ......................................................................................... 26 SPECIFICATION DEFINITIONS ........................................................................ 28 ORDERING INFORMATION .............................................................................. 29 ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION ...... 29 PACKAGE DIMENSIONS ................................................................................. 30 2 DS246F5