Single-Supply, Multichannel, 125 kSPS, 24-Bit, Sigma-Delta ADC with 10 V Inputs Data Sheet AD4115 FEATURES GENERAL DESCRIPTION 24-bit ADC with integrated AFE The AD4115 is a low power, low noise, 24-bit, sigma-delta (-) Fast and flexible output rate: 2.5 SPS to 125 kSPS analog-to-digital converter (ADC) that integrates an analog Channel scan data rate of 24,845 SPS per channel front end (AFE) for eight fully differential or 16 single-ended, (40.25 s settling) high impedance (1 M), bipolar, 10 V voltage inputs. 85 dB common mode rejection of 50 Hz and 60 Hz at The AD4115 integrates key analog and digital signal 20 SPS per channel conditioning blocks to configure eight individual setups for 10 V inputs, either 8 differential or 16 single-ended each analog input channel in use. The AD4115 features a VIN pin absolute maximum rating 65 V maximum channel scan rate of 24,845 kSPS (40.25 s) for fully Absolute input pin voltage up to 20 V settled data. Minimum 1 M impedance The embedded 2.5 V, low drift (5 ppm/C), band gap internal On-chip 2.5 V reference reference (with output reference buffer) reduces the external 0.12% initial accuracy at 25C, 5 ppm/C (typical) drift component count. Internal or external clock Power supplies The digital filter allows flexible settings, including simultaneous AVDD = 4.5 V to 5.5 V 50 Hz and 60 Hz rejection at a 27.27 SPS output data rate. The IOVDD = 2 V to 5.5 V user can select different filter settings depending on the Total current consumption AVDD + IOVDD (IDD) = 10.4 mA requirements of each channel in the application. The automatic Temperature range: 40C to +105C channel sequencer enables the ADC to switch through each 3-wire or 4-wire serial digital interface (Schmitt trigger on SCLK) enabled channel. SPI, QSPI, MICROWIRE, and DSP compatible The precision performance of the AD4115 is achieved by APPLICATIONS integrating the proprietary iPassives technology from Analog Devices, Inc. The AD4115 is factory calibrated to achieve a high Process control degree of specified accuracy. Programmable logic controller (PLC) and distributed control system (DCS) modules The AD4115 operates with a single power supply that allows Instrumentation and measurement simplified use in galvanically isolated applications. The specified operating temperature range is 40C to +105C. The AD4115 is housed in a 40-lead, 6 mm 6 mm LFCSP. Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. Tel: 781.329.4700 2020 Analog Devices, Inc. All rights reserved. No license is granted by implication or otherwise under any patent or patent rights of Analog Technical Support www.analog.com Devices. Trademarks and registered trademarks are the property of their respective owners. AD4115 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Calibration Modes ..................................................................... 32 Applications ...................................................................................... 1 Digital Interface .............................................................................. 33 General Description ......................................................................... 1 Checksum Protection ................................................................ 33 Revision History ............................................................................... 3 CRC Calculation ......................................................................... 34 Functional Block Diagram .............................................................. 4 Integrated Functions ...................................................................... 36 Specifications .................................................................................... 5 General-Purpose Input/Output ............................................... 36 Timing Characteristics ................................................................ 7 External Multiplexer Control ................................................... 36 Absolute Maximum Ratings ........................................................... 9 Delay ............................................................................................ 36 Thermal Resistance ...................................................................... 9 16-Bit and 24-Bit Conversions ................................................. 36 Electrostatic Discharge (ESD) Ratings ...................................... 9 DOUT RESET ........................................................................... 36 ESD Caution.................................................................................. 9 Synchronization ......................................................................... 36 Pin Configuration and Function Descriptions .......................... 10 Error Flags ................................................................................... 37 Typical Performance Characteristics ........................................... 12 DATA STAT Function ............................................................. 37 Theory of Operation ...................................................................... 15 IOSTRENGTH Function .......................................................... 37 Power Supplies ............................................................................ 16 Internal Temperature Sensor ................................................... 38 Digital Communication ............................................................ 16 Applications Information ............................................................. 39 AD4115 Reset .............................................................................. 16 Grounding and Layout .............................................................. 39 Configuration Overview ............................................................ 18 Register Summary .......................................................................... 40 Noise Performance and Resolution ............................................. 21 Register Details ............................................................................... 42 Circuit Description ......................................................................... 23 Communications Register ........................................................ 42 Muliplexer ................................................................................... 23 Status Register ............................................................................. 43 Voltage Inputs ............................................................................. 23 ADC Mode Register ................................................................... 44 Absolute Input Pin Voltages ..................................................... 24 Interface Mode Register ............................................................ 45 Data Output Coding .................................................................. 24 Register Check ............................................................................ 46 AD4115 Reference Options ...................................................... 24 Data Register ............................................................................... 46 Buffered Reference Input .......................................................... 25 GPIO Configuration Register ................................................... 47 Clock Source ............................................................................... 25 ID Register .................................................................................. 48 Digital Filter .................................................................................... 27 Channel Register 0 to Channel Register 15 ............................ 48 Sinc5 + Sinc1 Filter .................................................................... 27 Setup Configuration Register 0 to Setup Configuration Register 7 ..................................................................................... 49 Sinc3 Filter ................................................................................... 27 Filter Configuration Register 0 to Filter Configuration Single-Cycle Settling Mode ....................................................... 27 Register 7 ..................................................................................... 50 Enhanced 50 Hz and 60 Hz Rejection Filters ......................... 28 Offset Register 0 to OFFSET Register 7 .................................. 51 Operating Modes ............................................................................ 30 Gain Register 0 to Gain Register 7 ........................................... 51 Continuous Conversion Mode ................................................. 30 Outline Dimensions ....................................................................... 52 Continuous Read Mode ............................................................ 30 Ordering Guide .......................................................................... 52 Single Conversion Mode ........................................................... 30 Standby Mode and Power-Down Mode ................................. 32 Rev. A Page 2 of 52