مدار مجتمع (آی سی) آی سی‌کاربرد ویژه

Product Attributes

Introduction

The MAX22005 is a twelve-channel industrial-grade analog input voltage-mode device that can also be configured as analog-input current-mode device using an external precision resistor per channel. It can also operate as configurable analog-input using an external precision resistor and low-cost switch per channel. Input channels can be used as twelve single-ended inputs, or six differential inputs, or up to eight multichannel configurable differential inputs. In total, the device supports up to 26 different configurations. The MAX22005 features an integrated 24-bit delta-sigma ADC that is shared between all channels. The ADC can be used with either an integrated 5ppm/℃ precision reference or an external reference. Standard industrial analog input voltage ranges are converted to the ADC input voltage range using high-voltage, zero-drift input amplifiers. All input ports are robustly protected up to ±36V reverse polarity and ±2kV surge pulses without the need of TVS diodes. Eight general-purpose digital I/O (GPIO) ports are available for common use, or they can be used to control external switches for configurable inputs. The MAX22005 is factory calibrated with best-in-class system performance of less than 0.05% FSR Total-Unadjusted-Error (TUE) over temperature. The host communicates with the MAX22005 through a high-speed 30MHz SPI bus for all configurations and information management, as well as for acquiring conversion results. An optional 8-bit CRC enhances the reliability of the SPI interface, protecting against all 8-bit bursts, as well as all double-bit errors. The MAX22005 operates from 2.7V to 3.6V analog and digital supplies, and up to ±24V high-voltage supplies. The MAX22005 is available in 48-pin LGA package and operates over the -40℃ to +125℃ industrial temperature range.

Features

• Enables More Robust and Reliable Systems
• ±36V High-Voltage Protection for All Input Ports
• 2kV HBM ESD Protection of All Pins
• ±2kV Surge Protection (with External 5kΩ Resistor)
• CRC Detection for Robust Serial Communication
• Watchdog Timer
• Software Configurability
• ±12.5V Analog Input-Voltage Mode
• ±25mA Analog Input-Current Mode Using External Sense Resistor
• Configurable Inputs Using External Sense Resistor and Low-Cost Switches
• Best-in-Class System Accuracy
• 0.02% FSR at 25℃ Factory Calibrated
• 0.05% FSR over ±50℃ from 25℃ Factory Calibration
• Maximum of 30nA Input Leakage
• 5ppm/℃ Internal Reference
• Additional Features
• Internal or External ADC Reference
• Eight GPIO Ports
• 48.5mW Low Power Dissipation with ±5V Supply
• 30MHz SPI/QSPI/DSP-Compatible Serial Interface
• Operating Temperature -40℃ to +125℃
• 7.5mmx7mm 48 -pin LGA package

Applications

• Programmable Logic Controllers (PLC)
• Programmable Automation Controllers (PAC)
• Distributed Control Systems (DCS)