TI Chips ADC128D818CIMTX/NOPB ADC128D818 12-Bit, 8-Channel, ADC System Monitor With Temperature Sensor
Features
12-Bit Resolution Delta-Sigma ADC Local Temperature Sensing Configurable Single-Ended and/or Pseudo-Diff. Inputs 2.56-V Internal VREF or Variable External VREF WATCHDOG Window Comparators with Status and Mask Registers of All Measured Values Independent Registers for Storing Measured Values \(\overline{\text{INT}}\) Output Notifies Microprocessor of Error Event I²C Serial Bus Interface Compatibility 9 Selectable Addresses TIME-OUT Reset Function to Prevent I²C Bus Lock-Up Individual Channel Shutdown to Limit Power Consumption Deep Shutdown Mode to Minimize Power Consumption TSSOP 16-Lead Package Key Specifications – ADC Resolution 12-Bit – Supply Voltage Range 3 V to 5.5 V – Total Unadjusted Error −0.45%/+0.2% – Integral Non-Linearity ±1 LSb – Differential Non-Linearity ±1 LSb – Operating Current 0.56 mA – Deep Shutdown Current 10 μA – Temperature Resolution °C/LSb – Temperature Accuracy (−40°C to 125°C) ±3°C – Temperature Accuracy (−25°C to 100°C) ±2°C2
Applications Communications Infrastructure Thermal and Hardware Server Monitors System Monitors Industrial and Medical Systems Electronic Test Equipment and Instrumentation Power Supply Monitoring and Supervision
Description
The ADC128D818 I²C system monitor is designed for maximum flexibility. The system monitor can be configured for single-ended and/or pseudo-differential inputs. An onboard temperature sensor, combined with WATCHDOG window comparators, and an interrupt output pin, \(\overline{\text{INT}}\), allow easy monitoring and out-of-range alarms for every channel. A high performance internal reference is also available to provide for a complete solution in the most difficult operating conditions.The ADC128D818’s 12-bit delta-sigma ADC supports Standard Mode (Sm, 100 kbps) and Fast Mode (Fm, 400 kbps) I²C interfaces. The ADC128D818 includes a sequencer to control channel conversions and stores all converted results in independent registers for easy microprocessor retrieval. Unused channels can be shut down independently to conserve power.