• 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
• 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°C

• Communications Infrastructure
• Thermal and Hardware Server Monitors
• System Monitors
• Industrial and Medical Systems
• Electronic Test Equipment and Instrumentation
• Power Supply Monitoring and Supervision

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, 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.