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 ADC128D818s 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.
●The ADC can use either an internal 2.56-V reference or a variable external reference. An analog filter is included on the I2C digital control lines to provide improved noise immunity. The device also includes a TIME-OUT reset function on SDA and SCL to prevent I2C bus lock-up.
●The ADC128D818 operates from 3-V to 5.5-V power supply voltage range, –40°C to 125°C temperature range, and the device is available in a 16-pin TSSOP package.
● 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 ±A
● Temperature Resolution °C/LSb
● Temperature Accuracy (–40°C to 125°C) ±3°C
● Temperature Accuracy (–25°C to 100°C) ±2°C