Features 12-bit Resolution Delta-Sigma ADC Local Temperature Sensing Configurable Single-Ended and/or Pseudo-Diff. Inputs +2.56V 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 I 2C Serial Bus Interface Compatibility 9 Selectable Addresses TIMEOUT Reset Function to Prevent I 2C Bus Lock-Up Individual Channel Shutdown to Limit Power Consumption Deep Shutdown Mode to Minimize Power Consumption TSSOP 16-Lead Package Description The ADC128D818 I 2C ™ system monitor is designed for maximum flexibility. The system monitor can be configured for single-ended and/or pseudo-differential inputs. An on-board 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 kbits/s) and Fast Mode (Fm, 400kbits/s) I 2C 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 2.56V reference or a variable external reference. An analog filter is included on the I 2C digital control lines to provide improved noise immunity. The device also includes a TIMEOUT reset function on SDA and SCL to prevent I 2C bus lock-up. The ADC128D818 operates from +3.0 to +5.5V power supply voltage range, –40°C to 125°C temperature range, and the device is available in a 16-pin TSSOP package. Key Specification ■  ADC Resolution 12-bit ■  Supply Voltage Range +3.0V to +5.5V ■  Total Unadjusted Error –0.45/+0.2% ■  Integral Non-Linearity ±1LSb ■  Differential Non-Linearity ±1LSb ■  Operating Current 0.56 mA ■  Deep Shutdown Current 10 µA ■  Temperature Resolution 0.5°C/LSb ■  Temp. Accuracy (–40°C to 125°C) ± 3°C ■  Temp. Accuracy (–25°C to 100°C) ± 2°C Applications Communications Infrastructure Thermal / Hardware Server Monitors System Monitors Industrial and Medical Systems Electronic Test Equipment and Instrumentation Power Supply Monitoring / Supervision

Typical Application Block Diagram

Typical Application click for larger image Typical Application Block Diagram	Block Diagram click for larger image Simplified Block Diagram
Typical Performance click for larger image

Parameters Values Pin and Function Compatible Family None Resolution 12 bits Input Channels 8 Sample Rate Range (sps) 10 Interface Type I2C Differential Input Yes Power Down, typ. at 3.6V 1728 uW Operating Power, typ at 3.6V, max ksps 2.01 mW INL (LSB) 1 DNL (LSB) 1 Max KSample Rate 0.01 ksps Min Supply Voltage 3 Volt Max Supply Voltage 5.5 Volt Reference Source Internal Temperature Min -40 deg C Temperature Max 125 deg C Power Down Yes Input Sample/Hold Yes Special Features Temp Sens, INT, Watchdog, Int/Ext Vref Data Converter Type ADC Max Sample Rate 0.00001 MSPS Automotive No PowerWise No

Datasheets

Title		Size	Date	Other Language
	ADC128D818 12-Bit, 8-Channel, ADC System Monitor with Temperature Sensor, Internal/External Reference, and I2C Interface	747 Kbytes	10-Jan-11

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
ADC128D818CIMT/NOPB RoHS Status	TSSOP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 39 AVNET-EM Worldwide 184 DIGI-KEY Worldwide 157 FARNELL Europe and Asia 38 MOUSER Worldwide 26 NEWARK Americas 38 TAYLOR Americas 39	$2.95 each at 1K+ pcs	rail of 92
ADC128D818CIMTX/NOPB RoHS Status	TSSOP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$2.95 each at 1K+ pcs	reel of 2500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for ADC128D818.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for ADC128D818 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
ADC128D818EB/NOPB	ADC128D818 Evaluation Board	Full production Lead Free (RoHS)	Distributor Region Qty	CALL	N/A
Description: The ADC128D818EB is the evaluation board for ADC128D818, an ADC system monitor with temperature sensor, internal/external reference, I2C interface, local temperature sensor, WATCHDOG window comparators, and interrupt output. The ADC128D818EB connects via USB to a PC and is controlled by the SensorEval software. SensorEval software allows easy access and control of the ADC128D818s registers and reports voltage and temperature readings. The ADC128D818EB board is powered through the USB connection and no other external power sources are required. Features: 12-bit Resolution Delta-Sigma ADC Local Temperature Sensing Configurable Single-Ended and/or Pseudo-diff. Inputs. +2.56V Internal VREF or Variable External VREF. WATCHDOG Window Comparator 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 TIMEOUT Reset Function to Prevent I2C Bus Lock-Up Indevidual Channel Shutdown to Limit Power consumption Deep Shutdown Mode to Minimize Power Consumption TSSOP 16-Lead Package Contents: Evaluation Board User`s Guide Thank you letter Evaluation board license agreement

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
ADC128D818CIMT/NOPB	56.74	TSSOP	16	1	260	Detail	N/A	N/A	NSUZXYTT 128D818 CIMT
ADC128D818CIMTX/NOPB	56.74	TSSOP	16	1	260	Detail	N/A	N/A	NSUZXYTT 128D818 CIMT

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for ADC128D818.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for ADC128D818 is located at RoHS Status.

Design Tools

Title	Size	Date
ADC128D818EB User's Guide

CAD Symbols and Models N/A

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
ADC128D818CIMT	CMOS7	0	21301	0	0	1584000	3	449464325
ADC128D818CIMTX	CMOS7	0	21301	0	0	1584000	3	449464325

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for ADC128D818.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for ADC128D818 is located at RoHS Status.

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Power Management Solutions for High Power Systems Date: 2010-02-19 Length: 1:05:45