adc128d818cimtx National Semiconductor Corporation, adc128d818cimtx Datasheet

adc128d818cimtx

Manufacturer Part Number

adc128d818cimtx

Description

12-bit, 8-channel, Adc System Monitor With Temperature Sensor, Internal/external Reference, And I2c Interface

Manufacturer

National Semiconductor Corporation

Datasheet

1.ADC128D818CIMTX.pdf (38 pages)

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12-Bit, 8-Channel, ADC System Monitor with Temperature

Sensor, Internal/External Reference, and I

1.0 General Description

The ADC128D818 I

imum 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 Stan-

dard Mode (Sm, 100 kbits/s) and Fast Mode (Fm, 400kbits/s)

control channel conversions and stores all converted results

in independent registers for easy microprocessor retrieval.

Unused channels can be shut down independently to con-

serve power.

The ADC can use either an internal 2.56V reference or a vari-

able external reference. An analog filter is included on the

The device also includes a TIMEOUT reset function on SDA

and SCL to prevent I

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.

2.0 Applications

■

5.0 Typical Application

C® is a registered trademark of the Philips Corporation.

C interfaces. The ADC128D818 includes a sequencer to

C digital control lines to provide improved noise immunity.

Communications Infrastructure

Thermal / Hardware Server Monitors

System Monitors

Industrial and Medical Systems

Electronic Test Equipment and Instrumentation

Power Supply Monitoring / Supervision

C ™ system monitor is designed for max-

C bus lock-up.

300963

ADC128D818

3.0 Features

■

4.0 Key Specifications

■

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

9 Selectable Addresses

TIMEOUT Reset Function to Prevent I

Individual Channel Shutdown to Limit Power Consumption

Deep Shutdown Mode to Minimize Power Consumption

TSSOP 16-Lead Package

ADC Resolution

Supply Voltage Range

Total Unadjusted Error

Integral Non-Linearity

Differential Non-Linearity

Operating Current

Deep Shutdown Current

Temperature Resolution

Temp. Accuracy (–40°C to 125°C)

Temp. Accuracy (–25°C to 100°C)

C Serial Bus Interface Compatibility

C Interface

C Bus Lock-Up

30096301

+3.0V to +5.5V

www.national.com

–0.45/+0.2%

April 1, 2010

0.5°C/LSb

0.56 mA

±1LSb

10 µA

± 3°C

± 2°C

12-bit

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