1FEATURES

2• Local Temperature Sensing

• 7 Positive Voltage Inputs with 10-bit

Resolution

• 2 Programmable Fan Speed Monitoring Inputs

• 2.5 mV LSb and 2.56V Input Range

• Chassis Intrusion Detector Input

• WATCHDOG Comparison of All Monitored

Values

• Separate Input to Show Status in Interrupt

Status Register of Additional External

Temperature Sensors Such as the LM26/27,

LM56/57, LM73, or LM75

• I2C Serial Bus Interface Compatibility,

Supports Standard Mode, 100 kbits/s, and Fast

Mode, 400 kbits/s

• Shutdown Mode to Minimize Power

Consumption

• Programmable RST_OUT/OS Pin: RST_OUT

Provides a Reset Output; OS Provides an

Interrupt Output Activated by an

Overtemperature Shutdown Event

• Software and Pin Compatible with the LM80

APPLICATIONS

• Communications Infrastructure

• System Thermal and Hardware Monitoring for

Servers

• Electronic Test Equipment and

Instrumentation

• Office Electronics

KEY SPECIFICATIONS

• Total Unadjusted Error ±1 %FS (Max)

• Differential Non-Linearity ±1 Lsb (Max)

• Supply Voltage Range +3.0 V to +5.5 V

• Supply Current (Operating) 0.370 mA Typ

• Supply Current (Shutdown) 0.330 mA Typ

• ADC Resolution 10 Bits

• Temperature Resolution 0.5°C/0.0625°C

• Temperature Accuracy ±3°C (Max)

DESCRIPTION

LM96080, compatible to LM80, is a hardware monitor

that contains a 10-bit delta-sigma ADC capable of

measuring 7 positive voltages and local temperature.

The LM96080 also measures the speed of two fans

and includes other hardware monitoring on an I2C®

interface. The LM96080 includes a sequencer that

performs WATCHDOG window comparisons of all

measured values and its interrupt outputs become

active when any values exceed the programmed

limits.

The LM96080 is especially suited to interface to both

linear and digital temperature sensors. The 2.5 mV

LSb (least significant bit) and 2.56 volt input range is

ideal for accepting inputs from a linear sensor such

as the LM94022. The BTI is used as an input from

either digital or thermostat sensors such as LM73,

LM75, LM56, LM57, LM26, LM27, LM26LV, or other LM96080.

The LM96080 supports Standard Mode (Sm, 100

kbits/s) and Fast Mode (Fm, 400 kbits/s) I2C interface

modes of operation. LM96080 includes an analog

filter on the I2C digital control lines that allows

improved noise immunity and supports TIMEOUT

reset function on SDA and SCL that prevents I2C bus

lockup. Three I2C device address pins allow up to 8

parts on a single bus.

The LM96080's 3.0V to 5.5V supply voltage range,

low supply current, and I2C interface make it ideal for

a wide range of applications. Operation is ensured

over the temperature range of (−40)°C ≤ TA ≤

+125°C. The LM96080 is available in a 24-pin

TSSOP package.