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Features
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
I
2C 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
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 I
2C® 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) I
2C interface modes of operation. LM96080 includes an analog filter on the I
2C digital control lines that allows improved noise immunity and supports TIMEOUT reset function on SDA and SCL that prevents
I
2C bus lockup. Three I
2C 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 I
2C interface make it ideal for a wide range of applications. Operation is guaranteed over the temperature range of (−40)°C
≤ TA
≤ +125°C. The LM96080 is available in a 24-pin TSSOP package.
Key Specification
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Total Unadjusted Error
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±1% FS (max)
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Differential Non-Linearity
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±1LSb (max)
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Supply Voltage Range
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+3.0V to
+5.5V
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Supply Current (Operating)
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0.370 mA typ
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Supply Current (Shutdown)
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0.330 mA typ
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ADC Resolution
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10 Bits
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Temperature Resolution
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0.5/0.0625°C
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Temperature Accuracy
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± 3°C (max)
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Applications
Communications Infrastructure
System Thermal and Hardware Monitoring for Servers
Electronic Test Equipment and Instrumentation
Office Electronics
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Typical Application Block Diagram
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