Datasheet Texas Instruments LM81CIMT-3/NOPB — Datenblatt

LM81
www.ti.com SNAS011E – JUNE 1999 – REVISED FEBRUARY 2002 LM81 Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor
Check for Samples: LM81 FEATURES APPLICATIONS 1 2 Temperature Sensing
6 Positive Voltage Inputs with Scaling
Resistors to Monitor +5V, +12V, +3.3V, +2.5V,
Vccp Power Supplies Directly
8-Bit DAC Output for Controlling Fan Speed
2 Fan Speed Monitoring Inputs
Chassis Intrusion Detector Input
WATCHDOG Comparison of all Monitored
Values
SMBus 1.0 (LM81C) and 1.1 (LM81B) Serial
Bus Interface Compatibility
LM81B has Improved Voltage Monitoring
Accuracy
VID0-VID4 Monitoring Inputs KEY SPECIFICATIONS Voltage Monitoring Error: +2% or В±1.2% (max)
Temperature Error
– -40˚C to +125˚C ± 3˚C (max)
Supply Voltage Range: 2.8V to 3.8V
Supply Current: 0.4 mA (typ)
ADC and DAC Resolution: 8 Bits
Temperature Resolution: 0.5ЛљC System Thermal and Hardware Monitoring for
Servers and PCs …