The LM87 is a highly integrated data acquisition system for hardware monitoring of servers, Personal Computers, or virtually any microprocessor-based system. In a PC, the LM87 can be used to monitor power supply voltages, motherboard and processor temperatures, and fan speeds. Actual values for these inputs can be read at any time. Programmable WATCHDOG limits in the LM87 activate a fully programmable and maskable interrupt system with two outputs (INT# and THERM#).
The LM87 has an on-chip digital output temperature sensor with 8-bit resolution as well as the capability of monitoring 2 external diode temperatures to 8-bit resolution, an 8 channel analog input ADC with 8-bit resolution and an 8-bit DAC
| LM87 | |
| Resolution (Bits) | 8 |
| Analog Inputs | 7 to 3, V+ |
| ADC Resolution (Bits) | 8 |
| Interface Type | 2-Wire Serial |
| Supply Max (Volt) | 3.8 |
| Supply Min (Volt) | 2.8 |
| Category | Thermal Management |
| Fan Control Output(s) | 1 DAC |
| Fan Speed Inputs | 4 |
| GPIOs | CI, RESET |
| Interrupt Outputs (Count) | 1 |
| Quiescent Current (mA) | 2 |
| Temp Resolution | 8-bit/1degC |
| TruTherm(TM) Beta Compensation | No |
| VID Inputs | 5 |