LM87_TI 具有 2 条远程和 1 条本地通道的温度传感器、风扇控制、硬件和 8 个电源电压监控器

LM87的基本参数

制造厂商：TI
产品类别：传感器
技术类目：温度传感器和控制 IC - 数字温度传感器
功能描述：具有 2 条远程和 1 条本地通道的温度传感器、风扇控制、硬件和 8 个电源电压监控器
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LM87的产品详情：

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. A channel on the ADC measures the supply voltage applied to the LM87, nominally 3.3 V. Two of the ADC inputs can be redirected to a counter that can measure the speed of up to 2 fans. A slow speed ΣΔ ADC architecture allows stable measurement of signals in an extremely noisy environment. The DAC, with a 0 to 2.5 V output voltage range, can be used for fan speed control. Additional inputs are provided for Chassis Intrusion detection circuits, and VID monitor inputs. The VID monitor inputs can also be used as IRQ inputs if VID monitoring is not required. The LM87 has a Serial Bus interface that is compatible with SMBus and I²C.

LM87的优势和特性：

Remote diode temperature sensing (2 channels)
8 positive voltage inputs with scaling resistors for monitoring +5 V, +12 V, +3.3 V, +2.5 V, Vccp power supplies directly
2 inputs selectable for fan speed or voltage monitoring
8-bit DAC output for controlling fan speed
Chassis Intrusion Detector input
WATCHDOG comparison of all monitored values
SMBus or I2C Serial Bus interface compatibility
VID0-VID4 or IRQ0-IRQ4 monitoring inputs
On chip temperature sensor

Key Specifications

Voltage Monitoring Error ±2 % (max)
External Temperature Error ±4 °C (max)
Internal Temperature Error
- ?40 °C to +125 °C ± 3 °C (typ)
Supply Voltage Range 2.8 to 3.8 V
Supply Current 0.7 mA (typ)
ADC and DAC Resolution 8 Bits
Temperature Resolution 1.0 °C

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LM87的参数（英文）：

Local sensor accuracy (Max) (+/- C)
1
Type
Fan Controller
Operating temperature range (C)
-40 to 125
Supply voltage (Min) (V)
2.8
Interface type
I2C, SMBus
Supply voltage (Max) (V)
3.8
Supply current (Max) (uA)
1200
Temp resolution (Max) (bits)
8
Features
Tachometer, ALERT
Remote channels (#)
2
Addresses
1
Rating
Catalog

LM87具体的完整产品型号参数及价格（美元）：

LM87的完整型号有：LM87CIMT/NOPB、LM87CIMTX/NOPB、LM87CIMT，以下是这些产品的关键参数及官网采购报价：

LM87CIMT/NOPB，工作温度：-40 to 125，封装：TSSOP (PW)-24，包装数量MPQ：61个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM87CIMT/NOPB的批量USD价格：3.611（1000+）

LM87CIMTX/NOPB，工作温度：-40 to 125，封装：TSSOP (PW)-24，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM87CIMTX/NOPB的批量USD价格：3.033（1000+）

LM87CIMT，工作温度：-40 to 125，封装：TSSOP (PW)-24，包装数量MPQ：61个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNPB，TI官网LM87CIMT的批量USD价格：4.045（1000+）