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数字温度传感器

LM94

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具有 β 补偿、风扇控制、硬件和电源监控器、采用 TSSOP 封装的 ±2°C 四路远程和本地温度传感器

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LM94

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产品详情

Local sensor accuracy (max) 3 Type Fan Controller Operating temperature range (°C) 0 to 100 Supply voltage (min) (V) 3 Interface type SMBus Supply voltage (max) (V) 3.6 Features PWM output, Tachometer Supply current (max) (µA) 1600 Temp resolution (max) (Bits) 8 Remote channels (#) 4 Addresses 3 Rating Catalog
Local sensor accuracy (max) 3 Type Fan Controller Operating temperature range (°C) 0 to 100 Supply voltage (min) (V) 3 Interface type SMBus Supply voltage (max) (V) 3.6 Features PWM output, Tachometer Supply current (max) (µA) 1600 Temp resolution (max) (Bits) 8 Remote channels (#) 4 Addresses 3 Rating Catalog
TSSOP (DGG) 56 113.4 mm² 14 x 8.1
  • 8-bit ΣΔ ADC
  • Monitors 16 Power Supplies
  • Monitors 4 Remote Thermal Diodes and 2 LM60
  • New TruTherm Technology Support for Precision Thermal Diode Measurements
  • Internal Ambient Temperature Sensing
  • Programmable Autonomous Fan Control Based on Temperature Readings with Fan Boost Support
  • Fan Boost Support on Tachometer Limit Error Event
  • Fan Control Based on 13-step Lookup Table or PI Control Loop or Combination of Both
  • PI Fan Control Loop Supports Tcontrol
  • Temperature Reading Digital Filters
  • 0.5°C digital Temperature Sensor Resolution
  • 0.0625°C Filtered Temperature Resolution for Fan Control
  • 2 PWM Fan Speed Control Outputs
  • 4 Fan Tachometer Inputs
  • Dual Processor Thermal Throttling (PROCHOT) Monitoring
  • Dual Dynamic VID Monitoring (6/7 VIDs per processor) Supports VRD10.2/11
  • 8 General Purpose I/Os:
    • 4 Can be Configured as Fan tachometer Inputs
    • 2 Can be Configured to Connect to Processor THERMTRIP
    • 2 are Standard GPIOs that Could be Used to Monitor IERR Signal
  • 2 General Purpose Inputs that Can be Used to Monitor the 7th VID Signal for VRD11
  • Limit Register Comparisons of all Monitored Values
  • 2-wire Serial Digital Interface, SMBus 2.0 Compliant
    • Supports Byte/block Read and Write
    • Selectable Slave Address (Tri-level Pin Selects 1 of 3 Possible Addresses)
    • ALERT Output Supports Interrupt or Comparator Modes
  • 2.5V Reference Voltage Output
  • 56-pin TSSOP Package
  • XOR-tree Test Mode

Key Specifications

  • Voltage Measurement Accuracy ... ±2% FS (max)
  • Temperature Resolution ... 9-bits, 0.5°C
  • Temperature Sensor Accuracy ... ±2.5 °C (max)
  • Temperature Range:
    • LM94 Operational ... 0°C to +85°C
    • Remote Temp Accuracy ... 0°C to +125°C
  • Power Supply Voltage ... +3.0V to +3.6V
  • Power Supply Current ... 1.6 mA

All trademarks are the property of their respective owners.

  • 8-bit ΣΔ ADC
  • Monitors 16 Power Supplies
  • Monitors 4 Remote Thermal Diodes and 2 LM60
  • New TruTherm Technology Support for Precision Thermal Diode Measurements
  • Internal Ambient Temperature Sensing
  • Programmable Autonomous Fan Control Based on Temperature Readings with Fan Boost Support
  • Fan Boost Support on Tachometer Limit Error Event
  • Fan Control Based on 13-step Lookup Table or PI Control Loop or Combination of Both
  • PI Fan Control Loop Supports Tcontrol
  • Temperature Reading Digital Filters
  • 0.5°C digital Temperature Sensor Resolution
  • 0.0625°C Filtered Temperature Resolution for Fan Control
  • 2 PWM Fan Speed Control Outputs
  • 4 Fan Tachometer Inputs
  • Dual Processor Thermal Throttling (PROCHOT) Monitoring
  • Dual Dynamic VID Monitoring (6/7 VIDs per processor) Supports VRD10.2/11
  • 8 General Purpose I/Os:
    • 4 Can be Configured as Fan tachometer Inputs
    • 2 Can be Configured to Connect to Processor THERMTRIP
    • 2 are Standard GPIOs that Could be Used to Monitor IERR Signal
  • 2 General Purpose Inputs that Can be Used to Monitor the 7th VID Signal for VRD11
  • Limit Register Comparisons of all Monitored Values
  • 2-wire Serial Digital Interface, SMBus 2.0 Compliant
    • Supports Byte/block Read and Write
    • Selectable Slave Address (Tri-level Pin Selects 1 of 3 Possible Addresses)
    • ALERT Output Supports Interrupt or Comparator Modes
  • 2.5V Reference Voltage Output
  • 56-pin TSSOP Package
  • XOR-tree Test Mode

Key Specifications

  • Voltage Measurement Accuracy ... ±2% FS (max)
  • Temperature Resolution ... 9-bits, 0.5°C
  • Temperature Sensor Accuracy ... ±2.5 °C (max)
  • Temperature Range:
    • LM94 Operational ... 0°C to +85°C
    • Remote Temp Accuracy ... 0°C to +125°C
  • Power Supply Voltage ... +3.0V to +3.6V
  • Power Supply Current ... 1.6 mA

All trademarks are the property of their respective owners.

The LM94 hardware monitor has a two wire digital interface compatible with SMBus 2.0. Using a ΣΔ ADC, the LM94 measures the temperature of four remote diode connected transistors as well as its own die and 16 power supply voltages. The LM94 has new TruTherm technology that supports precision thermal diode measurements of processors on sub-micron processes.

Description (continued)
To set fan speed, the LM94 has two PWM outputs that are each controlled by up to six temperature zones. The fan-control algorithm can be based on a lookup table, PI (proportional/integral) control loop, or a combination of both. The LM94 includes digital filters that can be invoked to smooth temperature readings for better control of fan speed such that acoustical noise is minimized. The LM94 has four tachometer inputs to measure fan speed. Limit and status registers for all measured values are included.

The LM94 builds upon the functionality of previous motherboard server management ASICs, such as the LM93. It also adds measurement and control support for dynamic Vccp monitoring for VRD10/11 and PROCHOT. It is designed to monitor a dual processor Xeon class motherboard with a minimum of external components.

The LM94 hardware monitor has a two wire digital interface compatible with SMBus 2.0. Using a ΣΔ ADC, the LM94 measures the temperature of four remote diode connected transistors as well as its own die and 16 power supply voltages. The LM94 has new TruTherm technology that supports precision thermal diode measurements of processors on sub-micron processes.

Description (continued)
To set fan speed, the LM94 has two PWM outputs that are each controlled by up to six temperature zones. The fan-control algorithm can be based on a lookup table, PI (proportional/integral) control loop, or a combination of both. The LM94 includes digital filters that can be invoked to smooth temperature readings for better control of fan speed such that acoustical noise is minimized. The LM94 has four tachometer inputs to measure fan speed. Limit and status registers for all measured values are included.

The LM94 builds upon the functionality of previous motherboard server management ASICs, such as the LM93. It also adds measurement and control support for dynamic Vccp monitoring for VRD10/11 and PROCHOT. It is designed to monitor a dual processor Xeon class motherboard with a minimum of external components.

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类型 标题 下载最新的英语版本 日期
* 数据表 LM94 TruTherm Hardware Monitor with PI Loop Fan Control for Server Management 数据表 (Rev. C) 2013年 3月 22日

设计和开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

驱动程序或库

LM93SW-LINUX — 用于 LM93 的 Linux 驱动程序

Linux 驱动程序支持 LM93 系列硬件监测计。Linux 驱动程序支持通过 I2C 总线进行通信，并可与硬件监控子系统交互。
Linux 主线状态

在 Linux 主线中提供：是
可通过 git.ti.com 获取：不适用

支持的器件：
  • lm93
  • lm94
Linux 源文件

与该器件关联的文件为：

  1. drivers/hwmon/lm93.c
  2. Documentation/hwmon/lm93
源文件

drivers/hwmon/lm93.c

其他文件

Documentation/hwmon/lm93

 

启用驱动程序支持

使用“make menuconfig”（也可以使用“make (...)
查看选项
封装 引脚 下载
TSSOP (DGG) 56 查看选项
应遵守 TI 评估类商品的标准条款与条件。

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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