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  • 具有脉冲计数接口的 LMT01 0.5°C 精度双引脚数字输出温度传感器

    • ZHCSE14D June   2015  – June 2018 LMT01

      PRODUCTION DATA.  

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  • 具有脉冲计数接口的 LMT01 0.5°C 精度双引脚数字输出温度传感器
  1. 1 特性
  2. 2 应用
    1.     LMT01 精度
  3. 3 说明
    1.     双引脚集成电路 (IC) 温度传感器
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics
    6. 6.6  Electrical Characteristics - TO-92/LPG Pulse Count to Temperature LUT
    7. 6.7  Electrical Characteristics - WSON/DQX Pulse Count to Temperature LUT
    8. 6.8  Switching Characteristics
    9. 6.9  Timing Diagram
    10. 6.10 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Output Interface
      2. 7.3.2 Output Transfer Function
      3. 7.3.3 Current Output Conversion to Voltage
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Mounting, Temperature Conductivity, and Self-Heating
    2. 8.2 Typical Application
      1. 8.2.1 3.3-V System VDD MSP430 Interface - Using Comparator Input
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Setting the MSP430 Threshold and Hysteresis
        3. 8.2.1.3 Application Curves
    3. 8.3 System Examples
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 接收文档更新通知
    2. 11.2 社区资源
    3. 11.3 商标
    4. 11.4 静电放电警告
    5. 11.5 术语表
  12. 12机械、封装和可订购信息
  13. 重要声明
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DATA SHEET

具有脉冲计数接口的 LMT01 0.5°C 精度双引脚数字输出温度传感器

本资源的原文使用英文撰写。 为方便起见，TI 提供了译文；由于翻译过程中可能使用了自动化工具，TI 不保证译文的准确性。 为确认准确性，请务必访问 ti.com 参考最新的英文版本（控制文档）。

1 特性

  • 在 –50°C 至 150°C 宽温度范围内保持高精度
    • –20°C 至 90°C：±0.5°C（最大值）
    • 90°C 至 150°C：±0.625°C（最大值）
    • –50°C 至 –20°C：±0.7°C（最大值）
  • 通过双引脚封装简化精密数字温度测量
  • 脉冲计数电流环路可由处理器轻松读取。输出脉冲数采用与温度成正比的，分辨率为 0.0625°C
  • 通信频率：88kHz
  • 转换电流：34μA
  • 每次转换的连续加数据传输时间：100ms
  • 由具有集成 EMI 抗扰度的 2V 至 5.5V (VP-VN) 悬空电源供电运行
  • 多种双引脚封装产品：TO-92/LPG (3.1mm × 4mm × 1.5mm) – 尺寸为传统 TO-92 和具有可湿性侧面的 WSON 的一半

2 应用

  • 数字输出接线探针
  • 白色家电
  • 暖通空调 (HVAC)
  • 电源
  • 电池管理

LMT01 精度

LMT01 C014_3V_SNIS189.png
在曲线中心绘制的典型单元

3 说明

LMT01器件是一款高精度双引脚温度传感器，具备一个易于使用的脉冲计数电流环路接口，因此适用于汽车、工业和消费品市场中的 板载和非板载 应用。LMT01 具有数字脉冲计数输出，可在宽温度范围内实现高精度，因此适合与所有 MCU 配对使用，不仅能够降低软件开销，而且不会影响集成 ADC 的质量或可用性。TI 的 LMT01 器件在 –20°C 至 90°C 的温度范围内支持 ±0.5°C 的最大精度，同时具有极高的分辨率 (0.0625°C)，无需借助系统校准或软硬件补偿。

LMT01 的脉冲计数接口设计用于直接连接 GPIO 或比较器输入，从而简化硬件实施。同样，LMT01 具备集成的 EMI 抑制功能和简单的双引脚架构，因而适用于噪声环境中的板载和非板载温度传感。LMT01 器件可轻松转换成双线温度探针，电线长度可达两米。请参阅符合汽车要求的 LMT01-Q1 版本。

器件信息(1)

器件型号 封装 封装尺寸（标称值）
LMT01LPG TO-92 (2) 4.00mm × 3.15mm
LMT01DQX WSON (2) 1.70mm × 2.50mm
  1. 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。

双引脚集成电路 (IC) 温度传感器

LMT01 Schem_06_SNIS189.gif

4 修订历史记录

Changes from C Revision (June 2017) to D Revision

  • Added device stamp to the TO-92 pinout top viewGo
  • Changed the TO-92S pin numbers in the Pin FunctionsGo

Changes from B Revision (April 2017) to C Revision

  • Removed Electrical Characteristics: WSON/DQX table; Combined the LPG and DQX Electrical Characteristics tables togetherGo
  • Changed IOL maximum value from: 39 µA to: 40 µAGo
  • Changed leakage value from: 1 µA to 3.5 µAGo
  • Moved the thermal response time parameters to the Electrical Characteristics tableGo
  • Added Missing Cross ReferencesGo

Changes from A Revision (June 2015) to B Revision

  • Added 全新 WSON/DQX 封装（整个数据表中）Go
  • Changed updated package information. Go
  • Added Electrical Characteristics - WSON/DQX Pulse Count to Temperature LUTGo
  • Added -40 for Sample Calculations Table Go
  • Added missing cross reference Go

Changes from * Revision (June 2015) to A Revision

  • Added 完整数据表。Go
  • Added 澄清说明。Go

5 Pin Configuration and Functions

DQX Package
2-Pin WSON
Bottom View
LMT01 PinOut_DFN_SNIS189.gif
LPG Package
2-Pin TO-92
Top View
LMT01 pin-name-01-pkg-SNIS189.gif

Pin Functions

PIN TYPE DESCRIPTION
NAME TO-92S WSON
VP 2 1 Input Positive voltage pin; may be connected to system power supply or bias resistor.
VN 1 2 Output Negative voltage pin; may be connected to system ground or a bias resistor.

6 Specifications

6.1 Absolute Maximum Ratings

See (1)(2).
MIN MAX UNIT
Voltage drop (VP – VN) −0.3 6 V
Storage temperature, Tstg −65 175 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) Soldering process must comply with Reflow Temperature Profile specifications. Refer to www.ti.com/packaging.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±750
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

MIN MAX UNIT
Free-air temperature −50 150 °C
Voltage drop (VP – VN) 2 5.5 V

6.4 Thermal Information

THERMAL METRIC(1) LMT01 UNIT
DQX (WSON) LPG (TO-92)
2 PINS 2 PINS
RθJA Junction-to-ambient thermal resistance 213 177 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 71 94 °C/W
RθJB Junction-to-board thermal resistance 81 152 °C/W
ψJT Junction-to-top characterization parameter 2.4 33 °C/W
ψJB Junction-to-board characterization parameter 79 152 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

6.5 Electrical Characteristics

Over operating free-air temperature range and operating VP-VN range (unless otherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ACCURACY
Temperature accuracy (1)(2) VP – VN of 2.15 V to 5.5 V 150°C –0.625 0.625 °C
125°C -0.625 0.625 °C
120°C –0.625 0.625 °C
110°C –0.5625 0.5625 °C
100°C –0.5625 0.5625 °C
90°C –0.5 0.5 °C
25°C –0.5 ±0.125 0.5 °C
–20°C –0.5 0.5 °C
–30°C –0.5625 0.5625 °C
–40°C –0.625 0.625 °C
Temperature accuracy (1)(2) VP – VN of 2.15 V to 5.5 V –50°C –0.6875 ±0.4 0.6875 °C
PULSE COUNT TRANSFER FUNCTION
Number of pulses at 0°C 800 808 816
Output pulse range 15 3228
Theoretical max (exceeds device rating) 1 4095
Resolution of one pulse 0.0625 °C
OUTPUT CURRENT
IOL Output current variation Low level 28 34 40 µA
IOH High level 112.5 125 143 µA
High-to-Low level output current ratio 3.1 3.7 4.5
POWER SUPPLY
Accuracy sensitivity to change in VP – VN 2.15 V ≤ VP – VN ≤ 5. 0 V(3) 40 133 m°C/V
Leakage Current VP – VN VDD ≤ 0.4 V 0.002 3.5 µA
THERMAL RESPONSE
Stirred oil thermal response time to 63% of final value (package only) DQX (WSON) 0.4 s
LPG (TO-92) 0.8
Still air thermal response time to 63% of final value (package only) DQX (WSON) 9.4 s
LPG (TO-92) 28
(1) Calculated using Pulse Count to Temperature LUT and 0.0625°C resolution per pulse, see sectionElectrical Characteristics - TO-92/LPG Pulse Count to Temperature LUT and Electrical Characteristics - WSON/DQX Pulse Count to Temperature LUT.
(2) Error can be linearly interpolated between temperatures given in table as shown in the Accuracy vs Temperature curves in sectionTypical Characteristics.
(3) Limit is using end point calculation.

6.6 Electrical Characteristics - TO-92/LPG Pulse Count to Temperature LUT

Over operating free-air temperature range and VP-VN operating range (unless otherwise noted). LUT is short for Look-up Table.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Digital output code –50°C 15 26 37 pulses
–40°C 172 181 190
–30°C 329 338 347
–20°C 486 494 502
–10°C 643 651 659
0°C 800 808 816
10°C 958 966 974
20°C 1117 1125 1133
30°C 1276 1284 1292
40°C 1435 1443 1451
50°C 1594 1602 1610
60°C 1754 1762 1770
70°C 1915 1923 1931
80°C 2076 2084 2092
90°C 2237 2245 2253
100°C 2398 2407 2416
110°C 2560 2569 2578
120°C 2721 2731 2741
130°C 2883 2893 2903
140°C 3047 3057 3067
150°C 3208 3218 3228

6.7 Electrical Characteristics - WSON/DQX Pulse Count to Temperature LUT

Over operating free-air temperature range and 2.15 V ≤ VP – VN ≤ 5. 0 V power supply operating range (unless otherwise noted). LUT is short for Look-up Table.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Digital output code –50°C 15 26 37 pulses
–40°C 172 181 190
–30°C 328 337 346
–20°C 486 494 502
–10°C 643 651 659
0°C 800 808 816
10°C 958 966 974
20°C 1117 1125 1133
30°C 1276 1284 1292
40°C 1435 1443 1451
50°C 1594 1603 1611
60°C 1754 1762 1771
70°C 1915 1923 1931
80°C 2076 2084 2092
90°C 2237 2245 2254
100°C 2398 2407 2416
110°C 2560 2569 2578
120°C 2721 2731 2741
125°C 2802 2814 2826
130°C 2883 2894 2904
140°C 3047 3058 3068
150°C 3210 3221 3231

6.8 Switching Characteristics

Over operating free-air temperature range and operating VP – VN range (unless otherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
tR, tF Output current rise and fall time CL = 10 pF, RL = 8 k 1.45 µs
fP Output current pulse frequency 82 88 94 kHz
Output current duty cycle 40% 50% 60%
tCONV Temperature conversion time(1) 2.15 V to 5.5 V 46 50 54 ms
tDATA Data transmission time 44 47 50 ms
(1) Conversion time includes power up time or device turn on time that is typically 3 ms after POR threshold of 1.2 V is exceeded.

6.9 Timing Diagram

LMT01 Timing_01_SNIS189.gif
Figure 1. Timing Specification Waveform

 
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