Temperature Sensors - Analog and Digital Output

Image Part Number Description / PDF Quantity Rfq
MAX6688AU75H

MAX6688AU75H

Analog Devices, Inc.

TEMPERATURE SWITCHES

2333

5962-8757103XA

5962-8757103XA

Analog Devices, Inc.

SENSOR ANALOG -55C-150C 2FLATPAK

3

MAX6697UP9C+

MAX6697UP9C+

Analog Devices, Inc.

MAX6697 7-CHANNEL PRECISION TEMP

2263

MAX7500MSA

MAX7500MSA

Analog Devices, Inc.

MAX7500 DIGITAL TEMP SENSOR

1418

AD7817AR-REEL

AD7817AR-REEL

Analog Devices, Inc.

SERIAL SWITCH/DIGITAL SENSOR

35000

AD22103KT

AD22103KT

Analog Devices, Inc.

3.3V TEMPERATURE SENSOR

131428

ADM1032ARM

ADM1032ARM

Analog Devices, Inc.

SYSTEM TEMPERATURE MONITOR

8296

MAX6642ATT98-T

MAX6642ATT98-T

Analog Devices, Inc.

SMBUS TEMPERATURE SENSOR

7450

TMP35G

TMP35G

Analog Devices, Inc.

LOW VOLTAGE TEMPERATURE SENSOR

0

ADT7320UCPZ-R2

ADT7320UCPZ-R2

Analog Devices, Inc.

SENSOR DGTL -40C-150C 16LFCSP

2397

AD590KH/883B

AD590KH/883B

Analog Devices, Inc.

IC TEMP TRANSDUCR 2-TERM TO52-3

121

AD7416AR-REEL7

AD7416AR-REEL7

Analog Devices, Inc.

SERIAL SWITCH/DIGITAL SENSOR

950

MXB7846EUE

MXB7846EUE

Analog Devices, Inc.

4-WIRE TOUCH-SCREEN CONTROLLER

0

ADT75BRMZ-REEL7

ADT75BRMZ-REEL7

Analog Devices, Inc.

+/- 1 DEGREE CENTIGRADE ACCURATE

32860

TMP36FS

TMP36FS

Analog Devices, Inc.

ANALOG TEMPERATURE SENSOR

0

MAX6667AUT#T

MAX6667AUT#T

Analog Devices, Inc.

HIGH-ACCURACY PWM OUTPUT TEMPERA

0

ADM1020AR-REEL

ADM1020AR-REEL

Analog Devices, Inc.

SYSTEM TEMPERATURE MONITOR

12500

TMP35FSZ-REEL

TMP35FSZ-REEL

Analog Devices, Inc.

LOW VOLTAGE TEMPERATURE SENSOR

18689

DS1775R5+TR

DS1775R5+TR

Analog Devices, Inc.

DIGITAL THERMOMETER & THERMOSTAT

6000

ADM1020AR-REEL7

ADM1020AR-REEL7

Analog Devices, Inc.

SYSTEM TEMPERATURE MONITOR

219352

Temperature Sensors - Analog and Digital Output

1. Overview

Temperature sensors are devices that detect thermal energy and convert it into electrical signals. They are categorized into analog and digital output types based on signal transmission methods. Analog sensors produce continuous voltage/current signals, while digital sensors output discrete numerical values via communication protocols. These sensors are critical in industrial automation, healthcare, consumer electronics, and environmental monitoring, enabling precise thermal management and system reliability.

2. Major Types and Functional Classification

TypeFunction FeaturesApplication Examples
Analog Sensors (e.g., Thermistors, RTDs)Continuous signal output, high resolution, requires ADC conversionIndustrial process control, HVAC systems
ThermocouplesWide temperature range (-200 C to 2000 C), self-poweredHigh-temperature furnaces, automotive exhaust monitoring
Digital Sensors (e.g., IC-based)Integrated ADC, protocol interfaces (I2C/SPI), high accuracySmart thermostats, wearable devices
Infrared SensorsContactless measurement, detects thermal radiationMedical thermometers, autonomous vehicle systems

3. Structure and Components

Typical temperature sensors consist of: - Sensing Element: Thermoresistive materials (e.g., platinum in RTDs) or semiconductor junctions - Signal Conditioning Circuitry: Amplifiers, ADC converters (for digital types), and linearization modules - Package: Hermetic sealing for environmental protection, TO-92 or SMD enclosures - Interface: Wires/pins for analog sensors, digital communication buses (I2C, SPI)

4. Key Technical Specifications

ParameterDescriptionImportance
Temperature RangeOperational limits (-50 C to +300 C typical)Determines application suitability
Accuracy 0.1 C to 5 C depending on typeImpacts measurement reliability
Response Time1ms to 10s for signal stabilizationCritical for dynamic systems
Resolution0.01 C (high-end digital) to 1 CDefines measurement granularity
Output InterfaceVoltage, current, I2C, UARTDictates system integration method

5. Application Fields

  • Industrial: Reactor temperature monitoring, CNC machine thermal compensation
  • Healthcare: Patient monitoring systems, vaccine storage units
  • Consumer: Smart home HVAC, smartphone thermal management
  • Automotive: Battery management systems (BMS), engine temperature control

6. Leading Manufacturers and Products

ManufacturerRepresentative ProductKey Features
Texas InstrumentsLM75BDigital output, 2 C accuracy, I2C interface
STMicroelectronicsLPS22HBMEMS-based digital sensor, 0.008 C resolution
TE ConnectivityNTC Thermistor NTCGHigh sensitivity, automotive-grade reliability
Analog DevicesAD8495Thermocouple signal conditioner, 1mV/ C output

7. Selection Guidelines

Key considerations: - Required temperature range and environmental conditions - Output type compatibility with host system - Accuracy vs. cost trade-offs - Installation constraints (contact vs. non-contact) - Calibration requirements and long-term stability

8. Industry Trends

Future developments focus on: - Wireless sensor networks with integrated BLE/Zigbee - AI-enhanced predictive thermal management - MEMS-based ultra-miniaturized sensors for IoT devices - Energy-harvesting self-powered sensor nodes - Multi-sensor fusion systems combining temperature with humidity/pressure

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