Temperature Sensors - Analog and Digital Output

Image Part Number Description / PDF Quantity Rfq
DS1856B-020

DS1856B-020

Analog Devices, Inc.

DUAL TEMP-CONTROLLED RESISTOR

1727

AD22100KR-REEL7

AD22100KR-REEL7

Analog Devices, Inc.

V-OUTPUT TEMPERATURE SENSOR

800

AD590KRZ

AD590KRZ

Analog Devices, Inc.

SENSOR ANALOG -55C-150C 8SOIC

413

MAX6677AUT3

MAX6677AUT3

Analog Devices, Inc.

PWM OUTPUT TEMPERATURE SENSORS

0

ADM1032ARM-REEL

ADM1032ARM-REEL

Analog Devices, Inc.

PLUS/MINUS 1 DEGREE CELSIUS REMO

69000

AD7414ARTZ-1REEL7

AD7414ARTZ-1REEL7

Analog Devices, Inc.

SENSOR DIGITAL -40C-125C SOT23-6

3778

ADT7316ARQZ-REEL7

ADT7316ARQZ-REEL7

Analog Devices, Inc.

SENSOR DIGITAL -40C-120C 16QSOP

733

AD7418AR

AD7418AR

Analog Devices, Inc.

ADC, SAR, 10-BIT, SERIAL ACCESS

17434

AD7415ARTZ-1500RL7

AD7415ARTZ-1500RL7

Analog Devices, Inc.

SENSOR DIGITAL -40C-125C SOT23-5

1

DS1620

DS1620

Analog Devices, Inc.

DIGITAL THERMOMETER & THERMOSTAT

15488

ADT7461AR-REEL

ADT7461AR-REEL

Analog Devices, Inc.

SERIAL SWITCH/DIGITAL SENSOR, 3C

2490

TMP35GSZ

TMP35GSZ

Analog Devices, Inc.

ANALOG TEMPERATURE SENSOR

3817

ADT7310TRZ

ADT7310TRZ

Analog Devices, Inc.

SENSOR DIGITAL -55C-150C 8SOIC

1295

MAX6612MXK-T

MAX6612MXK-T

Analog Devices, Inc.

ANALOG TEMPERATURE SENSOR

4560

ADT7317ARQ-REEL7

ADT7317ARQ-REEL7

Analog Devices, Inc.

DIGITAL TEMPERATURE SENSOR

8000

ADT14GS

ADT14GS

Analog Devices, Inc.

QUAD SETPOINT TEMP. MONITOR

6284

AD590JF

AD590JF

Analog Devices, Inc.

SENSOR ANALOG -55C-150C 2FLATPK

249

AD22100STZ

AD22100STZ

Analog Devices, Inc.

SENSOR ANALOG -50C-150C TO92-3

98

AD7417AR

AD7417AR

Analog Devices, Inc.

10-BIT SAR ADC, 4 CHANNEL

1678

DS1775R-U

DS1775R-U

Analog Devices, Inc.

DIGITAL THERMOMETER & THERMOSTAT

1325

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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