AD22105:  Low Voltage, Resistor Programmable Thermostatic Switch

The AD22105 is a solid state thermostatic switch. Requiring only one external programming resistor, the AD22105 can be set to switch accurately at any temperature in the wide operating range of -40°C ...More

AD22105:  Low Voltage, Resistor Programmable Thermostatic Switch

Product Description

The AD22105 is a solid state thermostatic switch. Requiring only one external programming resistor, the AD22105 can be set to switch accurately at any temperature in the wide operating range of -40°C to +150°C. Using a novel circuit architecture, the AD22105 asserts an open collector output when the ambient temperature exceeds the user-programmed setpoint temperature. The AD22105 has approximately 4°C of hysteresis which prevents rapid thermal on/off cycling.

The AD22105 is designed to operate on a single power supply voltage from +2.7 V to +7.0 V facilitating operation in battery powered applications as well as in industrial control systems. Because of low power dissipation (230 µW @ 3.3 V), self-heating errors are minimized and battery life is maximized.

An optional internal 200 k(ohm) pull-up resistor is included to facilitate driving light loads such as CMOS inputs.

Alternatively, a low power LED indicator may be driven directly.

Features

  • User-Programmable Temperature Setpoint
  • 2.0°C Setpoint Accuracy
  • 4.0°C Preset Hysteresis
  • Wide Supply Range
    (+2.7 Vdc to +7.0 Vdc)
  • Wide Temperature Range
    (- 40°C to +150°C)

Diagrams

AD22105 Diagram
Typical Application Diagram for AD22105

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ADT6401 - Low Cost, 2.7 V to 5.5 V, Pin-Selectable Temperature Switch in SOT-23 (Open Drain Output)

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Part# Sensor Output Max Deg C Error Over Tmp Temp Range(s) Supply Voltage Range Supply Current (max) Packages Features Product Description Price* (1000-4999)
ADT6504 Thermostatic Switch 6 -55 to +125 +2.7V to +5.5V - SOT23-5 - 2.7 V to 5.5 V, Micropower Temperature Switch in SOT-23 w/Push-pull Output, -45 to +15 Deg C $0.50
ADT6503 Thermostatic Switch 6 -55 to +125 +2.7V to +5.5V - SOT23-5 - 2.7V/5.5V, Micropower Temperature Switch in SOT-23 w/Open-drain Output, -45 to +15 Deg C $0.50
ADT6502 Thermostatic Switch 6 -55 to +125 +2.7V to +5.5V 50µA SOT23-5 - 2.7V/5.5 V, Micropower Temperature Switch in SOT-23 w/Active-High Push-pull Output, +35 to +115 DegC -
ADT6501 Thermostatic Switch 6 -55 to +125 +2.7V to +5.5V 50µA SOT23-5 - 2.7V/5.5V, Micropower Temperature Switch in SOT-23 w/ active-low open-drain Output, +35 to +115 DegC $0.49
AD22105 Thermostatic Switch 3 -40 to +125 +2.7V to 7V 120µA SOIC-8, TO-92 - Low Voltage, Resistor Programmable Thermostatic Switch $1.21
TMP01 +5mV/°K, Thermostatic Switch 3 -55 to +125 +4.5V to +13.2V 500µA PDIP-8, SOIC-8, TO-99 5 mV/°K, Controller, Two Set Points Low Power, Programmable Temperature Sensor/ Controller w/ upper/lower setpoints $2.67
Sorted by Max Error Over Tmp (Descending)

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

Pricing, Packaging & Availability

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For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples iinto your cart to check sample availability.

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