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Remote ±1°C Accurate Digital Temperature Sensors with SPI-Compatible Serial Interface

First Remote SPI-Compatible Temperature Sensors in SOT Packages ±1°C Accurate with 12-Bit +0.0625°C Resolution

Product Details

Key Features

Parametric specs for Temperature Sensors
Sensor Type Remote
# Channels One
Interface 3-Wire/SPI
Accuracy (±°C) 1
Parasite Pwr. No
Temp. Resolution (bits) 13
Oper. Temp. (°C) -55 to +125
Package/Pins SOT23/8
TDFN/8
Budgetary
Price (See Notes)
3.12
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Simplified Block Diagram

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Parameters

Parametric specs for Temperature Sensors
Sensor Type Remote
# Channels One
Interface 3-Wire/SPI
Accuracy (±°C) 1
Parasite Pwr. No
Temp. Resolution (bits) 13
Oper. Temp. (°C) -55 to +125
Package/Pins SOT23/8
TDFN/8
Budgetary
Price (See Notes)
3.12

Key Features

  • Accuracy
    • ±1°C (max) from 0°C ≤ TRJ ≤ +125°C, TA = +30°C
    • ±2.4°C (max) from -55°C ≤ TRJ ≤ +100°C,
    • 0°C ≤ TA ≤ +70°C
  • 12-Bit + Sign, 0.0625°C Resolution
  • Low Power Consumption
    • 30µA (typ) (MAX6628)
    • 200µA (typ) (MAX6627)
  • Operating Temperature Range (-55°C to +125°C)
  • Measurement Temperature Range, Remote Junction (-55°C to +145°C)
  • 0.5s (MAX6627) or 8s (MAX6628) Conversion Rate
  • SPI-Compatible Interface
  • +3.0V to +5.5V Supply Range
  • 8-Pin SOT23 and TDFN Packages
  • Lead-Free Version Available (TDFN Package)

Applications/Uses

  • Hard Disk Drive
  • Industrial Control Systems
  • Notebooks, PCs
  • Smart Battery Packs/Chargers

Description

The MAX6627/MAX6628 precise digital temperature sensors report the temperature of a remote sensor. The remote sensor is a diode-connected transistor, typically a low-cost, easily mounted 2N3904 NPN type that replaces conventional thermistors or thermocouples. The MAX6627/MAX6628 can also measure the die temperature of other ICs, such as microprocessors (µPs) or microcontrollers (µCs) that contain an on-chip, diode-connected transistor.

Remote accuracy is ±1°C when the temperature of the remote diode is between 0°C and +125°C and the temperature of the MAX6627/MAX6628 is +30°C. The temperature is converted to a 12-bit + sign word with 0.0625°C resolution. The architecture of the device is capable of interpreting data as high as +145°C from the remote sensor. The MAX6627/MAX6628 temperature should never exceed +125°C.

These sensors are 3-wire serial interface SPI-compatible, allowing the MAX6627/MAX6628 to be readily connected to a variety of µCs. The MAX6627/MAX6628 are read-only devices, simplifying their use in systems where only temperature data is required.

Two conversion rates are available, one that continuously converts data every 0.5s (MAX6627), and one that converts data every 8s (MAX6628). The slower version provides minimal power consumption under all operating conditions (30µA, typ). Either device can be read at any time and provide the data from the last conversion.

Both devices operate with supply voltages between +3.0V and +5.5V, are specified between -55°C and +125°C, and come in space-saving 8-pin SOT23 and lead-free TDFN packages.

Simplified Block Diagram

MAX6627, MAX6628: Functional Diagram MAX6627, MAX6628: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.