ANALOG DEVICES ADT7310 Data Sheet

±0.5°C Accurate, 16-Bit Digital SPI Temperature Sensor

Preliminary Technical Data ADT7310 FEATURES FUNCTIONAL BLOCK DIAGRAM 16-bit temperature-to-digital converter

INTERNAL

Temperature accuracy ±0.5°C from 0°C to 70°C INTERNAL

OSCILLATOR

REFERENCE

SPI-compatible interface CT

TCRIT

Operating temperature from−55°C to +175°C

Operating voltage from 2.7 V to 5.5 V

TEMPERATURE

Critical overtemperature indicator MODULATOR

SENSOR

Programmable overtemperature/undertemperature

THIGH

interrupt DIN Shutdown mode for low power consumption

FILTER

Power consumption: 1 m W typically at 3.3 V LOGIC

ADT7312

8-lead narrow SOIC Ro HS-compliant package TLOW

APPLICATIONS Medical equipment CONFIGURATION & TCRIT TLOW

STATUS REGISTERS REGISTER REGISTER

Isolated sensors

Environmental control systems Computer thermal monitoring

Thermal protection TEMPERATURE

THYST THIGH

VALUE

REGISTER REGISTER IN

Industrial process control REGISTER Power system monitors Hand-held applications

Figure 1.

www.BDTIC.com/ADI GENERAL DECSRIPTION

The ADT7310 is a high accuracy digital temperature sensor PRODUCT HIGHLIGHTS

in a standard narrow SOIC package. It contains a band gap

An on-chip temperature sensor allows an accurate

temperature sensor and a 13-bit ADC to monitor and digitize the

measurement of the ambient temperature. The measurable

temperature to a resolution of 0.0625°C. The resolution can be

temperature range is −55°C to +150°C.

changed to 16 bits by setting a bit in the configuration register,

Supply voltage is 2.7 V to 5.5 V.

giving a 0.0078°C resolution. The default resolution is 13 bits.

Available in an 8-lead narrow SOIC packag The ADT7410 is guaranteed to operate at supply voltages from Temperature accuracy is ±0.5°C max from 0°C to 70°C. 2.7 V to 5.5 V. Operating at 3.3 V, the average supply current is Default temperature resolution is 0.0625°C. typically 250 μA. The ADT7410 offers a shutdown mode that First conversion on power-up is a fast conversion to powers down the device and gives a shutdown current of typically ensure fast CT and INT pin activation in overtemperature 0.8 μA. The ADT7410 is rated for operation over the −55°C to situations. +150°C temperature range. Programmable temperature interrupt limits. Shutdown mode reduces the current consumption to

The CT pin is an open-drain output that becomes active when

0.8 μA typical.

the temperature exceeds a programmable critical temperature limit. The default critical temperature limit is 80°C. The INT pin is also an open-drain output that becomes active when the temperature exceeds a programmable limit. The INT pin can operate in either comparator or interrupt mode.

Rev. Pr A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

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