±0.5°C Accurate, 16-Bit Digital

ADT7410

Rev. 0

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FEATURES

13- or 16-bit user selectable temperature-to-digital converter

Temperature accuracy: ±0.5°C from −40°C to +105°C

No temperature calibration/correction required by user

Power saving 1 sample per second (SPS) mode

Fast first conversion on power-up of 6 ms

Operating temperature: −55°C to +150°C

Operating voltage: 2.7 V to 5.5 V

Critical overtemperature indicator

Programmable overtemperature/undertemperature interrupt

Low power consumption: 700 μW typical at 3.3 V

Shutdown mode for lower power: 7 μW typical at 3.3 V

8-lead narrow SOIC RoHS-compliant package

APPLICATIONS

Medical equipment

Environmental control systems

Computer thermal monitoring

Thermal protection

Industrial process control

Power system monitors

Hand-held applications

GENERAL DESCRIPTION

The ADT7410 is a high accuracy digital temperature sensor

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

reference and a 13 bit ADC to monitor and digitize the temper-

ature to a 0.0625°C resolution. The ADC resolution, by default,

is set to 13 bits (0.0625°C). This can be changed to 16 bits

(0.0078°C) by setting Bit 7 in the configuration register

(Register Address 0x03).

The ADT7410 is guaranteed to operate over supply voltages from

2.7 V to 5.5 V. Operating at 3.3 V, the average supply current is typi-

cally 210 μA. The ADT7410 has a shutdown mode that powers

down the device and offers a shutdown current of typically 2 μA.

The ADT7410 is rated for operation over the −55°C to +150°C

temperature range.

Pin A0 and Pin A1 are available for address selection, giving the

drain output that becomes active when the temperature exceeds

a programmable critical temperature limit. The default critical

temperature limit is 147°C. The INT pin is also an open-drain

output that becomes active when the temperature exceeds a

programmable limit. The INT and CT pins can operate in either

comparator or interrupt mode.

FUNCTIONAL BLOCK DIAGRAM

TEMPERATURE

VALUE

REGISTER

CONFIGURATION

REGISTER

REGISTER

REGISTER

REGISTER

REGISTER

POINTER

REGISTER

INTERNAL

REFERENCE

8

7

TEMPERATURE

SENSOR

INTERNAL

OSCILLATOR

FILTER

LOGIC

Σ-Δ

MODULATOR

GND

6

5

CT

INT

3

4

A0

A1

1

2

SCL

SDA

ADT7410

Figure 1.