ADT7312 datasheet(4/25 Pages) AD

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Data Sheet

ADT7312

Rev. A | Page 3 of 24

SPECIFICATIONS

TA = −55°C to +175°C, VDD = 2.7 V to 5.5 V, unless otherwise noted.

Table 1.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

TEMPERATURE SENSOR AND ADC

Accuracy1

±1.0

°C

TA = −55°C to +175°C, VDD = 2.7 V to 3.3 V

±1.1

°C

TA = −55°C to +175°C, VDD = 3.3 V to 3.6 V

±1.2

°C

TA = +150°C to +175°C, VDD = 4.5 V to 5.5 V

±1.5

°C

TA = −55°C to +175°C, VDD = 4.5 V to 5.5 V

ADC Resolution

Bits

Twos complement temperature value of sign bit

plus 12 bits (power-on default resolution)

Bits

Twos complement temperature value of sign bit

plus 15 bits (Bit 7 = 1 in the configuration register)

Temperature Resolution

13-Bit

0.0625

°C

13-bit resolution (sign bit plus 12 bits)

16-Bit

0.0078

°C

16-bit resolution (sign bit plus 15 bits)

Temperature Conversion Time

240

Continuous and one-shot conversion modes

Fast Temperature Conversion Time

First conversion on power-up only

1 SPS Conversion Time

1 SPS mode

Temperature Hysteresis

±0.002

°C

Repeatability2

±0.015

°C

TA = 25°C

DC PSRR

0.1

°C/V

TA = 25°C

DIGITAL OUTPUTS (CT, INT)

Open-drain outputs

High Output Leakage Current, IOH

+0.1

±1

μA

CT and INT pins pulled up to 5.5 V

Output Low Voltage, VOL

0.4

IOL = 3 mA at 5.5 V, IOL = 1 mA at 3.3 V

Output High Voltage, VOH

0.7 × VDD

Output Capacitance, COUT

DIGITAL INPUTS (DIN, SCLK, CS)

Input Current, IIN

±1

μA

VIN = 0 V to VDD

Input Low Voltage, VIL

0.4

Input High Voltage, VIH

0.7 × VDD

Pin Capacitance, CIN

DIGITAL OUTPUT (DOUT)

Output High Voltage, VOH

VDD − 0.3

ISOURCE = ISINK = 200 μA

Output Low Voltage, VOL

0.4

IOL = 200 μA

Output Capacitance, COUT

POWER REQUIREMENTS

Supply Voltage

2.7

5.5

Supply Current

Peak current while converting; SPI interface inactive

Continuous Conversion Mode

245

320

μA

VDD = 3.6 V

275

350

μA

VDD = 5.5 V

1 SPS Mode

μA

VDD = 3.6 V, TA = 25°C

μA

VDD = 5.5 V, TA = 25°C

Shutdown Mode

2.5

μA

VDD = 3.6 V

5.4

μA

VDD = 5.5 V

Power Dissipation

Power dissipated for VDD = 3.6 V, TA = 25°C

Continuous Conversion Mode

880

μW

1 SPS Mode

200

μW

Shutdown Mode

μW

1 Accuracy includes lifetime drift.

2 Based on a floating average of 10 readings.

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