ADT7420UCPZ-R2 datasheet(3/24 Pages) AD

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Data Sheet

ADT7420

Rev. 0 | Page 3 of 24

SPECIFICATIONS

TA = −40°C to +125°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

0.0017

±0.202

°C

TA = −10°C to +85°C, VDD = 3.0 V

±0.25

°C

TA = −20°C to +105°C, VDD = 2.7 V to 3.3 V

±0.31

°C

TA = −40°C to +105°C, VDD = 3.0 V

±0.35

°C

TA = −40°C to +105°C, VDD = 2.7 V to 3.3 V

±0.50

°C

TA = −40°C to +125°C, VDD = 2.7 V to 3.3 V

±0.503

°C

TA = −10°C to +105°C, VDD = 4.5 V to 5.5 V

±0.66

°C

TA = −40°C to +125°C, VDD = 4.5 V to 5.5 V

−0.85

°C

TA = +150°C, VDD = 4.5 V to 5.5 V

−1.0

°C

TA = +150°C, VDD = 2.7 V to 3.3 V

ADC Resolution

Bits

Twos complement temperature value of the

sign bit plus 12 ADC bits (power-up default

resolution)

Bits

Twos complement temperature value of the

sign bit plus 15 ADC bits (Bit 7 = 1 in the

configuration register)

Temperature Resolution

13-Bit

0.0625

°C

13-bit resolution (sign + 12-bit)

16-Bit

0.0078

°C

16-bit resolution (sign + 15-bit)

Temperature Conversion Time

240

Continuous conversion and one-shot

conversion modes

Fast Temperature Conversion Time

First conversion on power-up only

1 SPS Conversion Time

Conversion time for 1 SPS mode

Temperature Hysteresis4

±0.002

°C

Temperature cycle = 25°C to 125°C and back

to 25°C

Repeatability5

±0.015

°C

TA = 25°C

Drift6

0.0073

°C

500 hour stress test at +150°C with VDD = 5.0 V

DC PSRR

0.1

°C/V

TA = 25°C

DIGITAL OUTPUTS (CT, INT, SDA—OPEN DRAIN)

High Output Leakage Current, IOH

0.1

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 (SCL, SDA, A0, A1)

Input Current

±1

µA

VIN = 0 V to VDD

Input Low Voltage, VIL

0.3 × VDD

SCL and SDA only

0.4

A0 and A1 only

Input High Voltage, VIH

0.7 × VDD

SCL and SDA only

A0 and A1 only

SCL, SDA Glitch Rejection

Input filtering suppresses noise spikes of less

than 50 ns

Pin Capacitance

POWER REQUIREMENTS

Supply Voltage

2.7

5.5

Supply Current

At 3.3 V

210

265

µA

Peak current while converting, I2C interface

inactive

At 5.5 V

250

300

µA

Peak current while converting, I2C interface

inactive

1 SPS Current

At 3.3 V

µA

VDD = 3.3 V, 1 SPS mode, TA = 25°C

At 5.5 V

µA

VDD = 5.5 V, 1 SPS mode, TA = 25°C

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