ADT7420UCPZ-R2 datasheet(3/24 Pages) AD

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Preliminary Technical Data

ADT7420

Rev. PrA | Page 3 of

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

±0.202

°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

±0.50

°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

±0.75

°C

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

−0.85

°C

TA = +125°C to +150°C, VDD = 4.5V to 5.5 V

−1.0

°C

TA = +125°C to +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 Hysteresis

0.02

°C

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

Repeatability4

±0.015

°C

TA = 25°C

Drift5

0.0073

°C

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

DC PSRR

0.1

°C/V

TA = 25°C

DIGITAL OUTPUTS (OPEN DRAIN)

High Output Leakage Current, IOH

0.1

µA

CT and INT pins pulled up to 5.5 V

Output High Current

VOH = 5.5 V

Output Low Voltage, VOL

0.4

IOL = 2 mA @ 5.5 V, IOL = 1 mA @ 3.3 V

Output High Voltage, VOH

0.7 × VDD

Output Capacitance, COUT

DIGITAL INPUTS

Input Current

±1

µA

VIN = 0 V to VDD

Input Low Voltage, VIL

0.4

Input High Voltage, VIH

0.7 × VDD

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

250

µA

Peak current while converting, I2C interface inactive

At 5.5 V

230

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

Shutdown Current

At 3.3 V

2.0

µA

Supply current in shutdown mode

At 5.5 V

4.4

µA

Supply current in shutdown mode

Power Dissipation Normal Mode

700

µW

VDD = 3.3 V, normal mode at 25°C

Power Dissipation 1 SPS

150

µW

Power dissipated for VDD = 3.3 V, TA = 25°C

1 Accuracy specification includes repeatability.

2 The equivalent 3-Σ limits are ±0.15°C. This 3-Σ specification is provided to enable comparison with other vendors who use these limits.

3 For higher accuracy at 5 V operation, contact Analog Devices.

4 Based on a floating average of 10 readings.

5 Drift includes Solder Heat Resistance and life time test performed as per Jedec Standard JESD22-A108.

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