ADT7485AARMZ-REEL7 datasheet(3/16 Pages) AD

Part #	ADT7485AARMZ-REEL7

Description	SST Digital Temperature Sensor and Voltage Monitor

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Manufacturer	AD [Analog Devices]

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ADT7485A

Rev. 0 | Page 3 of 16

SPECIFICATIONS

TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted.

Table 1.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

POWER SUPPLY

Supply Voltage, VCC

3.0

3.3

3.6

V

Undervoltage Lockout Threshold

2.8

V

Average Operating Supply Current, IDD

3.8

5

mA

Continuous conversions

TEMPERATURE-TO-DIGITAL CONVERTER

Local Sensor Accuracy

+1

±1.75

°C

40°C

≤ T

A

≤ 70°C; V

CC

= 3.3 V ±5%

±4

°C

−40°C

≤ T

A

≤ +100°C

Remote Sensor Accuracy

±1

°C

−40°C

≤T

D

≤ +125°C; T

A

= 25°C; VCC = 3.3 V

+1

±1.75

°C

−40°C

≤ T

D

≤ +125°C; −40 ≤T

A

≤ 70°C;

VCC = 3.3 V ±5%

±4

°C

−40°C

≤T

D

≤ +125°C; −40 ≤T

A

≤ +100°C

Remote Sensor Source Current

12

μA

Low level

80

μA

Mid level

204

μA

High level

Resolution

0.016

°C

Series Resistance Cancellation

1.5

kΩ

The ADT7485A cancels 1.5 kΩ in series

with the remote thermal diode

DIGITAL INPUT (ADD)

Input High Voltage, VIH

2.3

V

Input Low Voltage, VIL

0.8

V

Input High Current, IIH

−1

μA

VIN = VCC

Input Low Current, IIL

1

μA

VIN = 0

Pin Capacitance

5

pF

ANALOG-TO-DIGITAL CONVERTER

(Including Multiplexer and Attenuators)

Total Unadjusted Error (TUE)

±2

%

12V and 5V channels

±1.5

%

For all other channels

Differential Nonlinearity (DNL)

±1

LSB

10 bits

Power Supply Sensitivity

±0.1

%/V

Conversion Time (Voltage Input)1

11

ms

Averaging enabled

Conversion Time (Local Temperature)1

12

ms

Averaging enabled

Conversion Time (Remote Temperature)1

38

ms

Averaging enabled

Total Monitoring Cycle Time1

145

ms

Averaging enabled

Input Resistances

VCCP and 2.5V Channels

80

110

140

kΩ

5V Channel

230

290

350

kΩ

12V Channel

180

230

280

kΩ

DIGITAL I/O (SST Pin)

Input High Voltage , VIH

1.1

V

Input Low Voltage, VIL

0.4

V

Hysteresis1

150

mV

Between input switching levels

Output High Voltage, VOH

1.1

1.9

V

ISOURCE = 6 mA (maximum)

High Impedance State Leakage, ILEAK

±1

μA

Device powered on SST bus;

VSST = 1.1 V, VCC = 3.3 V

High Impedance State Leakage, ILEAK

±10

μA

Device unpowered on SST bus;

VSST = 1.1 V, VCC = 0 V

Signal Noise Immunity, VNOISE

300

mV p-p

Noise glitches from 10 MHz to 100 MHz;

width up to 50 ns

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