MAX6681 datasheet(2/17 Pages) MAXIM

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±1°C Fail-Safe Remote/Local Temperature

Sensors with SMBus Interface

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(Circuit of Typical Operating Circuit, VCC = 3.0V to 5.5V, TA = -25°C to +125°C, unless otherwise specified. Typical values are at VCC

= 3.3V and TA = +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

VCC ...........................................................................-0.3V to +6V

DXP.............................................................-0.3V to (VCC + 0.3V)

DXN ......................................................................-0.3V to +0.8V

SMBCLK, SMBDATA,

ALERT, OVERT .....................-0.3V to +6V

RESET, INT_SEL,

STBY, ADD0, ADD1.....................-0.3V to +6V

CRIT1, CRIT0, SENS_SEL ........................................-0.3V to +6V

SMBDATA,

ALERT, OVERT, Current ..................-1mA to +50mA

DXN Current ......................................................................±1mA

Continuous Power Dissipation (TA = +70°C)

16-Pin QSOP (derate 8.3mW/°C above +70°C) ..........664mW

Junction Temperature .....................................................+150°C

Storage Temperature Range ............................-65°C to +150°C

Lead Temperature (soldering, 10s) ................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

1°C

Temperature Resolution,

Legacy Mode

Bits

0.125

°C

Temperature Resolution,

Extended Mode

Bits

TRJ = +60°C to +100°C, VCC = 3.3V

-1.0

+1.0

TRJ = +50°C to +120°C, VCC = 3.3V

-2.0

+2.0

Remote Temperature Error (Note 1)

TRJ = -55°C to +125°C, VCC = 3.3V

-3.0

+3.0

°C

TA = +60°C to +100°C, VCC = 3.3V

-1.5

+1.5

TA = 0°C to +125°C, VCC = 3.3V

-3.0

+3.0

Local Temperature Error

TA = -55°C to +125°C, VCC = 3.3V (Note 2)

-5.0

+5.0

°C

Line Regulation

3.0V

≤ VCC ≤ 5.5V

0.2

0.6

°C/V

Supply Voltage Range

VCC

3.0

5.5

Undervoltage Lockout Threshold

UVLO

Falling edge of VCC disables ADC

2.60

2.80

2.95

Undervoltage Lockout Hysteresis

Power-On Reset (POR)

Threshold

VCC, falling edge

1.5

2.0

2.5

POR Threshold Hysteresis

Legacy

62.5

Conversion Time

Extended

125

Standby Supply Current

SMBus static

µA

Operating Current

During conversion

0.55

1.0

0.25 conversions/s

Average Operating Current

(Note 3)

2 conversions/s

120

180

µA

DXP and DXN Leakage Current

In standby mode

µA

High level

100

120

Remote-Diode Source Current

IRJ

Low level

µA

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