LM99 datasheet(4/30 Pages) TI

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LM99

SNIS129D – JANUARY 2003 – REVISED MARCH 2013

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Absolute Maximum Ratings

(1)

Supply Voltage

−0.3 V to 6.0 V

Voltage at SMBData, SMBCLK, ALERT, T_CRIT_A

−0.5 V to 6.0 V

Voltage at Other Pins

−0.3 V to (VDD

+ 0.3 V)

− Input Current

±1 mA

Input Current at All Other Pins(2)

±5 mA

Package Input Current(2)

30 mA

SMBData, ALERT, T_CRIT_A Output Sink Current

10 mA

Storage Temperature

−65°C to

+150°C

Soldering Information, Lead

VSSOP-8 Packages(3)

Vapor Phase (60 seconds)

215°C

Temperature

Infrared (15 seconds)

220°C

ESD Susceptibility(4)

Human Body Model

2000 V

Machine Model

200 V

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not

apply when operating the device beyond its rated operating conditions.

(2)

When the input voltage (VI) at any pin exceeds the power supplies (VI < GND or VI > VDD), the current at that pin should be limited to 5

mA. Parasitic components and or ESD protection circuitry are shown in the figure below for the LM99's pins. The nominal breakdown

voltage of D3 is 6.5 V. Care should be taken not to forward bias the parasitic diode, D1, present on pins: D+, D

−. Doing so by more than

50 mV may corrupt a temperature measurement.

(3)

See http://www.ti.com/packaging for other recommendations and methods of soldering surface mount devices.

(4)

Human body model, 100 pF discharged through a 1.5 k

Ω resistor. Machine model, 200 pF discharged directly into each pin.

Operating Ratings

Operating Temperature Range

0°C to +125°C

Electrical Characteristics Temperature Range(1)

TMIN ≤ TA ≤ TMAX

LM99

0°C

≤ TA≤ +85°C

Supply Voltage Range (VDD)

+3.0 V to +3.6 V

(1)

Thermal resistance junction-to-ambient when attached to a printed circuit board with 2 oz. foil:

— VSSOP-8 = 210°C/W

Temperature-to-Digital Converter Characteristics

Unless otherwise noted, these specifications apply for VDD = +3.0 Vdc to +3.6 Vdc. Boldface limits apply for TA = TJ = TMIN

≤ TA ≤ TMAX; all other limits TA = TJ = +25°C, unless otherwise noted.

Typical(1)

Limits(2)

Units

Parameter

Conditions

(Limit)

Temperature Error Using Local Diode

TA = +25°C to +125°C

(3)

±1

±3

°C (max)

Temperature Error Using Remote Diode Connected

TA = +30°C to +50°C and TD =

±1

°C (max)

Transistor (TD is the Remote Diode Junction

+120°C to +140°C

Temperature)

TA = +0°C to +85°C and TD = +25°C

°C (max)

±3

TD = TLM99 + 16°C

to +140°C

Remote Diode Measurement Resolution

Bits

0.125

°C

Local Diode Measurement Resolution

Bits

°C

Conversion Time of All Temperatures at the Fastest

See(4)

31.25

34.4

ms (max)

Setting

(1)

Typicals are at TA = 25°C and represent most likely parametric normal.

(2)

Limits are ensured to AOQL (Average Outgoing Quality Level).

(3)

Local temperature accuracy does not include the effects of self-heating. The rise in temperature due to self-heating is the product of the

internal power dissipation of the LM99 and the thermal resistance. See Note 1 of the Operating Ratings table for the thermal resistance

to be used in the self-heating calculation.

(4)

This specification is provided only to indicate how often temperature data is updated. The LM99 can be read at any time without regard

to conversion state (and will yield last conversion result).

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