LM90 datasheet(5/32 Pages) TI

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LM90

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SNIS126A – MAY 2004 – REVISED MARCH 2013

Temperature-to-Digital Converter Characteristics (continued)

Unless otherwise noted, these specifications apply for VDD= +3.0Vdc to 3.6Vdc. 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)

Conversion Time of All Temperatures at the Fastest

See (4)

31.25

34.4

ms (max)

Setting

Quiescent Current (5)

SMBus Inactive, 16Hz conversion

0.8

1.7

mA (max)

rate

Shutdown

315

µA

− Source Voltage

0.7

Diode Source Current

(D+

− D−)=+ 0.65V; high level

160

315

µA (max)

110

µA (min)

Low level

µA (max)

µA (min)

ALERT and T_CRIT_A Output Saturation Voltage

IOUT = 6.0 mA

0.4

V (max)

Power-On Reset Threshold

Measure on VDD input, falling edge

2.4

V (max)

1.8

V (min)

Local and Remote HIGH Default Temperature

See (6)

+70

°C

settings

Local and Remote LOW Default Temperature

See (6)

°C

settings

Local and Remote T_CRIT Default Temperature

See (6)

+85

°C

Setting

(4)

This specification is provided only to indicate how often temperature data is updated. The LM90 can be read at any time without regard

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

(5)

Quiescent current will not increase substantially with an SMBus.

(6)

Default values set at power up.

Logic Electrical Characteristics

DIGITAL DC CHARACTERISTICS

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

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

Typical(1)

Limits(2)

Units

Symbol

Parameter

Conditions

(Limit)

SMBData, SMBCLK INPUTS

VIN(1)

Logical “1” Input Voltage

2.1

V (min)

VIN(0)

Logical “0”Input Voltage

0.8

V (max)

VIN(HYST)

SMBData and SMBCLK Digital Input

400

Hysteresis

IIN(1)

Logical “1” Input Current

VIN = VDD

0.005

±10

µA (max)

IIN(0)

Logical “0” Input Current

VIN = 0 V

−0.005

±10

µA (max)

CIN

Input Capacitance

ALL DIGITAL OUTPUTS

IOH

High Level Output Current

VOH = VDD

µA (max)

VOL

SMBus Low Level Output Voltage

IOL = 4mA

0.4

V (max)

IOL = 6mA

0.6

(1)

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

(2)

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

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