LM90

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SNIS126A – MAY 2004 – REVISED MARCH 2013

Temperature-to-Digital Converter Characteristics (continued)

Units

Parameter

Conditions

(Limit)

Conversion Time of All Temperatures at the Fastest

31.25

34.4

ms (max)

Setting

SMBus Inactive, 16Hz conversion

0.8

1.7

mA (max)

rate

Shutdown

315

µA

D

− Source Voltage

0.7

V

Diode Source Current

(D+

− D−)=+ 0.65V; high level

160

315

µA (max)

110

µA (min)

Low level

13

20

µA (max)

7

µA (min)

ALERT and T_CRIT_A Output Saturation Voltage

0.4

V (max)

Power-On Reset Threshold

2.4

V (max)

1.8

V (min)

Local and Remote HIGH Default Temperature

+70

°C

settings

Local and Remote LOW Default Temperature

0

°C

settings

Local and Remote T_CRIT Default Temperature

+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

Units

Symbol

Parameter

Conditions

(Limit)

SMBData, SMBCLK INPUTS

Logical “1” Input Voltage

2.1

V (min)

Logical “0”Input Voltage

0.8

V (max)

SMBData and SMBCLK Digital Input

400

mV

Hysteresis

Logical “1” Input Current

0.005

±10

µA (max)

Logical “0” Input Current

−0.005

±10

µA (max)

Input Capacitance

5

pF

ALL DIGITAL OUTPUTS

High Level Output Current

10

µA (max)

SMBus Low Level Output Voltage

0.4

V (max)

0.6

(1)

(2)

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

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