Datasheet

LM90
www.ti.com SNIS126A –MAY 2004–REVISED MARCH 2013
Temperature-to-Digital Converter Characteristics (continued)
Unless otherwise noted, these specifications apply for V
DD
= +3.0Vdc to 3.6Vdc. Boldface limits apply for T
A
= T
J
= T
MIN
≤
T
A
≤ T
MAX
; all other limits T
A
= T
J
= +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
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 I
OUT
= 6.0 mA 0.4 V (max)
Power-On Reset Threshold Measure on V
DD
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)
0 °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 V
DD
= +3.0 to 3.6 Vdc. Boldface limits apply for T
A
= T
J
= T
MIN
to
T
MAX
; all other limits T
A
= T
J
= +25°C, unless otherwise noted.
Typical
(1)
Limits
(2)
Units
Symbol Parameter Conditions
(Limit)
SMBData, SMBCLK INPUTS
V
IN(1)
Logical “1” Input Voltage 2.1 V (min)
V
IN(0)
Logical “0”Input Voltage 0.8 V (max)
V
IN(HYST)
SMBData and SMBCLK Digital Input 400 mV
Hysteresis
I
IN(1)
Logical “1” Input Current V
IN
= V
DD
0.005 ±10 µA (max)
I
IN(0)
Logical “0” Input Current V
IN
= 0 V −0.005 ±10 µA (max)
C
IN
Input Capacitance 5 pF
ALL DIGITAL OUTPUTS
I
OH
High Level Output Current V
OH
= V
DD
10 µA (max)
V
OL
SMBus Low Level Output Voltage I
OL
= 4mA 0.4 V (max)
I
OL
= 6mA 0.6
(1) Typicals are at T
A
= 25°C and represent most likely parametric norm.
(2) Limits are ensured to AOQL (Average Outgoing Quality Level).
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