Datasheet

LM90
SNIS126A –MAY 2004–REVISED MARCH 2013 www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
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 (V
DD
+ 0.3
V)
D− 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 Temperature
VSSOP Package
(3)
Vapor Phase (60 seconds) 215°C
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 (V
I
) at any pin exceeds the power supplies (V
I
< GND or V
I
> V
DD
), 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 LM90'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 measurements.
(3) See http://www.ti.com/packaging/ for other recommendations and methods of soldering surface mount devices.
(4) Human body model, 100pF discharged through a 1.5kΩ resistor. Machine model, 200pF discharged directly into each pin.
Operating Ratings
Operating Temperature Range 0°C to +125°C
Electrical Characteristics Temperature Range T
MIN
≤ T
A
≤ T
MAX
LM90 0°C ≤ T
A
≤ +85°C
Supply Voltage Range (V
DD
) +3.0 V to +3.6 V
Temperature-to-Digital Converter Characteristics
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)
Temperature Error Using Local Diode T
A
= +25°C to +125°C
(3)
±1.5 ±4 °C (max)
Temperature Error Using Remote Diode of mobile T
A
= +30°C to T
D
= +25°C to ±3
°C (max)
Pentium III with typical non-ideality of 1.008. (T
D
is +50°C +100°C
the Remote Diode Junction Temperature)
T
A
= +0°C to +85°C T
D
= +25°C to ±4 °C (max)
+125°C
Remote Diode Measurement Resolution 11 Bits
0.125 °C
Local Diode Measurement Resolution 8 Bits
1 °C
(1) Typicals are at T
A
= 25°C and represent most likely parametric norm.
(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 LM90 and the thermal resistance. See
()
for the thermal resistance to be used in the self-heating
calculation.
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