Datasheet

LM70
SNIS112G –JUNE 2000–REVISED MARCH 2013 www.ti.com
Absolute Maximum Ratings
(1)
Supply Voltage −0.3V to 6.0V
Voltage at any Pin −0.3V to V
+
+ 0.3V
Input Current at any Pin
(2)
5 mA
Package Input Current
(2)
20 mA
Storage Temperature −65°C to +150°C
Soldering Information, Lead Temperature
VSSOP-8 and WSON-8 Packages
(3)
Vapor Phase (60 seconds) 215°C
Infrared (15 seconds) 220°C
ESD Susceptibility
(4)
Human Body Model 3000V
Machine Model 300V
(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
S
) the current at that pin should be limited to 5
mA. The 20 mA maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input
current of 5 mA to four.
(3) See the section titled “Surface Mount” found in a current Linear Data Book for other methods of soldering surface mount devices.
(4) Human body model, 100 pF discharged through a 1.5 kΩ resistor. Machine model, 200 pF discharged directly into each pin.
Operating Ratings
Specified Temperature Range T
MIN
to T
MAX
See
(1)
−55°C to +150°C
Supply Voltage Range (+V
S
) +2.65V to +5.5V
(1) The life expectancy of the LM70 will be reduced when operating at elevated temperatures. LM70 θ
JA
(thermal resistance, junction-to-
ambient) when attached to a printed circuit board with 2 oz. foil is summarized in the table below:Device Number LM70CILD Thermal
Resistance (θJA), 51.3°C/W, Device Number LM70CIMM Thermal Resistance (θJA), 200°C/W
Temperature-to-Digital Converter Characteristics
Unless otherwise noted, these specifications apply for V
+
= 2.65V to 3.6V for the LM70-3 and V
+
= 4.5V to 5.5V for the LM70-
5
(1)
. 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.
LM70-5 LM70-3 Units
Parameter Test Conditions Typical
(2)
Limits
(3)
Limits
(3)
(Limit)
Temperature Error
(1)
T
A
= −10°C to +65°C +1.5/−2.0 +1.5/−2.0 °C (max)
T
A
= −40°C to +85°C ±2.0 ±2.0 °C (max)
T
A
= −55°C to +125°C +3.0/−2.0 +3.0/−2.0 °C (max)
T
A
= −55°C to +150°C +3.5/−2.0 +3.5/−2.0 °C (max)
Resolution 11 Bits
0.25 °C
Temperature Conversion Time See
(4)
140 210 210 ms (max)
Quiescent Current Serial Bus Inactive 260 490 490 μA (max)
Serial Bus Active 260 μA
Shutdown Mode 12 μA
(1) Both part numbers of the LM70 will operate properly over the V
+
supply voltage range of 2.65V to 5.5V. The temperature error for
temperature ranges of −10°C to +65°C, −40°C to +85°C, −55°C to +125°C and −55°C to +150°C include error induced by power supply
variation of ±5% from the nominal value. Temperature error will increase by ±0.3°C for a power supply voltage (V
+
) variation of ±10%
from the nominal value.
(2) Typicals are at T
A
= 25°C and represent most likely parametric norm.
(3) Limits are guaranteed to AOQL (Average Outgoing Quality Level).
(4) This specification is provided only to indicate how often temperature data is updated. The LM70 can be read at any time without regard
to conversion state (and will yield last conversion result). A conversion in progress will not be interrupted. The output shift register will be
updated at the completion of the read and a new conversion restarted.
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