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LM76 データシート(PDF) 4 Page - Texas Instruments

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部品番号 LM76
部品情報  Sign Digital Temperature Sensor and Thermal Window Comparator with Two-Wire Interface
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
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LM76 データシート(HTML) 4 Page - Texas Instruments

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LM76
SNIS109E – JANUARY 2000 – REVISED MARCH 2013
www.ti.com
Temperature-to-Digital Converter Characteristics
Unless otherwise noted, these specifications apply for +VS = +5.0 Vdc ±10% for the LM76CHM-5.
(1). Boldface limits apply
for TA = TJ = TMIN to TMAX; all other limits TA = TJ = +25°C, unless otherwise noted.
Typical(2)
LM76CNM-3
LM76CHM-5
Units
Parameter
Conditions
Limits(3)
Limits(3)
(Limit)
TA = +70°C to +100°C
±1.0
TA = −20°C to +85°C for
±1.5
LM76CHM-5
Accuracy(1)
TA = −10°C to +45°C
±1.0
TA = +25°C
±0.5
13
Bits
Resolution
See(4)
0.0625
°C
Temperature Conversion Time
See(5)
400
500
1000
ms
I2C Inactive
0.25
mA
I2C Active
0.25
0.5
0.45
mA (max)
Shutdown Mode:
5
µA
Quiescent Current
12
18
µA (max)
TA = +85°C
8
µA (max)
TA = +25°C
12
µA (max)
THYST Default Temperature
See(6)(7)
2
°C
TLOW Default Temperature
See(7)
10
°C
THIGH Default Temperature
See(7)
64
°C
TCRIT Default Temperature
See(7)
80
°C
(1)
The LM76 will operate properly over the +VS supply voltage range of 3V to 5.5V for the LM76CNM-3 and the LM76CHM-5. The
LM76CNM-3 is tested and specified for rated accuracy at the nominal supply voltage of 3.3V. Accuracy of the LM76CNM-3 will degrade
0.2°C for a ±1% variation in +VS from the nominal value. The LM76CHM-5 is tested and specified for a rated accuracy at the nominal
supply voltage of 5.0V. Accuracy of the LM76CHM-5 will degrade 0.08°C for a ±1% variation in +VS from the nominal value.
(2)
Typicals are at TA = 25°C and represent most likely parametric norm.
(3)
Limits are ensured to AOQL (Average Outgoing Quality Level).
(4)
12 bits + sign, two's complement
(5)
This specification is provided only to indicate how often temperature data is updated. The LM76 can be read at any time without regard
to conversion state (and will yield last conversion result). If a conversion is in process it will be interrupted and restarted after the end of
the read.
(6)
Hysteresis value adds to the TLOW setpoint value (e.g.: if TLOW setpoint = 10°C, and hysteresis = 2°C, then actual hysteresis point is
10+2 = 12°C); and subtracts from the THIGH and T_CRIT setpoints (e.g.: if THIGH setpoint = 64°C, and hysteresis = 2°C, then actual
hysteresis point is 64
−2 = 62°C). For a detailed discussion of the function of hysteresis refer to TEMPERATURE COMPARISON, and
Figure 6.
(7)
Default values set at power up.
4
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