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LM75B データシート(PDF) 4 Page - Texas Instruments

部品番号 LM75B
部品情報  LM75C Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface
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ホームページ  http://www.ti.com
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LM75B データシート(HTML) 4 Page - Texas Instruments

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LM75B, LM75C
SNIS153B – JULY 2009 – REVISED MARCH 2013
www.ti.com
Thermal
Package
Device Number
Resistance
Number
(
θJA)
LM75BIM-3, LM75BIM-5,
D (R-PDSO-G8)
200°C/W
LM75CIM-3, LM75CIM-5
LM75BIMM-3, LM75BIMM-5,
DGK (S-PDSO-
250°C/W
LM75CIMM-3, LM75CIMM-5
G8)
Temperature-to-Digital Converter Characteristics
(1)
Unless otherwise noted, these specifications apply for: +VS = +5 Vdc for LM75BIM-5, LM75BIMM-5, LM75CIM-5, and
LM75CIMM-5; and +VS = +3.3 Vdc for LM75BIM-3, LM75BIMM-3, LM75CIM-3, and LM75CIMM-3
(2). Boldface limits apply
for TA = TJ = TMIN to TMAX; all other limits TA = TJ = +25°C, unless otherwise noted.
Parameter
Conditions
Typical(3)
Limits(4)
Units (Limit)
TA = −25°C to +100°C
±2.0
Accuracy
°C (max)
TA = −55°C to +125°C
±3.0
Resolution
9
Bits
Temperature Conversion Time
See(5)
100
300
ms (max)
I2C Inactive
0.25
0.5
mA (max)
LM75B
Shutdown Mode, +VS = 3V
4
μA
Shutdown Mode, +VS = 5V
6
Quiescent Current
I2C Inactive
0.25
1.0
mA (max)
LM75C
Shutdown Mode, +VS = 3V
4
μA
Shutdown Mode, +VS = 5V
6
O.S. Output Saturation Voltage
IOUT = 4.0 mA
0.8
V (max)
(6)1
Conversion (min)
O.S. Delay
6
Conversions (max)
TOS Default Temperature
80
See(7)
°C
THYST Default Temperature
75
(1)
For best accuracy, minimize output loading. Higher sink currents can affect sensor accuracy with internal heating. This can cause an
error of 0.64°C at full rated sink current and saturation voltage based on junction-to-ambient thermal resistance.
(2)
All part numbers of the LM75 will operate properly over the +VS supply voltage range of 3V to 5.5V. The devices are tested and
specified for rated accuracy at their nominal supply voltage. Accuracy will typically degrade 1°C/V of variation in +VS as it varies from
the nominal value.
(3)
Typicals are at TA = 25°C and represent most likely parametric norm.
(4)
Limits are specified to AOQL (Average Outgoing Quality Level).
(5)
The conversion-time specification is provided to indicate how often the temperature data is updated. The LM75 can be accessed at any
time and reading the Temperature Register will yield result from the last temperature conversion. When the LM75 is accessed, the
conversion that is in process will be interrupted and it will be restarted after the end of the communication. Accessing the LM75
continuously without waiting at least one conversion time between communications will prevent the device from updating the
Temperature Register with a new temperature conversion result. Consequently, the LM75 should not be accessed continuously with a
wait time of less than 300 ms.
(6)
O.S. Delay is user programmable up to 6 “over limit” conversions before O.S. is set to minimize false tripping in noisy environments.
(7)
Default values set at power up.
4
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Product Folder Links: LM75B LM75C


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