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LM57 Datasheet(PDF) 13 Page - Texas Instruments

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Part # LM57
Description  Resistor-Programmable Temperature Switch and Analog Temperature Sensor
PDF  40 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM57 Datasheet(HTML) 13 Page - Texas Instruments

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0
500
1,000
1,500
2,000
2,500
3,000
3,500
-50
-25
0
25
50
75
100
125
150
TEMPERTURE (
SC)
J2 (-5.166mV/°C)
J3 (-7.752mV/°C)
J4 (-10.339mV/°C)
J5 (-12.924mV/°C)
C101
LM57
www.ti.com
SNIS152E – MAY 2009 – REVISED JULY 2015
8.3 Feature Description
8.3.1
LM57 VTEMP Temperature-to-Voltage Transfer Function
The value of the RSENSE resistors select a trip point and a corresponding VTEMP gain (J2, J3, J4, or J5).The trip
point range associated with a given gain is shown in bold green in Table 1. The VTEMP gain is selected by the
RSENSE resistors. VTEMP is valid over the entire temperature range. The VTEMP gain is selected by the RSENSE
resistors. VTEMP is valid over the entire temperature range.
Figure 12. Temperature Transfer Characteristics
Table 1. LM57 VTEMP Temperature to Voltage
(1)
VTEMP VOLTAGE (mV)
Temperature (°C)
J2 (-5.166 mV/°C)
J3 (–7.752 mV/°C)
J4 (–10.339 mV/°C)
J5 (–12.924 mV/°C)
–50
1352.56
2028.80
2705.20
3381.40
–49
1347.60
2021.35
2695.26
3368.98
–48
1342.64
2013.90
2685.32
3356.55
–47
1337.67
2006.44
2675.38
3344.12
–46
1332.70
1998.98
2665.43
3331.68
–45
1327.73
1991.52
2655.47
3319.23
–44
1322.76
1984.05
2645.51
3306.78
–43
1317.78
1976.58
2635.54
3294.32
–42
1312.81
1969.11
2625.57
3281.85
–41
1307.82
1961.63
2615.60
3269.38
–40
1302.84
1954.15
2605.62
3256.90
–39
1297.86
1946.66
2595.63
3244.41
–38
1292.87
1939.17
2585.64
3231.92
–37
1287.88
1931.68
2575.64
3219.42
–36
1282.88
1924.18
2565.64
3206.92
–35
1277.89
1916.68
2555.63
3194.41
–34
1272.89
1909.17
2545.62
3181.89
(1)
The RSENSE resistors select a trip point and a corresponding VTEMP gain (J2, J3, J4, or J5). The trip point range associated with a given
gain is shown in bold green on this table. VTEMP is valid over the entire temperature range.
Copyright © 2009–2015, Texas Instruments Incorporated
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