0

500

1,000

1,500

2,000

2,500

3,000

3,500

-50

-25

0

25

50

75

100

125

150

175

TEMPERTURE (

SC)

J2 (-5.166mV/°C)

J3 (-7.752mV/°C)

J4 (-10.339mV/°C)

J5 (-12.924mV/°C)

C101

LM57-Q1

www.ti.com

SNIS191A – JULY 2015 – REVISED JULY 2015

7.3 Feature Description

7.3.1

LM57-Q1 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 or bold red italics in Table 1. Temperatures

above 150°C apply to the LM57FSPWQ1 and LM57TSPWQ1 only and are highlighted in red and italics 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-Q1 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 or red on this table. Temperatures above 150°C apply to the LM57FSPWQ1 and LM57TSPWQ1 only and

are italicized and highlighted in red. The VTEMP gain is selected by the RSENSE resistors. VTEMP is valid over the entire temperature

range.

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