LMT85DCKT datasheet(6/26 Pages) TI

Part #	LMT85DCKT

Description	SC70/TO-92, Analog Temperature Sensors with Class-AB Output

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Manufacturer	TI [Texas Instruments]

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LMT85, LMT85-Q1

SNIS168C – MARCH 2013 – REVISED OCTOBER 2015

www.ti.com

7.5 Thermal Information

(1)

LMT85/

LMT85

LMT85-Q1

THERMAL METRIC(2)

UNIT

DCK

LP

5 PIN

3 PIN

RθJA

Junction-to-ambient thermal resistance (3)(4)

275

167

RθJC(top)

Junction-to-case (top) thermal resistance

84

90

RθJB

Junction-to-board thermal resistance

56

146

°C/W

ψJT

Junction-to-top characterization parameter

1.2

35

ψJB

Junction-to-board characterization parameter

55

146

(1)

For information on self-heating and thermal response time see section Mounting and Thermal Conductivity.

(2)

For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

(3)

The junction to ambient thermal resistance, RθJA, is specified without a heat sink in still air.

(4)

Changes in output due to self heating can be computed by multiplying the internal dissipation by the thermal resistance.

7.6 Accuracy Characteristics

These limits do not include DC load regulation. These stated accuracy limits are with reference to the values in Table 1.

PARAMETER

TEST CONDITIONS

MIN(1)

TYP(2)

MAX (1)

UNIT

TA = TJ= 20°C to 150°C; VDD = 1.8 V to 5.5 V

-2.7

±0.4

2.7

°C

TA = TJ= 0°C to 150°C; VDD = 1.9 V to 5.5 V

-2.7

±0.7

2.7

°C

Temperature accuracy (3)

TA = TJ= 0°C to 150°C; VDD = 2.6 V to 5.5 V

±0.3

°C

TA = TJ= –50°C to 0°C; VDD = 2.3 V to 5.5 V

-2.7

±0.7

2.7

°C

TA = TJ= –50°C to 0°C; VDD = 2.9 V to 5.5 V

±0.25

°C

(1)

Limits are specific to TI's AOQL (Average Outgoing Quality Level).

(2)

Typicals are at TJ = TA = 25°C and represent most likely parametric norm.

(3)

Accuracy is defined as the error between the measured and reference output voltages, tabulated in the Transfer Table at the specified

conditions of supply gain setting, voltage, and temperature (expressed in °C). Accuracy limits include line regulation within the specified

conditions. Accuracy limits do not include load regulation; they assume no DC load.

7.7 Electrical Characteristics

Unless otherwise noted, these specifications apply for VDD = +1.8V to +5.5V. MIN and MAX limits apply for TA = TJ = TMIN to

TMAX, unless otherwise noted; typical values apply for TA = TJ = 25°C.

PARAMETER

TEST CONDITIONS

MIN (1)

TYP (2)

MAX (1)

UNIT

Average sensor gain (output

-30°C and 90°C used to calculate average sensor gain

–8.2

mV/°C

transfer function slope)

Source

≤ 50 μA, (VDD - VOUT) ≥ 200 mV

–1

–0.22

mV

Load regulation (3)

Sink

≤ 50 μA, VOUT ≥ 200 mV

0.26

1

mV

Line regulation (4)

200

μV/V

IS

TA = TJ = 30°C to 150°C, (VDD - VOUT) ≥ 100 mV

5.4

8.1

μA

Supply current

TA = TJ = -50°C to 150°C, (VDD - VOUT) ≥ 100 mV

5.4

9

μA

CL

Output load capacitance

1100

pF

Power-on time (5)

CL= 0 pF to 1100 pF

0.7

1.9

ms

Output drive

TA = TJ = 25°C

–50

+50

µA

(1)

Limits are specific to TI's AOQL (Average Outgoing Quality Level).

(2)

Typicals are at TJ = TA = 25°C and represent most likely parametric norm.

(3)

Source currents are flowing out of the LMT85/LMT85-Q1. Sink currents are flowing into the LMT85/LMT85-Q1.

(4)

Line regulation (DC) is calculated by subtracting the output voltage at the highest supply voltage from the output voltage at the lowest

supply voltage. The typical DC line regulation specification does not include the output voltage shift discussed in Output Voltage Shift.

(5)

Specified by design and characterization.

6

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