Supply Voltage

+12V to −0.2V

Output Voltage

(+V

Output Current

10 mA

Storage Temperature

−65˚C to +150˚C

Lead Temperature:

SOT Package (Note 2):

Vapor Phase (60 seconds)

215˚C

Infrared (15 seconds)

220˚C

T

Junction Temperature

150˚C

ESD Susceptibility (Note 3):

Human Body Model

Machine Model

2000V

250V

Specified Temperature Range:

T

LM50C

−40˚C to +125˚C

LM50B

−25˚C to +100˚C

Operating Temperature Range

−40˚C to +150˚C

θ

450˚C/W

Supply Voltage Range (+V

+4.5V to +10V

Electrical Characteristics

Unless otherwise noted, these specifications apply for V

limits apply for the specified T

Parameter

Conditions

LM50B

LM50C

Units

(Limit)

Typical

Limit

Typical

Limit

(Note 5)

(Note 5)

Accuracy

T

˚C (max)

(Note 6)

T

˚C (max)

T

+3.0, −3.5

˚C (max)

Nonlinearity (Note 7)

˚C (max)

Sensor Gain

+9.7

+9.7

mV/˚C (min)

(Average Slope)

+10.3

+10.3

mV/˚C (max)

Output Resistance

2000

4000

2000

4000

Ω (max)

Line Regulation

+4.5V

≤ V

mV/V (max)

(Note 8)

mV/V (max)

Quiescent Current

+4.5V

≤ V

130

130

µA (max)

(Note 9)

180

180

µA (max)

Change of Quiescent

+4.5V

≤ V

2.0

2.0

µA (max)

Current (Note 9)

Temperature Coefficient of

+1.0

+2.0

µA/˚C

Quiescent Current

Long Term Stability (Note 10)

T

˚C

1000 hours

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating

the device beyond its rated operating conditions.

Note 2: See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” or the section titled “Surface Mount” found in a current National Semicon-

ductor Linear Data Book for other methods of soldering surface mount devices.

Note 3: Human body model, 100 pF discharged through a 1.5 k

Ω resistor. Machine model, 200 pF discharged directly into each pin.

Note 4: Thermal resistance of the SOT-23 package is specified without a heat sink, junction to ambient.

Note 5: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).

Note 6: Accuracy is defined as the error between the output voltage and 10mv/˚C times the device’s case temperature plus 500 mV, at specified conditions of volt-

age, current, and temperature (expressed in ˚C).

Note 7: Nonlinearity is defined as the deviation of the output-voltage-versus-temperature curve from the best-fit straight line, over the device’s rated temperature

range.

Note 8: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output due to heating effects can be com-

puted by multiplying the internal dissipation by the thermal resistance.

Note 9: Quiescent current is defined in the circuit of

Figure 1 .

Note 10: For best long-term stability, any precision circuit will give best results if the unit is aged at a warm temperature, and/or temperature cycled for at least 46

hours before long-term life test begins. This is especially true when a small (Surface-Mount) part is wave-soldered; allow time for stress relaxation to occur. The ma-

jority of the drift will occur in the first 1000 hours at elevated temperatures. The drift after 1000 hours will not continue at the first 1000 hour rate.

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