Electrical Characteristics

Unless otherwise noted, these specifications apply for +V

T

Symbol

Parameter

Conditions

Typical

(Note 6)

Limits (Note 7)

Units

(Limit)

Sensor Gain

GS1 = 0, GS0 = 0

GS1=0,GS1=1

GS1=1,GS0=0

GS1=1,GS0=1

-5.5

-8.2

-10.9

-13.6

mV/˚C

mV/˚C

mV/˚C

mV/˚C

Load Regulation

(Note 10)

Source

≤ 2.0 µA (Note 11)

Sink

≤ 100 µA

Sink = 50 µA

0.4

-1

1.6

mV (max)

mV (max)

mV

Line Regulation (Note

14)

(V

≥ 200 mV

200

µV/V

I

S

Supply Current

T

T

9

12

13

µA (max)

µA (max)

C

L

Output Load

Capacitance

1100

pF (max)

Power-on Time

(Note 12)

C

C

0.7

0.8

5

10

ms (max)

ms (max)

V

IH

GS1 and GS0 Input

Logic "1" Threshold

Voltage

V

V (min)

V

IL

GS1 and GS0 Input

Logic "0" Threshold

Voltage

0.5

V (max)

I

IH

Logic "1" Input Current

(Note 13)

0.001

1

µA (max)

I

IL

Logic "0" Input Current

(Note 13)

0.001

1

µA (max)

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is

functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed

specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test

conditions.

Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin. The machine model is a 200 pF capacitor discharged

directly into each pin.

Note 4: Reflow temperature profiles are different for lead-free and non-lead-free packages.

Note 5: The junction to ambient thermal resistance (

Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).

Note 8: 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.

Note 9: Changes in output due to self heating can be computed by multiplying the internal dissipation by the thermal resistance.

Note 10: Source currents are flowing out of the LM94021. Sink currents are flowing into the LM94021.

Note 12: Guaranteed by design.

Note 13: The input current is leakage only and is highest at high temperature. It is typically only 0.001µA. The 1µA limit is solely based on a testing limitation and

does not reflect the actual performance of the part.

Note 14: Line regulation is calculated by subtracting the output voltage at the highest supply voltage from the output voltage at the lowest supply voltage. The typical

line regulation specification does not include the output voltage shift discussed in Section 5.0.

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