If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

LM231A/LM231

LM331A/LM331

Supply Voltage

40V

40V

Output Short Circuit to Ground

Continuous

Continuous

Output Short Circuit to V

CC

Continuous

Continuous

Input Voltage

−0.2V to +V

S

−0.2V to +V

S

T

MIN

T

MAX

T

MIN

T

MAX

Operating Ambient Temperature Range

−25˚C to +85˚C

0˚C to +70˚C

Power Dissipation (P

and Thermal Resistance (

θ

(N Package) P

D

1.25W

1.25W

θ

jA

100˚C/W

100˚C/W

Lead Temperature (Soldering, 10 sec.)

Dual-In-Line Package (Plastic)

260˚C

260˚C

ESD Susceptibility (Note 4)

N Package

500V

500V

Electrical Characteristics

T

Parameter

Conditions

Min

Typ

Max

Units

VFC Non-Linearity (Note 3)

4.5V

≤ V

% Full-

Scale

T

% Full-

Scale

VFC Non-Linearity

V

%Full-

In Circuit of

Figure 1

Scale

Conversion Accuracy Scale Factor (Gain)

V

LM231, LM231A

0.95

1.00

1.05

kHz/V

LM331, LM331A

0.90

1.00

1.10

kHz/V

Temperature Stability of Gain

T

LM231/LM331

ppm/˚C

LM231A/LM331A

ppm/˚C

Change of Gain with V

S

4.5V

≤ V

0.01

0.1

%/V

10V

≤ V

0.006

0.06

%/V

Rated Full-Scale Frequency

V

10.0

kHz

Gain Stability vs Time

T

% Full-

(1000 Hrs)

Scale

Overrange (Beyond Full-Scale) Frequency

V

10

%

INPUT COMPARATOR

Offset Voltage

mV

LM231/LM331

T

mV

LM231A/LM331A

T

mV

Bias Current

−80

−300

nA

Offset Current

nA

Common-Mode Range

T

−0.2

V

V

TIMER

Timer Threshold Voltage, Pin 5

0.63

0.667

0.70

x V

S

Input Bias Current, Pin 5

V

All Devices

0V

≤ V

nA

LM231/LM331

V

200

1000

nA

LM231A/LM331A

V

200

500

nA

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