LM81 datasheet(4/32 Pages) NSC

4 / 32 page

Absolute Maximum Ratings (Notes 1, 2)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Positive Supply Voltage (V

+6.0V

Voltage on Any Input or Output Pin:

+12Vin, T_CRIT_A

−0.3V to +15V

A0, A1, DACOut

−0.3V to (V

++ 0.3V)

+2.5Vin, +3.3Vin

(Note 3)

All other pins

−0.3V to +6V

Input Current at any Pin (Note 4)

±5mA

Package Input Current (Note 4)

±20 mA

Maximum Junction Temperature

J max)

150˚C

ESD Susceptibility (Note 6)

Human Body Model

2000V

Machine Model

200V

Soldering Information

MTC Package (Note 7) :

Vapor Phase (60 seconds)

215˚C

Infrared (15 seconds)

235˚C

Storage Temperature

−65˚C to +150˚C

Operating Ratings (Notes 1, 2)

Operating Temperature Range

MIN ≤ TA ≤ TMAX

LM81

−55˚C

≤ T

A ≤ +125˚C

Specified Temperature Range

MIN ≤ TA ≤ TMAX

LM81

−40˚C

≤ T

A ≤ +125˚C

Junction to Ambient Thermal Resistance (

JA (Note 5))

NS Package Number: MTC24B

95˚C/W

Supply Voltage (V

+2.8V to +3.8V

IN Voltage Range:

+12Vin

−0.05V to +15V

+5Vin

−0.05V to +6.8V

+3.3Vin

−0.05V to +4.6V

+2.5Vin

−0.05V to +3.6V

VID0 - VID4, Vccp

−0.05V to +6.0V

All other inputs

−0.05V to (V

+ + 0.05V)

DC Electrical Characteristics

The following specifications apply for +2.8V

DC ≤ V

≤ +3.8V

DC,RS = 500Ω, unless otherwise specified. Boldface limits apply

for T

A = TJ = TMIN to TMAX; all other limits TA = TJ = 25˚C. (Note 8)

Symbol

Parameter

Conditions

Typical

Limits

Units

(Note 9)

(Note 10)

(Limits)

POWER SUPPLY CHARACTERISTICS

Supply Current

Interface Inactive

400

900

µA (max)

TEMPERATURE-TO-DIGITAL CONVERTER CHARACTERISTICS

Error

−40˚C

≤ T

A ≤ +125˚C

±3

˚C (max)

Resolution

9-bit mode

12-bit mode

0.5

0.0625

˚C (min)

LM81 ANALOG-TO-DIGITAL CONVERTER CHARACTERISTICS

Resolution

bits

TUE

Total Unadjusted Error

+2.5Vin,

+3.3Vin, +5Vin

(Notes 11, 12)

+0.8

% (max)

% (min)

Vccp1, Vccp2

(Note 11)

+2.4

% (max)

% (min)

+12Vin

(Notes 11, 12)

+3.1

+1.2

% (max)

% (min)

DNL

Differential Non-Linearity

±1

LSB (max)

PSS

Power Supply Sensitivity

±0.4

%/V

Total Monitoring Cycle Time

(Note 13)

9-bit Temp Resolution

12-bit Temp Resolution

0.4

0.82

1.2

sec

sec (max)

ADC INPUT CHARACTERISTICS

Input Resistance (All analog inputs except

Vccp1 and Vccp2)

115

Ω (min)

Vccp1 and Vccp2 DC Input Current

±1µA

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