LM71, LM71-Q1

SNIS125D – MARCH 2004 – REVISED MARCH 2013

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Device Number

Thermal Resistance (

LM71CIMF/LM71QCIMF

250°C/W

LM71CISD

57.6°C/W

Temperature-to-Digital Converter Characteristics

Unless otherwise noted, these specifications apply for V

LM71CIMF

Units

Parameter

Conditions

LM71CISD

(Limit)

±1.5

°C (max)

±2.0

°C (max)

+3/

−2

°C (max)

14

Bits

Resolution

0.03125

°C

Temperature Conversion Time

200

270

ms (max)

Quiescent Current

Serial Bus Inactive

300

550

μA (max)

(1)

(2)

(3)

Limits are ensured to AOQL (Average Outgoing Quality Level).

(4)

For best accuracy, minimize output loading. Higher sink currents can affect sensor accuracy with internal heating. This can cause an

error of 0.64°C at full rated sink current and saturation voltage based on junction-to-ambient thermal resistance.

(5)

This specification is provided only to indicate how often temperature data is updated. The LM71 can be read at any time without regard

to conversion state (and will yield last conversion result). A conversion in progress will not be interrupted. The output shift register will be

updated at the completion of the read and a new conversion restarted.

Logic Electrical Characteristics

DIGITAL DC CHARACTERISTICS

Unless otherwise noted, these specifications apply for V

Symbol

Parameter

Conditions

Units (Limit)

V (min)

Logical “1” Input Voltage

V (max)

−0.3

V (min)

Logical “0” Input Voltage

V (max)

Input Hysteresis Voltage

0.4

0.33

V (min)

Logical “1” Input Current

+

0.005

3.0

μA (max)

Logical “0” Input Current

−0.005

−3.0

μA (min)

All Digital Inputs

20

pF

High Level Output Voltage

2.4

V (min)

Low Level Output Voltage

0.4

V (max)

−1

μA (min)

TRI-STATE Output Leakage Current

+

+1

μA (max)

(1)

(2)

(3)

Limits are ensured to AOQL (Average Outgoing Quality Level).

4

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