Rainbow-electronics LM40 Bedienungsanleitung PDF herunterladen (Seite 5)

TEMPERATURE-TO-DIGITAL CONVERTER CHARACTERISTICS

Parameter Conditions

Typical

(Note 7)

Limits

(Note 8)

Units

(Limits)

Diode Source Current

D+

−V

D−

) = +0.65 V; High Current 188 280 µA (max)

Low Current 11.75 µA

Diode Source Current High Current to Low Current

Ratio

ANALOG TO DIGITAL CONVERTER CHARACTERISTICS

Symbol Parameter Conditions Typical

(Note 7)

Limits

(Note 8)

Units

(Limit)

TUE Total Unadjusted Error(Note 11)

2 %FS

(max)

Resolution 9 Bits

DNL Differential Non-linearity 1 LSB

Power Supply Sensitivity

1 %/V

Input Resistance, all analog inputs (total resistance

of divider chain)

210 140 kΩ (min)

400 kΩ (max)

SWD and ADD DIGITAL INPUT CHARACTERISTICS

Symbol Parameter Conditions

Typical

(Note 7)

Limits

(Note 8)

Units

(Limit)

SWD Logical High Input Voltage 2.1 V (min)

V+ + 0.5 V (max)

SWD Logical Low Input Voltage 0.8 V (max)

-0.5 V (min)

ADD Logical High Input Voltage 90%xV+ V (min)

ADD Logical Low Input Voltage 10%xV+ V (max)

HYST

Input Hysteresis 300 mV

SWD and ADD Input Current GND ≤ V

≤ V+

0.005

10 µA (max)

SWD Input Current with V+ Open or

Grounded

GND ≤ V

≤ 3.6V,

and V+ Open or

GND

0.005 µA

Digital Input Capacitance 10 pF

SWD DIGITAL OUTPUT CHARACTERISTICS

Symbol Parameter Conditions

Typical

(Note 7)

Limits

(Note 8)

Units

(Limit)

Open-drain Output Logic “Low”

Voltage

= 4mA 0.4 V (max)

= 50µA 0.2 V (max)

Open-drain Output Off Current

0.005

10 µA (max)

OUT

Digital Output Capacitance 10 pF

AC Electrical Characteristics

The following specification apply for V+ = +3.0 V

to +3.6 V

, unless otherwise specified. Boldface limits apply for

MIN

=0˚C to T

MAX

=85˚C; all other limits T

= 25˚C. The SensorPath Characteristics conform to the SensorPath

specification revision 0.98. Please refer to that speciation for further details.

Symbol Parameter Conditions

Typical

(Note 7)

Limits

(Note 8)

Units

(Limits)

HARDWARE MONITOR CHARACTERISTICS

CONV

Total Monitoring Cycle Time (Note 13) All Voltage and

Temperature readings

(Default)

182 163.8 ms (min)

200.2 ms (max)

SensorPath Bus CHARACTERISTICS

SWD fall time (Note 16) R

pull-up

=1.25 kΩ

30%,

=400 pF

300 ns (max)

LM40

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