Rainbow-electronics MAX1619 Manual do Utilizador descarregar pdf (Página 4)

50 5k 500k50k 5M500 50M

TEMPERATURE ERROR vs.

POWER-SUPPLY NOISE FREQUENCY

MAX1619-03

FREQUENCY (Hz)

TEMPERATURE ERROR (°C)

= SQUARE WAVE APPLIED TO

WITH NO 0.1µF V

CAPACITOR

= 250mVp-p

REMOTE DIODE

= 100mVp-p

LOCAL DIODE

= 100mVp-p

REMOTE DIODE

-20

-10

-15

-5

TEMPERATURE ERROR

vs. PC BOARD RESISTANCE

MAX1619-01

LEAKAGE RESISTANCE (MΩ)

TEMPERATURE ERROR (°C)

1 10 100

PATH = DXP TO GND

PATH = DXP TO V

(5V)

-2

-1

-50 50 1000 150

TEMPERATURE ERROR

vs. REMOTE-DIODE TEMPERATURE

MAX1619-02

TEMPERATURE (°C)

TEMPERATURE ERROR (°C)

MOTOROLA MMBT3904

ZETEX FMMT3904

RANDOM

SAMPLES

__________________________________________Typical Operating Characteristics

= +25°C, unless otherwise noted.)

MAX1619

Remote/Local Temperature Sensor with Dual-

Alarm Outputs and SMBus Serial Interface

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= +3.3V, T

= -55°C to +125°C, configuration byte = XCh, unless otherwise noted.) (Note 4)

Note 1: Guaranteed but not 100% tested.

Note 2: Quantization error is not included in specifications for temperature accuracy. For example, if the MAX1619 device tempera-

ture is exactly +66.7°C, the ADC may report +66°C, +67°C, or +68°C (due to the quantization error plus the +1/2°C offset

used for rounding up) and still be within the guaranteed ±1°C error limits for the +60°C to +100°C temperature range

(Table 2).

Note 3: A remote diode is any diode-connected transistor from Table 1. T

is the junction temperature of the remote diode. See

Remote Diode Selection

for remote diode forward voltage requirements.

Note 4: Specifications from -55°C to +125°C are guaranteed by design, not production tested.

Note 5: The SMBus logic block is a static design that works with clock frequencies down to DC. While slow operation is possible, it

violates the 10kHz minimum clock frequency and SMBus specifications, and may monopolize the bus.

Note 6: Note that a transition must internally provide at least a hold time in order to bridge the undefined region (300ns max) of

SMBCLK’s falling edge.

CONDITIONS UNITSMIN TYP MAXPARAMETER

STBY, SMBCLK, SMBDATA

2.2

Logic Input High Voltage V

2.4

STBY, SMBCLK, SMBDATA; V

= 3V to 5.5V

V0.8Logic Input Low Voltage

ALERT, OVERT forced to 5.5V

µA1

ALERT, OVERT Output High

Leakage Current

Logic inputs forced to V

or GND µA-2 2Logic Input Current

= 3V

= 5.5V

ALERT, OVERT, SMBDATA forced to 0.4V

mA6Logic Output Low Sink Current

SMBus INTERFACE

1 2 3 4 5 6 7 8 9 ... 19 20

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