Rainbow-electronics MAX1989 Bedienungsanleitung PDF herunterladen (Seite 4)

MAX1668/1805 toc03

FREQUENCY (MHz)

TEMPERATURE ERROR (°C)

TEMPERATURE ERROR

vs. SUPPLY NOISE FREQUENCY

100mV

P-P

0.1 1 10 100

WITH V

0.1µF CAPACITOR REMOVED

2200pF BETWEEN DXN_ AND DXP_

250mV

P-P

-20

1 10 100

TEMPERATURE ERROR

vs. PC BOARD RESISTANCE

-10

MAX1668/1805 toc01

LEAKAGE RESISTANCE (MΩ)

TEMPERATURE ERROR (°C)

PATH = DXP_ TO GND

PATH = DXP_ TO V

(5V)

-2

-1

-50 -10-30 10 30 50 70 90 110

TEMPERATURE ERROR

vs. TEMPERATURE

MAX1668/1805 toc02

TEMPERATURE (°C)

TEMPERATURE ERROR (°C)

NPN (CMPT3904)

PNP (CMPT3906)

INTERNAL

Typical Operating Characteristics

(Typical Operating Circuit, V

= +5V, STBY = V

, configuration byte = X0XXXX00, T

= +25°C, unless otherwise noted.)

MAX1668/MAX1805/MAX1989

†

Multichannel Remote/Local

Temperature Sensors

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= +5V, STBY = V

, configuration byte = X0XXXX00, T

= -55°C to +125°C, unless otherwise noted.) (Note 6)

Note 1: Guaranteed by design, but not production tested.

Note 2: Quantization error is not included in specifications for temperature accuracy. For example, if the MAX1668/MAX1805/

MAX1989 device temperature is exactly +66.7°C, the ADC may report +66°C, +67°C, or +68°C (due to the quantization

error plus the +0.5°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. See 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 the

Remote-Diode Selection section for remote-diode forward-voltage requirements.

Note 4: 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 can monopolize the bus.

Note 5: 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 t

HD:DAT.

Note 6: Specifications from -55°C to +125°C are guaranteed by design, not production tested.

CONDITIONS UNITSMIN TYP MAXPARAMETER

STBY, SMBCLK, SMBDATA; V

= 4.5V to 5.5V

Logic Input High Voltage V2.4

ALERT forced to 5.5V

µA1

ALERT Output High Leakage

Current

Logic inputs forced to V

or GND µA-2 +2Logic Input Current

ALERT, SMBDATA forced to 0.4V

mA6Logic Output Low Sink Current

STBY, SMBCLK, SMBDATA; V

= 4.5V to 5.5V

V0.8Logic Input Low Voltage

SMBus INTERFACE

1 2 3 4 5 6 7 8 9 ... 15 16

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