MAX1668(2000) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX1668 Datasheet PDF : 16 Pages
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Multichannel Remote/Local
Temperature Sensor
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5V, STBY = VCC, configuration byte = X0XXXX00, TA = -55°C to +125°C, unless otherwise noted.) (Note 6)
PARAMETER
CONDITIONS
MIN TYP MAX
SMBus INTERFACE
UNITS
Logic Input High Voltage
STBY, SMBCLK, SMBDATA
VCC = 4.5V to 5.5V
2.4
Logic Input Low Voltage
STBY, SMBCLK, SMBDATA; VCC = 4.5V to 5.5V
Logic Output Low Sink Current
ALERT, SMBDATA forced to 0.4V
6
ALERT Output High Leakage
Current
ALERT forced to 5.5V
V
0.8
V
mA
1
µA
Logic Input Current
Logic inputs forced to VCC or GND
-2
2
µA
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
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
+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 tempera-
ture range. See Table 2.
Note 3: A remote diode is any diode-connected transistor from Table 1. TR is the junction temperature of the remote diode. See
Remote Diode Selection 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 may 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 tHD:DAT.
Note 6: Specifications from -55°C to +125°C are guaranteed by design, not production tested.
__________________________________________Typical Operating Characteristics
(Typical Operating Circuit, VCC = +5V, STBY = VCC, configuration byte = X0XXXX00, TA = +25°C, unless otherwise noted.)
TEMPERATURE ERROR
vs. PC BOARD RESISTANCE
20
10
PATH = DXP_ TO GND
0
TEMPERATURE ERROR
vs. TEMPERATURE
4
3
NPN (CMPT3904)
2
PNP (CMPT3906)
1
TEMPERATURE ERROR
vs. SUPPLY NOISE FREQUENCY
24
WITH VCC 0.1µF CAPACITOR REMOVED
2200pF BETWEEN DXN_ AND DXP_
20
250mVp-p
16
12
0
-10
PATH = DXP_ TO VCC (5V)
-1
INTERNAL
8
100mVp-p
4
-20
1
10
100
LEAKAGE RESISTANCE (MΩ)
-2
-50 -30 -10 10 30 50 70 90 110
TEMPERATURE (°C)
0
0.1
1
10
100
FREQUENCY (MHz)
4 _______________________________________________________________________________________
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