MAX1617A Datasheet, PDF (4/18 Pages) Maxim Integrated Products – Remote/Local Temperature Sensor with SMBus Serial Interface

Remote/Local Temperature Sensor
with SMBus Serial Interface
ELECTRICAL CHARACTERISTICS (continued)
(V_CC = +3.3V, T_A = -55°C to +125°C, unless otherwise noted.) (Note 6)
PARAMETER
CONDITIONS
SMBus INTERFACE
Logic Input High Voltage
Logic Input Low Voltage
Logic Output Low Sink Current
STBY, SMBCLK, SMBDATA
V_CC = 3V
V_CC = 5.5V
STBY, SMBCLK, SMBDATA; V_CC = 3V to 5.5V
ALERT, SMBDATA forced to 0.4V
ALERT Output High Leakage
Current
ALERT forced to 5.5V
Logic Input Current
Logic inputs forced to V_CC or GND
MIN TYP MAX UNITS
2.2
V
2.4
0.8
V
6
mA
1
µA
-2
2
µA
Note 1: Guaranteed but not 100% tested.
Note 2: Quantization error is not included in specifications for temperature accuracy. For example, if the MAX1617A device temper-
ature 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_R 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.
Note 6: Specifications from -55°C to +125°C are guaranteed by design, not production tested.
__________________________________________Typical Operating Characteristics
(T_A = +25°C, unless otherwise noted.)
TEMPERATURE ERROR
vs. PC BOARD RESISTANCE
20
10
PATH = DXP TO GND
TEMPERATURE ERROR
vs. REMOTE-DIODE TEMPERATURE
2
1
ZETEX FMMT3904
TEMPERATURE ERROR vs.
POWER-SUPPLY NOISE FREQUENCY
12
V_IN = SQUARE WAVE APPLIED TO
V_CC WITH NO 0.1µF V_CC CAPACITOR
9
V_IN = 250mVp-p
REMOTE DIODE
0
-10
-20
1
PATH = DXP TO V_CC (5V)
3
10
30
100
LEAKAGE RESISTANCE (MΩ)
0
MOTOROLA MMBT3904
SAMSUNG KST3904
-1
RANDOM
SAMPLES
-2
-50
0
50
100
150
TEMPERATURE (°C)
6
V_IN = 250mVp-p
LOCAL DIODE
3
V_IN = 100mVp-p
REMOTE DIODE
0
50 500 5k 50k 500k 5M 50M
FREQUENCY (Hz)
4 _______________________________________________________________________________________