MAX1619 Datasheet, PDF (4/20 Pages) Maxim Integrated Products – Remote/Local Temperature Sensor with Dual- Alarm Outputs and SMBus Serial Interface

Remote/Local Temperature Sensor with Dual-
Alarm Outputs and SMBus Serial Interface
ELECTRICAL CHARACTERISTICS (continued)
(V_CC = +3.3V, T_A = -55°C to +125°C, configuration byte = XCh, unless otherwise noted.) (Note 4)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
SMBus INTERFACE
Logic Input High Voltage
STBY, SMBCLK, SMBDATA
V_CC = 3V
2.2
V_CC = 5.5V
2.4
Logic Input Low Voltage
STBY, SMBCLK, SMBDATA; V_CC = 3V to 5.5V
Logic Output Low Sink Current
ALERT, OVERT, SMBDATA forced to 0.4V
6
V
0.8
V
mA
ALERT, OVERT Output High
Leakage Current
ALERT, OVERT forced to 5.5V
1
µA
Logic Input Current
Logic inputs forced to V_CC or GND
-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 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_R 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.
__________________________________________Typical Operating Characteristics
(T_A = +25°C, unless otherwise noted.)
20
15
10
5
0
-5
-10
-15
-20
1
TEMPERATURE ERROR
vs. PC BOARD RESISTANCE
PATH = DXP TO GND
PATH = DXP TO V_CC (5V)
10
100
LEAKAGE RESISTANCE (MΩ)
TEMPERATURE ERROR
vs. REMOTE-DIODE TEMPERATURE
2
1
ZETEX FMMT3904
0
MOTOROLA MMBT3904
-1
RANDOM
SAMPLES
-2
-50
0
50
100
150
TEMPERATURE (°C)
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
V_IN = 100mVp-p
LOCAL DIODE
6
V_IN = 100mVp-p
REMOTE DIODE
3
0
50 500 5k 50k 500k 5M 50M
FREQUENCY (Hz)
4 _______________________________________________________________________________________