Rainbow Electronics MAX6649 - Manual (Page 2)

MAX6646/MAX6647/MAX6649
+145°C Precision SMBus-Compatible Remote/
Local Sensors with Overtemperature Alarms
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
All Voltages Referenced to GND
V
CC ...........................................................................-0.3V to +6V
DXP.............................................................-0.3V to (V
CC
+ 0.3V)
DXN .......................................................................-0.3V to +0.8V
SCLK, SDA, ALERT, OVERT.....................................-0.3V to +6V
SDA, ALERT, OVERT Current .............................-1mA to +50mA
DXN Current .......................................................................±1mA
Continuous Power Dissipation (T
A = +70°C)
8-Pin µMAX (derate 5.9mW/°C above +70°C) .............471mW
ESD Protection (all pins, Human Body Model) ................±2000V
Junction Temperature ......................................................+150°C
Operating Temperature Range .........................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
CC
= 3.0V to 5.5V, T
A
= -55°C to +125°C, unless otherwise specified. Typical values are at V
CC
= 3.3V and T
A
= +100°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V CC 3.0 5.5 V
0.125 °C
Temperature Resolution
11 Bits
V CC = 3.3V, T A = +100°C,
T RJ = +60°C to +145°C
-1.0 +1.0
V CC = 3.3V, T A = +60°C to +100°C,
T RJ = +25°C to +145°C
-1.6 +1.6 Remote Temperature Error
V CC = 3.3V, T A = +0°C to +100°C,
T RJ = +0°C to +145°C
-3.2 +3.2
°C
T A = +60°C to +100°C -2.0 +2.0
Local Temperature Error V CC = 3.3V
T A = 0°C to +125°C -3.0 +3.0
°C
Supply Sensitivity of Temperature
Error
±0.2 °C/V
Undervoltage Lockout (UVLO)
Threshold
UVLO Falling edge of V CC disables ADC 2.4 2.7 2.95 V
UVLO Hysteresis 90 mV
Power-On-Reset (POR) Threshold V CC falling edge 2.0 V
POR Threshold Hysteresis 90 mV
Standby Supply Current SMBus static 3 12 µA
Operating Current During conversion 0.08 mA
0.25 conversions per second 40 80
Average Operating Current
2 conversions per second 250 400
µA
Conversion Time t CONV From stop bit to conversion completion 95 125 156 ms
Conversion Time Error -25 +25 %
DXP and DXN Leakage Current Standby mode 100 nA
High level 80 100 120
Remote-Diode Source Current I RJ
Low level 8 10 12
µA