Datasheet

DS1859
Dual, Temperature-Controlled Resistors with
Internally Calibrated Monitors
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PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Thermometer Error T
ERR
-40°C to +95°C
±3.0
°C
DIGITAL THERMOMETER
(V
CC
= 2.85V to 5.5V, T
A
= -40°C to +95°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
EEPROM Writes +70°C
50,000
NONVOLATILE MEMORY CHARACTERISTICS
(V
CC
= 2.85V to 5.5V)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Input Resolution
∆VMON 610
µV
Supply Resolution ∆V
CC
1.6 mV
Input/Supply Accuracy
(MON1, MON2, MON3, V
CC
)
A
CC
At factory setting
0.25 0.5
% FS
(full scale)
Update Rate for MON1, MON2,
MON3, Temp, or V
CC
t
frame
30 45 ms
Input/Supply Offset
(MON1, MON2, MON3, V
CC
)
V
OS
(Note 14) 0 5 LSB
ANALOG VOLTAGE MONITORING
(V
CC
= 2.85V to 5.5V, T
A
= -40°C to +95°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Position 00h Resistance (50kΩ)T
A
= +25°C
0.65
1.0
1.35
kΩ
Position FFh Resistance (50kΩ)T
A
= +25°C 40 50 60 kΩ
Position 00h Resistance (20kΩ)T
A
= +25°C
0.20 0.40 0.55
kΩ
Position FFh Resistance (20kΩ)T
A
= +25°C 16 20 24 kΩ
Absolute Linearity (Note 6) -2 +2 LSB
Relative Linearity (Note 7) -1 +1 LSB
Temperature Coefficient (Note 8) 50
ppm/°C
ANALOG RESISTOR CHARACTERISTICS
(V
CC
= 2.85V to 5.5V, T
A
= -40°C to +95°C, unless otherwise noted.)