Datasheet

Dual, Temperature-Controlled Resistors with Inter-
nally Calibrated Monitors and Password Protection
Maxim Integrated 3
DS1856
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 (Note 14)
50,000
Writes
NONVOLATILE MEMORY CHARACTERISTICS
(V
CC
= 2.85V to 5.5V)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Input Resolution
ΔVMON 610
µV
Supply Resolution ΔV
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
47 60 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 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 (30kΩ)T
A
= +25°C
0.165 0.275 0.400
kΩ
Position FFh Resistance (30kΩ)T
A
= +25°C
22.5
30
37.5
kΩ
Position 00h Resistance (20kΩ)T
A
= +25°C
0.20 0.40 0.55
kΩ
Position FFh Resistance (20kΩ)T
A
= +25°C
15
20 25 kΩ
Position 00h Resistance (10kΩ)T
A
= +25°C
0.075 0.125 0.200
kΩ
Position FFh Resistance (10kΩ)T
A
= +25°C
7.5
10
12.5
kΩ
Position 00h Resistance (2.5kΩ)T
A
= +25°C
0.1 0.175 0.250
kΩ
Position FFh Resistance (2.5kΩ)T
A
= +25°C
2.0 2.50 3.0
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.)