Rainbow Electronics DS1857 - Manual (Page 3)

DS1857
Dual Temperature-Controlled Resistors with
External Temperature Input and Monitors
_____________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
EXTTMP Input Voltage V EXTTMP 1.779 V
Conversion Resolution ∆V
EXTTMP 625 µV
Conversion Accuracy V EXTTMP (Note 9) 12.8 mV
EXTERNAL TEMPERATURE
(V
CC
= 3.0V to 5.5V, T
A
= -40°C to +95°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Resolution ∆VMON 610 µV
Supply Resolution ∆V
CC 1.6 mV
Input/Supply Accuracy A CC 0.25 0.5
% FS
(full scale)
Update Rate for MON1, MON2,
Temp, or V
CC
t frame 20 30 ms
ANALOG VOLTAGE MONITORING
(V CC = 3.0V to 5.5V, T A = -40°C to +95°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Position 00h Resistance T A = +25°C 0.70 1.0 1.25 k Ω
Position FFh Resistance T
A
= +25°C 40 50 60 k Ω
Absolute Linearity (Note 6) -2 +2 LSB
Relative Linearity (Note 7) -1 +1 LSB
Temperature Coefficient (Note 8) 50 ppm/°C
High-Z Resistor Current I RHIZ R HIZ = V CC 0.1 µA
ANALOG RESISTOR CHARACTERISTICS
(V CC = 3.0V to 5.5V, T A = -40°C to +95°C, unless otherwise noted.)