Rainbow Electronics DS3903 - Manual (Page 3)

DS3903
Triple 128-Position Nonvolatile
Digital Potentiometer
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AC ELECTRICAL CHARACTERISTICS
(V CC = 2.7V to 5.5V, T A = -40°C to +85°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Fast mode (Note 4) 0 400
SCL Clock Frequency f
SCL
Standard mode (Note 4) 0 100
kHz
Fast mode (Note 4) 1.3 Bus Free Time Between Stop and
Start Conditions
t BUF
Standard mode (Note 4) 4.7
µs
Fast mode (Notes 4, 5) 0.6 Hold Time (Repeated) Start
Condition
t HD:STA
Standard mode (Notes 4, 5) 4.0
µs
Fast mode (Note 4) 1.3
Low Period of SCL Clock t LOW
Standard mode (Note 4) 4.7
µs
Fast mode (Note 4) 0.6
High Period of SCL Clock t
HIGH
Standard mode (Note 4) 4.0
µs
Fast mode (Notes 4, 6, 7) 0 0.9
Data Hold Time t HD:DAT
Standard mode (Notes 4, 6, 7) 0 0.9
µs
Fast mode (Note 4) 100
Data Set-Up Time t SU:DAT
Standard mode (Note 4) 250
ns
Fast mode 0.6
Start Set-Up Time t SU:STA
Standard mode 4.7
µs
Fast mode (Note 8) 20 + 0.1C B 300 Rise Time of Both SDA and SCL
Signals
t
R
Standard mode (Note 8) 20 + 0.1C B 1000
ns
Fast mode (Note 8) 20 + 0.1C B 300 Fall Time of Both SDA and SCL
Signals
t F
Standard mode (Note 8) 20 + 0.1C B 300
ns
Fast mode 0.6
Set-Up Time for Stop Condition t SU:STO
Standard mode 4.7
µs
Capacitive Load for Each Bus C B (Note 8) 400 pF
EEPROM Write Time t W (Note 9) 10 ms
Startup Time t ST 2 ms
ANALOG RESISTOR CHARACTERISTICS
(V CC = 2.7V to 5.5V, T A = -40°C to +85°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
End-to-End Resistance Tolerance +25°C -20 +20 %
10k Ω Pot 10.5
End-to-End Resistance
90k Ω Pot 90
k Ω
Factory-Default Wiper Setting Position 127 (max resistance)
Wiper Resistance R W 250 500 Ω
Absolute Linearity (Note 10) -1.0 +1.0 LSB
Relative Linearity (Note 11) -0.25 +0.25 LSB
End-to-End
Temperature Coefficient
-300 0 +300 ppm/°C
Ratiometric
Temperature Coefficient
±30 ppm/°C