Datasheet

DS1805
Addressable Digital Potentiometer
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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 Resistor Tolerance (Note 6)
-20 +20
%
Absolute Linearity (Note 7)
-0.75 +0.75
LSB
Relative Linearity (Note 8)
-0.3 +0.3
LSB
-3dB Cutoff Frequency
f
CUTOFF
(Note 9) Hz
Ratiometric Temperature Coefficient 8
ppm/°C
End-to-End Temperature Coefficient
550
ppm/°C
Capacitance
C
I
5pF
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 0 400
SCL Clock Frequency (Note 10) f
SCL
Standard mode 0 100
kHz
Fast mode 1.3
Bus Free Time Between STOP
and START Condition (Note 10)
t
BUF
Standard mode 4.7
µs
Fast mode 0.6
Hold Time (Repeated) START
Condition (Notes 10, 11)
t
HD:STA
Standard mode 4.0
µs
Fast mode 1.3
Low Period of SCL Clock
(Note 10)
t
LOW
Standard mode 4.7
µs
Fast mode 0.6
High Period of SCL Clock
(Note 10)
t
HIGH
Standard mode 4.0
µs
Fast mode 0 0.9
Data Hold Time
(Notes 10, 12, 13)
t
HD:DAT
Standard mode 0 0.9
µs
Fast mode 100
Data Setup Time
(Note 10)
t
SU:DAT
Standard mode 250
ns
Fast mode
20 + 0.1C
B
300
Rise Time of Both SDA and SCL
Signals (Notes 10, 14)
t
R
Standard mode
20 + 0.1C
B
1000
ns
Fast mode
20 + 0.1C
B
300
Fall Time of Both SDA and SCL
Signals (Notes 10, 14)
t
F
Standard mode
20 + 0.1C
B
300
ns
Fast mode 0.6
Setup Time for STOP Condition
(Note 10)
t
SU:STO
Standard mode 4.0
µs
Capacitive Load for Each Bus
Line (Note 14)
C
B
400 pF