Datasheet

DS1844
8 of 14
ANALOG RESISTOR CHARACTERISTICS (-40°C to +85°C; V
CC
=2.7V to 5.5V)
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTES
End-to-End Resistor
Tolerance
-20 +20 % 25
Absolute Linearity -0.5 +0.5 LSB 16
Relative Linearity -0.25 +0.25 LSB 17
-3dB Cutoff frequency f
cutoff
kHz 13
Temperature Coefficent 750 ppm/°C 18
2-WIRE ADDRESSABLE INTERFACE
AC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; V
CC
=2.7V to 5.5V)
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTES
Port Select Setup t
SETUP
30 ns 20,22
SCL Clock Frequency f
SCL
0
0
400
100
kHz *,8
**,22
Bus Free Time Between
STOP and START Condition
t
BUF
1.3
4.7
µs *,8
**,22
Hold Time (repeated)
START Condition
t
HD:STA
0.6
4.0
µs *,5,8
**,22
Low Period of SCL Clock t
LOW
1.3
4.7
µs *,8
**,22
High Period of SCL Clock t
HIGH
0.6
4.0
µs *,8
**,22
Data Hold Time t
HD:DAT
0
0
0.9 µs *,6,7,
**,22
Data Setup Time t
SU:DAT
100
250
ns *,8
**,22
Rise Time of Both SDA and
SCL Signals
t
R
20+0.1C
B
300
1000
ns *,9
**,22
Fall Time of Both SDA and
SCL Signals
t
F
20+0.1C
B
300
300
ns *,9
**,22
Setup Time for STOP
Condition
t
SU:STO
0.6
4.0
µs *,
**,22
Capacitive Load for each
Bus Line
C
B
400 pF 9
* fast mode
** standard mode