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Industry’s Lowest-Power
Ambient Light Sensor with ADC
ELECTRICAL CHARACTERISTICS (continued)
(V CC = 1.8V, T MIN to T MAX = -40 N C to +85 N C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
I 2 C TIMING
Serial-Clock Frequency
Bus Free Time Between a STOP
and a START Condition
Hold Time (REPEATED) START
Condition
Low Period of the SCL Clock
High Period of the SCL Clock
Setup Time for a Repeated
START Condition
f SCL
t BUF
t HD,STA
t LOW
t HIGH
t SU,STA
1.3
0.6
1.3
0.6
0.6
400
kHz
F s
F s
F s
F s
F s
Data Hold Time
Data Setup Time
Fall Time of SDA Transmitting
Setup Time for STOP Condition
Pulse Width of Spike
Suppressed
t HD,DAT
t SU,DAT
t F
t SU,STO
t SP
(Note 4)
I SINK P 6mA, t R and t F are measured
between 0.3 x V DD and 0.7 x V DD
Input filters on the SDA and SCL inputs
suppress noise spikes
0
100
0.6
0
100
0.9
50
F s
ns
ns
F s
ns
Note 1: All devices are 100% production tested at T A = +25 N C. Temperature limits are guaranteed by design.
Note 2: Guaranteed by design. Green 538nm LED chosen for production so that the IC responds to 100 lux fluorescent light with
100 lux.
Note 3: With respect to green LED 538nm response.
Note 4: A master device must provide a hold time of at least 300ns for the SDA signal (referred to V IL of the SCL signal) to bridge
the undefined region of SCL’s falling edge.
3
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