ISL29038 Datasheet, PDF (5/15 Pages) Xicor Inc. – Low Power Ambient Light and Proximity Sensor with Enhanced Infrared Rejection

ISL29038
I²C Electrical Specifications
For SCL and SDA unless otherwise noted, V_DD = 3V, T_A = +25°C, R_EXT = 499kΩ 1% tolerance (Note 10). (Continued)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP MAX
t_R
Rise Time of both SDA and SCL Signals
(Note 11)
20 + 0.1xC_b
t_F
Fall Time of both SDA and SCL Signals
(Note 11)
20 + 0.1xC_b
t_SU:STO Set-up Time for STOP Condition
600
t_BUF
Bus Free Time Between a STOP and START Condition
1300
C_b
Capacitive Load for Each Bus Line
400
R_pull-up SDA and SCL System Bus Pull-Up Resistor
Maximum determined by t_R and t_F
1
t_VD;DAT Data Valid Time
0.9
t_VD:ACK Data Valid Acknowledge Time
0.9
V_nL
Noise Margin at the LOW Level
0.1VDD
V_nH
Noise Margin at the HIGH Level
0.2VDD
NOTES:
7. Cover glass assumes fixed infrared/visible light transmissivity ratio of 10.
8. The LED light source irradiance is calibrated to produce the same ALS count as a fluorescent light source of the same Lux level.
9. An 850nm infrared LED is used in production test for proximity/IR sensitivity testing.
10. All parameters in I²C Electrical Specifications table are guaranteed by design and simulation.
11. C_b is the capacitance of the bus in pF.
UNITS
ns
ns
ns
ns
pF
kΩ
µs
µs
V
V
FIGURE 4. I²C TIMING DIAGRAM
5
FN7851.0
October 12, 2012