TCS3400 Datasheet, PDF (24/35 Pages) ams AG – Single Device Integrated Optical Solution

TCS3400 − Power SupplyConsiderations
Power Supply Considerations
Figure 34:
Typical Application Hardware Circuit
Place a 1-μF low-ESR decoupling capacitor as close as possible
to the V_DD pin.
Voltage
Regulator
Cap sized
1 µF
per
regulator
specs
V_BUS
V_DD
GND ^{TCS3400 INT}
SCL
I/C
SDA
R_P
R_P
R_PI
V_BUS in the above figures refers to the I²C bus voltage which is
either V_DD or 1.8 V. Be sure to apply the specified I²C bus voltage
shown in the Ordering & Contact Information for the specific
device being used.
The I²C signals and the Interrupt are open-drain outputs and
require pull−up resistors. The pull-up resistor (RP) value is a
function of the I²C bus speed, the I²C bus voltage, and the
capacitive load. The ams EVM running at 400 kbps, uses 1.5-kΩ
resistors. A 10-kΩ pull-up resistor (RPI) can be used for the
interrupt line.
Page 24
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[v1-01] 2016-Apr-13