TSL2580 datasheet(39/53 Pages) OSRAM

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ams Datasheet

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[v1-00] 2016-Apr-05

TSL2580, TSL2581 − Application Information: Hardware

Power Supply Decoupling and Application

Hardware Circuit

The power supply lines must be decoupled with a 0.1

μF

capacitor placed as close to the device package as possible

(Figure 40). The bypass capacitor should have low effective

series resistance (ESR) and low effective series inductance (ESI),

such as the common ceramic types, which provide a low

impedance path to ground at high frequencies to handle

transient currents caused by internal logic switching.

Figure 40:

Bus Pull-Up Resistors

Pull-up resistors (Rp) maintain the SDAH and SCLH lines at a

high level when the bus is free and ensure the signals are pulled

up from a low to a high level within the required rise time. For

a complete description of the SMBus maximum and minimum

Rp values, please review the SMBus Specification at:

http://www.smbus.org/specs.

For a complete description of I²C maximum and minimum Rp

values, please review the I²C Specification at:

www.nxp.com

A pull-up resistor (RPI) is also required for the interrupt (INT),

which functions as a wired-AND signal in a similar fashion to

the SCL and SDA lines. A typical impedance value between

10 k

Ω and 100 kΩ can be used. Please note that while Figure 40

shows INT being pulled up to VDD, the interrupt can optionally

be pulled up to VBUS.

Application Information:

Hardware

TSL2580/

TSL2581

VBUS

VDD

0.1

SCL

SDA

RPI

INT

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