TSL25717 查看數據表（PDF） - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

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TSL25717

LIGHT-TO-DIGITAL CONVERTER

TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS 

TSL2571

LIGHT-TO-DIGITAL CONVERTER

APPLICATION INFORMATION: HARDWARE

TAOS117A − FEBRUARY 2011

Typical Hardware Application

A typical hardware application circuit is shown in Figure 10. A 1-μF low-ESR decoupling capacitor should be

placed as close as possible to the VDD pin.

VDD

VBUS

1 mF

VDD

RP

RP

RPI

TSL2571 INT

GND

SCL

SDA

Figure 10. Typical Application Hardware Circuit

VBUS in Figure 10 refers to the I2C bus voltage, which is either VDD or 1.8 V. Be sure to apply the specified I2C

bus voltage shown in the Available Options table 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 TAOS EVM running

at 400 kbps, uses 1.5-kΩ resistors. A 10-kΩ pull-up resistor (RPI) can be used for the interrupt line.

PCB Pad Layout

Suggested PCB pad layout guidelines for the Dual Flat No-Lead (FN) surface mount package are shown in

Figure 11.

Note: Pads can be

extended further if hand

soldering is needed.

650

650

1000

2500

1000

400

1700

400

NOTES: A. All linear dimensions are in micrometers.

B. This drawing is subject to change without notice.

Figure 11. Suggested FN Package PCB Layout

The LUMENOLOGY r Company

r

r

www.taosinc.com

Copyright E 2011, TAOS Inc.

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