TSL2568CS datasheet(5/56 Pages) OSRAM

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[v1-00] 2016-Apr-12

TSL2568, TSL2569 − Detailed Description

The TSL2568 and TSL2569 are second-generation ambient light

sensor devices. Each contains two integrating analog-to-digital

converters (ADC) that integrate currents from two photodiodes.

Integration of both channels occurs simultaneously. Upon

completion of the conversion cycle, the conversion result is

transferred to the Channel 0 and Channel 1 data registers,

respectively. The transfers are double-buffered to ensure that

the integrity of the data is maintained. After the transfer, the

device automatically begins the next integration cycle.

Communication to the device is accomplished through a

standard, two-wire SMBus or I²C serial bus. Consequently, the

TSL256x device can be easily connected to a microcontroller or

embedded controller. No external circuitry is required for signal

conditioning, thereby saving PCB real estate as well. Since the

output of the TSL256x device is digital, the output is effectively

immune to noise when compared to an analog signal.

The TSL256x devices also support an interrupt feature that

simplifies and improves system efficiency by eliminating the

need to poll a sensor for a light intensity value. The primary

purpose of the interrupt function is to detect a meaningful

change in light intensity. The concept of a meaningful change

can be defined by the user both in terms of light intensity and

time, or persistence, of that change in intensity. The TSL256x

devices have the ability to define a threshold above and below

the current light level. An interrupt is generated when the value

of a conversion exceeds either of these limits.

Detailed Description

TSL2568CS 数据表(PDF) 5 Page - OSRAM GmbH