TSL2561 datasheet(5/37 Pages) OSRAM

5 / 37 page

Page 4

ams Datasheet

Document Feedback

[v1-01] 2018-Apr-23

TSL2561 − Detailed Description

The TSL2561 is a second-generation ambient light sensor

device. It 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 I²C serial bus. Consequently, the TSL2561

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 TSL2561 device is digital, the output is effectively

immune to noise when compared to an analog signal.

The TSL2561 device also supports 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 TSL2561

device has 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

TSL2561 データシート(PDF) 5 Page - OSRAM GmbH