TSL2561 datasheet(14/37 Pages) OSRAM

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ams Datasheet

Page 13

[v1-01] 2018-Apr-23

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TSL2561 − Principles of Operation

Analog-to-Digital Converter

The TSL2561 contains two integrating analog-to-digital

converters (ADC) that integrate the currents from the channel 0

and channel 1 photodiodes. Integration of both channels

occurs simultaneously, and 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 invalid data is not read during the

transfer. After the transfer, the device automatically begins the

next integration cycle.

Digital Interface

Interface and control of the TSL2561 is accomplished through

a two-wire serial interface to a set of registers that provide

access to device control functions and output data. The serial

interface is compatible with I²C bus Fast-Mode. The TSL2561

offers three slave addresses that are selectable via an external

pin (ADDR SEL). The slave address options are shown in

Figure 13.

Figure 13:

Slave Address Selection

Note(s):

1. The Slave Addresses are 7 bits. A read/write bit should be appended to the

slave address by the master device to properly communicate with the

TSL2561 device.

ADDR SEL

Terminal Level

Slave Address

GND

0101001

Float

0111001

VDD

1001001

Principles of Operation

TSL2561 Datasheet(PDF) 14 Page - OSRAM GmbH