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TSL2560 Datasheet Preview

TSL2560 Datasheet

LIGHT TO DIGITAL CONVERTER

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r
r
D Approximates Human Eye Response
D Programmable Interrupt Function with
User-Defined Upper and Lower Threshold
Settings
D 16-Bit Digital Output with SMBus (TSL2560)
at 100 kHz or I2C (TSL2561) Fast-Mode at
400 kHz
D Programmable Analog Gain and Integration
Time Supporting 1,000,000-to-1 Dynamic
Range
D Automatically Rejects 50/60-Hz Lighting
Ripple
D Low Active Power (0.75 mW Typical) with
Power Down Mode
D RoHS Compliant
TSL2560, TSL2561
LIGHT-TO-DIGITAL CONVERTER
TAOS059N − MARCH 2009
PACKAGE CS
6-LEAD CHIPSCALE
(TOP VIEW)
VDD 1
ADDR SEL 2
GND 3
6 SDA
5 INT
4 SCL
VDD 1
ADDR SEL 2
GND 3
PACKAGE T
6-LEAD TMB
(TOP VIEW)
6 SDA
5 INT
4 SCL
Description
The TSL2560 and TSL2561 are light-to-digital
converters that transform light intensity to a digital
signal output capable of direct I2C (TSL2561) or
SMBus (TSL2560) interface. Each device com-
bines one broadband photodiode (visible plus
infrared) and one infrared-responding photodiode
on a single CMOS integrated circuit capable of
providing a near-photopic response over an
effective 20-bit dynamic range (16-bit resolution).
Two integrating ADCs convert the photodiode
currents to a digital output that represents the
irradiance measured on each channel. This digital
output can be input to a microprocessor where
illuminance (ambient light level) in lux is derived
using an empirical formula to approximate the
human eye response. The TSL2560 device
permits an SMB-Alert style interrupt, and the
TSL2561 device supports a traditional level style
interrupt that remains asserted until the firmware
clears it.
PACKAGE FN
DUAL FLAT NO-LEAD
(TOP VIEW)
VDD 1
ADDR SEL 2
GND 3
6 SDA
5 INT
4 SCL
SDA 5
PACKAGE CL
6-LEAD ChipLED
(TOP VIEW)
4 SCL
INT 6
3 ADDR SEL
VDD 1
2 GND
Package Drawings are Not to Scale
While useful for general purpose light sensing applications, the TSL2560/61 devices are designed particularly
for display panels (LCD, OLED, etc.) with the purpose of extending battery life and providing optimum viewing
in diverse lighting conditions. Display panel backlighting, which can account for up to 30 to 40 percent of total
platform power, can be automatically managed. Both devices are also ideal for controlling keyboard illumination
based upon ambient lighting conditions. Illuminance information can further be used to manage exposure
control in digital cameras. The TSL2560/61 devices are ideal in notebook/tablet PCs, LCD monitors, flat-panel
televisions, cell phones, and digital cameras. In addition, other applications include street light control, security
lighting, sunlight harvesting, machine vision, and automotive instrumentation clusters.
The LUMENOLOGY r Company
r
Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road S Suite 300 S Plano, TX 75074 S (972r) 673-0759
www.taosinc.com
Copyright E 2009, TAOS Inc.
1




TAOS

TSL2560 Datasheet Preview

TSL2560 Datasheet

LIGHT TO DIGITAL CONVERTER

No Preview Available !

TSL2560, TSL2561
LIGHT-TO-DIGITAL CONVERTER
TAOS059N − MARCH 2009
Functional Block Diagram
VDD = 2.7 V to 3.5 V
ADDR SEL
Channel 0
Visible and IR
Channel 1
IR Only
Integrating
A/D Converter
Address Select
Command
Register
ADC
Register
Two-Wire Serial Interface
Interrupt
INT
SCL
SDA
Detailed Description
The TSL2560 and TSL2561 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.
Available Options
DEVICE
TSL2560
TSL2560
TSL2560
TSL2560
TSL2561
TSL2561
TSL2561
TSL2561
INTERFACE
SMBus
SMBus
SMBus
SMBus
I2C
I2C
I2C
I2C
PACKAGE − LEADS
Chipscale
TMB-6
Dual Flat No-Lead − 6
ChipLED-6
Chipscale
TMB-6
Dual Flat No-Lead − 6
ChipLED-6
PACKAGE DESIGNATOR
CS
T
FN
CL
CS
T
FN
CL
ORDERING NUMBER
TSL2560CS
TSL2560T
TSL2560FN
TSL2560CL
TSL2561CS
TSL2561T
TSL2561FN
TSL2561CL
Copyright E 2009, TAOS Inc.
2
r
www.taosinc.com
The LUMENOLOGY r Company
r


Part Number TSL2560
Description LIGHT TO DIGITAL CONVERTER
Maker TAOS
Total Page 30 Pages
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