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TSL2561T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42
TSL2560, TSL2561
LIGHT-TO-DIGITAL CONVERTER
TAOS059N − MARCH 2009
1
The LUMENOLOGY r Company
r
r
Copyright E 2009, TAOS Inc.
www.taosinc.com
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 I
2
C (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
Description
The TSL2560 and TSL2561 are light-to-digital
converters that transform light intensity to a digital
signal output capable of direct I
2
C (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.
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.
r
r
Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road S Suite 300 S Plano, TX 75074 S (972) 673-0759
6 SDA
5 INT
4 SCL
PACKAGE T
6-LEAD TMB
(TOP VIEW)
V
DD
1
ADDR SEL 2
GND 3
PACKAGE CS
6-LEAD CHIPSCALE
(TOP VIEW)
V
DD
1
ADDR SEL 2
GND 3
6 SDA
5 INT
4 SCL
Package Drawings are Not to Scale
PACKAGE FN
DUAL FLAT NO-LEAD
(TOP VIEW)
6 SDA
5 INT
4 SCL
V
DD
1
ADDR SEL 2
GND 3
PACKAGE CL
6-LEAD ChipLED
(TOP VIEW)
4 SCL
3 ADDR SEL
2 GND
SDA 5
INT 6
V
DD
1
TSL2560, TSL2561
LIGHT-TO-DIGITAL CONVERTER
TAOS059N − MARCH 2009
2
r
r
Copyright E 2009, TAOS Inc.
The LUMENOLOGY r Company
www.taosinc.com
Functional Block Diagram
Two-Wire Serial Interface
Address Select Interrupt
SDA
V
DD
= 2.7 V to 3.5 V
Channel 0
Visible and IR
Channel 1
IR Only
Command
Register
ADC
Register
INT
SCL
ADDR SEL
Integrating
A/D Converter
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 I
2
C 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 INTERFACE PACKAGE − LEADS PACKAGE DESIGNATOR ORDERING NUMBER
TSL2560 SMBus Chipscale CS TSL2560CS
TSL2560 SMBus TMB-6 T TSL2560T
TSL2560 SMBus Dual Flat No-Lead − 6 FN TSL2560FN
TSL2560 SMBus ChipLED-6 CL TSL2560CL
TSL2561 I
2
C Chipscale CS TSL2561CS
TSL2561 I
2
C TMB-6 T TSL2561T
TSL2561 I
2
C Dual Flat No-Lead − 6 FN TSL2561FN
TSL2561 I
2
C ChipLED-6 CL TSL2561CL
TSL2560, TSL2561
LIGHT-TO-DIGITAL CONVERTER
TAOS059N − MARCH 2009
3
The LUMENOLOGY r Company
r
r
Copyright E 2009, TAOS Inc.
www.taosinc.com
Terminal Functions
TERMINAL
NAME
CS, T, FN
PKG
NO.
CL
PKG
NO.
TYPE DESCRIPTION
ADDR SEL 2 3 I SMBus device select — three-state
GND 3 2 Power supply ground. All voltages are referenced to GND.
INT 5 6 O Level or SMB Alert interrupt — open drain.
SCL 4 4 I SMBus serial clock input terminal — clock signal for SMBus serial data.
SDA 6 5 I/O SMBus serial data I/O terminal — serial data I/O for SMBus.
V
DD
1 1 Supply voltage.
Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
DD
(see Note 1) 3.8 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital output voltage range, V
O
−0.5 V to 3.8 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital output current, I
O
−1 mA to 20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
−40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ESD tolerance, human body model 2000 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltages are with respect to GND.
Recommended Operating Conditions
MIN NOM MAX UNIT
Supply voltage, V
DD
2.7 3 3.6 V
Operating free-air temperature, T
A
−30 70 °C
SCL, SDA input low voltage, V
IL
−0.5 0.8 V
SCL, SDA input high voltage, V
IH
2.1 3.6 V
Electrical Characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
I
Supply current
Active
0.24 0.6 mA
I
DD
Supply current
Power down
3.2 15 μA
V
INT SDA output low voltage
3 mA sink current 0
0.4 V
V
OL
INT, SDA output low voltage
6 mA sink current 0
0.6 V
I
LEAK
Leakage current −5 5 μA
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42

TSL2561T

Mfr. #:
Buy TSL2561T
Manufacturer:
ams
Description:
Light to Digital Converters Light to Digital with I2C
Lifecycle:
New from this manufacturer.
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