TSL2550T TAOS, TSL2550T Datasheet

Industrial Optical Sensors Ambient Light Sensor SMBus

TSL2550T

Manufacturer Part Number
TSL2550T
Description
Industrial Optical Sensors Ambient Light Sensor SMBus
Manufacturer
TAOS
Type
Ambient Light Sensor with Digital Outputr
Datasheet

Specifications of TSL2550T

Product
Ambient Light Sensor
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TSL2550T
Manufacturer:
CITIZEN
Quantity:
1 920
Part Number:
TSL2550T
Manufacturer:
TAOS
Quantity:
13 643
r
Description
Functional Block Diagram
The LUMENOLOGY r Company
D
D
D
D
D
D
D
D
D
D
V
DD
The TSL2550 is a digital-output light sensor with
a two-wire, SMBus serial interface. It combines
two photodiodes and a companding analog-to-
digital converter (ADC) on a single CMOS
integrated circuit to provide light measurements
over an effective 12-bit dynamic range with a
response similar to that of the human eye.
The TSL2550 is designed for use with broad wavelength light sources. One of the photodiodes (channel 0) is
sensitive to visible and infrared light, while the second photodiode (channel 1) is sensitive primarily to infrared
light. An integrating ADC converts the photodiode currents to channel 0 and channel 1 digital outputs. Channel
1 digital output is used to compensate for the effect of the infrared component of ambient light on channel 0
digital output. The ADC digital outputs of the two channels are used to obtain a value that approximates the
human eye response in the commonly used unit of Lux.
This device is intended primarily for use in applications in which measurement of ambient light is used to control
display backlighting such as laptop computers, PDAs, camcorders, and GPS systems. Other applications
include contrast control in LED signs and displays, camera exposure control, lighting controls, etc. The
integrating conversion technique used by the TSL2550 effectively eliminates the effect of flicker from
AC-powered lamps, increasing the stability of the measurement.
= 2.7 V to 5.5 V
Converts Light Intensity to Digital Signal
Infrared Compensation to Approximate
Human Eye Response
Companding A/D for Wide Dynamic Range
Rejects 50 Hz/60 Hz Lighting Ripple
Two-Wire SMBus Serial Interface
Single Supply Operation (2.7 V to 5.5 V)
Low Active Power (1 mW typ)
Power Down Mode
Low-Profile Surface-Mount Packages
RoHS Compliant
Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road S Suite 300 S Plano, TX 75074 S (972) 673-0759
r
Photodiode
Channel 0
Control Logic
r
www.taosinc.com
Photodiode
Two-Wire Serial Interface
Channel 1
A/D Converter
Integrating
GND 4
Output Registers
V
NC 2
NC 3
DD
GND 2
1
V
DD
r
1
4-LEAD SMD
PACKAGE T
8-LEAD SOIC
(TOP VIEW)
PACKAGE D
(TOP VIEW)
AMBIENT LIGHT SENSOR
WITH SMBus INTERFACE
TAOS029L − OCTOBER 2007
Copyright E 2007, TAOS Inc.
4 SMBData
3 SMBCLK
8 SMBData
7 NC
6 NC
5 SMBCLK
SMBCLK
SMBData
TSL2550
1

Related parts for TSL2550T

TSL2550T Summary of contents

Page 1

... Control Logic Output Registers Two-Wire Serial Interface r www.taosinc.com TSL2550 AMBIENT LIGHT SENSOR WITH SMBus INTERFACE TAOS029L − OCTOBER 2007 PACKAGE D 8-LEAD SOIC (TOP VIEW SMBData SMBCLK PACKAGE T 4-LEAD SMD (TOP VIEW SMBData DD GND 2 3 SMBCLK SMBCLK SMBData Copyright E 2007, TAOS Inc ...

Page 2

... www.taosinc.com ORDERING NUMBER D TSL2550D T TSL2550T −0 − −40°C to 85°C −40°C to 85° MIN MAX 2.7 5 ...

Page 3

... Ch0 155 counts counts Ch1 16 Ch0 155 Ch1 139 0.070 0.106 0.175 0.70 0.88 1.20 Ch0 11.1 counts/ Ch1 1.2 (μW/ (μW/ Ch0 5 Ch1 5 Ch0 2.8 Ch1 0.23 counts/ counts/ lux Ch0 19 Ch1 13 0.65 1 1.35 0.5 1 1.5 Copyright E 2007, TAOS Inc ...

Page 4

... SMBCLK clock low period (LOW) t SMBCLK clock high period (HIGH) t Detect clock/data low timeout (TIMEOUT) t Clock/data fall time F t Clock/data rise time R C Input pin capacitance i Copyright E 2007, TAOS Inc 3 255C (unless otherwise noted TEST CONDITIONS r www.taosinc.com MIN TYP MAX UNIT 400 ...

Page 5

... D6 D5 ACK by TSL2550 R ACK by TSL2550 Frame 2 Data Byte From TSL2550 r www.taosinc.com TSL2550 AMBIENT LIGHT SENSOR WITH SMBus INTERFACE TAOS029L − OCTOBER 2007 t (SUSTO Stop ACK t (LOWMEXT ACK by TSL2550 Frame 2 Command Byte NACK by Master Copyright E 2007, TAOS Inc. r Stop by Master Stop by Master 5 ...

Page 6

... TAOS029L − OCTOBER 2007 SPECTRAL RESPONSIVITY 1 0.8 Channel 0 Photodiode 0.6 0.4 Channel 1 Photodiode 0.2 0 400 500 600 700 800 λ − Wavelength − nm Figure 4 Copyright E 2007, TAOS Inc. 6 TYPICAL CHARACTERISTICS 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 2.5 3 900 1000 1100 r www ...

Page 7

... Figure 6. Send Byte Protocol Slave Address RD A Data Byte P = Stop Condition Shaded = Slave Transmission Figure 7. Receive Byte Protocol r www.taosinc.com TSL2550 AMBIENT LIGHT SENSOR WITH SMBus INTERFACE TAOS029L − OCTOBER 2007 × . The extended range allows the device Copyright E 2007, TAOS Inc ...

Page 8

... ADCEN was asserted in the COMMAND register. CHORD CHORD number. STEP STEP number. Copyright E 2007, TAOS Inc. 8 Table 1. Command Summary FUNCTION Power-down state Power-up state/Read command register Write command to assert extended range mode Write command to reset or return to standard range mode ...

Page 9

... TSL2550 AMBIENT LIGHT SENSOR WITH SMBus INTERFACE TAOS029L − OCTOBER 2007 STEP S, STEP BITS NUMBER B3, B2, B1, B0 0000 0 0001 1 0010 2 0011 3 0100 4 0101 5 0110 6 0111 7 1000 8 1001 9 1010 10 1011 11 1100 12 1101 13 1110 14 1111 15 (Step Number Copyright E 2007, TAOS Inc ...

Page 10

... Note also that the command register itself may be read check to be sure that the device is communicating properly. To power down the device for reduced power consumption, issue an SMBus Send Byte protocol with the device address followed indicated in Table 1. Copyright E 2007, TAOS Inc www.taosinc.com ...

Page 11

... NOTE: Please see TAOS application notes for additional information, including implementing a display brightness control system with the TSL2550, and for a simple implementation of the equation shown above suitable for use in embedded microcontrollers. ...

Page 12

... NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. Figure 8. Suggested D Package PCB Layout 1.00 NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. Figure 9. Suggested T Package PCB Layout Copyright E 2007, TAOS Inc. 12 APPLICATION INFORMATION 4.65 6.90 1.27 2.25 ...

Page 13

... PIN 1 SIDE VIEW 0.510 y 8 0.330 j 2.8 TYP CLEAR WINDOW SENSOR DIE www.taosinc.com TSL2550 AMBIENT LIGHT SENSOR WITH SMBus INTERFACE TAOS029L − OCTOBER 2007 Plastic Small-Outline 5.00 4.80 5.3 MAX DETAIL A 0.25 0.19 1.27 0.25 0.41 0.10 Copyright E 2007, TAOS Inc ...

Page 14

... NOTES: A. All linear dimensions are in millimeters. B. Terminal finish is gold. C. Dimension tolerance is ± 0.15 mm. D. This drawing is subject to change without notice. Figure 11. Package T — Four-Lead Surface Mount Device Packaging Configuration Copyright E 2007, TAOS Inc. 14 MECHANICAL DATA PHOTODIODE ACTIVE AREA LOCATION 1.46 PIN 4 ...

Page 15

... D. Each reel is 178 millimeters in diameter and contains 1000 parts. E. TAOS packaging tape and reel conform to the requirements of EIA Standard 481− accordance with EIA standard, device pin 1 is located next to the sprocket holes in the tape. G. This drawing is subject to change without notice. ...

Page 16

... D. Each reel is 178 millimeters in diameter and contains 1000 parts. E. TAOS packaging tape and reel conform to the requirements of EIA Standard 481− accordance with EIA standard, device pin 1 is located next to the sprocket holes in the tape. G. This drawing is subject to change without notice. ...

Page 17

... Time above 217°C Time above 230°C Time above T −10°C peak Peak temperature in reflow Temperature gradient in cooling T peak Time (sec) Figure 14. TSL2550D/TSL2550T Solder Reflow Profile Graph The LUMENOLOGY r Company MANUFACTURING INFORMATION Table 5. TSL2550 Solder Reflow Profile REFERENCE t soak peak t ...

Page 18

... Opened Time Rebaking will be required if the devices have been stored unopened for more than 6 months or if the aluminized envelope has been open for more than 168 hours. If rebaking is required, it should be done at 90°C for 4 hours. Copyright E 2007, TAOS Inc. 18 MANUFACTURING INFORMATION 5° ...

Page 19

... TAOS further makes no claim as to the suitability of its products for any particular purpose, nor does TAOS assume any liability arising out of the use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages ...

Page 20

... TSL2550 AMBIENT LIGHT SENSOR WITH SMBus INTERFACE TAOS029L − OCTOBER 2007 Copyright E 2007, TAOS Inc www.taosinc.com The LUMENOLOGY r Company r ...

Related keywords