TSL237SM-LF TAOS, TSL237SM-LF Datasheet

Light To Frequency & Light To Voltage Light to Frequency Converter

TSL237SM-LF

Manufacturer Part Number
TSL237SM-LF
Description
Light To Frequency & Light To Voltage Light to Frequency Converter
Manufacturer
TAOS
Datasheet

Specifications of TSL237SM-LF

Peak Wavelength
700 nm
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
- 25 C
Mounting Style
Through Hole
Product
Programmable Light-to-Frequency Converters
Package / Case
Side Looker S
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
r
Description
Functional Block Diagram
Available Options
The LUMENOLOGY r Company
DEVICE
TSL237
TSL237
TSL237
D
D
D
D
D
D
D
The TSL237 light-to-frequency converter combines a silicon photodiode and a current-to-frequency converter
on a single monolithic CMOS integrated circuit. Output is a square wave (50% duty cycle) with frequency directly
proportional to light intensity (irradiance) on the photodiode. The digital output allows direct interface to a
microcontroller or other logic circuitry. The device has been temperature compensated for the
ultraviolet-to-visible light range of 320 nm to 700 nm and responds over the light range of 320 nm to 1050 nm.
The TSL237 is characterized for operation over the temperature range of −40°C to 85°C and is supplied in a
3-lead clear plastic side-looker package with an integral lens. When supplied in the lead (Pb) free package, the
device is RoHS compliant.
For automotive and other extended temperature applications, please contact TAOS for information.
High-Resolution Conversion of Light
Intensity to Frequency With No External
Components
High Irradiance Responsivity . . .
Low Dark Frequency . . . < 2 Hz at 505 C
Single-Supply Operation . . . 2.7 V to 5.5 V
Stable 200 ppm/°C Temperature Coefficient
Interfaces Directly to a Microcontroller
RoHS Compliant (−LF Package Only)
2.3 kHz/(mW/cm
−40°C to 70°C
−40°C to 70°C
−40°C to 70°C
Light
T
A
2
) at λ
Texas Advanced Optoelectronic Solutions Inc.
3-lead Sidelooker
3-lead Sidelooker — Lead (Pb) Free
3-lead Surface-Mount Sidelooker — Lead (Pb) Free
Photodiode
1001 Klein Road S Suite 300 S Plano, TX 75074 S (972) 673-0759
p
= 524 nm
r
PACKAGE − LEADS
r
www.taosinc.com
Current-to-Frequency
Converter
LIGHT-TO-FREQUENCY CONVERTER
GND
(FRONT VIEW)
SIDELOOKER
1
PACKAGE DESIGNATOR
PACKAGE S
V
Output
2
DD
r
SM
S
S
3
OUT
HIGH-SENSITIVITY
TAOS052J − SEPTEMBER 2008
GND
Copyright E 2008, TAOS Inc.
SURFACE MOUNT
TSL237S
TSL237S−LF
TSL237SM−LF
ORDERING NUMBER
(FRONT VIEW)
PACKAGE SM
SIDELOOKER
1
V
2
DD
TSL237
3
OUT
1

Related parts for TSL237SM-LF

TSL237SM-LF Summary of contents

Page 1

... LIGHT-TO-FREQUENCY CONVERTER PACKAGE S SIDELOOKER (FRONT VIEW) 1 GND Current-to-Frequency Converter PACKAGE − LEADS PACKAGE DESIGNATOR r www.taosinc.com TSL237 HIGH-SENSITIVITY TAOS052J − SEPTEMBER 2008 PACKAGE SM SURFACE MOUNT SIDELOOKER (FRONT VIEW GND V OUT OUT DD Output ORDERING NUMBER S TSL237S S TSL237S−LF SM TSL237SM−LF Copyright E 2008, TAOS Inc ...

Page 2

... Nonlinearity Step response to full-scale step input § Nonlinearity is defined as the deviation of f Copyright E 2008, TAOS Inc. 2 DESCRIPTION DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

... TSL237 HIGH-SENSITIVITY TAOS052J − SEPTEMBER 2008 500 600 700 800 900 1000 1100 λ − Wavelength − nm Figure 2 OUTPUT FREQUENCY vs. FREE-AIR TEMPERATURE − − Free-Air Temperature − ° Figure 4 Copyright E 2008, TAOS Inc ...

Page 4

... A Figure 7 NOTE A: Internal offsets that result in dark frequency can be both positive and negative. The dashed line represents the case of negative offset in which an equivalent amount of light signal is required to obtain a non-zero output frequency. Copyright E 2008, TAOS Inc. 4 TYPICAL CHARACTERISTICS HORIZONTAL ANGULAR DISPLACEMENT 1.0 ...

Page 5

... The output of the device is designed to drive a CMOS logic input over short distances. If lines greater than 12 inches in length are used on the output, a buffer or line driver is recommended. The LUMENOLOGY r Company LIGHT-TO-FREQUENCY CONVERTER APPLICATION INFORMATION TSL237 Timer / Port OUT GND www.taosinc.com TSL237 HIGH-SENSITIVITY TAOS052J − SEPTEMBER 2008 MCU 2 ) Copyright E 2008, TAOS Inc ...

Page 6

... PCB Pad Layout Suggested PCB pad layout guidelines for the SM surface mount package are shown in Figure 10. NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. Figure 10. Suggested SM Package PCB Layout Copyright E 2008, TAOS Inc. 6 APPLICATION INFORMATION 1.0 1.0 1 ...

Page 7

... MECHANICAL DATA PLASTIC SINGLE-IN-LINE SIDE-LOOKER PACKAGE SIDE VIEW Pb Lead Free Available 2 in size and is located in the center of the lens and 0.97 mm below the r www.taosinc.com TSL237 HIGH-SENSITIVITY TAOS052J − SEPTEMBER 2008 0.15 Note B 4.60 1.56 14.86 + 0.50 0.42 Copyright E 2008, TAOS Inc ...

Page 8

... C. The integrated photodiode active area is typically located in the center of the lens and 0.97 mm below the top of the lens surface. D. Index of refraction of clear plastic is 1.55. E. Lead finish for TSL237SM−LF: solder dipped, 100% Sn. F. This drawing is subject to change without notice. Figure 12. Package SM — Surface Mount Side-Looker Package Configuration Copyright E 2008, TAOS Inc ...

Page 9

... 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 10

... TSL237 HIGH-SENSITIVITY LIGHT-TO-FREQUENCY CONVERTER TAOS052J − SEPTEMBER 2008 Copyright E 2008, TAOS Inc www.taosinc.com The LUMENOLOGY r Company r ...

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