TSL245R
INFRARED LIGHT-TO-FREQUENCY CONVERTER
TAOS060D SEPTEMBER 2007
1
The LUMENOLOGY r Company
r
r
Copyright E 2007, TAOS Inc.
www.taosinc.com
D High-Resolution Conversion of Light
Intensity to Frequency With No External
Components
D Communicates Directly With a
Microcontroller
D Compact Three-Leaded Plastic Package
D Integral Visible-Light Cutoff Filter
D Single-Supply Operation . . . 2.7 V to 5.5 V
D High Irradiance Responsivity . . . Typically
500 Hz/(?/SPAN>W/cm
2
) at 940 nm
D Nonlinearity Error Typically 0.2% at 100 kHz
D Available in Through-Hole and Surface
Mount Three-Lead Sidelooker Packages
D Replacement for TSL245
D Lead (Pb) Free Package Option Available
Description
The TSL245R 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 TSL245R is characterized for operation over the temperature range
of 25癈 to 70癈 and is supplied in a 3-lead plastic side-looker package with an integral visible-light cutoff filter
and lens. When supplied in the lead (Pb) free package, the devices are RoHS compliant.
Functional Block Diagram
Light
Current-to-Frequency
Converter
Photodiode
Output
Available Options
DEVICE
T
A
PACKAGE LEADS
PACKAGE DESIGNATOR
ORDERING NUMBER
TSL245R
25癈 to 70?/DIV>
3-lead Sidelooker
S
TSL245R
TSL245R
25癈 to 70?/DIV>
3-lead Sidelooker Lead (Pb) Free
S
TSL245RLF
TSL245R
25癈 to 70?/DIV>
3-lead Surface Mount Sidelooker
SM
TSL245RSM
TSL245R
25癈 to 70?/DIV>
3-lead Surface Mount Side-Looker Lead (Pb)
Free
SM
TSL245RSMLF
r
r
Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road S Suite 300 S Plano, TX 75074 S (972) 673-0759
PACKAGE S
SIDELOOKER
(FRONT VIEW)
1
GND
2
V
DD
3
OUT
PACKAGE SM
SURFACE MOUNT
SIDELOOKER
(FRONT VIEW)
1
GND
2
V
DD
3
OUT
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