TSL237 Datasheet, PDF (2/11 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – HIGH-SENSITIVITY LIGHT-TO-FREQUENCY CONVERTER

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TSL237
HIGH-SENSITIVITY
r
LIGHT-TO-FREQUENCY CONVERTER
TAOS052J − SEPTEMBER 2008
D High-Resolution Conversion of Light
Intensity to Frequency With No External
Components
D High Irradiance Responsivity . . .
2.3 kHz/(mW/cm²) at λ_p = 524 nm
PACKAGE S
SIDELOOKER
(FRONT VIEW)
PACKAGE SM
SURFACE MOUNT
SIDELOOKER
(FRONT VIEW)
D Low Dark Frequency . . . < 2 Hz at 505 C
D Single-Supply Operation . . . 2.7 V to 5.5 V
D Stable 200 ppm/°C Temperature Coefficient
D Interfaces Directly to a Microcontroller
alid ^{D RoHS Compliant (−LF Package Only)}
123
GND V_DD OUT
ill ^{v 1 2 3}
GND V_DD OUT
t _Description
G ^{The TSL237 light-to-frequency converter combines a silicon photodiode and a current-to-frequency converter}
s _{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
A ^t _{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.
s ^{n 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
e _{device is RoHS compliant.}
m ^{t For automotive and other extended temperature applications, please contact TAOS for information.}
a _{on Functional Block Diagram}
l ^{c Light}
Photodiode
Current-to-Frequency
Converter
Output
ica _{Available Options}
n _DEVICE
TSL237
h _TSL237
Tec ^TSL237
T_A
−40°C to 70°C
−40°C to 70°C
−40°C to 70°C
PACKAGE − LEADS
3-lead Sidelooker
3-lead Sidelooker — Lead (Pb) Free
3-lead Surface-Mount Sidelooker — Lead (Pb) Free
PACKAGE DESIGNATOR ORDERING NUMBER
S
TSL237S
S
TSL237S−LF
SM
TSL237SM−LF
The LUMENOLOGY r Company
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Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road S Suite 300 S Plano, TX 75074 S (972_r) 673-0759
www.taosinc.com
Copyright E 2008, TAOS Inc.
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