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TSL230R−LF, TSL230AR−LF, TSL230BR−LF
PROGRAMMABLE LIGHT-TO-FREQUENCY CONVERTERS
TAOS079A
−
OCTOBER 2006
D
High-Resolution Conversion of Light
D
Intensity to Frequency With No External
Components
Programmable Sensitivity and Full-Scale
Output Frequency
DIP PACKAGE
(TOP VIEW)
S0 1
S1 2
OE 3
GND 4
8 S3
7 S2
6 OUT
5 V
DD
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Communicates Directly With a Microcontroller
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Single-Supply Operation Down to 2.7 V,
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With Power-Down Feature
Absolute Output Frequency Tolerance of
±5%
(TSL230BR−LF)
Nonlinearity Error Typically 0.2% at 100 kHz
Stable 150 ppm/°C Temperature Coefficient
Replacements for TSL230, TSL230R,
TSL230A, TSL230AR, TSL230B and
TSL230BR
RoHS Compliant
Description
The TSL230R−LF, TSL230AR−LF, and TSL230BR−LF programmable light-to-frequency converters combine
a configurable silicon photodiode and a current-to-frequency converter on single monolithic CMOS integrated
circuits. The output can be either a pulse train or a square wave (50% duty cycle) with frequency directly
proportional to light intensity. Device sensitivity is selectable in three ranges, providing two decades of
adjustment. The full-scale output frequency can be scaled by one of four preset values. All inputs and the output
are TTL compatible, allowing direct two-way communication with a microcontroller for programming and output
interface. An output enable (OE) is provided that places the output in the high-impedance state for multiple-unit
sharing of a microcontroller input line.
The devices are available with absolute-output-frequency tolerances of
±
5% (TSL230BR−LF),
±
10%
(TSL230AR−LF), or
±20%
(TSL230R−LF). They have been temperature compensated for the
ultraviolet-to-visible light range of 320 nm to 700 nm and respond over the light range of 320 nm to 1050 nm.
The devices are characterized over the temperature range of
−25°C
to 70°C.
Functional Block Diagram
Output
Light
Photodiode Array
Current-to-Frequency
Converter
OE
S0
S1
S2
S3
The
LUMENOLOGY
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Company
Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road
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Suite 300
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Plano, TX 75074
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(972) 673-0759
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www.taosinc.com
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Copyright
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2006, TAOS Inc.
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
