TSL230RD
PROGRAMMABLE LIGHT−TO−FREQUENCY CONVERTERS
TAOS054 - SEPTEMBER 2003
1
The
LUMENOLOGY
r Company
r
r
Copyright
E 2003, TAOS Inc.
www.taosinc.com
D High-Resolution Conversion of Light
Intensity to Frequency With No External
Components
D Programmable Sensitivity and Full-Scale
Output Frequency
D Communicates Directly With a Microcontroller
D High Irradiance Responsivity . . .
830 Hz/(
mW/cm2) Typical at 640 nm
D Single-Supply Operation . . . 2.7 V to 5.5 V
D Power-Down Feature ...5 mA Typical
D Nonlinearity Error Typically 0.2% at 100 kHz
D Stable 200 ppm/°C Temperature Coefficient
D Low-Profile Surface-Mount Package
Description
The TSL230RD programmable light-to-frequency converter combines a configurable silicon photodiode and a
current-to-frequency converter on single monolithic CMOS integrated circuit. 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. The output enable (OE) places the
output in the high-impedance state for multiple-unit sharing of a microcontroller input line.
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. It is characterized over the temperature range of -25
°C
to 70
°C.
Functional Block Diagram
Light
Current-to-Frequency
Converter
Photodiode Array
S0
S1
S2
S3
OE
Output
r
r
Texas Advanced Optoelectronic Solutions Inc.
800 Jupiter Road, Suite 205
S Plano, TX 75074 S (972) 673-0759
8 S3
7 S2
6 OUT
5 VDD
PACKAGE D
8-LEAD SOIC
(TOP VIEW)
S0 1
S1 2
OE 3
GND 4
Spanish ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
