TSL230R-LF Datasheet, PDF (1/8 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – PROGRAMMABLE LIGHT-TO-FREQUENCY CONVERTERS

r
TSL230R−LF, TSL230AR−LF, TSL230BR−LF
PROGRAMMABLE LIGHT-TO-FREQUENCY CONVERTERS
r
TAOS079A − OCTOBER 2006
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 Single-Supply Operation Down to 2.7 V,
With Power-Down Feature
D Absolute Output Frequency Tolerance of
±5% (TSL230BR−LF)
D Nonlinearity Error Typically 0.2% at 100 kHz
D Stable 150 ppm/°C Temperature Coefficient
D Replacements for TSL230, TSL230R,
TSL230A, TSL230AR, TSL230B and
TSL230BR
D RoHS Compliant
DIP PACKAGE
(TOP VIEW)
S0 1
8 S3
S1 2
7 S2
OE 3
6 OUT
GND 4
5 V_DD
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
Light
Photodiode Array
S0 S1
Current-to-Frequency
Converter
Output
OE
S2 S3
The LUMENOLOGY r Company
r
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 2006, TAOS Inc.
1