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參數(shù)資料
| 型號： | TSL238T |
| 廠商： | AMS-TAOS USA Inc |
| 文件頁數(shù)： | 2/13頁 |
| 文件大小： | 624K |
| 描述： | IC LIGHT TO FREQUENCY CONV 4-TMB |
| 標準包裝： | 1 |
| 系列： | * |
| 其它名稱： | TSL238-TDKR |
TSL238T
HIGH-SENSITIVITY
LIGHT-TO-FREQUENCY CONVERTER
TAOS080G DECEMBER 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 High Irradiance Responsivity . . .
3.4 kHz/(mW/cm
2
) at ?/SPAN>
p
= 640 nm
D Low Dark Frequency . . . < 6 Hz at 505 C
D Single-Supply Operation . . . 2.7 V to 5.5 V
D Stable 200 ppm/?/SPAN>C Temperature Coefficient
D Interfaces Directly to a Microcontroller
D Lead (Pb) Free Package
D RoHS Compliant
Description
The TSL238T 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. Output enable (OE
) places the output in a 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.
The TSL238T is characterized for operation over the temperature range of 40癈 to 85癈 and is supplied in
a compact 4-lead surface-mount package that is lead (Pb) free and RoHS compliant.
Functional Block Diagram
Light
Current-to-Frequency
Converter
Photodiode
Output
Available Options
DEVICE
T
A
PACKAGE LEADS
PACKAGE DESIGNATOR
ORDERING NUMBER
TSL238T
40癈 to 85癈
4-lead Low Profile Surface Mount
T
TSL238T
Terminal Functions
TERMINAL
NAME
T PKG
NO.
TYPE
DESCRIPTION
GND
2
Power supply ground (substrate). All voltages are referenced to GND.
OE
1
I
Enable for f
O
(active low).
OUT
4
O
Output frequency.
V
DD
3
Supply voltage.
r
r
Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road S Suite 300 S Plano, TX 75074 S (972) 673-0759
PACKAGE T
4-LEAD SMD
(TOP VIEW)
OE
1
GND 2
4 OUT
3 V
DD
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