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參數資料
型號: TSL237T
廠商: AMS-TAOS USA Inc
文件頁數: 2/13頁
文件大?。?/td> 621K
描述: IC LIGHT TO FREQUENCY CONV 4-TMB
標準包裝: 1
傳感器類型: 光轉頻率轉換器
輸出類型: 數字
其它名稱: TSL237-TDKR
TSL237T
HIGH-SENSITIVITY
LIGHT-TO-FREQUENCY CONVERTER
TAOS055J  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  . . .
 1.2 kHz/(mW/cm
2
) at ?/SPAN>
p
 = 640 nm
D   Low Dark Frequency  . . . < 2 Hz at 505 C
D   Single-Supply Operation  . . . 2.7 V to 5.5 V
D   Stable 200 ppm/?/SPAN>C Temperature Coefficient
D   Communicates Directly with a
Microcontroller
D   RoHS Compliant
 
Description
The TSL237T 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 TSL237T 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.
Functional Block Diagram
Light
Current-to-Frequency
Converter
Photodiode
Output
OE
Available Options
DEVICE
T
A
PACKAGE  LEADS
PACKAGE DESIGNATOR
ORDERING NUMBER
TSL237T
40癈 to 85?/DIV>
4-lead Low Profile Surface Mount
T
TSL237T
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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