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參數資料
| 型號： | TSL237SM-LF |
| 廠商： | AMS-TAOS USA Inc |
| 文件頁數： | 7/11頁 |
| 文件大小： | 570K |
| 描述： | IC LIGHT TO FREQUENCY CONV 3SMD |
| 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-SM-LFDKR TSL237-SM-LFDKR-ND TSL237SM-LFDKR |
TSL237
HIGH-SENSITIVITY
LIGHT-TO-FREQUENCY CONVERTER
TAOS052J SEPTEMBER 2008
6
r
r
Copyright E 2008, TAOS Inc.
The LUMENOLOGY r Company
www.taosinc.com
APPLICATION INFORMATION
Measuring the Frequency
The choice of interface and measurement technique depends on the desired resolution and data-acquisition
rate. For maximum data-acquisition rate, period-measurement techniques are used.
Period measurement requires the use of a fast reference clock with available resolution directly related to the
reference-clock rate. The technique is employed to measure rapidly varying light levels or to make a fast
measurement of a constant light source.
Maximum resolution and accuracy may be obtained using frequency-measurement, pulse-accumulation,
or integration techniques. Frequency measurements provide the added benefit of averaging out random- or
high-frequency variations (jitter) resulting from noise in the light signal. Resolution is limited mainly by available
counter registers and allowable measurement time. Frequency measurement is well suited for slowly varying
or constant light levels and for reading average light levels over short periods of time. Integration, the
accumulation of pulses over a very long period of time, can be used to measure exposure the amount of light
present in an area over a given time period.
PCB Pad Layout
Suggested PCB pad layout guidelines for the SM surface mount package are shown in Figure 10.
3.2
1.0
1.0
1.0
1.0
1.0
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
Figure 10. Suggested SM Package PCB Layout
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| TSL237T | 功能描述:光頻率和光電壓 Light to Frequency High Responsivity RoHS:否 制造商:ams 峰值波長:1000 nm 工作電源電壓:5 V 最大工作溫度:+ 85 C 最小工作溫度:- 25 C 安裝風格: 封裝 / 箱體: |
| TSL238 | 制造商:TAOS 制造商全稱:TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS 功能描述:HIGH-SENSITIVITY LIGHT-TO-FREQUENCY CONVERTER |
| TSL238D | 功能描述:光頻率和光電壓 Light to Frequency Converter RoHS:否 制造商:ams 峰值波長:1000 nm 工作電源電壓:5 V 最大工作溫度:+ 85 C 最小工作溫度:- 25 C 安裝風格: 封裝 / 箱體: |
| TSL238D-TR | 功能描述:光頻率和光電壓 Light to Frequency High Sensitivity RoHS:否 制造商:ams 峰值波長:1000 nm 工作電源電壓:5 V 最大工作溫度:+ 85 C 最小工作溫度:- 25 C 安裝風格: 封裝 / 箱體: |
| TSL238T | 功能描述:光頻率和光電壓 LIGHT TO FREQ CONV RoHS:否 制造商:ams 峰值波長:1000 nm 工作電源電壓:5 V 最大工作溫度:+ 85 C 最小工作溫度:- 25 C 安裝風格: 封裝 / 箱體: |
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