光-频率 (LTF) 传感器将光强度的测量结果转换为微控制器可直接读取的数字形式。该器件的输出形式是一个方波或脉冲序列，其频率与光强度成线性正比。LTF 转换器专为环境光测量及光吸收/反射应用设计，其产品有白色家电、照相器材、比色法、化学分析仪和显示屏对比度控制等。它们也可以用于任何需要宽动态范围的系统和/或高分辨率的光数字测量应用。
| PartNo | Description | Supply Voltage V | Responsivity Hz/µW/cm² | Max. Output Frequency MHz | Selectable Sensitivity and Full-Scale Output Frequency | Output Frequency Tolerances +/- % | Temperature Range °C | Packages | Remark | Datasheet | Demo | Buy | PartNo |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TSL235R | Converter sidelooker package | 2.7-5.5 | 625 @ 635 | 0.5 | 20 | -25 to 70 | S | Not recommended for new design. Please see Ambient Light Sensors device family. | TSL235R | ||||
| TSL237 | Sidelooker package | 2.7-5.5 | 1200 @ 640 | 1 | 20 | -40 to 85 | S, SM | Not recommended for new design. Please see Ambient Light Sensors device family. | TSL237 | ||||
| TSL237T | High-sensitivity converter low profile 4-lead package | 2.7-5.5 | 1200 @ 640 | 1 | 20 | -40 to 85 | T | Not recommended for new design. Please see Ambient Light Sensors device family. | TSL237T | ||||
| TSL238T | High-sensitivity converter low profile 4-pin package | 2.7-5.5 | 3400 @ 640 | 1 | 20 | -40 to 85 | T | Not recommended for new design. Please see Ambient Light Sensors device family. | TSL238T |