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Description
Phototransistors are photodiode-amplifier combinations integrated within a single silicon chip. These are combined to overcome the major fault of photodiodes: unity gain. Many applications demand a greater output signal from the photodetector than can be generated by a photodiode alone. While the signal from a photodiode can always be amplified through use of an external op-amp or other circuitry, this approach is often not as practical or as cost-effective as the use of phototransistors. The phototransistor can be viewed as a photodiode whose output photocurrent is fed into the base of a conventional small-signal transistor. While not required for operation of the device as a photodetector, a base connection is often provided, allowing the designer the option of using base current to bias the transistor. The typical gain of a phototransistor can range from 100 to over 1500.
Specifications and features
• Low-cost visible and near-IR photodetection
• Available with gains from 100 to over 1500
• Moderately fast response times
• Available in a wide range of packages including epoxy-coated, transfer-molded, cast, hermetic packages, chip form and surface mounting technology
• Usable with almost any visible or near-infrared light source such as IREDs, neon, fluorescent, incandescent bulbs, lasers, flame sources, sunlight, etc.
• Same general electrical characteristics as familiar signal transistorsApplication Scenarios
• Computer/business equipment
• Write-protect control
• Margin controls—printers
• Industrial
• LED light source—light pens
• Security systems
• Safety shields
• Consumer
• Coin counters
• Lottery card readers
• Position sensors—joysticks
• Remote controllers—toys, appliances, audio/visual equipment
• Games—laser tag
• Camera shutter controlComparison
Advantages• Low-cost visible and near-IR photodetection
• Available with gains from 100 to over 1500
• Moderately fast response times
• Wide range of package options
• Usable with almost any visible or near-infrared light sourceDisadvantages• Requires an external op-amp or other circuitry for amplification of signal from photodiodes
• Base connection is often provided but not required for operation of the device -
Similar parts: 430483 , Click to view
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Datasheet
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Shopping guide
Delivery period:
- - Will ship out in 2-3 days
- - DHL Express: 3-7 business days
- - DHL eCommerce: 12-22 business days
- - FedEx International Priority: 3-7 business days
- - EMS: 10-15 business days
Shipping fee:
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Shipping option:
DHL, FedEx, EMS, SF Express, and Registered Air MailShipping tracking:
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How to Buy:
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Popular parts of the same kind
- Datasheet: Download TT1320
- Chipdatas Part: CD94-TT1320
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/06/03 12:51 +0800
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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The fee is charged according to the rule of PayPal.
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Western Union charge US$0.00 banking fee.
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