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Description
The AN22023A-VT is an amplifier circuit designed to be a simple and low-cost add-on to the SA253x single chip telephone family. It amplifies the receive signal from the RO1 or RO2 outputs of the telephone. Although it does not have advanced features such as channel switching or anti-larsen circuit, it can enable full duplex "handsfree" operation at short distances (<2m) when the handset is placed next to the telephone with the microphone facing the user. The SA253x circuits have excellent sidetone cancellation, which prevents howling between the handset microphone and loudspeaker in normal operation.
Specifications and features
- Low-cost additional circuit for loudhearing function
- Full duplex "handsfree" operation with handset microphone and loudspeaker (at distances <2m)
- Compatible with any SA253x application
- Enables use of low-cost 8Ω loudspeaker
- High output power with low distortion
- Powered entirely from the telephone line
- No influence on loudspeaker amplifier in AC-impedance, sidetone cancellation, or DC-mask
- Loudspeaker volume adjustable by potentiometer
Application Scenarios
The AN22023A-VT amplifier circuit can be used in a variety of scenarios, including:
- Improving the volume and sound quality of telephones
- Adding loudhearing function to telephones
Comparison
Advantages- Low-cost solution
- Enables full duplex "handsfree" operation
- Can be added to any SA253x application
- High output power with low distortion
- Easy installation as it is powered from the telephone line
- Sidetone cancellation prevents howling between microphone and loudspeaker
Disadvantages- No advanced features such as channel switching or anti-larsen circuit
- Lower receive and transmit gains to avoid howling
- Limited to short distances (<2m) for full duplex operation
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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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- - Inquiry, Add to inquiry sheet/Submit bom/inquire file/Send email us > Quote > Place order > Complete payment >Delivery.
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Payment:
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- - Wire transfer, include Local bank transfer.
- - Western Union.
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Popular parts of the same kind
- Datasheet: Download AN22023A-VT
- Chipdatas Part: CD94-AN22023A-VT
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/10/01 13:59 +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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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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We recommend to use bank transfer for large orders to save on handling fees.
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