KA2807

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Applications:	Earth Leakage Detector
Current - Supply:	19mA
Voltage - Supply:	--
Operating Temperature:	-40°C ~ 70°C
Mounting Type:	Through Hole
Package / Case:	8-DIP (0.300", 7.62mm)
Supplier Device Package:	8-DIP
Base Part Number:	KA2807

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### IntroductionThe KA2807 is an integrated AM/FM stereo radio chip produced by International Rectifier corporation that integrates most of the functions of a radio receiver. It is primarily used as a TV sound IF (intermediate frequency) chip, but can also be used in amateur radio receivers, and can be used to control the front-end of a digital radio receiver using direct conversion architectures.### ApplicationsThe main application of the KA2807 is as an Intermediate Frequency (IF) chip for television sound circuits. It offers excellent sensitivity, selectivity, and stability, making it an ideal choice for a wide range of television sound applications. Additionally, by configuring the KA2807 as an AM/FM radio receiver and pairing it with an analog-to-digital converter, it can be used in a variety of applications such as amateur radio receivers and digital radio receivers.### Working PrincipleThe KA2807 functions as an analog signal processor. It takes in an analog signal, cleans it up, and amplifies it. This process begins with an antenna connected to a variable gain amplifier (VGA) which will take in the radio signal. The signal is then sent to the KA2807’s discriminator, which works similar to a diode and converts the radio wave into a small analog signal. This signal is then further processed within the KA2807, which cleans the signal, further amplifies it, and outputs the resulting signal to an audio amplifier.### FeaturesThe main feature of the KA2807 is that it is a single-chip solution for most television sound IF requirements. This eliminates the need for bulky off-chip components such as low-noise amplifiers, voltage-controlled oscillators, and phase-locked loops. Additionally, this chip can be configured to support direct digital conversion architectures, allowing for simpler designs and reduced cost.The KA2807 also offers excellent sensitivity and selectivity, making it suitable for low-noise, highly-detailed audio. It has an adjustable gain control and can be tuned to specific frequencies. Additionally, it has an adjustable phase detection circuit which allows it to track signals quickly and accurately. It also provides low phase noise which helps with signal reception even in weak signal areas.### ConclusionThe KA2807 is an integrated AM/FM stereo radio chip produced by International Rectifier corporation. It is primarily used as a television sound IF chip, as it offers excellent sensitivity, selectivity and stability. Additionally, it can be configured as a single-chip radio solution for digital radio receiver applications. It offers adjustable gain control, frequency selection and adjustable phase detection for accurate signal reception, as well as low phase noise for weak signal areas. The KA2807 is an ideal solution for television sound applications and digital radio receiver applications.

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