AD829JN

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Applications:	Voltage Feedback
Output Type:	--
Number of Circuits:	1
-3db Bandwidth:	120MHz
Slew Rate:	230 V/µs
Current - Supply:	5.3mA
Current - Output / Channel:	32mA
Voltage - Supply, Single/Dual (±):	±4.5 V ~ 18 V
Mounting Type:	Through Hole
Package / Case:	8-DIP (0.300", 7.62mm)
Supplier Device Package:	8-PDIP
Base Part Number:	AD829

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AD829JN Amplifier Application Field and Working Principle

The AD829JN is a high-speed, single-supply, JFET-input amplifier that is a versatile three-amplifier module which is very useful in a variety of linear, video and RF applications. It provides a low-noise, low-distortion alternative to bipolar and traditional video amplifiers, making it ideal for video and RF circuits.

The AD829JN Application Field

The AD829JN from Analog Devices is the industry\'s highest-speed, single-supply, JFET-input amplifier. It works great as a cable driver or line driver amplifier in video, RF or general-purpose applications. It also serves as a low-noise preamp and low-noise current source in low-gain (1V/V) applications. The module provides excellent performance at high-frequencies (up to 1 MHz) and fast open-loop settle time (up to 1 V step) at low-gain settings, making it well-suited for cable, line, or audio applications. Additionally, the AD829JN can be used as a high-performance op-amp/filter replacement with integrated output-voltage limiting and RC filter circuits. The AD829JN is also suitable for a wide range of video applications such as video amplifiers, video format converters, auto-gain and auto-black-level circuits, video mixers and RF amplifiers.

The AD829JN Operating Principle

The main operating principle of the AD829JN is that it offers a single-supply, low-noise, low-distortion alternative to conventional bipolar and other video amplifiers. The module is powered by a single 7-V to 18-V power supply, and its low-distortion performance makes it ideal for a variety of applications. The AD829JN uses a single-ended differential architecture that makes use of unique architecture and circuitry to achieve outstanding performance. The first stage of the module is a common-mode FET-input amplifier with a second stage as an active-output-follower. The third stage is an RC filter that compensates for the previous two stages, allowing for low-distortion video signals. The single-ended design of the AD829JN also offers high-speed settling and enhanced common-mode noise performance.Despite its small size, the AD829JN provides a class-leading performance with low-noise operation and high-speed performance (up to 1 MHz). Additionally, the AD829JN is designed with a high-impedance input stage with low-power-supply noise and a wideband demodulator. It also has a low output-impedance, low-distortion, and fast settling time when powered with a 7 V to 18 V power supply. The AD829JN utilizes pulsed-emission audio-filtering that prevents sub-harmonic tones from being generated by the amplifier and simplifies the frequency-response requirements. Additionally, it provides a low-filter corner frequency and a low cutoff frequency, with a fast settling time. Finally, the AD829JN utilizes a differential amplifier internally, which is used to provide the high-frequency wide-bandwidth capabilities of the amplifier. The circuit also has an output-protection circuit protected by an adjustable limiting current. It also integrates a high slew-rate, which allows for operation up to 1 MHz without compromise in video performance.

Conclusion

The AD829JN from Analog Devices is the industry\'s highest-speed, single-supply, JFET-input amplifier. Its low-noise and low-distortion performance make it an ideal choice for a variety of linear, video and RF applications. The module’s single-ended differential architecture provides excellent settling time, low-distortion performance and a wideband demodulator. Additionally, the AD829JN has an adjustable limiting current protection circuit and a high slew-rate that allows for operation up to 1 MHz. All in all, the AD829JN is a powerful and versatile easy-to-use solution for all linear, video, and RF applications.

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