Voltage - Input Offset:	3µV
Base Part Number:	AD8639
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Voltage - Supply, Single/Dual (±):	5 V ~ 16 V, ±2.5 V ~ 8 V
Current - Output / Channel:	37mA
Current - Supply:	1.25mA
Series:	--
Current - Input Bias:	1pA
Gain Bandwidth Product:	1.5MHz
Slew Rate:	2 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	2
Amplifier Type:	Zero-Drift
Part Status:	Active
Packaging:	Tape & Reel (TR)

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AD8639ARZ-REEL7 : Application Field and Working Principle

Introduction

The AD8639ARZ-REEL7 is a dual JFET-input operational transconductance amplifier (OTA) with a wide range of applications. It is designed to offer high dynamic range and low power consumption with the ability to drive a wide range of loads. This makes it suitable for applications in audio, video, instrumentation, and control systems, and for power management tasks.

Application Field

The AD8639ARZ-REEL7 is a dual JFET-input operational transconductance amplifier (OTA) with a wide range of applications. It has been designed to offer high dynamic range and low power consumption, making it suitable for applications in audio, video, instrumentation, and control systems, and for power management tasks.The wide dynamic range of the AD8639ARZ-REEL7 makes it an ideal component for multi-channel, low-cost digital audio converters, where dynamic range, distortion and power consumption are very important. The dual OTA design of the AD8639ARZ-REEL7 allows two independent channels to be operated in parallel. This reduces component count and board space compared to single channel operation.The AD8639ARZ-REEL7 is also suitable for precision control applications such as mechanical loops where multiple inputs and outputs need to be precisely evaluated and accurately tracked. It is also suitable for digital modulation and baseband signal conditioning circuits.

Working Principle

The AD8639ARZ-REEL7 is a dual JFET-input operational transconductance amplifier (OTA). It has a wide range of applications, such as audio, video, instrumentation, and control systems, and for power management tasks.The AD8639ARZ-REEL7 utilizes a JFET differential amplifier concept, which offers high linearity, low noise, and wide dynamic range. The JFET differential amplifier works by comparing the voltages of two input signals and producing an output that is proportional to the difference between them. The output can be either current or voltage, depending on the load on the output.The gain of the amplifier is determined by two parameters; the input voltage and the feedback resistance. The AD8639ARZ-REEL7 has two controlled inputs; the control voltage (Vcontrol) and the feedback resistance (Rfb). The control voltage is used to adjust the gain of the amplifier, while the feedback resistance is used to adjust the offset and output level.The AD8639ARZ-REEL7 is a versatile OTA, offering superior performance in applications such as multi-channel digital audio conversion, mechanical loop control, digital modulation, and baseband signal conditioning.

Conclusion

The AD8639ARZ-REEL7 is a dual JFET-input operational transconductance amplifier (OTA) featuring low power consumption, high dynamic range, and good linearity. It is suitable for applications in audio, video, instrumentation, control systems, and power management tasks. The dual OTA design of the AD8639ARZ-REEL7 is well-suited for multi-channel operations and its versatility makes it suitable for a variety of applications. The gain of the amplifier is adjustable via the control voltage and feedback resistance, allowing the output to be accurately tracked and precisely evaluated.

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