VCA2617

2 通道可变增益放大器

The is a dual-channel, continuously variable, voltage-controlled gain amplifier well-suited for a variety of ultrasound systems as well as applications in proximity detectors and test equipment. The VCA2617 uses a true variable-gain amplifier architecture, achieving very good noise performance at low gains, while not sacrificing high gain distortion performance.

Following a linear-in-dB response, the VCA2617 gain can be varied over a 48dB range with a 0.2V to 2.3V control voltage. Two separate high-impedance control inputs allow for a channel independent variation of the gains. Each channel of the VCA2617 can be configured to provide a gain range of -10dB to 38dB, or -16dB to 32dB, depending on the gain select pin HG\\. This post-gain feature allows the user to optimize the output swing of VCA2617 for a variety of high-speed analog-to-digital converters ADC. As a means to improve system overload recovery time, the VCA2617 also provides an internal clamping circuitry where an externally applied voltage sets the desired output clamping level.

The VCA2617 operates on a single +5V supply while consuming only 52mW per channel. It is available in a small QFN-32 package 5x5mm.

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INDEPENDENT CHANNEL CONTROLS:

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Gain Range: 48dB

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Clamping Levels

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Post-Gain: 0, +6dB

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LOW NOISE: 4.1nV/Hz

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LOW POWER: 52mW/Channel

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BANDWIDTH: 50MHz

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HARMONIC DISTOR ON: -53dBc at 5MHz

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CROSSTALK: -61dB at 5MHz

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5V SINGLE SUPPLY

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POWER-DOWN MODE

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SMALL QFN-32 PACKAGE 5x5mm

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APPLICATIONS

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MEDICAL AND INDUSTRIAL ULTRASOUND SYSTEMS

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Suitable for 10-Bit and 12-Bit Systems

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TEST EQUIPMENT

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SONAR

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