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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