VCA2617 Datasheet | Burr-Brown

.. SBOS326 - AUGUST 2005 Dual, Variable Gain Amplifier Features D INDEPENDENT CHANNEL CONTROLS: - Gain Range: 48d B - Clamping Levels - Post-Gain: 0, +6d B DESCRIPTION The VCA2617 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-d B response, the VCA2617 gain can be varied over a 48d B 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 - 10d B to 38d B, or - 16d B to 32d B, 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 52m W per channel. It is available in a small QFN-32 package (5x5mm). D D D D D D D D LOW NOISE: 4.1n V//Hz LOW POWER: 52m W/Channel BANDWIDTH: 50MHz HARMONIC DISTORTION: - 53d Bc at 5MHz CROSSTALK: - 61d B at 5MHz 5V SINGLE SUPPLY POWER-DOWN MODE SMALL QFN-32 PACKAGE (5x5mm) APPLICATIONS D MEDICAL AND INDUSTRIAL ULTRASOUND D D SYSTEMS - Suitable for 10-Bit and 12-Bit Systems TEST EQUIPMENT SONAR RELATED PRODUCTS PART NUMBER VCA2615 DESCRIPTION Dual, Low-Noise, Variable-Gain Amplifier with Preamp V CNTLA V CLMPA Gain Select A C EXTA In A+ V- I In A- Clamping Circuitry I- V Out A+ Out...