| PGA/VGA | VGA |
| Number of channels (#) | 2 |
| BW @ Acl (MHz) | 50 |
| Vs (Max) (V) | 5.25 |
| Vs (Min) (V) | 4.75 |
| Acl, min spec gain (V/V) | 0.32 |
| Gain (Max) (dB) | 48 |
| Slew rate (Typ) (V/us) | 100 |
| Operating temperature range (C) | -40 to 85 |
| Features | Shutdown, Analog Gain Set, Digital Gain Set, Integrated Clamps |
- INDEPENDENT CHANNEL CONTROLS:
- Gain Range: 48dB
- Clamping Levels
- Post-Gain: 0, +6dB
- LOW NOISE: 4.1nV/
Hz - LOW POWER: 52mW/Channel
- BANDWIDTH: 50MHz
- HARMONIC DISTORTION: -53dBc at 5MHz
- CROSSTALK: -61dB at 5MHz
- 5V SINGLE SUPPLY
- POWER-DOWN MODE
- SMALL QFN-32 PACKAGE (5x5mm)
- APPLICATIONS
- MEDICAL AND INDUSTRIAL ULTRASOUND SYSTEMS
- Suitable for 10-Bit and 12-Bit Systems
- TEST EQUIPMENT
- SONAR
- MEDICAL AND INDUSTRIAL ULTRASOUND SYSTEMS
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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-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).