The VCA2617 is a dual channel variable gain amplifier in a smaller package

The VCA2617 is a dual-channel, continuously variable, APT10045JLL voltage-controlled gain amplifier ideal for a variety of ultrasound systems and applications in proximity detectors and test equipment. The VCA2617 uses a true variable gain amplifier architecture to achieve very good noise performance at low gain without sacrificing high gain distortion performance.

After a linear dB response, the VCA2617 gain can be varied within 48dB with a control voltage of 0.2V to 2.3V. Two independent high-impedance control inputs allow channel-independent changes in gain. 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 the VCA2617 for a variety of high-speed analog-to-digital converters (ADCs). As a way to improve system overload recovery time, the VCA2617 also provides an internal clamp circuit where an externally applied voltage sets the desired output clamp level.

The VCA2617 operates from a single +5V supply and consumes only 52mW per channel. It is available in a small QFN-32 package (5x5mm).

characteristic:

●Independent channel control:

○Gain range: 48dB

○ Clamp level

○ Post gain: 0, +6dB

●Low noise: 4.1nV/Hz

●Low power consumption: 52mW/channel

●Bandwidth: 50MHz

●Harmonic distortion: -53dBc at 5MHz

●Crosstalk: -61dB at 5MHz

●5V single power supply

●Power-down mode

●Small QFN-32 package (5x5mm)

●Application:

○ Medical and Industrial Ultrasound Systems

■Available on 10-bit and 12-bit systems

○ Quiz Equipment

○Sonar

parameter:

PGA/VGA: VGA

Number of channels (#): 2

Bandwidth@Acl (MHz): 50

VS (max) (V): 5.25

VS (min) (V): 4.75

Acl, Minimum 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 Setting, Digital Gain Setting, Integrated Clamp