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