VCA2616

Features: `LOW-NOISE PREAMP: Low Input Noise: 0.95nV/Hz Active Termination Noise Reduction Switchable Termination Value 80MHz Bandwidth 5dB to 25dB Gain Differential In and Out`LOW-NOISE VARIABLE GAIN AMPLIFIER: Low-Noise VCA Up to 40dB Gain Range 40MHz Bandwidth Differential In and Out`...

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SeekIC No. : 004540757 Detail

VCA2616: Features: `LOW-NOISE PREAMP: Low Input Noise: 0.95nV/Hz Active Termination Noise Reduction Switchable Termination Value 80MHz Bandwidth 5dB to 25dB Gain Differential In and Out`LOW-NOISE VARIA...

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Part Number:
VCA2616
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/3/27

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Product Details

Description



Features:

` LOW-NOISE PREAMP:
  Low Input Noise: 0.95nV/Hz
  Active Termination Noise Reduction
  Switchable Termination Value
  80MHz Bandwidth
  5dB to 25dB Gain
  Differential In and Out
` LOW-NOISE VARIABLE GAIN AMPLIFIER:
  Low-Noise VCA
  Up to 40dB Gain Range
  40MHz Bandwidth
  Differential In and Out
` LOW CROSSTALK: 66dB at Max Gain, 5MHz
` HIGH-SPEED VARIABLE GAIN ADJUST
` SWITCHABLE EXTERNAL PROCESSING



Application

· ULTRASOUND SYSTEMS
· WIRELESS RECEIVERS
· TEST EQUIPMENT



Pinout

  Connection Diagram


Specifications

Power Supply (+VS) ................................................................................. +6V
VCA2616 Analog Input ................................................ 0.3V to (+VS + 0.3V)
VCA2611 Analog Input ................................................ 2.0V to (+VS + 0.3V)
Logic Input .................................................................. 0.3V to (+VS + 0.3V)
Case Temperature ............................................................................ +100°C
Junction Temperature ....................................................................... +150°C
Storage Temperature ...................................................... 40°C to +150°C




Description

The VCA2616 and VCA2611 are dual, Low-Noise Preamplifiers (LNP), plus low-noise Variable Gain Amplifiers (VGA). The VCA2611 is an upgraded version of the VCA2616. The only difference between the VCA2616 and the VCA2611 is the input structure to the LNP. The VCA2616 is limited to 0.3V negativegoing input spikes; the VCA2611 is limited to 2.0V negativegoing input spikes. This change allows the user to use slower and less expensive input clamping diodes prior to the LNP input. In some designs, input clamping may not be required.

The combination of Active Termination (AT) and Maximum Gain Select (MGS) allow for the best noise performance. The VCA2616 and VCA2611 also feature low crosstalk and outstanding distortion performance.

The VCA2616 LNP has differential input and output capability and is strappable for gains of 5dB, 17dB, 22dB, or 25dB. Low input impedance is achieved by AT, resulting in as much as a 4.6dB improvement in noise figure over conventional shunt termination. The termination value can also be switched to accommodate different sources. The output of the LNP is available for external signal processing.The variable gain is controlled by an analog voltage whose gain varies from 0dB to the gain set by the MGS. The ability to program the variable gain also allows the user to optimize dynamic range. The VCA input can be switched from the LNP to external circuits for different applications. The output can be used in either a single-ended or differential mode to drive highperformance Analog-to-Digital (A/D) converters, and is cleanly limited for optimum overdrive recovery.

The combination of low noise, gain, and gain range programmability makes the VCA2616 and VCA2611 versatile building blocks in a number of applications where noise performance is critical. The VCA2616 and VCA2611 are available in a TQFP-48 package.




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