AD8334:  Quad VGA with Ultralow Noise Preamplifier and Programmable RIN

The AD8334 is an ultralow noise, quad channel linear-in-dB variable gain amplifier (VGA). Although optimized for ultrasound systems, it may be used as a low noise variable gain control in any ...More

AD8334:  Quad VGA with Ultralow Noise Preamplifier and Programmable RIN

Product Description

The AD8334 is an ultralow noise, quad channel linear-in-dB variable gain amplifier (VGA). Although optimized for ultrasound systems, it may be used as a low noise variable gain control in any application whose operating frequency is less than 100 MHz.

The AD8334 is a quad version of the single AD8331 and dual AD8332.

For more information on specs, please see the AD8332 datasheet.


Applications
  • Ultrasound and Sonar
  • High Performance AGC Systems
  • Low IF Signal Processing
  • High Speed ADC Driver

    • Features

    • Ultralow Input Noise at Maximum Gain
    • Active Termination Match, Selected with an External Resistor
    • Ultra Low Noise LNA Pre-amp
    • Bandwidth: 100 MHz (-3 dB)
    • Wide Gain Range with Programmable
      Post-amp
    • Fully Differential Signal Path after LNA
    • Selectable Output Clamping Level
    • Trimmed for Gain, Offset and Clamping Level
    • Optimized for 10-/12-Bit ADCs
    • Single +5 V Supply

    Diagrams

    AD8334 Diagram
    Functional Block Diagram for AD8334

    Specifications

    Supply Voltage (V) +5V
    Gain Low End (dB) +4.5dB
    Gain High End (dB) +43.5dB
    -3 dB BW (MHz) 100MHz
    Spectral Noise (nV/rtHz) 0.74nV/rtHz
    Gain Accuracy (dB) +0.5dB
    Supply Current (max) 116mA
    Package 64-Lead LFCSP

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    Part# Gain Control -3 dB BW (MHz) Gain Low End (dB) Gain High End (dB) Number of Channels Spectral Noise (nV/rtHz) Supply Voltage (V) Supply Current (max) Gain Accuracy (dB) 1 dB Comp Point (dBm) Package Price* (1000-4999)
    AD600 Analog 35 0 +40 2 1.4 ±5 14mA - - - $16.61
    AD602 Analog 35 -10 +30 2 1.4 ±5 14mA - - - $13.36
    AD603 Analog 90 -11 +31 1 1.4 ±5 20mA ±0.5 - 8-Lead DIP, 8-Lead SOIC $4.40
    AD604 Analog 40 0 +48 2 0.8 ±5 31mA ±0.3 15 24-Lead SOIC, 24-Lead SSOP $16.45
    AD605 Analog 40 -14 +34 2 1.8 +5 23mA ±0.2 15 16-Lead SOIC $9.91
    AD8260 Digital 180 -6 +24 1 2.4 +3.3 28mA +0.25 - - $3.84
    AD8320 Digital 150 -10 +26 1 53 +12 105mA ±0.2 22.5 20-Lead SOIC -
    AD8321 Digital 120 -27.4 +26 1 20 +9 90mA ±1 19.5 20-Lead SOIC $4.40
    AD8322 Digital 180 -12.6 +29.5 1 64 +5 113mA ±2 19 28-Lead TSSOP $3.19
    AD8323 Digital 100 -26 +27.5 1 - +5 - - - 28-Lead TSSOP $3.34
    AD8324 Digital 100 -25.5 +33.5 1 157 +3.3 207mA ±1 21 20-Lead LFCSP, 20-Lead QSOP $1.73
    AD8325 Digital 100 -29.5 +30 1 56 +5 133mA ±1 18.5 28-Lead TSSOP $3.34
    AD8326 Digital 100 -26 +27.5 1 100 ±5