AD8334

PRODUCTION

Quad VGA with Ultralow Noise Preamplifier and Programmable RIN

Data Sheet (Rev. I) Product Selection Table
Viewing:

Overview

  • Ultralow noise preamplifier (preamp)
    • Voltage noise = 0.74 nV/√Hz
    • Current noise = 2.5 pA/√Hz
  • 3 dB bandwidth: 100 MHz
  • Low power: 145 mW/channel
  • Wide gain range with programmable postamp
    • −4.5 dB to +43.5 dB in LO gain mode
    • 7.5 dB to 55.5 dB in HI gain mode
  • Low output-referred noise: 48 nV/√Hz typical
  • Active input impedance matching
  • Optimized for 10-bit/12-bit ADCs
  • Selectable output clamping level
  • Single 5 V supply operation
  • AD8332 and AD8334 available in lead frame chip scale package

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.

Included in each channel are an ultralow noise preamp (LNA), an X-AMP® VGA with 48 dB of gain range, and a selectable gain postamp with adjustable output limiting. The LNA gain is 19 dB with a single-ended input and differential outputs. Using a single resistor, the LNA input impedance can be adjusted to match a signal source without compromising noise performance.

The 48 dB gain range of the VGA makes these devices suitable for a variety of applications. Excellent bandwidth uniformity is maintained across the entire range. The gain control interface provides precise linear-in-dB scaling of 50 dB/V for control voltages between 40 mV and 1 V. Factory trim ensures excellent part-to-part and channel-to-channel gain matching. Differential signal paths result in superb second- and third-order distortion performance and low crosstalk.

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

For information on specs, see the AD8331/AD8332/AD8334 datasheet.

Applications

  • Ultrasound and sonar time-gain controls
  • High performance automatic gain control (AGC) systems
  • I/Q signal processing
  • High speed, dual ADC drivers
AD8334
Quad VGA with Ultralow Noise Preamplifier and Programmable RIN
AD8334-fbl AD8334 Pin Configuration
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

Application Note 2

Technical Articles 1

Frequently Asked Question 1

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Tools & Simulations

AD8334 SPICE Macro Models 2

Evaluation Kits

EVAL-AD8334

AD8334 Evaluation Board

Buy Now View Details

Product Details

The board is shipped assembled and tested, and users need to only connect the signal and VGAIN sources and a single 5 V power supply.The AD8332-EVALZ is lead free and RoHS compliant.


Refer to AD8334 data sheet for configuring the input impedance and further details.
EVAL-AD8334
AD8334 Evaluation Board

Latest Discussions

2 Years Ago
Multichannel AD8332/AD8334 board design for ultrasonic imaging
3 Years Ago
AD8339 SDP Panel Error 110005
4 Years Ago
AD8339
View related discussion on EngineerZone®

Recently Viewed