AD8331
Single VGA with Ultralow Noise Preamplifier and Programmable RIN
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Features
- Ultralow noise preamplifier (preamp)
- Voltage noise = 0.74 nV/√Hz
- Current noise = 2.5 pA/√Hz
- 3 dB bandwidth: 120 MHz
- Low power: 125 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
- Download AD8331-EP data sheet (pdf)
- Military Temperature Range: −55°C to +105°C
- Controlled manufacturing baseline
- 1 assembly/test site
- 1 fabrication site
- Product change notification
- Qualification data available on request
- V62/19601-01XE DSCC Drawing Number
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The AD8331 is a single channel, ultralow noise, linear-in-dB, variable gain amplifier (VGA). Optimized for ultrasound systems, it is usable as a low noise variable gain element at frequencies up to 120 MHz.
Included is an ultralow noise preamplifier (LNA), an X-AMP® VGA with 48 dB of gain range, and a selectable gain postamplifier 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 operating temperature range is -40°C to +85°C. The AD8331 is available in a 20-lead QSOP package.
The AD8331 is a single version of the dual AD8332 and quad AD8334.
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
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AD8331
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Data Sheet
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AD8331/AD8332/AD8334: Ultralow Noise VGAs with Preamplifier and Programmable RIN Data Sheet (Rev.I)
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AD8331-EP: Ultralow Noise VGA with Preamplifier and Programmable RIN Enhanced Data Sheet (Rev.0)
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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD8331ARQZ |
20-Lead QSOP
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| AD8331ARQZ-R7 |
20-Lead QSOP
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| AD8331ARQZ-RL |
20-Lead QSOP
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| AD8331TRQZ-EP |
20-Lead QSOP
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| AD8331TRQZ-EP-R7 |
20-Lead QSOP
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- AD8331ARQZ
- Pin/Package Drawing
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20-Lead QSOP
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- AD8331ARQZ-R7
- Pin/Package Drawing
-
20-Lead QSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- AD8331ARQZ-RL
- Pin/Package Drawing
-
20-Lead QSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- AD8331TRQZ-EP
- Pin/Package Drawing
-
20-Lead QSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- AD8331TRQZ-EP-R7
- Pin/Package Drawing
-
20-Lead QSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
Filter by Model
Part Models
Product Lifecycle
PCN
Aug 26, 2010
- 10_0001
Halogen Free Material Change for QSOP Products
AD8331ARQZ
PRODUCTION
AD8331ARQZ-R7
PRODUCTION
AD8331ARQZ-RL
PRODUCTION
Sep 9, 2009
- 07_0083
Polyimide Change
AD8331ARQZ
PRODUCTION
AD8331ARQZ-R7
PRODUCTION
AD8331ARQZ-RL
PRODUCTION
Mar 23, 2009
- 09_0041
ADWIL Fab XFCB2 Front End Manufacturing Change
AD8331ARQZ
PRODUCTION
AD8331ARQZ-R7
PRODUCTION
AD8331ARQZ-RL
PRODUCTION
Filter by Model
Part Models
Product Lifecycle
PCN
Aug 26, 2010
- 10_0001
Halogen Free Material Change for QSOP Products
AD8331ARQZ
PRODUCTION
AD8331ARQZ-R7
PRODUCTION
AD8331ARQZ-RL
PRODUCTION
Sep 9, 2009
- 07_0083
Polyimide Change
AD8331ARQZ
PRODUCTION
AD8331ARQZ-R7
PRODUCTION
AD8331ARQZ-RL
PRODUCTION
Mar 23, 2009
- 09_0041
ADWIL Fab XFCB2 Front End Manufacturing Change
AD8331ARQZ
PRODUCTION
AD8331ARQZ-R7
PRODUCTION
AD8331ARQZ-RL
PRODUCTION
Software & Part Ecosystem
Evaluation Kits 1
EVAL-AD8331
AD8331 Evaluation Board
Product Detail
The board is provided completely assembled and tested; the user simply connects an input signal, VGAIN sources, and a 5 V power supply. The AD8331-EVALZ is lead free and RoHS compliant.
See the AD8331 data sheet available on line for user-supplied optional components, board layout and further details.
Resources
Evaluation Kits1
Tools & Simulations 1
SPICE Model 2
SPICE Model
