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AD8336:  General-Purpose, −55°C to +125°C, Wide Bandwidth, DC-Coupled VGA

Product Details

Product Status:Recommended for New Designs

The AD8336 is a low noise, single-ended, linear-in-dB, general-purpose variable gain amplifier, usable over a large range of supply voltages. It features an uncommitted preamplifier (preamp) with a usable gain range of 6 dB to 26 dB established by external resistors in the classical manner. The VGA gain range is 0 dB to 60 dB, and its absolute gain limits are −26 dB to +34 dB. When the preamplifier gain is adjusted for 12 dB, the combined 3 dB bandwidth of the preamp and VGA is 100 MHz, and the amplifier is fully usable to 80 MHz. With ±5 V supplies, the maximum output swing is 7 V p-p.

Thanks to its X-Amp® architecture, excellent bandwidth uniformity is maintained across the entire gain range of the VGA. Intended for a broad spectrum of applications, the differential gain control interface provides precise linear-in-dB gain scaling of 50 dB/V over the temperature span of −55°C to +125 °C. The differential gain control is easy to interface with a variety of external circuits within the common-mode voltage limits of the AD8336.

The large supply voltage range makes the AD8336 particularly suited for industrial medical applications and for video circuits. Dual-supply operation enables bipolar input signals, such as those generated by photodiodes or photomultiplier tubes.

The fully independent voltage feedback preamp allows both inverting and noninverting gain topologies, making it a fully bipolar VGA. The AD8336 can be used within the specified gain range of −14 dB to +60 dB by selecting a preamp gain between 6 dB and 26 dB and choosing appropriate feedback resistors. For the nominal preamp gain of 4×, the overall gain range is −14 dB to +46 dB.

In critical applications, the quiescent power can be reduced by about half by using the power adjust pin, PWRA. This is especially useful when operating with high supply voltages of up to ±12 V, or at high temperatures.

The operating temperature range is −55°C to +125°C. The AD8336 is available in a 16-lead LFCSP (4 mm × 4 mm).

Applications

  • Industrial process controls
  • High performance AGC systems
  • I/Q signal processing
  • Video
  • Industrial and medical ultrasound
  • Radar receivers

FEATURES and BENEFITS

  • Low noise
    Voltage noise = 3 nV/√Hz
    Current noise = 3 pA/√Hz
  • Small signal BW: 115 MHz
  • Large signal BW: 2 V p-p = 80 MHz
  • Slew rate: 550 V/μs, 2 V p-p
  • Gain ranges (specified)
    −14 dB to +46 dB, 0 dB to 60 dB
  • Gain scaling: 50 dB/V
  • DC coupled
  • Temperature Range: −55°C to +125°C Power
    150 mW @ ±3 V, −55°C < T < +125°C
    84 mW @ ±3 V, PWRA = 3 V

Functional Block Diagram for AD8336

Documentation

Title Content Type File Type
AD8336: General-Purpose, −55°C to +125°C, Wide Bandwidth, DC-Coupled VGA Data Sheet (Rev C, 05/2011) (pdf, 1409 kB) Data Sheets PDF
AN-934: 60 dB Wide Dynamic Range, Low Frequency AGC Circuit Using a Single VGA  (pdf, 317 kB) Application Notes PDF
Variable Gain Amplifier Selection Table  (pdf, 68 kB) Product Selection Guide PDF
AD8336: VGA Delivers High Bandwidth/Gain With Industrial Rail Capability  (htm)
(AnalogZONE, 7/17/2006)
Product Reviews HTM
RF Source Booklet  (PDF, 4353 kB)
RF IC Product Overview - Version P (02/2014)
Overview PDF
Leading Inside Advertorials: Solving Dynamic Range Problems in Analog Systems  (pdf, 75 kB) Overview PDF
RAQs index Rarely Asked Questions HTML
What are Variable Gain Amplifiers (VGA's) and how are they used? FAQs/RAQs HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD8336 SPICE Macro Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

AD8336 Model Options
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

AD8336 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8336-EVALZ Status: Production Evaluation Board $91.03 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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