The AD8139 is an ultralow noise, high performance differential amplifier with rail-to-rail output. With its low noise, high SFDR, and wide bandwidth, it is an ideal choice for driving ADCs with resolutions to 18 bits. The AD8139 is easy to apply, and its internal common-mode feedback architecture allows its output common-mode voltage to be controlled by the voltage applied to one pin. The internal feedback loop also provides outstanding output balance as well as suppression of even-order harmonic distortion products. Fully differential and single-ended-to-differential gain configurations are easily realized by the AD8139. Simple external feedback networks consisting of four resistors determine the closed-loop gain of the amplifier.
The AD8139 is manufactured on the Analog Devices, Inc. proprietary, second-generation XFCB process, enabling it to achieve low levels of distortion with input voltage noise of only 2.25 nV/√Hz.
The AD8139 is available in an 8-lead SOIC package with an exposed paddle (EP) on the underside of its body and a 3 mm × 3 mm LFCSP. It is rated to operate over the temperature range of −40°C to +125°C.
Data Sheet, Rev. B, 10/07
Analog Devices introduces the next generation of Differential Amplifiers, these new amplifiers offer higher performance and lower power consumption than previous devices. Also new in this category, is each of these devices are offered as dual amplifiers, which simplifies designs and reduces board area.
|Title||Content Type||File Type|
|AD8139:Low Noise, Rail-to-Rail, Differential ADC Driver Data Sheet (Rev B, 10/2007) (pdf, 678 kB)||Data Sheets|
|AN-1026: High Speed Differential ADC Driver Design Considerations (pdf, 355 kB)||Application Notes|
|AN-0992: Active Filter Evaluation Board for Differential Amplifiers (pdf, 85 kB)||Application Notes|
|AN-649: Using the Analog Devices Active Filter Design Tool (pdf, 5301 kB)||Application Notes|
AN-584: Using the AD813X Differential Amplifier
(pdf, 174 kB)
The AD813x differs from conventional op amps by the external presence of an additional input and output. The additional input, VOGM, controls the output common mode voltage.
|MT-218: Multiple Feedback Band-Pass Design Example (pdf, 0)||Tutorials|
|MT-076: Differential Driver Analysis (pdf, 95 kB)||Tutorials|
|MT-075: Differential Drivers for High Speed ADCs Overview (pdf, 183 kB)||Tutorials|
A Stress-Free Method for Choosing High-Speed Op Amps
A decision-tree approach to making the critical decision about high-speed op amp selection, including a look at some helpful tools.
|UG-474: Evaluation Board for Differential Amplifiers Offered in 8-Lead SOIC Packages (PDF, 263 kB)||User Guides|
|UG-190: Differential Amplifier Evaluation Board for Single 8-lead LFCSP Packages (pdf, 278 kB)||User Guides|
|UG-130: Differential Amplifier Evaluation Board for 8-lead SOIC and MSOP Packages (pdf, 493 kB)||User Guides|
Ask The Application Engineer 36, Wideband A/D Converter Front-End Design Considerations II: Amplifier-or Transformer Drive for the ADC?
(Analog Dialogue, Volume 41 February 2007)
"Rules of the Road" for High-Speed Differential ADC Drivers
(Analog Dialogue, Vol. 43, No. 5, 2009)
AD8139/AD8137: Differential Amplifiers For ADC Driving
(analogZONE, June 7,2004)
|High Speed Amplifiers Selection Table (pdf, 77 kB)||Product Selection Guide|
|RAQs index||Rarely Asked Questions||HTML|
|Glossary of EE Terms||Glossary||HTML|
|Title||Content Type||File Type|
ADI's new ADI DiffAmpCalc is a free, downloadable calculator for designing differential amplifier circuits. The tool is easy to use and features an interactive user interface to quickly get you up and running.
|ADIsim Design/Simulation Tools||HTML|
|AD8139 SPICE Macro Model||SPICE Models||HTML|
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.