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ADL5561:  2.9 GHz Ultralow Distortion RF/IF Differential Amplifier

Product Details

Product Status:Recommended for New Designs

The ADL5561 is a high performance differential amplifier optimized for RF and IF applications. The amplifier offers low noise of 2.1 nV/√Hz and excellent distortion performance over a wide frequency range, making it an ideal driver for high speed 8-bit to 16-bit analog-to-digital converters (ADCs).

The ADL5561 provides three gain levels of 6 dB, 12 dB, and 15.5 dB through a pin-strappable configuration. For the single-ended input configuration, the gains are reduced to 5.6 dB, 11.1 dB, and 14.1 dB. Using an external series input resistor expands the amplifier gain flexibility and allows for any gain selection from 0 dB to 15.5 dB.

The quiescent current of the ADL5561 is typically 40 mA and, when disabled, consumes less than 3 mA, offering excellent input-to-output isolation.

The device is optimized for wideband, low distortion performance. These attributes, together with its adjustable gain capability, make this device the amplifier of choice for general-purpose IF and broadband applications where low distortion, noise, and power are critical. This device is optimized for the best combination of slew speed, bandwidth, and broadband distortion. These attributes allow it to drive a wide variety of ADCs and make it ideally suited for driving mixers, pin diode attenuators, SAW filters, and multi-element discrete devices.

Fabricated on the Analog Devices, Inc., high speed SiGe process, the ADL5561 is supplied in a compact 3 mm × 3 mm, 16-lead LFCSP package and operates over the temperature range of −40°C to +85°C.


  • Differential ADC drivers
  • Single-ended-to-differential conversion
  • RF/IF gain blocks
  • SAW filter interfacing


  • −3 dB bandwidth of 2.9 GHz (AV = 6 dB)
  • Low supply current: 40 mA
  • Pin-strappable gain adjust: 6 dB, 12 dB, 15.5 dB
  • Differential or single-ended input to differential output
  • Low noise input stage: 2.1 nV/√Hz RTI at AV = 12 dB
  • IMD3s of -86 dBc @ 250 MHz center
  • Slew rate: 9.8 V/ns
  • Fast settling of 2 ns and overdrive recovery of 3 ns
  • Low broadband distortion (AV = 6 dB)
      10 MHz: −94 dBc HD2, −87 dBc HD3
      70 MHz: −98 dBc HD2, −87 dBc HD3
      140 MHz: −95 dBc HD2, −87 dBc HD3
      250 MHz: −80 dBc HD2, −73 dBc HD3
  • Single-supply operation: 3 V to 3.6 V
  • Power-down control
  • Fabricated using the high speed XFCB3 SiGe process

ADL5561 Functional Block Diagram


Title Content Type File Type
ADL5561: 2.9 GHz Ultralow Distortion RF/IF Differential Amplifier Data Sheet (Rev F, 01/2014) (pdf, 265 kB) Data Sheets PDF
AN-1098: Methodology for Narrow-Band Interface Design Between High Performance Differential Driver Amplifiers and ADCs  (pdf, 167 kB) Application Notes PDF
The Differential-signal Advantage for Communications System Design
Understand how differential signal chains and architectures can improve system performance in challenging applications.
(RF Designline, 2/1/2010)
Technical Articles HTML
RF Source Booklet  (PDF, 4353 kB)
RF IC Product Overview - Version P (02/2014)
Overview PDF
ADC Drivers Overview HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADI’s ADIsimRF design tool provides calculations for the most important parameters within the RF signal chain, including cascaded gain, noise figure, IP3, P1dB, and total power consumption.
ADIsim Design/Simulation Tools HTML
ADIsimPLL™- Version 3.60.10
ADIsimPLL enables the rapid and reliable evaluation of new high performance PLL products from ADI. It is the most comprehensive PLL Synthesizer design and simulation tool available today. Simulations performed include all key non-linear effects that are significant in affecting PLL performance. ADIsimPLL removes at least one iteration from the design process, thereby speeding the design- to-market.
ADIsim Design/Simulation Tools HTML
ADL5561 S-Parameters  (zip, 180 kB) S-Parameters ZIP

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

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.

ADL5561 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
ADL5561-EVALZ Status: Production Evaluation Board $100.19 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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