Add to Signal Chain Designer

ADA4691-4:  Low Power, 3.6 MHz, Low Noise, Rail-to-Rail Output, Quad Op Amp

Product Details

Product Status:Recommended for New Designs

The ADA4691-4 is a quad rail-to-rail output, single-supply amplifier featuring low power, wide bandwidth, and low noise. The ADA4691-4 has two independent shutdown pins, allowing further reduction in supply current. These amplifiers are ideal for a wide variety of applications. Audio preamps, filters, IR/photodiode amplifiers, charge amps, and high impedance sensors all benefit from this combination of performance features. The ADA4692-4 is a quad version without shutdown in a 14-lead TSSOP package.

Applications for these amplifiers include consumer audio personal players with low noise and low distortion that provide enough gain and slew rate response over the audio band at low power. Industrial applications with high impedance sensors, such as pyroelectric sensors and other IR sensors, benefit from the high impedance input, low offset drift, and enough band-width and response for low gain applications.

The ADA4691-4 is specified over the extended industrial temperature range (−40°C to +125°C). The ADA4691-4 is available in a 16-lead LFCSP packages.

  • Photodiode amplifier
  • Sensor amplifier
  • Portable instrumentation
  • Portable medical devices
  • Portable audio: MP3, PDA, smart phone, notebook
  • Headphone speaker driver
  • Communications
  • Low-side current sense
  • ADC driver
  • Active filter
  • Sample-and-hold
  • Automotive sensors


  • Low power: 180 μA typical
  • Low distortion: 0.003% THD + N
  • Low noise: 16 nV/√Hz typical
  • 3.6 MHz bandwidth
  • Offset voltage: 500 μV typical
  • Low offset voltage drift: 4 μV/°C maximum
  • Very low input bias currents: 0.5 pA typical
  • 2.7 V to 5 V single supply or ±1.35 V to ±2.5 V dual supply
  • Available in small 3 mm × 3mm LFCSP packages

Pin Configuration for ADA4691-4


Title Content Type File Type
Low Power, 3.6 MHz, Low Noise, Rail-to-Rail Output, Operational Amplifiers (Rev D, 11/2010) (pdf, 699 kB) Data Sheets PDF
Low Power Amplifiers Overview HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary 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.

SampleSample & Buy

Price, packaging, availability

ADA4691-4 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.

EVAL-OPAMP-4 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-PRAOPAMP-4RUZ Status: Production QUAD 14-Lead TSSOP Evaluation Board $20.19 Yes -
EVAL-PRAOPAMP-4RZ Status: Production QUAD R-14 lead SOIC Evaluation Board $20.19 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.

Check Inventory & Purchase

View Sales and Distribution Offices

content here.
content here.

Review this Product