Add to Signal Chain Designer

OP275:  Bipolar/JFET, Audio Dual Op Amp

Product Details


Newer Alternatives:
  • ADA4075-2 with greatly improved noise, lower offset and much lower quiescent power in narrow 8-lead SOIC and tiny 2mm x 2mm LFCSP packages

The OP275 is the first amplifier to feature the Butler Amplifier front-end. This new front-end design combines both bipolar and JFET transistors to attain amplifiers with the accuracy and low noise performance of bipolar transistors, and the speed and sound quality of JFET's. Total Harmonic Distortion plus Noise equals that of previous audio amplifiers, but at much lower supply currents.

A very low l/f corner of below 6 Hz maintains a flat noise density response. Whether noise is measured at either 30 Hz or 1kHz, it is only 6 nV/(root)Hz. The JFET portion of the input stage gives the OP275 its high slew rates to keep distortion low, even when large output swings are required, and the 22 V/µs slew rate of the OP275 is the fastest of any standard audio amplifier. Best of all, this low noise and high speed are accomplished using less than 5mA of supply current, lower than any standard audio amplifier.

Improved dc performance is also provided with bias and offset currents greatly reduced over purely bipolar designs. Input offset voltage is guaranteed at 1mV and is typically less than 200µV. This allows the OP275 to be used in many dc coupled or summing applications without the need for special selections or the added noise of additional offset adjustment circuitry.

The output os capable of driving 600 Ohm loads to 10 V rms while maintaining low distortion. THD + Noise at 3 V rms is a low 0.0006%.

The OP275 is specified over the extended industrial (-40°C to +85°C) temperature range. OP275s are availale in both plastic DIP and SOIC-8 packages. SOIC-8 packages are available in 2500 piece reels. Many audio amplifiers are not offered in SOIC-8 surface mount packages for a variety of reasons; however, the OP275 was designed so that it would offer full performance in surface mount packaging.

FEATURES and BENEFITS

  • Excellent Sonic Characteristics
  • Low Noise: 6 nV/√Hz
  • Low Distortion: 0.0006%
  • High Slew Rate: 22 V/µs
  • Wide Bandwidth: 9 MHz
  • Low Supply Current: 5 mA
  • Low Offset Voltage: 1 mV
  • Low Offset Current: 2 nA
  • Unity Gain Stable
  • SOIC-8 Package
  • PDIP-8 Package

Pin Configuration Diagram for OP275

Documentation

Title Content Type File Type
OP275: Dual Bipolar/JFET, Audio Operational Amplifier Data Sheet (Rev C, 02/2004) (pdf, 416 kB) Data Sheets PDF
AN-940: Low Noise Amplifier Selection Guide for Optimal Noise Performance  (pdf, 199 kB) Application Notes PDF
AN-649: Using the Analog Devices Active Filter Design Tool  (pdf, 5301 kB) Application Notes PDF
AN-356: User's Guide to Applying and Measuring Operational Amplifier Specifications  (pdf, 538 kB) Application Notes PDF
AN-211: The Alexander Current-Feedback Audio Power Amplifier  (pdf, 1154 kB) Application Notes PDF
Ask The Applications Engineer-25
Op Amps Driving Capacitive Loads

(Analog Dialogue, Vol. 31, No. 2, 1997)
Analog Dialogue HTML
Ask The Applications Engineer-13
Confused About Amplifier Distortion Specs?

(Analog Dialogue, 30th Anniversary Reader Bonus)
Analog Dialogue HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
OP275 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.

SampleSample & Buy

Price, packaging, availability

OP275 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
OP275GPZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $1.28 $1.15 Y  Material Info PCN Purchase
OP275GS Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.29 $1.16 N  Material Info Notify Me Purchase
OP275GS-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $1.16 N  Material Info Notify Me Purchase
OP275GS-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $1.16 N  Material Info Notify Me Purchase
OP275GSZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.14 $1.02 Y  Material Info Notify Me Purchase
OP275GSZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $1.02 Y  Material Info Notify Me Purchase
OP275GSZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $1.02 Y  Material Info Notify Me Purchase
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-2 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-PRAOPAMP-2CPZ Status: Production Dual CP-8 lead LFCSP Evaluation Board $20.19 Yes -
EVAL-PRAOPAMP-2RMZ Status: Production Dual RM-8 lead MSOP Evaluation Board $20.19 Yes -
EVAL-PRAOPAMP-2RZ Status: Production Dual R-8 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

沪ICP备09046653号
content here.
content here.

Review this Product

Close