Integrated Analog Front-end Simplifies Sensor Interfaces

NORWOOD, Mass. — (BUSINESS WIRE) — May 12, 2015Analog Devices, Inc. today introduced a FET input AFE with an integrated ADC driver designed to interface directly with current mode sensors such as photo diodes and high output impedance voltage sensors. The ADA4350 integrates a FET input amplifier, switching network and ADC driver into a single package, which simplifies design and lowers power and PCB footprint by more than 50 percent compared to discrete implementations.

The ADA4350 features low-noise performance at low frequencies of 90nV/√Hz at 10 Hz and broadband noise of 5 nV/√Hz at 100 kHz to maximize the signal-to-noise ratio of the sensor output. Wide dynamic range measurement for small, sensitive signals such as photons or electrons is enabled with the inclusion of integrated gain switching. The on-chip programmability of the ADA4350 allows designers to select external, optimized feedback components. With one chip, a single-ended or differential sensor current or voltage signal can be transformed to a high-speed, low-noise, single-ended or differential-output voltage.

In analytical measurement applications, light may need to be monitored over many decades of intensity. This requires a variety of gain switching networks that often incorporate multiple external amplifiers and analog switches, which increases the potential for system errors. The ADA4350 integrates the switching networks and input amplifier to minimize leakage and allow the switching network to select up to six externally configurable feedback networks. In test and measurement systems, the same high measurement accuracy must be maintained across the gain levels as the user adjusts the input range of the instrument. For measuring a wider dynamic range, the ADA4350 is an ideal choice because of its high-impedance/low-Ib input amplifier and serial port-controlled switch network. The device also reduces PCB footprint while significantly increasing channel count without thermal density restrictions.

ADA4350 FET Input AFE Features

  • Low noise, low input bias current FET input amplifier
    • 90nV/√Hz at 10 Hz
    • 5nV/√Hz at 100 Hz
  • Integrated gain switching
    • Switch leakage ± 1pA typ
  • Integrated analog to digital converter driver
    • Differential and single-ended mode

Pricing, Availability and Complementary Components

 
Product      

Production
Availability

     

Price Each In
1,000 Quantities

      Packaging
ADA4350       NOW       $5.73       28-lead TSSOP
                 

1 | 2  Next Page »



Review Article Be the first to review this article
Aldec

Try our TCB Experts

Featured Video
Jobs
Staff Engineer Digital-20003075 for Northrop Grumman Mission Systems at Redondo Beach, California
Senior Analog Design Engineers #5337 for EDA Careers at EAST COAST, California
Senior and (less) Senior Design Verification Engineers for EDA Careers at San Jose and Austin, California
Senior Account Managers… FORMAL VERIFICATION...VALLEY for EDA Careers at San Jose, California
Principal Circuit Design Engineer for Rambus at Chapel Hill, North Carolina
Senior Layout Engineer for EDA Careers at EAST COAST, California
Upcoming Events
Embedded Vision Summit 2020 at Santa Clara Convention Center Santa Clara CA - May 18 - 21, 2020
Sensors Expo & Conference at McEnery Convention Center 150 W. San Carlos Street SAN JOSE CA - Jun 22 - 24, 2020
Nanotech 2020 Conference and Expo at National Harbor MD - Jun 29 - 1, 2020
IEEE Computer Society Annual Symposium on VLSI (ISVLSI) 2020 at Limassol Hotel, Amathus Area, Pareklisia Cyprus - Jul 6 - 8, 2020



© 2020 Internet Business Systems, Inc.
25 North 14th Steet, Suite 710, San Jose, CA 95112
+1 (408) 882-6554 — Contact Us, or visit our other sites:
AECCafe - Architectural Design and Engineering TechJobsCafe - Technical Jobs and Resumes GISCafe - Geographical Information Services  MCADCafe - Mechanical Design and Engineering ShareCG - Share Computer Graphic (CG) Animation, 3D Art and 3D Models
  Privacy PolicyAdvertise