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

EMA:

Featured Video
Editorial
Peggy AycinenaWhat Would Joe Do?
by Peggy Aycinena
Retail Therapy: Jump starting Black Friday
Peggy AycinenaIP Showcase
by Peggy Aycinena
REUSE 2016: Addressing the Four Freedoms
More Editorial  
Jobs
Principal Circuit Design Engineer for Rambus at Sunnyvale, CA
ACCOUNT MANAGER MUNICH GERMANY EU for EDA Careers at MUNICH, Germany
Development Engineer-WEB SKILLS +++ for EDA Careers at North Valley, CA
FAE FIELD APPLICATIONS SAN DIEGO for EDA Careers at San Diego, CA
Manager, Field Applications Engineering for Real Intent at Sunnyvale, CA
AE-APPS SUPPORT/TMM for EDA Careers at San Jose-SOCAL-AZ, CA
Upcoming Events
Zuken Innovation World 2017, April 24 - 26, 2017, Hilton Head Marriott Resort & Spa in Hilton Head Island, SC at Hilton Head Marriott Resort & Spa Hilton Head Island NC - Apr 24 - 26, 2017
CST Webinar Series



Internet Business Systems © 2016 Internet Business Systems, Inc.
595 Millich Dr., Suite 216, Campbell, CA 95008
+1 (408)-337-6870 — 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 Policy