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 »
Featured Video
Jobs
CAD Engineer for Nvidia at Santa Clara, California
Senior Firmware Architect - Server Manageability for Nvidia at Santa Clara, California
Sr. Silicon Design Engineer for AMD at Santa Clara, California
Design Verification Engineer for Blockwork IT at Milpitas, California
GPU Design Verification Engineer for AMD at Santa Clara, California
Senior Platform Software Engineer, AI Server - GPU for Nvidia at Santa Clara, California
Upcoming Events
Phil Kaufman Award Ceremony and Banquet to be held November 6 at Hayes Mansion at Hayes Mansion 200 Edenvale Ave San Jose CA - Nov 6, 2024
SEMICON Europa 2024 at Messe München München Germany - Nov 12 - 15, 2024
DVCon Europe 2023 at Holiday Inn Munich – City Centre Munich Germany - Nov 14 - 15, 2024
SEMI MEMS & Imaging Sensors Summit, at International Conference Center Munich Germany - Nov 14, 2024



© 2024 Internet Business Systems, Inc.
670 Aberdeen Way, Milpitas, CA 95035
+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