Microwave Journal
www.microwavejournal.com/articles/34831-adi-announces-alias-free-adc-that-enables-increased-functionality-performance-and-ease-of-use
ADI-10-21-20

ADI Announces Alias-Free ADC that Enables Increased Functionality, Performance and Ease of Use

Alias-Free Analog-to-Digital Converter: AD7134

October 21, 2020

Analog Devices, Inc. (ADI) introduced the AD7134 alias-free analog-to-digital converter (ADC) that significantly simplifies front-end design and speeds up time to market for precision DC-350 kHz applications. Traditional precision data-acquisition signal chain design is a time-consuming activity as designers balance anti-alias filter requirements, passive component tolerances, phase and gain errors, as well as high speed ADC drive requirements. The AD7134 introduces a new architecture for precision ADCs that fundamentally changes the design process. The new device removes the need for anti-alias filter, and its resistive input significantly simplifies ADC drive.

The AD7134 is a quad-channel, 24-bit precision ADC with output data rate scalable from 10 SPS to 1.5 MSPS. Inherent anti-aliasing up to 102 dB eliminates the need for an external anti-alias filter, thus requiring 60 fewer passive components and five fewer active components. It also saves 70 percent board area, relative to a typical alternative implementation. Asynchronous sample-rate converter, simplifies multi-device synchronization, enables user to achieve coherent sampling system with ease, and simplifies isolation requirements.

AD7134 Key Features:
•    Alias-Free: inherent anti-alias rejection up to 102.5 dB, typical
•    THD: -120 dB typical (ideal for AC, vibration or acoustic measurements)
•    108 dB dynamic range (at ODR = 374kSPS)
•    Multiple linear phase digital filter options (SINC6 for low latency, FIR for passband flatness)
•    Offset error drift: 0.7uV/°C typical
•    Gain drift: 2 ppm/°C typical

Pricing and Availability

Product

Full

Production

 

Price Each Per 1,000

Packaging

AD7134

NOW

$17.85

56-Lead LFCSP (8 mm x 8 mm)