ADI's AD7176-2 ADC Achieves Twice the Speed of Competing Converters

In an automated, high-precision production line, the performance of the AD7176-2 allows for faster manufacturing while achieving the precision, low-input bandwidth signal measurements that are inherently associated with the sigma-delta architecture. Measured on a single channel, the AD7176-2 delivers as many as 17.2 noise-free bits at 250 kSPS and 22 noise-free bits at 5 SPS.

The AD7176-2 A/D converter includes high-precision, on-chip peripherals, including a 2.5-V, ±2.5-ppm/°C reference and ±2.5% internal oscillator that reduce board space and lower bill of materials costs while maintaining high performance. The new converter features flexible on-chip digital filters, which optimise settling, resolution and line frequency rejection. The new converter also can be configured on a per-channel basis allowing for different filter and output data rates as well as per-channel offset and gain error correction.

AD7176-2 24-bit Sigma-Delta A/D Converter Key Features:

•5-SPS to 250-kSPS output rate for fast and flexible updates
•17.2 noise free bits at 250 kSPS for more accurate measurements
•Up to 90-dB 50-Hz and 60-Hz line frequency rejection using enhanced 50-Hz and 60-Hz rejection filters
• 7.8-mA total current consumption

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Pricing, Availability and Complementary Products

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The AD7176-2 can be designed into circuits together with ADI’s single-supply, low-noise, low-offset AD8656 CMOS amplifier and single supply, attenuating input stage, AD8475 differential driver.