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Analog Devices' 24-bit sigma-delta A/D converter achieves twice the speed of competing converters and industry's best noise performance
Analog Devices has introduced a multiplexed 24-bit sigma-delta A/D converter that doubles the throughput rate of alternative sigma-delta converters while dissipating less power.
Designed for process automation and instrumentation systems where data channel density is increasing and channels must be monitored faster, ADI’s new AD7176-2 A/D converter achieves a 50 kSPS (thousand samples per second) multi-channel scan rate.
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.
- Download data sheet, view product page and access ADI’s Circuits from the Lab™ reference circuits: http://www.analog.com/AD7176-2
- Learn more about designing with the sigma-delta converter architecture through this interactive tutorial: http://designtools.analog.com/dt/sdtutorial/sdtutorial.html
- Get support at ADI’s EngineerZone™, an online technical support community: http://ez.analog.com/community/data_converters/precision_adcs
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
- Supplied in a 24-lead TSSOP package
Complementary Products
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.
For more information, or details on the full range of Analog Devices products available from Anglia, please email info@anglia.com
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This news article was originally published in May 2013.
