24bit Sigma-Delta ADC削减了足迹

December 06, 2021//尼克·弗莱厄蒂(Nick Flaherty)
24bit Sigma-Delta ADC削减了足迹
The ADS127L11 24bit delta-sigma ADC from TI has data rates up to 400 kSPS using the wideband filter and up to 1067 kSPS using the low-latency filter in a 3 x 3mm WQFN package

Texas Instruments (TI) has launched a 24bit wideband analog-to-digital converter (ADC) that it says I the smallest in the industry

在3 x 3毫米四flat No-Lead(WQFN)软件包中,ADS127L11 Delta-Sigma(δς)ADC是先前设备的一半,具有功耗,分辨率和测量带宽,可针对广泛的工业系统进行优化。

The ADS127L11 has data rates up to 400 kSPS using the wideband filter and up to 1067 kSPS using the low-latency filter. It integrates input and reference buffers to reduce signal loading and a low-drift modulator provides DC precision with low in-band noise.

该数字过滤器可用于宽带或低[1]延迟操作,可在一个设备中优化宽带AC性能或DC信号的数据吞吐量。该串行接口具有雏菊链能力,可通过隔离屏障和输出数据和寄​​存器设置来减少SPI I/O,并通过循环降值检查(CRC)功能验证,以增强操作可靠性。

在低延迟模式下,ADS12711在数据采集和条件监测应用程序中,可在1,067 ksps和83.3较低的偏移漂移中降低25%的延迟。

Until now, miniaturized, battery-powered industrial equipment designers had to choose between an ADC’s size and measurement precision at higher frequencies.

The ADS127L11 consumes 18.6 mW in high-speed mode or 3.3 mW in the low power mode with sampling rates up to 50 kSPS, improving signal resolution and battery life for designs such as portable electroencephalogram (EEG) machines and power-quality analyzers to better optimize power consumption against bandwidth requirements using the device’s power-scalable modes.

"There is a clear trend toward smaller solution size and lower power consumption in applications such as test and measurement equipment and portable medical devices, where improved battery life is imperative," said Noman Akhtar, senior research analyst, Omdia. "There is an urgency to provide increased data throughput, higher bandwidth and lower power, all in a smaller footprint."

The device is fully specified for operation over the –40°C to +125°C temperature range.

TheADS127L11可在Ti.com上购买,并配备20针,3毫米by-3毫米WQFN软件包或20针,6.5毫米by-4.4毫米薄薄的Shinink Shillink Small-Outline套件(tssop)。定价起价为5.75美元,数量为1,000单位。评估模块可在Ti.com上以149.00美元的价格提供。

www.ti.com

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