TI’s ADS9219 is a two-channel, 18-bit, 20MSPS per channel successive approximation register (SAR) analog-to-digital converter (ADC) with integrated ADC driver and voltage reference in a 5 mm-by-5 mm QFN package. The device is the industry’s highest speed, highest precision two-channel ADC, and improves digital control-loop latency and accuracy while reducing design complexity. It achieves the industry’s highest sampling rate, 20MSPS, combined with the SAR architecture’s zero-cycle latency, provides 50ns latency to help achieve faster feedback and control in high-resolution control-loop test & measurement applications.
The ADS9219 uses simultaneous sampling to monitor and control voltage and current in systems designed to accurately monitor and control vital electrical parameters, including current, voltage and power. For example in the following two use cases:
• Automated semiconductor testers need high-channel density with high speed at a certain level of accuracy. Data acquisition equipment requires very high speeds to capture the signals, and high-end linear encoders that use sine and cosine control require accurate simultaneous sampling ADCs to enable precise control. The ADS9219 can help design engineers build top-tier systems with reduced size and improved operating accuracy, minimizing the required calibrations and downtime in end equipment.
• High-speed data acquisition systems require a wide-bandwidth, alias-free precision signal chain to measure the outputs of high-frequency sensors, such as undamped accelerometers or wide-bandwidth current transducers. A high-speed precision ADC is required in order to capture fast transient signals accurately over a wide dynamic range.
Data acquisition systems need an ADC around 20MSPS to accurately capture the wide variety of signals they may experience. The ADS9219 offers a 95dB signal-to-noise ratio at 20MSPS. An integrated ADC driver eases the bandwidth requirement of the front-end amplifier. This enhancement enables data acquisition systems to deliver both precision and wide bandwidth.
Supplementary
• Technical article: How to monitor automated testers and encoders
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