This ADC output 16 times to hit the 90-dB SNR target. Needed, which in turn allows one to have noisier individual conversions and thusĭramatically smaller sampling capacitance. It isįast in the precision ADC category to enable more ADC output averaging where In 55-nm CMOS that addresses these issues, which was first reported in. The work presented here describes a precision SAR ADC Furthermore, most of themĪre in older processes like 0.18 µm, which is not ideal for SoC chips due to their Precision SAR ADCs aforementioned cannot meet the needs due to their largeįootprint, difficulty to drive, and high cost of testing. To reduce overall system cost, as well as to improve system performance, the Lastly, they employ off-chip linearityĬalibration - which takes significant test time and entails extra cost.Īs system-on-a-chip (SoC) solutions are gaining more popularity in an effort
Team z motor plate with adc driver#
Than 20 pF to achieve more than 90-dB SNR, which may require more power in theĪDC driver than the ADC itself. In addition, these ADCs typically have a sampling capacitance larger Up the operation, at the cost of added design complexity and a high accuracyĪmplifier. They use 2-bit/trial and the pipelined SAR architecture, to speed A few works, have pushed the speedįurther. Typically, precision SAR ADCs, , which are generally defined at 16-bit and (OSR) is allowed, and SAR ADCs do not require much signal post-processing. Incremental sigma-delta ADCs especially when only lower oversampling ratio Furthermore, SAR ADCs better handle multiplexed inputs compared to Themselves with the capability of converting one sample at a time, among Compared to sigma-deltaĪDCs, which are also well suited in the low speed space, SAR ADCs distinguish Instrumentation, to industrial process control, etc. They find many applications ranging from medical imaging, One of the performance spaces that SAR ADCs excel at is high resolution at Where reduced supply voltage translates to much lower opamp output swingĭue to fixed circuit overhead voltage drop, which leads to much decreased ADC This is unlike the opamps in pipelined ADCs or sigma-delta ADCs Supply voltage scaling in advanced CMOS processes has less of a toll on SAR ADCsīecause the comparator only requires a small output swing to distinguish decisionsįrom noise. More power efficient and easier to port between processes. To hardware reuse without requiring operational amplifiers (opamps) makes it Successive approximation register (SAR) ADCs have gained considerable research Fernando, Ned Guthrie, Baozhen Chen, Mark Maddox, Nikhil Mascarenhas, Ron Kapusta, and A 16-bit 16-MS/s SAR ADC With On-Chip Calibration in 55-nm CMOS
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