By Frank Ohnhäuser
This ebook bargains scholars and people new to the subject of analog-to-digital converters (ADCs) a huge creation, prior to going into information of the cutting-edge layout suggestions for SAR and DS converters, together with the most recent examine themes, that are helpful for IC layout engineers in addition to clients of ADCs in purposes. The e-book then addresses vital subject matters, comparable to right connectivity of ADCs in an program, the verification, characterization and checking out of ADCs that be sure top quality finish products.
Analog-to-digital converters are the primary aspect in any info processing method and rules loops comparable to modems or electric motor drives. They considerably impact the functionality and backbone of a approach or finish product. method improvement engineers must be acquainted with the functionality parameters of the converters and comprehend the benefits and downsides of a number of the architectures. built-in circuit improvement engineers need to triumph over the matter of attaining excessive functionality and determination with the bottom attainable energy dissipation, whereas the electronic circuitry generates distortion in offer, floor and substrate. This ebook explains the connections and provides feedback for acquiring the top attainable answer. Novel traits are illustrated within the layout of analog-to-digital converters in accordance with successive approximation and the problems within the improvement of continuous-time delta-sigma modulators also are discussed.
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Extra info for Analog-Digital Converters for Industrial Applications Including an Introduction to Digital-Analog Converters
6 V with the third clock edge and compares it with 2 V again, so that the digital output is 1. The total digital output of the ADC is 011. Be aware, that the described example shows a symmetrical transfer function, where the first code transition is one LSB above 0 V. Regarding to the specifications in Sect. 5 LSB below full-scale. The illustrated architecture therefore has an offset error of half an LSB. The example shows that the conversion of the pipeline converter was performed with k comparators/ADCs and k À 1 amplifiers (k ¼ 3).
Additionally, power switches (switchgears) might turn on and off to route the power on the shortest path to the consumer to minimize the energy loss in the grid. Such high power switches, need to disconnect power lines at the right point of time to avoid sparkling in the switch. Similarly they need to connect power lines, when the voltages are in phase. Here an accurate current and voltage measurement is required as well. An overview is shown in Fig. 41. The various applications in the power grid are examined below.
It is important that the output Yout remains deterministic, which means that only one overflow must occur during OSR clock cycles. This will require a minimum register width WR that is dependent on the oversampling ratio OSR and the order of the filter mf. The register width can be calculated with Eq. 23). Fig. 2 Overview of ADCs 35 Fig. 33 Filter responds of a second order SINC filter (10 MHz bit stream, OSR ¼ 32) 0 -10 Gain (dB) -20 -30 -40 -50 -60 -70 -80 0 200 400 600 800 1000 1200 1400 1600 30 35 40 Frequency (kHz) Fig.
Analog-Digital Converters for Industrial Applications Including an Introduction to Digital-Analog Converters by Frank Ohnhäuser