公开(公告)号：US20150249458A1

公开(公告)日：2015-09-03

申请号：US14193669

申请日：2014-02-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Cormac HARRINGTON ,  Ken MOUSHEGIAN ,  Andrew ALLEMAN

IPC: H03M1/10 ,  H03M1/12

CPC classification number: H03M1/1004 ,  H03M1/1033 ,  H03M1/109 ,  H03M1/1095 ,  H03M1/12 ,  H03M1/1245

Abstract: A method for testing linearity of an ADC, comprising receiving a trigger signal indicating an ADC input voltage step adjustment, reading an ADC output sample upon receiving the trigger signal, wherein the ADC output sample has a value range of N integer values that correspond to N discrete ADC output codes, computing a histogram of code occurrences for M consecutive ADC output codes, wherein the histogram comprises M number of bins corresponding to the M consecutive ADC output codes, and wherein M is less than N, updating a DNL value and an INL value according to the histogram at an interval of K number of ADC output sample readings, and shifting the histogram by one ADC output code after updating the DNL and the INL values.

Abstract translation: 一种用于测试ADC的线性度的方法，包括接收指示ADC输入电压阶跃调整的触发信号，在接收到所述触发信号时读取ADC输出采样，其中所述ADC输出采样具有对应于N的N个整数值的值范围 离散ADC输出代码，计算M个连续ADC输出代码的代码发生的直方图，其中所述直方图包括M个对应于M个连续ADC输出代码的仓，并且其中M小于N，更新DNL值和INL 根据直方图的值，以K个ADC输出采样读数的间隔，并在更新DNL和INL值之后将直方图移位一个ADC输出代码。