About Ksps (A/D conversion rate Unit) __ Circuit knowledge

Kilo samples per Second represents a sampling of thousands of times a second, which is the unit of conversion rate.

The so-called conversion rate (conversion Rate) refers to the reciprocal of the time required to complete an ad conversion from analog to digital. The conversion time of the integrated ad is in the millisecond of low velocity ad, the successive comparison ad is the microsecond level of the medium-speed ad, the full parallel/string parallel ad can reach the nanosecond level. The sampling time is another concept, which refers to the interval of two conversions. To ensure the correct completion of the conversion, the sample rate (sample Rate) must be less than or equal to the conversion rate. It is therefore customary to accept that the conversion rate is equivalent to the sampling rate in numerical terms. Common units are Ksps and MSPs, which means that samples per second are sampled/million (Kilo/million samples/Second).

1msps=1000ksps

Throughput Rate is called the output rate, or throughput rate, conversion rate. The term "conversion rate" has some data expressed in conversion Rate, some of which are expressed in throughput Rate or T-put Rate. When choosing an ad conversion chip, we should consider the number of in-place, conversion speed, output mode and so on. The number of digits is easy to understand and is determined by resolution. A complete conversion process takes the Analog-to-digital conversion time, the rest time, the next conversion preparation time, and so on, which constitute a complete conversion cycle. For example, Adi production of AD7610, the conversion cycle of 4us, that is, the first conversion after the start of the 4us can be the next conversion. The conversion rate is the reciprocal of the conversion cycle, representing the maximum number of complete samples per second, thus determining the upper limit of the sampling frequency. From the point of view of the chip-makers, the number of bits n is determined according to the accuracy of the data acquisition, and the lowest sampling frequency f is determined according to the highest frequency of the signal and Shannon's theorem. Then select an n-bit, throughput rate > Sampling frequency of the ad chip, of course, depending on the other requirements of the specific choice.