You will see with these devices we might mention they have a 24-bit ADC (as that is what people look and search for), but we try not to call them "24-bit" and try to stick with the effective resolution. The U6-Pro and T7-Pro provide some of the best performance around from a 24-bit ADC, and they do about 22 bits effective or 20 bits error-free. If you look at a device called "24-bit" just because it has a converter that returns 24-bits of data per sample, you will find that it typically provides 20 bits effective or 18 bits error-free (like the UE9-Pro). What we like to do, is provide actual measured data that tells you the resolution of a device including typical inherent noise. It is hard to simply state "the resolution" of a given device. The simple fact that a converter returns 16-bits says little about the quality of those bits. When an ADC chip returns 16 bits, it is probably better than a 12-bit converter, but not always. When you see analog input DAQ devices from various manufacturers called 12-bit, 16-bit, or 24-bit, it generally just means they have an ADC (analog to digital converter) that returns that many bits. What does it mean to say a device is 12-bit, 16-bit, or 24-bit? The bit conversion calculator is basically a tool that helps you convert. This gives a voltage resolution of 20/4096 or 0.00488 volts per bit (4.88 mV/bit). You can use the options to control image resolution, quality and file size. In the case of the LabJack U12, a single-ended analog input has a voltage range of -10 volts to +10 volts (20 volt total span) and returns a 12-bit value. Low voltages give a 0 and high voltages give a 1. It might occur to you at this point that a digital input could be thought of as a 1-bit analog to digital converter. A 16-bit digital value can represent 65536 (2 16) different numbers. A 12-bit digital value can represent 4096 (2 12) different numbers. ![]() A 3-bit digital value can represent 8 (2 3) different numbers. The resolution of the converter indicates the number of discrete values it can produce over the range of analog values. The resolution of an A/D converter (ADC) is specified in bits. So in this example, the 2-bit digital value can represent 4 different numbers, and the voltage input range of 0 to 10 volts is divided into 4 pieces giving a voltage resolution of 2.5 volts per bit. Answer (1 of 4): Analog-to-Digital Converter resolution is used to describe or measure the performance of an ADC. Here is how the Resolution of DAC or ADC calculation can be explained with given input values -> 0.5 7.5/ (2 (4)-1). This device will give digital values as follows: Voltage To use this online calculator for Resolution of DAC or ADC, enter Maximum Voltage (Vmax) & Bits for Digital Encoding (n) and hit the calculate button. ![]() Now, say you have a device which converts an analog voltage between 0 and 10 volts into a 2-bit digital value for storage in a computer. If you are storing a digital 2-bit number you can store 4 different values: 00, 01, 10, or 11. ![]() A computer is a digital machine and thus stores a number as a series of ones and zeroes. Resolution in this context refers to the conversion of an analog voltage to a digital value in a computer (and vice versa).
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