Model: MAX1300AEUG

Manufacturer: Maxim Integrated

Product Category: Analog to Digital Converter - ADC

RoHS: Details

Series: MAX1300A

Installation style: SMD/SMT

Package/Case: TSSOP-24

Resolution: 16 bit

Number of channels: 4 Channel/8 Channel

Interface type: SPI

Sampling ratio: 115 kS/s

Input Type: Differential/Single-Ended

Structure: SAR

SNR – Signal to Noise Ratio: 91 dB

Minimum operating temperature: - 40 C

Maximum operating temperature: + 85 C

Package: Tube

Number of Converters: 1 Converter

Brand: Maxim Integrated

Reference type: External, Internal

Development Kit: MAX1300AEVKIT#

Operating Supply Voltage: 4.75 V to 5.25 V

Pd-Power Dissipation: 976 mW

Product Type: ADCs - Analog to Digital Converters

1. What is a/d, d/a conversion:

With the rapid development and popularization of digital technology, especially information technology, in the fields of modern control, communication and detection, in order to improve the performance index of the system, digital computer technology is widely used for signal processing. Since the actual objects of the system are often some analog quantities (such as temperature, pressure, displacement, images, etc.), in order for a computer or digital instrument to recognize and process these signals, these analog signals must first be converted into digital signals; The digital quantities output after analysis and processing often need to be converted into corresponding analog signals before they can be accepted by the actuator. Thus, there is a need for a circuit that can bridge between analog and digital signals—analog-to-digital and digital-to-analog converters.

A circuit that converts an analog signal into a digital signal is called an analog-to-digital converter (abbreviated as a/d converter or adc, analog to digital converter); a circuit that converts a digital signal into an analog signal is called a digital-to-analog converter (abbreviated as d). /a converter or dac, digital to analog converter); a/d converter and d/a converter have become indispensable in information systems. The /d converter and the d/a converter must have sufficient conversion accuracy; if the real-time control and detection of fast-changing signals are to be realized, the a/d and d/a converters also require high conversion speed. Conversion accuracy and conversion speed are important technical indicators to measure a/d and d/a converters. With the development of integrated technology, many monolithic and hybrid integrated a/d and d/a converters have been developed and produced, and they have more and more advanced technical indicators.

2. Relevant performance parameters of d/a and a/d converters:

A d/a converter is a linear circuit device that converts digital quantities into analog quantities, and has been made into integrated chips. Due to the differences in the principle, circuit structure and process technology for realizing this conversion, various d/a converters appear. At present, there are hundreds of products sold in foreign markets, and they all have their own characteristics in conversion speed, conversion accuracy, resolution and use value.

The main parameters of the d/a converter:

The main parameters to measure the performance of a d/a converter are:

(1) Resolution

It refers to the number of bits of binary numbers that the d/a converter can convert, and the higher the number of bits, the higher the resolution.

(2) Conversion time

Refers to the time required for the digital input to complete the conversion and the output to reach its final value and stabilize. The current-mode d/a conversion is faster, generally between several ns and several hundreds of ns. Voltage-based d/a conversions are slower and depend on the op amp's response time.

(3) Accuracy

Refers to the error between the actual output voltage of the d/a converter and the theoretical value. Generally, the least significant bit of the digital quantity is used as the measurement unit.

(4) Linearity

When the digital quantity changes, the degree to which the analog quantity output by the d/a converter changes proportionally. The ideal d/a converter is linear, but there is actually an error, and the maximum value of the analog output deviating from the ideal output is called the linearity error.

The function of a/d converter is to convert analog quantity into digital quantity. Since the working principle and process technology used to realize this conversion are different, a wide variety of a/d conversion chips are produced. A/D converters are divided into 4-bit, 6-bit, 8-bit, 10-bit, 14-bit, 16-bit and 31/2-bit, 51/2-bit of bcd code according to the resolution. According to the conversion speed, it can be divided into ultra-high speed (conversion time≤330ns), sub-super-high speed (330~3.3μs), high speed (conversion time 3.3~333μs), low speed (conversion time>330μs) and so on. According to the conversion principle, a/d converters can be divided into direct a/d converters and indirect a/d converters. The so-called direct a/d converter is to directly convert the analog signal into a digital signal, such as successive approximation type, parallel comparison type and so on. Among them, the successive approximation type a/d converter is easy to be realized by an integrated process, and can achieve higher resolution and speed. Therefore, many integrated a/d chips use the successive approximation type; the indirect a/d converter is the first Convert the analog quantity into an intermediate quantity, and then convert it into a digital quantity, such as voltage/time conversion type (integral type), voltage/frequency conversion type, voltage/pulse width conversion type, etc. Among them, the integral type a/d converter has a simple circuit, strong anti-interference ability, and can achieve high resolution, but the conversion speed is relatively slow. Some converters also integrate multiplexers, reference voltage sources, clock circuits, decoders and conversion circuits in one chip, which has gone beyond the simple a/d conversion function and is very convenient to use.