MAX1249AEEE+T

Number of A/D Converters:	1
Base Part Number:	MAX1249
Supplier Device Package:	16-QSOP
Package / Case:	16-SSOP (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C
Features:	--
Voltage - Supply, Digital:	2.7 V ~ 5.25 V
Voltage - Supply, Analog:	2.7 V ~ 5.25 V
Reference Type:	External
Architecture:	SAR
Series:	--
Ratio - S/H:ADC:	1:1
Configuration:	MUX-S/H-ADC
Data Interface:	SPI
Input Type:	Differential, Single Ended
Number of Inputs:	2, 4
Sampling Rate (Per Second):	133k
Number of Bits:	10
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

Analog to Digital Converters (ADC) are circuits that allow the conversion of analog signals into digital data. It allows for digital representation of real-world physical quantities for display and analysis. The MAX1249AEEE+T is application field and working principle of one such ADC and is a versatile mixed-signal analog signal-processing chip. It is an application-specific integrated circuit (ASIC) that helps in signal conditioning and analog-to-digital conversion. This paper will provide an overview of the data acquisition – analog to digital converter (ADC) applications of the MAX1249AEEE+T, and discuss its working principle.

Applications

The MAX1249AEEE+T provides an economical way to acquire data from analog sources such as sensors. It is designed to address the analog signal-processing needs of various applications, such as automated meter reading (AMR), wireless mesh networking, flow/pressure/level/temperature/position measurement, and environmental monitoring. Additionally, its unique features allow it to process signals even from very high impedance sources. The MAX1249AEEE+T also finds uses in converting transient signals such as pressure, temperature or voltage into a digital format for storage or analysis. It can be used for multiplexing, or for switching and processing analog signals from multiple sources.

Working Principle

The MAX1249AEEE+T operates using an automatic gain control technique to adjust the output of on-chip programmable gain amplifier (PGA) dynamically. The PGA adjusts the signal level to increase the signal-to-noise ratio of the sensed signal. The amplifier of MAX1249AEEE+T also has a low-impedance input configuration that can support up to 32Kohm.The MAX1249AEEE+T also contains an 18-bit sigma-delta analog-to-digital converter with a nominal resolution of 17 bits. It has a full-scale range of ±10V and a sample rate up to 200kHz. The digital data is output from the ADC as a serial differential signal. The digital output of the MAX1249AEEE+T complies with the I²C interface standard, allowing for easy connection to external devices for data processing.

Conclusion

The MAX1249AEEE+T is a versatile mixed-signal analog signal-processing chip with a range of applications. It can be used for analog-to-digital conversion, data acquisition, and conditioning of analog signals from various sources. With its on-chip amplifier and 18-bit sigma-delta ADC, the MAX1249AEEE+T is an efficient and cost-effective way to acquire data from analog sources.

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