MAX1189ACUI+

Number of A/D Converters:	1
Base Part Number:	MAX1189
Supplier Device Package:	28-TSSOP
Package / Case:	28-TSSOP (0.173", 4.40mm Width)
Operating Temperature:	0°C ~ 70°C
Features:	--
Voltage - Supply, Digital:	2.7 V ~ 5.25 V
Voltage - Supply, Analog:	5V
Reference Type:	External, Internal
Architecture:	SAR
Series:	--
Ratio - S/H:ADC:	1:1
Configuration:	S/H-ADC
Data Interface:	Parallel
Input Type:	Single Ended
Number of Inputs:	1
Sampling Rate (Per Second):	135k
Number of Bits:	16
Part Status:	Active
Packaging:	Tube

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Data Acquisition - Analog to Digital Converters (ADC)The MAX1189ACUI+ is an analog-to-digital (ADC) converter targeted especially at portable and battery-powered applications. An important feature of the ADC is its low-power operational mode that explains its suitability for portable environments. It uses successive approximation register (SAR) architecture and 24-bit Sigma-Delta (ΔΣ) analog-to-digital conversion technique.

Applications

The MAX1189ACUI+ is suitable for data acquisition applications that require extreme accuracy and high resolution, such as medical imaging, instrumentation, and communication devices. Where portability of the application hardware is required, the low-power operation mode of the ADC makes it an attractive choice. It is also used in industrial automation and home security systems to measure analog signals such as temperature and pressure.

Working Principle

The MAX1189ACUI+ works on a successive approximation register (SAR) architecture, which is conversions method that is better suited for low-power operation. In the successive approximation technique, it uses an internal reference voltage to compare the input signal. The SAR code is iteratively updated, and the correction is applied each time to eventually stabilize the ADC output.The ADC has 24-bits of resolution and consumes a maximum of only 180 µA, so it is a great solution for portable applications. Its input range is 0 – 10V, and the conversion range can be either 2’s complement or offset binary formats. The ADC converts analog data from an external source and converts it into a digital signal, which can then be used by an external system for further processing.The ADC also contains an on-chip oscillator and an on-chip voltage regulator. The oscillator can be used to sample analog signals at a predefinedrate. The microprocessor or external system can then be used to configure the ADC and control the conversion process. The on-chip voltage regulator helps maintain a constant voltage across the input signal range, which helps ensure accurate, consistent conversions.

Conclusion

The MAX1189ACUI+ is an analog-to-digital (ADC) converter targeted especially at portable and battery-powered applications. It uses successive approximation register (SAR) architecture and a 24-bit Sigma-Delta (ΔΣ) analog-to-digital conversion technique for low-power operation and precision results. The ADC also contains an on-chip oscillator and an on-chip voltage regulator. It can be used in a variety of applications, including medical imaging, instrumentation, communication devices, industrial automation, and home security.

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