MAX147AEAP

Analog To Digital Converters (ADC) Overview

The MAX147AEAP is a 12-bit, 8-channel serial analog-to-digital converter (ADC) from the MAX146/MAX147 family. It operates on a single +2.7V to +5.25V supply and features an internal track/hold circuit with a high-bandwidth input. The device utilizes a successive-approximation conversion technique and communicates via a 4-wire serial interface compatible with SPI, QSPI, Microwire, and TMS320 DSPs. Analog inputs are software-configurable for unipolar or bipolar operation in either single-ended or differential modes. Unlike the MAX146, the MAX147 requires an external reference voltage applied to the VREF pin.

Analog To Digital Converters (ADC) Feature Summary

• Software-selectable unipolar/bipolar and single-ended/differential input configurations
• Flexible 4-wire serial interface supporting multiple standard protocols without external logic
• Integrated track/hold circuitry with programmable power-down modes for low current consumption
• Reference-buffer amplifier with adjustable voltage range

Analog To Digital Converters (ADC) Applications

• Portable data logging systems
• Battery-powered instruments
• Medical instrumentation
• Process control applications

Analog To Digital Converters (ADC) Procurement Notes

Verify that the specific ordering suffix 'AEAP' corresponds to the intended temperature grade and package configuration. Confirm that the design includes the necessary external reference voltage source, as this variant does not contain an internal reference generator. Ensure the host microcontroller supports the required serial clock frequencies and timing constraints for reliable data acquisition.

Analog To Digital Converters (ADC) Selection Notes

Select the MAX147 over the MAX146 when an external precision reference is preferred or already available in the system architecture. This component is suitable for designs requiring 8 channels of 12-bit resolution with low power consumption. Verify that the application environment falls within the specified operating temperature range for the 'A' grade designation.

Analog To Digital Converters (ADC) Part Context

This component belongs to the MAX146/MAX147 series of low-power, serial 12-bit ADCs manufactured by Maxim Integrated (now part of Analog Devices). The series provides a compact solution for multi-channel data acquisition in space-constrained environments. The MAX147 variant specifically distinguishes itself by relying on an external reference, offering flexibility in reference selection compared to the internally referenced MAX146.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX146 serves as a functional alternative if an internal reference is acceptable and the supply voltage remains within the +3.6V maximum limit. For higher channel counts, consider the MAX1246/MAX1247 family which offers 4-channel versions.