MAX189AEPA

Analog To Digital Converters (ADC) Overview

The MAX189AEPA+ is a +5V, low-power, 12-bit serial analog-to-digital converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply and accepts a 0 to VREF analog input range. The device features an internal track/hold circuit with a 75ksps throughput rate and utilizes a successive-approximation register (SAR) architecture. Unlike the MAX187, the MAX189 requires an external reference voltage applied to the REF pin. It communicates via a high-speed 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols. The component is housed in an 8-pin PDIP package and supports an operating temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with ±½ LSB integral nonlinearity for precision data acquisition
• Internal track/hold circuitry enabling a 75kHz sampling rate without external hold capacitors
• Low power consumption with 1.5mA operating current and 2µA shutdown current
• 3-wire serial interface compatible with standard microprocessor communication protocols

Analog To Digital Converters (ADC) Applications

• Portable data logging systems
• Remote digital signal processing applications
• Isolated data acquisition circuits
• High-accuracy process control instrumentation

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix 'EPA+' against the manufacturer's official documentation to confirm the package type, temperature grade, and lead-free status. Confirm availability status as the component may be subject to discontinuation or limited supply constraints. Ensure compatibility with existing PCB footprints for the 8-pin PDIP configuration during procurement planning.

Analog To Digital Converters (ADC) Selection Notes

Select the MAX189AEPA+ when an external precision voltage reference is required rather than an internal one. This model is suitable for designs needing 12-bit accuracy at 75ksps with minimal power consumption. Verify that the system can provide the necessary external reference voltage within the specified input range. Consider the 8-pin PDIP package constraints for through-hole assembly requirements.

Analog To Digital Converters (ADC) Part Context

The MAX189 is part of the MAX187/MAX189 family of low-power serial ADCs. While sharing identical performance characteristics regarding resolution and speed, it differs from the MAX187 by requiring an external reference voltage. Both devices utilize the same SAR architecture and serial interface, offering flexibility in system design where reference sourcing strategies vary.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.