MAX145AEUA

Analog To Digital Converters (ADC) Overview

The MAX145AEUA+ is a low-power, 12-bit analog-to-digital converter (ADC) utilizing successive-approximation register (SAR) architecture. It features a single pseudo-differential input channel and operates on a single supply voltage ranging from +2.7V to +5.25V. The device integrates an internal clock and track-and-hold circuitry, supporting a maximum sampling rate of 108ksps with a conversion time of 7.4µs. Power consumption is 3.2mW at full speed, dropping to 0.2µA in shutdown mode. 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 µMAX package and is rated for an operating temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Single-supply operation with integrated track-and-hold and automatic power-down capabilities
• Pseudo-differential input configuration optimized for noise rejection
• Flexible 3-wire serial interface compatible with standard microprocessor protocols
• Compact 8-pin surface-mount packaging designed for space-constrained applications

Analog To Digital Converters (ADC) Applications

• Battery-powered portable systems requiring extended operational life
• Portable data logging equipment
• Isolated data acquisition modules
• Process-control monitoring circuits
• Medical instrumentation devices

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'EUA' confirms the -40°C to +85°C industrial temperature grade and µMAX package variant. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure external reference voltage stability requirements are met to maintain specified accuracy levels during operation.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single pseudo-differential channel is required rather than dual single-ended inputs. Verify that the source impedance remains below 1kΩ or implement appropriate filtering to ensure accurate acquisition times. Consider the external reference voltage constraints and available serial interface speeds when designing the system architecture.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MAX144/MAX145 family of low-power ADCs. While pin-compatible with the MAX144, which offers two single-ended channels, the MAX145 provides a single pseudo-differential channel. It shares architectural similarities with other Maxim Integrated SAR converters but is distinct in its specific input multiplexing configuration and package options.

Analog To Digital Converters (ADC) Replacement Considerations

For pin-compatible alternatives with different resolution, consult the MAX157 and MAX159 datasheets. These devices offer 10-bit resolution while maintaining the same package footprint and interface compatibility.