MAX145ACUA+

Analog To Digital Converters (ADC) Overview

The MAX145ACUA+ 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 +2.7V to +5.25V supply. The device achieves 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 includes an internal track-and-hold circuit and communicates via a 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols.

Analog To Digital Converters (ADC) Feature Summary

• Single pseudo-differential input channel for differential signal acquisition
• Integrated track-and-hold circuitry with automatic power-down capability
• Flexible 3-wire serial interface supporting multiple standard protocols

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the component marking against official manufacturer documentation to confirm authenticity. Ensure the ordering suffix matches the required temperature range and package type. Confirm RoHS compliance status through the supplier's declaration. Validate that the specific part number corresponds to the exact pinout and electrical specifications required for the design.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single pseudo-differential input is required rather than dual single-ended channels. Verify that the external reference voltage meets the current sourcing requirements during conversion cycles. Ensure the source impedance allows for adequate acquisition time within the specified sampling rate constraints.

Analog To Digital Converters (ADC) Part Context

This device belongs to the MAX144/MAX145 family of low-power ADCs. While the MAX144 variant provides two single-ended channels, the MAX145 specifically offers one pseudo-differential channel. Both share identical SAR architecture, power characteristics, and packaging options within the 8-pin µMAX format.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible alternatives include the MAX144 series for single-ended applications or the MAX157 and MAX159 for 10-bit resolution requirements. Verify interface compatibility and power specifications before substituting.