MAX149ACPP

Analog To Digital Converters (ADC) Overview

The MAX149ACPP+ is a low-power, 8-channel, serial 10-bit analog-to-digital converter (ADC) in a 20-pin PDIP package. It operates from a single +2.7V to +5.25V supply and samples at up to 133ksps. The device integrates an internal 2.5V reference with a buffer amplifier offering ±1.5% adjustment range. Analog inputs are software-configurable for unipolar/bipolar and single-ended/differential operation. It features a 4-wire serial interface compatible with SPI/QSPI/MICROWIRE/TMS320. Key electrical parameters include ±0.5 LSB INL, ±1 LSB DNL, 1.2mA operating current at 3V, and a shutdown current under 60µA.

Analog To Digital Converters (ADC) Feature Summary

• Integrates an 8-channel multiplexer, high-bandwidth track/hold circuit, and successive-approximation ADC core.
• Features a software-selectable power-down mode that reduces supply current significantly between conversions.
• Includes an internal 2.5V reference with a buffer amplifier for external voltage adjustment.
• Provides a hard-wired shutdown pin and a serial-strobe output for direct DSP connection.

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 the specific suffix 'CPP+' indicates a lead-free/RoHS-compliant 20-pin PDIP package. Confirm the temperature range corresponds to the 'A' grade specification of 0°C to +70°C. Ensure the ordering code matches the exact manufacturer part number to guarantee correct pinout and electrical characteristics.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an 8-channel ADC with integrated reference and low power consumption is required. Compare against the MAX148 if an external reference is preferred or if bipolar input ranges are needed without internal buffering constraints. Verify that the serial interface timing meets the host processor's clock polarity and phase requirements.

Analog To Digital Converters (ADC) Part Context

This device belongs to the MAX148/MAX149 family of low-power serial ADCs. It shares architectural similarities with the MAX1248/MAX1249 but offers eight channels instead of four. The MAX149 variant distinguishes itself by including an internal reference, whereas the MAX148 requires an external one.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.