MAX1280BCUP+T

Analog To Digital Converters (ADC) Overview

The MAX1280BCUP+T is a 12-bit successive-approximation analog-to-digital converter (ADC) housed in a 20-pin TSSOP package. It operates from a single +4.5V to +5.5V supply and features an integrated 8-channel analog-input multiplexer with a high-bandwidth track/hold circuit. The device supports a sampling rate of 400ksps and utilizes a 4-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols. Key electrical specifications include a signal-to-noise plus distortion ratio (SINAD) of 70dB, integral nonlinearity (INL) of ±1 LSB, and differential nonlinearity (DNL) of ±1 LSB. It includes an internal +2.5V reference and offers multiple software-selectable power modes.

Analog To Digital Converters (ADC) Feature Summary

• Integrates an 8-channel analog multiplexer and track/hold circuitry for efficient multi-point data acquisition.
• Features a flexible 4-wire serial interface that connects directly to standard microprocessor protocols without external logic.
• Includes an internal +2.5V voltage reference with a buffer amplifier capable of ±1.5% adjustment.
• Provides four software-selectable power modes to optimize current consumption based on application requirements.

Analog To Digital Converters (ADC) Applications

• Portable Data Logging Systems
• Industrial Data Acquisition
• Medical Instruments
• Battery-Powered Instruments
• Process Control

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix BCUP against the manufacturer's official documentation to confirm the temperature range and lead-free status. Ensure the ordering code matches the exact pin configuration and package type required for the design. Cross-reference the component with the latest datasheet revision to confirm availability and any potential obsolescence notices before finalizing procurement plans.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution and 400ksps sampling rate are required within a single-supply architecture. The internal multiplexer reduces external component count for multi-channel applications. Verify that the source impedance of the analog inputs remains below 2kΩ to maintain AC performance specifications. Ensure the system clock frequency aligns with the specified 6.4MHz limit for optimal conversion timing.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MAX1280/MAX1281 family of low-power, serial 12-bit ADCs. It serves as a higher-speed alternative to the MAX146/MAX147 series. The MAX1280 variant specifically targets +5V systems, distinguishing it from the MAX1281 which operates at lower voltages. Both share identical pinouts and functional architectures, differing primarily in supply voltage ranges and maximum clock speeds.

Analog To Digital Converters (ADC) Replacement Considerations

Direct replacements within the same family include the MAX1280BEUP+ for extended temperature ranges. For lower voltage applications, the MAX1281BCUP+T is functionally similar but requires a +2.7V to +3.6V supply. Verify pin compatibility and software register configurations when substituting these variants.