MAX1272CPA+

ADCs/DACs - Special Purpose Overview

The MAX1272CPA+ is a multirange, 12-bit data-acquisition system (DAS) operating from a single 5V supply. It features software-programmable analog input ranges including ±10V, ±5V, 0 to 10V, and 0 to 5V, with fault protection up to ±12V on the analog input. The device integrates a 5MHz track/hold circuit and achieves an 87ksps throughput rate. It supports SPI/QSPI/MICROWIRE-compatible serial interfaces and includes four software-selectable power-down modes for low-power operation. The internal reference provides 4.096V, or an external reference between 2.40V and 4.18V can be used.

ADCs/DACs - Special Purpose Feature Summary

• 12-bit resolution with no missing codes and ±1 LSB INL
• Software-selectable input ranges: ±10V, ±5V, 0-10V, 0-5V (MAX1272)
• ±12V fault-protected analog input
• 87ksps throughput rate with 5MHz T/H bandwidth
• Four programmable power-down modes

ADCs/DACs - Special Purpose Applications

• Industrial Control Systems
• Data-Acquisition Systems
• Robotics
• Automatic Testing
• Medical Instruments

ADCs/DACs - Special Purpose Procurement Notes

Verify the package type matches the specific suffix requirements, as the datasheet lists the EUA+ package variant. Confirm that the + suffix indicates lead-free and RoHS compliance status for the specific manufacturing batch. Ensure the ordering information aligns with the required temperature range of -40°C to +85°C.

ADCs/DACs - Special Purpose Selection Notes

Select the MAX1272 variant if ±12V fault protection is required for the analog input. Choose between internal or external reference based on precision needs; the internal reference settles in 2ms after full power-down. Ensure the source impedance is less than 4Ω to minimize gain error. Verify SPI clock polarity and phase settings match CPOL=0 and CPHA=0.

ADCs/DACs - Special Purpose Part Context

The MAX1272CPA+ belongs to the MAX1272/MAX1273 family of multirange ADCs. While the provided datasheet primarily details the EUA+ package version, the CPA+ designation typically indicates a PDIP package variant within the same functional family. Both devices share identical electrical characteristics and pinouts, differing mainly in physical packaging.

ADCs/DACs - Special Purpose Replacement Considerations

The MAX1273EUA+ is a compatible alternative within the same series but lacks the ±12V fault protection found in the MAX1272. When substituting, verify that the analog input voltage limits do not exceed ±6V for the MAX1273 variant.