MAX1497EPI+

ADCs/DACs - Special Purpose Overview

The MAX1497EPI+ is a low-power, single-chip analog-to-digital converter (ADC) with integrated multiplexed LED drivers and microcontroller interface. It provides 3.5-digit resolution (±1999 counts) using a sigma-delta architecture. The device operates from a single 2.7V to 5.25V supply and includes an internal charge pump for negative supply generation. Key electrical parameters include selectable input ranges of ±200mV or ±2V, an internal 2.048V reference, and >100dB rejection of 50Hz/60Hz line noise. It features automatic offset calibration, data hold, peak detection, and overrange/underrange detection.

ADCs/DACs - Special Purpose Feature Summary

• 3.5-digit (±1999 count) sigma-delta ADC with selectable ±200mV or ±2V input ranges
• Integrated multiplexed LED display driver with resistor-programmable segment current
• Internal high-accuracy oscillator and 2.048V voltage reference requiring no external components
• SPI/QSPI/MICROWIRE-compatible serial interface for microcontroller communication

ADCs/DACs - Special Purpose Applications

• Digital panel meters
• Hand-held meters
• Digital voltmeters
• Digital multimeters

ADCs/DACs - Special Purpose Procurement Notes

Verify the component status as the source documentation indicates this part number may be classified as future product or subject to availability constraints. Confirm the specific package type matches the required design, as the MAX1497 family is available in SSOP and PDIP packages. Ensure compliance with the specified operating temperature range of -40°C to +85°C for the intended application environment.

ADCs/DACs - Special Purpose Selection Notes

Select the MAX1497EPI+ when 3.5-digit resolution is sufficient for the measurement task. Choose this part over the MAX1499 if lower power consumption or reduced pin count is prioritized, noting that the MAX1499 offers 4.5-digit resolution and additional features like low-battery monitoring. Ensure the application can accommodate the 28-pin PDIP package dimensions and thermal requirements.

ADCs/DACs - Special Purpose Part Context

The MAX1497EPI+ belongs to the MAX1497/MAX1499 family of single-chip ADCs. While the MAX1499 provides 4.5-digit resolution in a 32-pin TQFP package, the MAX1497 offers 3.5-digit resolution. The 'E' suffix denotes the extended industrial temperature range (-40°C to +85°C), and 'PI' indicates the 28-pin PDIP package configuration.

ADCs/DACs - Special Purpose Replacement Considerations

The MAX1497EAI* is listed as a future product variant in the same package family but with SSOP packaging. Direct replacement requires verifying pin compatibility and ensuring the target application supports the specific package footprint differences between PDIP and SSOP variants.