MAX1494CCJ+

ADCs/DACs - Special Purpose Overview

The MAX1494CCJ+ is a low-power, single-chip analog-to-digital converter (ADC) with integrated liquid crystal display (LCD) drivers. It provides 4.5-digit resolution (±19,999 counts) using sigma-delta architecture. The device operates from a single 2.7V to 5.25V supply and includes an internal 2.048V reference, high-accuracy oscillator, and charge pump for negative supply generation. It features selectable input ranges of ±2V or ±200mV, SPI/QSPI/MICROWIRE-compatible serial interface, and >100dB simultaneous 50Hz/60Hz line noise rejection. Packaged in a 32-pin LQFP.

ADCs/DACs - Special Purpose Feature Summary

• 4.5-Digit Resolution: Provides ±19,999 count output capability.
• Integrated LCD Driver: Triplexed driver supports up to 4.5-digit displays with 3 backplanes.
• Sigma-Delta Architecture: Eliminates need for external integrating or autozeroing capacitors.
• Internal Components: Includes internal 2.048V reference, oscillator, and charge pump.

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 material indicates potential discontinuation or end-of-life notifications for related family members. Confirm RoHS compliance via the specific datasheet revision. Ensure the ordering suffix matches the required package type, as the base model number may correspond to different packages.

ADCs/DACs - Special Purpose Selection Notes

Select the MAX1494CCJ+ when 4.5-digit resolution is required. Choose this part over the MAX1492 if higher precision counts are needed. Verify that the application requires a triplexed LCD driver integration. Ensure the power supply voltage falls within the 2.7V to 5.25V range.

ADCs/DACs - Special Purpose Part Context

The MAX1494CCJ+ belongs to the MAX1492/MAX1494 family of single-chip ADCs with LCD drivers. The 'CCJ+' suffix denotes the commercial temperature range (0°C to +70°C) and the 32-pin LQFP package. The '+' indicates lead-free/RoHS-compliant packaging. This family replaces traditional dual-slope ADCs by integrating necessary support circuitry on-chip.

ADCs/DACs - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. The MAX1492 is a lower-resolution variant within the same family but does not offer equivalent performance for 4.5-digit applications.