ADC12H038CIWMX

Analog To Digital Converters (ADC) Overview

The ADC12H038CIWMX is a self-calibrating 12-bit plus sign serial I/O Analog-to-Digital Converter (ADC) featuring an 8-channel multiplexer and sample/hold function. It operates on a single +5V supply with power consumption of 33 mW maximum. The device supports differential, pseudo-differential, or single-ended inputs via configurable MUXOUT pins. Key specifications include a maximum conversion time of 5.5 µs and throughput of 8.6 µs at an 8 MHz clock. It utilizes a MICROWIRE-compatible serial interface for data exchange.

Analog To Digital Converters (ADC) Feature Summary

• Self-calibrating architecture adjusts linearity, zero, and full-scale errors to less than ±1 LSB.
• 8-channel analog input multiplexer supporting differential, pseudo-differential, or single-ended configurations.
• MICROWIRE-compatible serial I/O interface with programmable acquisition time and output word length.
• Single +5V supply operation with low power down current of 100 µW typical.

Analog To Digital Converters (ADC) Applications

• Medical instruments
• Process control systems
• Test equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify component availability status as the datasheet notes some devices in this family may be obsolete or on Lifetime Buy status. Confirm package type (SOIC-28) and temperature range (-40°C to +85°C) match design requirements. Ensure separate bypassing for VA+ and VD+ pins to maintain accuracy.

Analog To Digital Converters (ADC) Selection Notes

Select the ADC12H038 variant over the ADC12038 family for higher speed performance, as the H-series supports an 8 MHz clock compared to 5 MHz. Ensure the application requires an 8-channel multiplexer. Verify that the system can accommodate the variable resolution and conversion rate settings via serial commands.

Analog To Digital Converters (ADC) Part Context

This component belongs to the ADC12(H)03x family of 12-bit plus sign SAR ADCs. The 'H' designation indicates support for higher clock frequencies (up to 8 MHz) compared to the standard '0' series (5 MHz). The '8' suffix denotes the 8-channel multiplexer configuration. It shares architectural similarities with the ADC12030, ADC12032, and ADC12034 models.

Analog To Digital Converters (ADC) Replacement Considerations

Direct replacement options within the same family include ADC12038CIWMX/NOPB, though it operates at a lower 5 MHz clock speed. Other family members like ADC12H034 (4-channel) or ADC12H032 (2-channel) are available but have different channel counts. Check for RoHS-compliant NOPB versions if environmental compliance is required.

Analog To Digital Converters (ADC) FAQ

What is the maximum conversion clock frequency for the ADC12H038?

The ADC12H038 supports a maximum conversion clock (CCLK) frequency of 8 MHz.

How does the self-calibration feature affect accuracy?

The self-calibration process adjusts linearity, zero, and full-scale errors to less than ±1 LSB each, ensuring high precision without external adjustment components.

Can the ADC12H038 handle negative input voltages?

Yes, in differential modes, valid outputs are obtained even when negative inputs are greater than positive inputs due to the 12-bit plus sign output data format.