LTC1403AHMSE#PBF

Analog To Digital Converters (ADC) Overview

The LTC1403AHMSE#PBF is a 14-bit, 2.8Msps serial analog-to-digital converter (ADC) from Analog Devices Inc., housed in a 10-lead MSOP package. It operates on a single 3V supply with active power dissipation of 12mW and features a Sleep shutdown mode reducing consumption to 10µW. The device accepts differential or single-ended inputs within a 0V to 2.5V range and includes an internal 2.5V bandgap reference. Key performance metrics include a typical SINAD of 73.5dB at 100kHz input, SFDR of 90dB, and THD of -90dB. It supports a 3-wire serial interface and guarantees operation across the automotive temperature range of –40°C to +125°C.

Analog To Digital Converters (ADC) Feature Summary

• 14-bit resolution with 2.8Msps sampling rate
• Low power: 12mW active, 10µW Sleep mode
• Internal 2.5V reference with external overdrive capability
• 80dB CMRR for noise rejection
• Automotive grade (-40°C to +125°C)

Analog To Digital Converters (ADC) Applications

• Automotive sensor interfaces
• Portable data acquisition systems
• Multiphase motor control
• Communications equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'HMSE' corresponds to the high-temperature automotive grade (-40°C to +125°C) and the '#PBF' indicates lead-free RoHS compliance. Confirm pinout compatibility with standard 10-lead MSOP footprints during integration. Ensure the design accounts for the exposed pad requirement for thermal and electrical grounding.

Analog To Digital Converters (ADC) Selection Notes

Select this component when 14-bit accuracy is required alongside high-speed conversion up to 2.8Msps in space-constrained designs. The internal reference simplifies board layout but requires careful bypassing. For applications demanding lower power than the active 12mW, utilize the Sleep mode. Verify that the source impedance allows for the specified 39ns acquisition time without additional buffering.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1403 family, which also includes the 12-bit LTC1403 variant. The 'A' designation specifically denotes the 14-bit version with tighter linearity specifications compared to the base model. The 'H' suffix identifies the extended temperature range suitable for harsh environments.

Analog To Digital Converters (ADC) Replacement Considerations

Direct replacements within the same family include the LTC1403IMSE#PBF for industrial temperature ranges or the LTC1403CMSE#PBF for commercial grades. Note that these variants offer only 12-bit resolution. Cross-family replacements require verification of pinout and voltage level compatibility.

Analog To Digital Converters (ADC) FAQ

What is the maximum clock frequency for the serial interface?

The device supports a maximum SCK frequency of 50.4MHz to achieve the full 2.8Msps sampling rate.

Can the internal reference be overridden?

Yes, the VREF pin can be overdriven by an external reference between 2.55V and VDD.

How does the common mode rejection perform at high frequencies?

The CMRR is typically 80dB at low frequencies but degrades to approximately -15dB at 100MHz input frequency.