ADS8381IPFBT

Analog To Digital Converters (ADC) Overview

The ADS8381IPFBT is an 18-bit, 580-kHz analog-to-digital converter (ADC) from Texas Instruments. It features a capacitor-based successive approximation register (SAR) architecture with inherent sample-and-hold functionality. The device operates on a 5-V analog supply (+VA) and a flexible 2.7 V to 5.25 V digital buffer supply (+VBD). Key electrical parameters include a throughput rate of 580 kHz, a conversion time of 1.4 µs, and a typical power dissipation of 115 mW at maximum sampling rates. It supports unipolar input ranges and offers a flexible parallel data interface.

Analog To Digital Converters (ADC) Feature Summary

• 18-bit resolution with no missing codes ensured over the industrial temperature range
• High-speed performance with a 580 kHz throughput rate and 1.4 µs conversion time
• Integrated onboard reference buffer and conversion clock for simplified system design
• Flexible 8-, 16-, or 18-bit parallel data output interface options

Analog To Digital Converters (ADC) Applications

• Medical instruments
• Optical networking systems
• Transducer interfaces
• High accuracy data acquisition systems
• Magnetometers

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'PFBT' corresponds to the 48-lead TQFP package in tape and reel format containing 250 units. Confirm that the 'I' grade designation meets the required integral linearity specifications of ±6 LSBs and differential linearity of -2/3 LSBs for your application environment. Ensure the component matches the SLAS364D datasheet revision dated February 2005.

Analog To Digital Converters (ADC) Selection Notes

Select this model when an 18-bit resolution is mandatory alongside high-speed sampling up to 580 kHz. The device requires a 5-V analog supply and a separate digital supply between 2.7 V and 5.25 V. Consider the ADS8383 if pin compatibility is needed but different linearity grades are acceptable. Verify that the system can accommodate the 48-pin TQFP footprint and the specific timing requirements for the parallel bus interface.

Analog To Digital Converters (ADC) Part Context

This component belongs to the ADS838x family of high-speed, high-resolution ADCs manufactured by Texas Instruments. The ADS8381 specifically targets applications requiring precise data conversion without external reference buffers. It is characterized for operation within an industrial temperature range of -40°C to +85°C, distinguishing it from commercial grade variants.

Analog To Digital Converters (ADC) Replacement Considerations

The datasheet notes pin compatibility with the ADS8383. However, the ADS8383 typically offers lower linearity specifications (±5 LSB INL vs ±6 LSB for the I-grade ADS8381). Verify if the reduced linearity of the substitute meets the system's accuracy requirements before substitution.