ADS1217IPFBR

Overview

The ADS1217IPFBR is an eight-channel, 24-bit analog-to-digital converter (ADC) manufactured by Texas Instruments. It utilizes a sigma-delta architecture and features a serial peripheral interface (SPI). The device supports differential inputs with a sampling rate of up to 780 samples per second. It operates on both analog and digital power supplies ranging from 2.7 V to 5.25 V. Key specifications include a differential nonlinearity (DNL) of +/- 1 LSB and an integral nonlinearity (INL) of 0.0012% FSR. The component is housed in a TQFP-48 package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated excitation current sources (iDACs) for sensor biasing
• Built-in programmable gain amplifier (PGA)
• On-chip oscillator and general-purpose input/output (GPIO) pins

Applications

• Industrial process control systems
• Weigh scales and load cell measurements
• Medical instrumentation

Procurement Notes

Verify the specific suffix IPFBR against the manufacturer's official datasheet to confirm the tape-and-reel packaging configuration. Ensure the order matches the exact pinout and thermal characteristics defined in the TQFP-48 specification. Cross-reference the RoHS compliance status with the latest regulatory documentation provided by Texas Instruments prior to finalizing procurement.

Selection Notes

Select this component when high-resolution multi-channel acquisition is required without external multiplexers. The integrated iDACs simplify sensor excitation circuits compared to standard ADCs. Consider the 780 S/s maximum data rate and 24-bit resolution limits for bandwidth requirements. Verify that the SPI interface timing aligns with the host microcontroller capabilities.

Part Context

This part belongs to the ADS121x family of precision ADCs, which are designed for low-power, high-accuracy applications. The ADS1217 specifically offers eight channels, distinguishing it from single or dual-channel variants in the same series. It shares architectural similarities with the ADS1216 and ADS1218 but provides a higher channel count for complex sensing arrays.

Replacement Considerations

The ADS1217IPFBRG4 is a verified lead-free variant of the same functional device. Other members of the ADS121x family may serve as alternatives if channel count differences are acceptable.