ADS127L11IPWR

Overview

The ADS127L11IPWR is a 24-bit delta-sigma analog-to-digital converter (ADC) manufactured by Texas Instruments, housed in a 20-pin TSSOP package. It supports data rates up to 400 kSPS with a wideband filter and up to 1067 kSPS with a low-latency filter. The device features a dynamic range of 111.5 dB at 200 kSPS, total harmonic distortion of –120 dB, and integral nonlinearity of 0.9 ppm of full scale. Power consumption is 18.6 mW in high-speed mode and 3.3 mW in low-speed mode. It operates over an ambient temperature range of –45°C to +125°C.

Feature Summary

• Configurable digital filters allow optimization for either wideband AC performance or low-latency DC signal throughput within a single device.
• Integrated input and reference precharge buffers reduce signal loading effects on the front-end circuitry.
• Serial interface supports daisy-chain capability to minimize SPI I/O requirements across isolation barriers.
• Cyclic-redundancy check (CRC) validation enhances operational reliability for input/output data and register settings.

Applications

• Data acquisition systems
• Shock and vibration instruments
• Acoustics and dynamic strain gauges
• Condition monitoring in factory automation
• Electroencephalogram (EEG) medical devices

Procurement Notes

Verify the specific ordering suffix 'IPWR' corresponds to the 20-pin TSSOP package variant when sourcing components. Confirm that the required operating voltage levels for AVDD1 and IOVDD align with the recommended operating conditions specified in the datasheet. Ensure proper handling procedures are followed due to the moisture sensitivity level associated with this surface-mount package type.

Selection Notes

Select the ADS127L11IPWR when space-constrained designs require a 20-lead TSSOP footprint instead of the WQFN option. This package is suitable for applications needing high-speed data conversion up to 400 kSPS with wideband filtering. Consider the thermal resistance characteristics of the TSSOP package relative to the expected power dissipation in the final assembly environment.

Part Context

The ADS127L11 belongs to Texas Instruments' family of high-performance delta-sigma ADCs designed for precision measurement applications. The IPWR suffix specifically denotes the industrial-grade temperature range and the 20-pin thin-shrink small-outline package (TSSOP). This component serves as a bridge between analog sensor signals and digital processing units in demanding environments.

Replacement Considerations

ADS127L11IPW: Identical electrical specifications and functionality but packaged in a standard TSSOP without the 'R' reel designation.

FAQ

What is the maximum data rate supported by the ADS127L11?

The device supports data rates up to 400 kSPS using the wideband filter and up to 1067 kSPS using the low-latency filter.

How does the ADS127L11 handle signal loading from the front end?

It integrates input and reference precharge buffers to significantly reduce signal loading effects, simplifying the design of the preceding analog circuitry.

Is the serial interface capable of connecting multiple devices?

Yes, the serial interface features daisy-chain capability, which allows multiple devices to be connected while reducing the number of SPI I/O lines required.