ADS127L01IPBSR

Overview

The ADS127L01IPBSR is a single-channel, 24-bit delta-sigma analog-to-digital converter (ADC) manufactured by Texas Instruments. It supports data rates up to 512 kSPS with a maximum passband of 230 kHz. The device operates on a 2.7 V to 3.6 V analog supply and a 1.7 V to 3.6 V digital supply. Key performance metrics include an SNR of 115.5 dB at OSR 256 and a power consumption as low as 7 mW in specific modes. It features a 32-TQFP package, differential input, SPI interface, and external reference capability.

Feature Summary

• High-order chopper-stabilized modulator for low drift and noise
• Multiple digital filter options including low-latency and wideband variants
• Daisy-chainable serial interface compatible with SPI and frame-sync protocols

Applications

• Network analyzer front-ends requiring deterministic timing
• IEPE sensor signal acquisition systems
• Multi-channel synchronized data acquisition setups

Procurement Notes

Verify the specific suffix IPBSR corresponds to the 32-TQFP(5x5) package and Reel/Cut Tape packaging options. Confirm RoHS compliance status and MSL level 2 requirements during storage handling. Ensure the ordering part number matches the exact speed grade and temperature range specifications required for the target application environment.

Selection Notes

Select this component when high DC accuracy and AC performance are required in a single-channel configuration. Consider the available operating modes to balance between resolution and power consumption based on system constraints. Verify that the external reference voltage and clock source meet the specified input ranges for optimal SNR performance.

Part Context

This part belongs to the ADS127L01 series of broadband ADCs from Texas Instruments. It shares architectural similarities with other devices in the family but is distinguished by its single-channel design and specific power-performance trade-offs. The IPBSR designation indicates the surface-mount TQFP package variant suitable for automated assembly processes.

Replacement Considerations

Direct substitutes within the same family include other ADS127L01 variants with different package or speed grades. Cross-referencing requires matching the 24-bit resolution, 512 kSPS max rate, and TQFP-32 footprint. Verify pin compatibility and register settings if replacing with multi-channel versions like the ADS127L02.

FAQ

How does the ADS127L01 handle synchronization between multiple devices?

Multiple ADS127L01 devices can be synchronized using a common START pin and CLK signal. Deterministic timing is achieved when setup times are met, ensuring DRDY signals transition simultaneously across devices.

What causes asynchronous DRDY signals in multi-device setups?

Asynchronous DRDY signals may result from transient voltage spikes on the VREFP line exceeding maximum limits or dropping too low, potentially causing internal resets or loss of synchronization.

Can the ADS127L01 operate in daisy-chain mode?

Yes, the device supports daisy-chain operation via its SPI-compatible serial interface, allowing multiple units to be connected sequentially for efficient data readout.