The ADS127L01 is a 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) with data
rates up to 512 kSPS. This device offers a unique combination of excellent dc accuracy and
outstanding ac performance. The high-order, chopper-stabilized modulator achieves very low drift
with low in-band noise. The integrated decimation filter suppresses modulator out-of-band noise. In
addition to al low-latency filter, the ADS127L01 provides multiple Wideband filters with less than
±0.00004 dB of ripple, and an option for –116-dB stop-band attenuation at the Nyquist rate.
Traditionally, industrial delta-sigma ADCs that offer good drift performance use digital
filters with large passband droop. As a result, industrial delta-sigma ADCs have limited signal
bandwidth and are mostly suited for dc measurements. High-resolution ADCs in audio applications
offer larger usable bandwidths, but the offset and drift specifications are significantly weaker
than industrial counterparts. The ADS127L01 combines these converters, providing high-precision
industrial measurement with excellent dc and ac specifications over an extended industrial
temperature range of –40°C to +125°C.
A variety of operating modes allow for optimization of speed, resolution, and power. A
programmable serial interface with one of three options (SPI, frame-sync slave, or frame-sync
master) provides convenient interfacing across isolation barriers to microcontrollers or digital
signal processors (DSPs).
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