The ADS127L21 is a 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC)
featuring programmable digital filters. This digital filter has data rates up to 512kSPS
using the wideband filter and up to 1365kSPS using the low-latency filter. The device offers
an excellent combination of ac performance and dc precision with low power consumption.
Programmable infinite and finite impulse
response (IIR and FIR) digital filters allow custom filter profiles, such as A-weighting
compensation and frequency notch filters. The wideband or low-latency filter option optimize
ac-signal performance or data throughput of dc signals, all in one device.
The low-drift modulator achieves excellent
dc precision with low wideband noise for outstanding ac performance. The power-scalable
architecture features four speed modes to optimize data rate, resolution, and power
consumption. Signal and reference input buffers reduce driver loading for increased
accuracy.
The serial interface features daisy-chain
capability to reduce the number of signal lines over an isolation barrier. SPI input data
and register memory contents are validated by cyclic-redundancy check (CRC) to enhance
operational reliability.
The small 3mm × 3mm WQFN package is designed
for space-limited applications. The device is fully specified for operation over the –40°C
to +125°C temperature range.
The ADS127L21 is a 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC)
featuring programmable digital filters. This digital filter has data rates up to 512kSPS
using the wideband filter and up to 1365kSPS using the low-latency filter. The device offers
an excellent combination of ac performance and dc precision with low power consumption.
Programmable infinite and finite impulse
response (IIR and FIR) digital filters allow custom filter profiles, such as A-weighting
compensation and frequency notch filters. The wideband or low-latency filter option optimize
ac-signal performance or data throughput of dc signals, all in one device.
The low-drift modulator achieves excellent
dc precision with low wideband noise for outstanding ac performance. The power-scalable
architecture features four speed modes to optimize data rate, resolution, and power
consumption. Signal and reference input buffers reduce driver loading for increased
accuracy.
The serial interface features daisy-chain
capability to reduce the number of signal lines over an isolation barrier. SPI input data
and register memory contents are validated by cyclic-redundancy check (CRC) to enhance
operational reliability.
The small 3mm × 3mm WQFN package is designed
for space-limited applications. The device is fully specified for operation over the –40°C
to +125°C temperature range.