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ADS127L21-C-EXAMPLE-CODE — ADS127L21 example C code
Expedite your embedded design using this example C code for the ADS127L21
ADS127L21
24-bit, 512-kSPS wide-bandwidth delta-sigma ADC with programmable IIR and FIR filters
Data sheet
ADS127L21
- Programmable FIR filter
- Programmable IIR filter
- Wideband or low-latency filter modes
- Programmable data rates:
- Wideband filter: 512kSPS
- Low-latency filter: 1.365MSPS
- Conversion latency (low-latency filter): 3µs
- AC accuracy with dc precision:
- Dynamic range (200kSPS): 111.5dB (typical)
- THD: –125dB (typical)
- INL: 0.4ppm of FSR (typical)
- Offset drift: 50nV/°C (typical)
- Gain drift: 0.5ppm/°C (typical)
- Power-scalable speed ranges:
- Max speed: 512kSPS, 33mW (typical)
- High speed: 400kSPS, 26mW (typical)
- Mid speed: 200kSPS, 14mW (typical)
- Low speed: 50kSPS, 4.3mW (typical)
- Input range: ±VREF or ±2VREF
- Buffered inputs
- Internal or external clock operation
- Functional Safety-Capable
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.
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Technical documentation
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WQFN (RUK) | 20 | Ultra Librarian |
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