The ADS1271 is a high-performance 24-bit, delta-sigma analog-to-digital converter (ADC) with a data rate up to 105 kSPS, providing an exclusive combination of excellent DC accuracy and outstanding AC performance.
The ADS1271 is a 24‑bit, delta‑sigma analog‑to‑digital converter offering up to 105 kSPS data rate. It provides excellent DC accuracy (1.8 µV/°C offset drift, 2 ppm/°C gain drift) and AC performance (109 dB SNR in high‑resolution mode, -105 dB THD). Three operating modes (high‑speed, high‑resolution, low‑power) let users balance speed, resolution, and power consumption, while a selectable SPI™ or frame‑sync serial interface simplifies integration with microcontrollers or DSPs.
The datasheet details absolute maximum ratings, electrical characteristics, pin assignments, timing specifications for both SPI and frame‑sync formats, and typical performance graphs. Mechanical dimensions for the TSSOP package and the standard TI product notice are also included.
| Data Rate (High‑Speed mode) | 105 kSPS |
|---|---|
| Resolution | 24 bits |
| Signal‑to‑Noise Ratio (High‑Resolution mode) | 109 dB |
| Total Harmonic Distortion | -105 dB |
| Power Dissipation (High‑Resolution mode) | 90 mW |
| Analog Supply Voltage (AVDD) | 5 V |
| Digital Supply Voltage (DVDD) | 1.8 V to 3.3 V |
| Operating Temperature Range | -40 °C to +105 °C |
| Offset Drift | 1.8 µV/°C |
| Gain Drift | 2 ppm/°C |
The ADS1271 can operate at up to 105 kSPS in High‑Speed mode.
It uses a 5 V analog supply (AVDD) and a digital supply (DVDD) of 1.8 V to 3.3 V.
The device supports either an SPI interface or a frame‑sync serial interface.
It is specified for operation from –40 °C to +105 °C.