The ADS1246, ADS1247, and ADS1248 are highly-integrated, precision, 24-bit analog-to-digital converters (ADCs). They feature an onboard, low-noise, programmable gain amplifier (PGA), a precision delta-sigma ADC with a single-cycle settling digital filter, and an internal oscillator. The ADS1247 and ADS1248 also provide a system monitor, programmable digital filter, and dual-channel current DACs.
The ADS1246, ADS1247, and ADS1248 are highly‑integrated 24‑bit analog‑to‑digital converters designed for temperature‑sensor and bridge‑sensor applications. They include a low‑noise programmable gain amplifier, a precision delta‑sigma ADC with single‑cycle settling, and an internal voltage reference with very low drift. The devices support up to 2 kSPS data rates and provide built‑in sensor burnout detection and general‑purpose I/Os.
The three parts are offered in TSSOP‑16 (ADS1246), TSSOP‑20 (ADS1247) and TSSOP‑28 (ADS1248) packages. Detailed pin‑out tables, electrical characteristics, and absolute maximum ratings are provided, along with mechanical drawing data and an important notice covering warranty and usage restrictions.
| Resolution | 24 bits, no missing codes |
|---|---|
| Maximum data rate | 2 kSPS |
| PGA gain settings | 1 to 128 |
| Input channels (ADS1248) | 4 differential, 7 single‑ended |
| Operating temperature range | -40 °C to +125 °C |
| Supply voltage | +3.3 V or +5 V |
| Low‑noise PGA | 48 nV at PGA = 128 |
| Voltage reference drift | 10 ppm/°C (max) |
| Quiescent current | 180 µA (AVDD) |
The devices support data rates up to 2 kSPS.
They operate from either +3.3 V or +5 V supplies.
The ADS1248 offers four differential and seven single‑ended inputs.
The ADCs operate from –40 °C to +125 °C.