The ADS1240 and ADS1241 are precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converters with 24-bit resolution operating from 2.7V to 5.25V power supplies. The delta-sigma A/D converter provides up to 24 bits of no missing code performance and effective resolution of 21 bits. The input channels are multiplexed. Internal buffering can be selected to provide very high input impedance for direct connection to transducers or low-level voltage signals. Burnout current sources are provided that allow for detection of an open or shorted sensor. An 8-bit Digital-to-Analog (D/A) converter provides an offset cor- rection with a range of 50% of the Full-Scale Range (FSR). The Programmable Gain Amplifier (PGA) provides selectable gains of 1 to 128, with an effective resolution of 19 bits at a gain of 128. The A/D conversion is accomplished with a 2nd-order delta-sigma modu- lator and programmable Finite-Impulse Response (FIR) filter that provides a simultaneous 50Hz and 60Hz notch.
The ADS1240 and ADS1241 are precision, 24‑bit delta‑sigma analog‑to‑digital converters offering no missing codes and up to 21 effective bits of resolution. They operate from 2.7 V to 5.25 V, provide programmable gain from 1 to 128, and include features such as single‑cycle settling, on‑chip calibration, and simultaneous 50 Hz/60 Hz notch filtering.
The devices support up to eight multiplexed input channels, a SPI‑compatible serial interface, and low power consumption suitable for smart transmitters, industrial process control, weigh scales, chromatography, blood analysis, and portable instrumentation. Detailed electrical characteristics, pin descriptions, timing diagrams, and mechanical data are provided in the document.
| Resolution | 24 bits (no missing codes) |
|---|---|
| Supply Voltage | 2.7 V to 5.25 V |
| Number of Input Channels | Up to 8 |
| Programmable Gain Amplifier (PGA) Range | 1 to 128 |
| Interface | SPI‑compatible serial interface |
The devices operate from 2.7 V to 5.25 V.
It supports up to eight multiplexed input channels.
It uses an SPI‑compatible serial interface.
The PGA gain can be set from 1 to 128.