Texas Instruments ADS1291IRSMR, 24-bit analog front-end, 1 channel, 495 µW, 2.7-5.25 V analog supply, 1.7-3.6 V digital supply, 32-VFQFN exposed pad, surface mount, active.
| Parameter | Value |
|---|---|
| Mounting type | Surface Mount |
| Voltage - supply, analog | 2.7V ~ 5.25V |
| Voltage - supply, digital | 1.7V ~ 3.6V |
| Power (Watts) | 495 µW |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Number of bits | 24 |
| Case | 32-VFQFN Exposed Pad |
| Number of channels | 1 |
Housed in a 32-VQFN (4x4 mm) with an exposed thermal pad, the ADS1291IRSMR is a surface-mount part intended for reflow soldering. The small footprint suits two-layer medical PCBs where real estate is at a premium. The exposed pad must be soldered to a ground plane for thermal and electrical performance — standard practice for this package class.
The ADS1291IRSMR is listed as Active and ROHS3 compliant.
Within the same family, the ADS1292 (2-channel) and ADS1294 (4-channel) are higher-channel-count siblings. For a single-channel application, the ADS1291 is the correct density — no pin-compatible drop-in exists with a different channel count in the same footprint.