The AD7191 is a 24-bit, low-power, high-precision, highly integrated analog-to-digital converter (ADC) with sigma-delta architecture that is optimized for bridge sensor applications.
The AD7191 is a low‑noise, 24‑bit sigma‑delta ADC designed for high‑precision measurement applications such as weigh scales, strain‑gauge transducers, pressure measurement, and medical instrumentation. It features pin‑programmable output data rates, gain settings, power‑down control, and an on‑chip temperature sensor for compensation.
Key features include a selectable output data rate of 10 Hz, 50 Hz, 60 Hz or 120 Hz, gain options of 1, 8, 64 or 128, RMS noise as low as 15 nV at 10 Hz (gain = 128), and operation from a 3 V to 5.25 V supply in a 24‑lead TSSOP package.
| Output Data Rate | 10 Hz, 50 Hz, 60 Hz, 120 Hz |
|---|---|
| Resolution | 24 bits |
| RMS Noise | 15 nV @ 10 Hz (gain = 128) |
| Power Supply Voltage | 3 V to 5.25 V |
| Supply Current | 4.35 mA |
| Temperature Range | -40 °C to +105 °C |
| Package | 24‑lead TSSOP |
| Gain Options | 1, 8, 64, 128 |
The AD7191 can be programmed for output data rates of 10 Hz, 50 Hz, 60 Hz, or 120 Hz.
The device operates from a power supply of 3 V to 5.25 V.
At a 10 Hz output data rate with a gain of 128, the RMS noise is 15 nV.
The AD7191 is available in a 24‑lead TSSOP (RU‑24) package.