AD7190 is a high precision, low noise, 24-bit sigma-delta ADC with programmable gain amplifier from Analog Devices. It can operate at output data rates from 4.7Hz to 4.8kHz.
The AD7190 is a low‑noise, 24‑bit sigma‑delta analog‑to‑digital converter designed for high‑precision measurement applications such as weigh scales, strain‑gauge transducers, pressure and temperature sensing, chromatography, and data‑acquisition systems. It offers up to 22.5 noise‑free bits, programmable gain from 1 to 128, and selectable output data rates from 4.7 Hz to 4.8 kHz.
The device operates from a 5 V analog supply and a 2.7‑5.25 V digital supply, consuming about 6 mA. It is available in a 24‑lead TSSOP package and includes features such as an on‑chip clock, simultaneous 50 Hz/60 Hz rejection, four general‑purpose digital outputs, and multiple input configurations (2 differential or 4 pseudo‑differential channels).
| RMS noise | 8.5 nV @ 4.7 Hz (gain = 128) |
|---|---|
| Output data rate | 4.7 Hz to 4.8 kHz |
| Analog supply voltage (AVon) | 4.75 V to 5.25 V |
| Digital supply voltage (DVpp) | 2.7 V to 5.25 V |
| Supply current | 6 mA |
| Operating temperature range | -40 °C to +105 °C |
| Package | 24‑lead TSSOP (RU‑24) |
The AD7190 achieves an RMS noise of 8.5 nV at 4.7 Hz with a gain of 128.
It operates from an analog supply of 4.75 V to 5.25 V and a digital supply of 2.7 V to 5.25 V.
The device is rated for temperatures from –40 °C to +105 °C.
The AD7190 is supplied in a 24‑lead thin‑shrink small‑outline package (TSSOP, RU‑24).