This datasheet details the AD7191, a pin-programmable, ultralow noise, 24-bit sigma-delta analog-to-digital converter designed for bridge sensors and high…
The AD7191 is a low noise, complete analog front end containing a 24-bit sigma-delta (Σ-Δ) ADC. It features an on-chip programmable gain amplifier with gains of 1, 8, 64, or 128, and supports differential input voltage ranges up to ±5 V. The device includes two differential analog inputs and an internal temperature sensor for compensation.
| RMS Noise (Gain=128) | 15 nV @ 10 Hz |
|---|---|
| Power Supply Voltage | 3 V to 5.25 V |
| Operating Temperature Range | -40°C to +105°C |
| Package Type | 24-lead TSSOP |
The on-chip PGA has a gain of 1, 8, 64, or 128.
The output data rate can be programmed to 10 Hz, 50 Hz, 60 Hz, or 120 Hz.
The AD7191 can be operated with the internal clock, or an external clock can be used.