Microchip offers single and multi-channel high resolution low-power delta sigma ADCs. The following table here show’s Microchip’s Delta-Sigma offerings at 16, 18, and 22 bits of resolution. The 16-bit, and 18-bit families offer features such as a programmable gain amplifier, self calibration of internal offset and gain per conversion, programmable sampling data rate options up to 240 samples per second, extended operating temperature from -40°C to 125°C, and an internal 2.048 V voltage reference with an industry leading accuracy of +/- 0.05%.