The AD7403 isolated sigma-delta modulator achieves an 81-dB Signal-to-Noise And Distortion ratio (SINAD) (min) @ 78 KSPS over a -40Cdeg to +125Cdeg temperature range, which is 11 dB higher than competing devices.
AD7403 Sigma-Delta Modulator integrates ADI's iCoupler Digital Isolation Technology
The AD7403 isolated sigma-delta modulator integrates ADI's iCoupler digital isolation technology, creating a single-chip solution for measuring the voltage across a shunt resistor by converting an analog signal into a 1-bit data stream that can be clocked at up to 20 MHz.
The higher performance of the isolated sigma-delta modulator enables the use of a smaller shunt resistor, which reduces thermal loss across the shunt while retaining measurement accuracy.
One is the 2nd order sigma-delta modulator with feed-forward signal path , which has a high linearity even at low OSR.
The simulated integrator outputs histograms of the 4th order cascaded sigma-delta modulator with -4dB/2.
5mW 185-Msample/s sigma-delta modulator for UMTS/GSM dual-standard IF Reception", IEEE J.
9 mW 79/50 dB DR sigma-delta modulator for GSM/WCDMA in a 0.
9] Jen-Shiun Chiang; Pao-Chu Chou; 2003, "Dual mode Sigma-Delta Modulator for Wideband Receiver Applications", Teng-Hung Chang; ISCAS '03.