A 16-bit isolated sigma-delta modulator converts a pseudo differential analog input into a high speed, single-bit digital data stream. The device operates from a 4.5 V to 20 V analog-side supply and a 3 V to 5.5 V serial-interface supply. Its full-scale analog input range is ±64 mV, with specified performance over ±50 mV and typical 82 dB SNR at a 20 MHz master clock with 256 decimation. On-chip iCoupler digital isolation provides 5700 Vrms withstand voltage and high common-mode transient immunity for shunt current monitoring and inverter applications.
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| Converter Type | Isolated sigma-delta modulator |
| Resolution | 16bits |
| Analog Input Full-Scale Range | ±64mV |
| Specified Analog Input Range | ±50mV |
| Analog-Side Supply Voltage | 4.5 to 20V |
| Interface-Side Supply Voltage | 3 to 5.5V |
| Master Clock Input Frequency | 5 to 21MHz |
| Typical SNR | 82dB |
| Typical ENOB | 13bits |
| Maximum Offset Drift, 16-Lead SOIC_W | ±0.25µV/°C |
| Maximum VDD1 Current | 10mA |
| Minimum Isolation Withstand Voltage | 5700Vrms |
| Minimum Common-Mode Transient Immunity | 150kV/µs |
| Operating Temperature, 16-Lead SOIC_W | -40 to +125°C |
| Operating Temperature, 8-Lead SOIC_IC | -40 to +105°C |
| RoHS | Compliant |
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These are design resources that include the Analog Devices ADuM7704
User guide for the EV-ADuM7704-8FMCZ evaluation board used to test the ADuM7704 16-bit isolated sigma-delta modulator with the SDP-H1 controller and ACE software.
