Analog Devices Inc. ADuM7811 Isolated Analog-to-Digital Converters
Analog Devices ADuM7811 Isolated Analog-to-Digital Converters integrate a second-order sigma-delta modulator with iCoupler® digital isolation to deliver high-accuracy signal conversion in high-voltage environments. The devices continuously sample a differential analog input and output a single-bit data stream that allows precise system-level reconstruction using external filtering.
High common-mode transient immunity and robust isolation performance enable reliable operation in noisy industrial and motor control applications. ADI ADuM7811 Isolated Analog-to-Digital Converters combine high-speed CMOS processing with transformer-based isolation to provide an alternative to traditional optocoupler-based approaches while maintaining fast, stable data transfer across isolation barriers.
The ADuM7811 is ideal for shunt current monitoring, AC motor control, and power inverter designs that require accurate isolated measurements. The ADuM7811 devices are available in compact SOIC packages and support operation across a -40°C to +125°C temperature range.
Features
- 5MHz to 50MHz main clock input frequency
- 16-bits with no missing codes
- Full-scale analog input voltage range of ±320mV
- 88dB typical SNR
- Integrated digital isolator
- High isolation common-mode transient immunity of 200kV/μs minimum
- Offset drift vs. temperature at ±0.60μV/°C maximum
- Gain error drift vs. temperature at ±28ppm/°C maximum
- Safety and regulatory approvals
- UL 1577 pending, VISO = 5700Vrms for 1minute
- IEC/EN/CSA 62368-1 pending
- IEC/CSA 61010-1 pending
- DIN EN IEC 60747-17 (VDE 0884-17) pending, VIORM = 2121V peak
Applications
- Shunt current monitoring
- AC motor controls
- Power and solar inverters
- Wind turbine inverters
- Analog-to-digital and opto-isolator replacement
Specifications
- High-side supply voltage range of 4.0V to 5.5V
- Controller-side supply voltage range of 3V to 5.5V
- Pseudodifferential input signal of ±250mV for specified operation
- Data rate up to 51MHz
- Operating temperature range of -40°C to +125°C
- 195.3kSPS with 256 decimation rate and 50MHz input clock using an appropriate sinc3 digital filter
- Packages
- Wide-body SOIC
- 8-lead SOIC
Typical Application Circuit
Block Diagram
Board
Analog Devices Inc. EVAL-ADuM7811 Evaluation Board
A fully featured platform for evaluating the ADuM7811 ADC with sigma-delta-modulated bitstream.