ADuM7812
PRE-RELEASE50MHz Isolated ADC with Sigma-Delta Modulated Bit Stream Output
- Part Models
- 2
- 1ku List Price
- Starting From $4.72
Overview
- 5MHz to 50MHz main clock input frequency
- 16 bits, no missing codes
- Full-scale analog input voltage range: ±64mV
- SNR: 82.4dB typical
- High isolation common-mode transient immunity: 200kV/μs minimum
- Offset drift vs. temperature: ±0.70μV/°C maximum
- Gain error drift vs. temperature: ±28ppm/°C maximum
- Integrated digital isolator
- Operating temperature range: −40°C to +125°C
- Wide-body SOIC
- 8-lead SOIC_IC
- Safety and regulatory approvals
- UL 1577
- VISO = 5700V RMS for 1minute
- IEC/EN/CSA 62368-1 (pending)
- IEC/CSA 60601-1 (pending)
- IEC/CSA 61010-1 (pending)
- UL 1577
- DIN EN IEC 60747-17 (VDE 0884-17) (pending)
- VIORM = 2121V peak
The ADuM7812 is a high-performance isolated analog-to-digital converter (ADC) with a second-order Σ-Δ modulator that converts an analog input signal into a high speed, single-bit data stream, with on-chip digital isolation based on Analog Devices, Inc., iCoupler® technology. The device operates from a 4.0V to 5.5V power supply range (high-side supply voltage, VDD1) and accepts a pseudodifferential input signal of ±50mV (±64mV full-scale). The pseudodifferential input is ideally suited for shunt-resistor current monitoring in high voltage applications where galvanic isolation is required.
The analog input is continuously sampled by a high-performance analog modulator and converted to a pulse density modulation digital output stream with a data rate of up to 51MHz (for specified performance limits, see the Electrical Specifications section). The analog input can be reconstructed with an appropriate sinc3 digital filter to achieve an 82.4dB signal-to-noise ratio (SNR) at 156.2kSPS with a 256 decimation rate and a 40MHz input clock. The serial input and output operate from a 3.0V to a 5.5V supply (controller-side supply voltage, VDD2).
The serial interface is digitally isolated. High speed complementary metal-oxide semiconductor (CMOS) technology, combined with monolithic transformer technology, results in the on-chip isolation providing outstanding performance characteristics, superior to alternatives such as optocoupler devices.
The ADuM7812 device is available in a 8-lead SOIC_IC and has an operating temperature range of −40°C to +125°C.
APPLICATIONS
- Shunt current monitoring
- AC motor controls
- Power and solar inverters
- Wind turbine inverters
- Analog-to-digital and opto-isolator replacement
Documentation
Data Sheet 1
User Guide 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| ADUM7812-8BRIZ | SOIC_IC | ||
| ADUM7812-8BRIZ-RL | SOIC_IC |
This is the most up-to-date revision of the Data Sheet.
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