AD7402
RECOMMENDED FOR NEW DESIGNS16-Bit, Isolated Sigma-Delta Modulator
- Part Models
- 3
- 1ku List Price
- Starting From $3.60
Part Details
- 10 MHz internal clock rate
- 16 bits, no missing codes
- Signal-to-noise ratio (SNR): 87 dB typical
- Effective number of bits (ENOB): 13.5 bits typical
- Typical offset drift vs. temperature: 1.7 µV/°C
- On-board digital isolator
- On-board reference
- Full-scale analog input range: ±320 mV
- −40°C to +105°C operating range
- High common-mode transient immunity: >25 kV/µs
- 8-lead, wide-body SOIC, with increased creepage package
- Slew rate limited output for low electromagnetic interference (EMI)
The AD74021 is a high performance, 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 AD7402 operates from a 4.5 V to 5.5 V (VDD1) power supply and accepts a differential input signal of ±250 mV (±320 mV full scale). The differential input is ideally suited to shunt voltage 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 ones density, digital output stream with a data rate of 10 MHz. The original information can be reconstructed with an appropriate digital filter to achieve 87 dB signal to noise ratio (SNR) at 39 kSPS. The serial input/output can use a 3 V to 5.5 V or a 3.3 V supply (VDD2).
The serial interface is digitally isolated. High speed complementary metal oxide semiconductor (CMOS) technology, combined with monolithic transformer technology, means the on-chip isolation provides outstanding performance characteristics, superior to alternatives such as optocoupler devices. The AD7402 device is offered in an 8-lead, wide body SOIC package and has an operating temperature range of −40°C to +105°C.
Safety and regulatory approvals
- UL 1577
- VISO = 5000 V rms for 1 minute
- IEC/CSA 62368-1
- IEC/CSA 60601-1
- DIN EN IEC 60747-17 (pending)
- VIORM = 1250 VPEAK
Applications
- Shunt current monitoring
- AC motor controls
- Power and solar inverters
- Wind turbine inverters
- Data acquisition systems
- Analog-to-digital and opto-isolator replacements
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329.
Documentation
Data Sheet 1
User Guide 1
Technical Articles 4
Informational 1
Safety and Regulatory Compliance 1
Video 4
Safety and Regulatory Compliance 1
Product Selection Guide 1
Webcast 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 |
|---|---|---|---|
| AD7402-8BRIZ | 8-Lead SOIC (Increased Creepage) | ||
| AD7402-8BRIZ-RL | 8-Lead SOIC (Increased Creepage) | ||
| AD7402-8BRIZ-RL7 | 8-Lead SOIC (Increased Creepage) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
IBIS Model 1
Evaluation Kits
Evaluation board for evaluating AD7402 16-Bit, Isolated Sigma-Delta Modulator
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