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Overview
Features and Benefits
- 5 MHz to 21 MHz master clock input frequency
- Offset drift vs. temperature: ±0.25 μV/°C maximum
- SNR: 82 dB typical
- 16 bits, no missing codes
- Full-scale analog input voltage range: ±64 mV
- ENOB: 13 bits typical
- IDD1: 10 mA maximum
- On-board digital isolator
- Operating temperature range
- −40°C to +125°C (16-lead SOIC_W)
- −40°C to +105°C (8-lead SOIC_IC)
- High isolation common-mode transient immunity:
- 150 kV/μs minimum, VDD2 = 3.3 V
- Wide-body SOICs
- 16-lead SOIC_W
- 8-lead SOIC_IC with increased creepage
- Safety and regulatory approvals
- UL recognition
- 5700 V rms for 1 minute per UL 1577
- CSA Component Acceptance Notice 5A
- VDE Certificate of Conformity
- DIN V VDE V 0884-10: VIORM = 1270 VPEAK
- DIN V VDE V 0884-11: VIORM = 1060 VPEAK (pending)
- UL recognition
Product Details
The ADuM7704 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 device operates from a 4.5 V to 20 V power supply range (VDD1) and accepts a pseudo differential input signal of ±50 mV (±64 mV full-scale). The pseudo 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 up to 21 MHz. The original information can be reconstructed with an appropriate sinc3 digital filter to achieve an 82 dB signal-to-noise ratio (SNR) at 78.1 kSPS with a 256 decimation rate and a 20 MHz master clock. The serial input and output operates from a 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, results in the on-chip isolation providing outstanding performance characteristics, superior to alternatives such as optocoupler devices. The ADuM7704 is available in a 16-lead, wide-body SOIC_W with an operating temperature range of −40°C to +125°C and an 8-lead, wide-body SOIC_IC with an operating temperature range of −40°C to +105°C.
APPLICATIONS
- Shunt current monitoring
- AC motor controls
- Power and solar inverters
- Wind turbine inverters
- Analog-to-digital and optoisolator replacement
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Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| ADUM7704-8BRIZ | Material Declaration | Reliability Data | 8-Lead SOIC (Increased Creepage) | |
| ADUM7704-8BRIZ-RL | Material Declaration | Reliability Data | 8-Lead SOIC (Increased Creepage) | |
| ADUM7704-8BRIZ-RL7 | Material Declaration | Reliability Data | 8-Lead SOIC (Increased Creepage) | |
| ADUM7704BRWZ | Material Declaration | Reliability Data | 16-Lead SOIC Wide | |
| ADUM7704BRWZ-RL | Material Declaration | Reliability Data | 16-Lead SOIC Wide | |
| ADUM7704BRWZ-RL7 | Material Declaration | Reliability Data | 16-Lead SOIC Wide | |
| Wafer Fabrication Data |
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.