Analog Devices Inc. AD7403 16-Bit Isolated Sigma-Delta Modulators
Analog Devices Inc. AD7403/-8 16-Bit Isolated Sigma-Delta Modulators are 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 AD7403/-8 operates from a 5V (VDD1) power supply and accepts a differential input signal of ±250mV (±320mV 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 up to 20MHz.
The original information can be reconstructed with an appropriate digital filter to achieve 88dB signal to noise ratio (SNR) at 78.1kSPS. The serial input/output can use a 5V or a 3V 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.
Features
- 5MHz to 20MHz external clock input rate
- 16 bits, no missing codes
- Signal-to-noise ratio (SNR): 88dB typical
- Effective number of bits (ENOB): 14.2 bits typical
- Offset drift vs. temperature:
- AD7403: 1.6μV/°C typical
- AD7403-8: 2μV/°C typical
- On-board digital isolator
- On-board reference
- Full-scale analog input range: ±320mV
- Operating range
- AD7403: -40°C to + 125°C
- AD7403/-8: -40°C to + 105°C
- High common-mode transient immunity: >25kV/μs
- 16-lead, wide-body SOIC, with increased creepage package
- Slew rate limited output for low electromagnetic interference (EMI)
- Safety and regulatory approvals (pending)
- UL recognition
- 5000Vrms for 1 minute per UL 1577
- CSA Component Acceptance Notice 5A
- VDE Certificate of Conformity
- DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12 VIORM = 1250VPEAK
- UL recognition
Applications
- Shunt current monitoring
- AC motor controls
- Power and solar inverters
- Wind turbine inverters
- Data acquisition systems
- Analog-to-digital and opto-isolator replacements
Associated Solutions
Analog Devices Inc. Motor Control Solutions
The components and full signal chain integration to enable rapid design of motor-based systems.
Publicado: 2014-07-10
| Actualizado: 2022-03-11