AD7403 16-Bit, Isolated Sigma-Delta Modulator
The AD7403 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 AD7403 operates from a 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 up to 20 MHz. The original information can be reconstructed with an appropriate digital filter to achieve 88 dB signal to noise ratio (SNR) at 78.1 kSPS. The serial input/output can use a 5 V or a 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 AD7403 device is offered in a 16-lead, wide-body SOIC package and has an oper-ating temperature range of −40°C to +125°C. The AD7403-8 device is offered in an 8-lead, wide-body SOIC package and has an operating temperature range of −40°C to +105°C.
Applications
- Shunt current monitoring
- AC motor controls
- Power and solar inverters
- Wind turbine inverters
- Data acquisition systems
- Analog-to-digital and opto-isolator replacements
Features and Benefits- 5 MHz to 20 MHz external clock input rate
- 16 bits, no missing codes
- Signal to noise ratio (SNR): 88 dB (typical)
- Effective number of bits (ENOB): 14.2 bits typical
- Typical offset drift vs. temperature: 1.6 μV/°C typical
- On-board digital isolator
- On-board reference
- See data sheet for additional features
- Download AD7403-EP data sheet
- Military temperature range: −55°C to +125°C
- Controlled manufacturing baseline
- One assembly/test site
- One fabrication site
- Enhanced product change notification
- Qualification data available on request
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Data Sheets
Application Notes
User Guides
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| AD7403-8BRIZ Production | 8 ld SOIC (increased Creepage) | OTH 80 | -40 to 105C | 3.72 | 3.15 | Y |
| AD7403-8BRIZ-RL Production | 8 ld SOIC (increased Creepage) | REEL 1500 | -40 to 105C | 0 | 3.15 | Y |
| AD7403-8BRIZ-RL7 Production | 8 ld SOIC (increased Creepage) | REEL 400 | -40 to 105C | 0 | 3.15 | Y |
| AD7403BRIZ Production | 16 ld SOIC (increased Creepage) | OTH 37 | -40 to 125C | 3.95 | 3.35 | Y |
| AD7403BRIZ-RL Production | 16 ld SOIC (increased Creepage) | REEL 1000 | -40 to 125C | 0 | 3.35 | Y |
| AD7403BRIZ-RL7 Production | 16 ld SOIC (increased Creepage) | REEL 400 | -40 to 125C | 0 | 3.35 | Y |
| AD7403TRIZ-EP Production | 16 ld SOIC (increased Creepage) | OTH 37 | -40 to 125C | 5.93 | 5.03 | Y |
| AD7403TRIZ-EP-RL7 Production | 16 ld SOIC (increased Creepage) | REEL 400 | -40 to 125C | 0 | 5.03 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| AD-FMCMOTCON2-EBZ | Evaluation Board | 999 | Y |
| EVAL-AD7403-8FMCZ | Evaluation Board - 8 pin | 99 | Y |
| EVAL-AD7403FMCZ | Evaluation Board - 16 pin | 99 | Y |
| EV-MCS-ISOINVEP-Z | Isolated Inverter Evaluation Board – Enhanced Protection | 1495 | Y |
| EV-MCS-ISOINV-Z | Isolated Inverter Evaluation Board | 1495 | Y |
| EV-MCS-LVBRD-Z | Evaluation Board - Board only option | 465 | Y |
| EV-MCS-LVDRV-Z | Evaluation Board - Kit option | 695 | Y |
Reference Materials
