AD7400A Isolated Sigma-Delta Modulator
The AD7400A is a second-order, Σ-Δ modulator that converts an analog input signal into a high speed, 1-bit data stream with on-chip digital isolation based on Analog Devices, Inc., iCoupler® technology. The AD7400A operates from a 5 V power supply and accepts a differential input signal of ±250 mV (±320 mV full scale). The analog input is sampled continuously by the analog modulator, eliminating the need for external sample-and-hold circuitry. The input information is contained in the output stream as a density of ones with a data rate of 10 MHz. The original information can be reconstructed with an appropriate digital filter. The serial I/O can use a 5 V or a 3 V supply (VDD2).
The serial interface is digitally isolated. High speed CMOS, combined with monolithic air core transformer technology, means the on-chip isolation provides outstanding performance characteristics superior to alternatives such as optocoupler devices. The part contains an on-chip reference and has an operating temperature range of −40°C to +125°C. The AD7400A is offered in an 8-lead surface-mount PDIP with gull wing leads and a 16-lead SOIC package.
Applications
- AC motor controls
- Shunt current monitoring
- Data acquisition systems
- Analog-to-digital and opto-isolator replacements
Features and Benefits- 10 MHz clock rate
- Second-order modulator
- 16 bits no missing codes
- ±2 LSB INL typical at 16 bits
- 1.5 μV/°C typical offset drift
- On-board digital isolator
- 8-lead surface-mount PDIP package with gull wing leads and 16-lead SOIC package
- See Data Sheet for Additional Information
| IBIS ModelsReference Designs |
Data Sheets
Frequently Asked Questions
Order Information
Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
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AD7400AYRWZ Production | 16 ld SOIC - Wide | OTH 47 | -40 to 125C | 3.6 | 3.05 | Y |
AD7400AYRWZ-RL Production | 16 ld SOIC - Wide | REEL 1000 | -40 to 125C | 0 | 3.05 | Y |
Evaluation Boards
Part Number | Description | Price | RoHS |
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EVAL-AD7400AEDZ | Evaluation Board | 59 | Y |
EVAL-CED1Z | Evaluation Controller Board | 249 | Y |
Reference Materials