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. The AD7400 is offered in a 16-lead SOIC and has an operating temperature range of −40°C to +105°C. An external clock version, AD7401, is also available. Applications AC motor controls Data acquisition systems A/D + opto-isolator replacements
The AD7400 is a second-order, sigma-delta (Σ-Δ) modulator that converts an analog input signal to a high speed, 1-bit data stream with on-chip digital isolation based on Analog Devices, Inc. iCoupler® technology. The AD7400 operates from a 5 V power supply and accepts a differential input signal of ±200 mV (±320 mV full scale). The analog input is continuously sampled 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. The AD7400 is offered in a 16-lead SOIC and has an operating temperature range of −40°C to +105°C.
An external clock version, AD7401, is also available.
Applications
Features and Benefits
| Analog to Digital ConvertersInterface & IsolationAerospace and Defense
IBIS ModelsSoftware & Systems Requirements |
| Document | note |
| AD7400: Isolated Sigma-Delta Modulator Data Sheet (Rev. G) | PDF 503 kB |
| Document | note |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| AD7400YRWZ Production | 16 ld SOIC - Wide | OTH 47 | -40 to 105C | 3.72 | 3.15 | Y |
| AD7400YRWZ-REEL Production | 16 ld SOIC - Wide | REEL 1000 | -40 to 105C | 0 | 3.15 | Y |
| AD7400YRWZ-REEL7 Production | 16 ld SOIC - Wide | REEL 400 | -40 to 105C | 0 | 3.15 | Y |
| Part Number | Description | Price | RoHS |
|---|---|---|---|
| EVAL-AD7400EDZ | Evaluation Board | 59 | Y |
| EVAL-CED1Z | Evaluation Controller Board | 249 | Y |
