Adum7701 is a high-performance second-order Σ-Δ The modulator has the on-chip digital isolation function based on icoupleri technology of ADI company, and can convert the analog input signal into a high-speed one bit data stream. The kit can operate with a 5V (vdd1) power supply and accept a Pseudo differential input signal of ± 250Mv (± 320mv full scale). The Pseudo differential input is suitable for parallel voltage monitoring in high voltage applications requiring electrical isolation.

The analog input is continuously sampled by a high-performance analog modulator and converted into a 1-density digital output stream with a data rate of up to 21mhz. The original information can be reconstructed using an appropriate digital filter to achieve a signal-to-noise ratio (SNR) of 86db at 78.lksps, so that adum7701 has a 20MHz MCLK. The serial I / O operates with a 5V or 3.3V power supply (VDD2).

The serial interface adopts digital isolation. The combination of high-speed complementary metal oxide semiconductor (CMOS) technology and integral transformer technology means that on-chip isolation can provide better performance characteristics than alternatives such as optocoupler kits. The adum7701 kit is available in 16 pin and 8-pin wide body SOIC packages with an operating temperature range of – 40 ° C to + 125 ° C.

Function and application scope of isolated analog-to-digital converter adum7701

Application:

Shunt current monitoring

AC motor control

Power supply and solar inverter

Wind turbine inverter

Module and optical isolator replacement

Responsible editor: GT

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