NSI1300D25-DSWVR
NOVOSENSE NSI1300D25-DSWVR isolated amplifier with a ±50 / ±250 mV differential input, 5000 Vrms isolation and a high CMTI for current sensing.
The NSI1300D25-DSWVR is a NOVOSENSE high-performance isolated amplifier that measures a small differential voltage on the high-voltage side and reproduces it on the low-voltage side with the NOVOSENSE capacitive isolation barrier in between. The input has a linear differential range of about ±50 mV (±64 mV full scale) and a second option of ±250 mV (±320 mV full scale), so it suits the small voltage across a shunt in a motor-phase or a bus current measurement, and the output is differential for a good rejection of the common-mode noise at the controller. The capacitive barrier gives a high common-mode transient immunity, so the measurement survives the fast common-mode step that a switching stage imposes, and the device operates from about 3 V to 5.5 V. The isolated amplifier is a clean and robust way to measure a current on the high side, where a direct shunt measurement would be difficult and a non-isolated amplifier would be exposed to the switching noise. Typical applications include motor-phase and bus current sensing, inverter and power-factor-correction current sense and industrial power conversion. Every device BeiLuo ships is factory-traceable and includes an import declaration, a certificate of origin and a RoHS compliance file. Our FAE team helps you choose the input range and plan the isolation and the layout.
FAE Professional Review
The NSI1300D25-DSWVR is the isolated amplifier we recommend for a high-side current measurement, with a ±50 mV or ±250 mV input for a shunt and a differential output for noise rejection. The capacitive barrier gives a high CMTI, so the reading survives the switching transient. Keep the shunt and the input filter close and keep the low-voltage side away from the switching nodes.
| Parameter | Value |
|---|---|
| Type | Isolated amplifier |
| Isolation | 5000 Vrms |
| Key Spec | ±50 / ±250 mV input |
| Supply | 3-5.5 V |
| Grade | Industrial |
Application Circuits
Motor-phase and bus current sense
Reference circuits and application schematics for Motor-phase and bus current sense are available from our FAE team.
Inverter and PFC current sense
Reference circuits and application schematics for Inverter and PFC current sense are available from our FAE team.
Industrial power conversion
Reference circuits and application schematics for Industrial power conversion are available from our FAE team.
Need a reference schematic or design review? Our FAE engineers can share verified circuits and layout guidance for this part.
Related Documents
Alternative Part Numbers
| Model | Package | Note | Action |
|---|---|---|---|
| NSI1311-Q1SWVR | Automotive-grade isolated amplifier with the same approach | View |
Complementary Part Numbers
| Model | Package | Note | Action |
|---|---|---|---|
| NSI8220N0-DSPR | 8-SOIC | Digital isolator for the control interface on the same board | View |
| NSi6801B-DSWFR | Isolated gate driver for the power stage being measured | View |
Recommended Complementary Products
Frequently Asked Questions
What projects suit the NSI1300D25-DSWVR?
It suits a high-side current measurement across a shunt in a motor phase or a dc bus, where the isolation and the high common-mode transient immunity keep the reading accurate despite the switching. The ±50 mV and ±250 mV input options cover a range of shunts.
Confirm the input range and the shunt.
Which input range should I choose?
Choose the ±50 mV range for a small shunt voltage with a low loss, and the ±250 mV range for a larger shunt voltage with a better noise margin. Match the shunt and the range so the full current uses the input span without saturating.
Our FAE team can help size the shunt.
Is the device genuine and documented?
BeiLuo supplies factory-traceable NSI1300D25-DSWVR devices with an import declaration, certificate of origin and RoHS file on every order. Stock is normally available and the datasheet downloads from this page.
Order a sample to validate the device before volume production.