Product Overview
The CT425 is an integrated contact current sensor featuring Allegro's XtremeSense TMR technology for high bandwidth and ultra-low noise measurements. It offers high accuracy across various consumer, enterprise, and industrial applications, including solar/power inverters, UPS, SMPS, telecom power supplies, battery management systems, motor control, white goods, power utility meters, and overcurrent fault protection. The device provides a linear analog output voltage, supports eight current ranges up to 65 A, and achieves a total output error of less than 1.0% full-scale. With a 300 ns output response time and immunity to common mode fields, the CT425 is designed for reliable performance. It is offered in an industry-standard, green, and RoHS-compliant 8-lead SOIC package.
Product Attributes
- Brand: Allegro MicroSystems
- Technology: XtremeSense TMR
- Package: 8-lead SOIC
- Certifications: UL/IEC 62368-1, UL1577, IEC 61000-4-5, AEC-Q100 Grade 1
- Compliance: Green, RoHS compliant
Technical Specifications
| Model/Specification | Details |
|---|---|
| Product Name | CT425 |
| Current Carrying Conductor (CCC) Max Current | Up to 65 A |
| Total Output Error (EOUT) | < 1.0% Full-Scale (FS) |
| Output Response Time | 300 ns |
| Bandwidth | 1 MHz |
| Supply Voltage | 4.75 to 5.50 V |
| Current Consumption | ~6.0 mA |
| Common Mode Field Rejection Ratio (CMFRR) | -54 dB |
| Noise (eN) @ fBW = 100 kHz | 9.0 to 13.5 mARMS |
| Rated Isolation Voltage (VISO) | 4 kVRMS |
| Working Voltage for Basic Isolation | 701 VRMS |
| Working Voltage for Reinforced Isolation | 344 VRMS |
| Operating Temperature Range | 40C to 125C |
| Package Dimensions (SOIC-8) | 4.89 mm 6.00 mm 1.62 mm |
| Available Current Ranges | 0 to 20 A, 20 A, 0 to 30 A, 30 A, 0 to 50 A, 50 A, 0 to 65 A, 65 A |
| Part Number Example (20A, Unidirectional) | CT425-HSN820DR |
| Part Number Example (20A, Bidirectional) | CT425-HSN820MR |
| Part Number Example (AEC-Q100, 20A, Unidirectional) | CT425-ASN820DR |
| Part Number Example (AEC-Q100, 20A, Bidirectional) | CT425-ASN820MR |
| Power-On Time (tON) | 100 s |
| Rise Time (tRISE) | 200 ns |
| Propagation Delay (tDELAY) | 250 ns |
| Undervoltage Lockout (UVLO) | 2.45 V (Falling), 2.50 V (Rising) |
| Primary Conductor Resistance (RIP) | 0.5 m (Typical) |
| Output Current (IOUT) Max Drive Capability | 1.0 mA |
| Output Voltage Linear Range (Typical) | 0.50 to 4.50 V |
2408081048_ALLEGRO-CT425-HSN820DR_C22392772.pdf
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