Allegro CT425 HSN820DR sensor designed for battery management and telecom power supply applications
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 |
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