Product Overview
The Allegro CT425 is a high-bandwidth, ultra-low noise integrated contact current sensor utilizing XtremeSense TMR technology for high-accuracy current measurements. It offers a linear analog output voltage, supporting eight current ranges up to 65 A with a total output error of less than 1.0% full-scale. The device features a 300 ns output response time, low current consumption, and immunity to common mode fields. It is suitable for various industrial, consumer, and automotive 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 CT425 is offered in an 8-lead green and RoHS-compliant SOIC package.
Product Attributes
- Brand: Allegro MicroSystems
- Technology: XtremeSense TMR
- Package Type: 8-lead SOIC
- Compliance: Green, RoHS compliant, AEC-Q100 Grade 1
- Certifications: UL/IEC 62368-1 and UL1577
Technical Specifications
| Model/Part Number | Current Range (IPMAX) | Sensitivity (mV/A) | Bandwidth | Response Time | Total Output Error | Supply Voltage | Operating Temperature | Package Dimensions (mm) |
|---|---|---|---|---|---|---|---|---|
| CT425-HSN820MR / CT425-ASN820MR | 20 A | 100 | 1 MHz | 300 ns | 1.0% FS | 4.75 to 5.50 V | 40 to 125 C | 4.89 6.00 1.62 |
| CT425-HSN830MR / CT425-ASN830MR | 30 A | 66.7 | 1 MHz | 300 ns | 1.0% FS | 4.75 to 5.50 V | 40 to 125 C | 4.89 6.00 1.62 |
| CT425-HSN850MR / CT425-ASN850MR | 50 A | 40 | 1 MHz | 300 ns | 1.0% FS | 4.75 to 5.50 V | 40 to 125 C | 4.89 6.00 1.62 |
| CT425-HSN865MR / CT425-ASN865MR | 65 A | 30.8 | 1 MHz | 300 ns | 1.0% FS | 4.75 to 5.50 V | 40 to 125 C | 4.89 6.00 1.62 |
| CT425-HSN820DR / CT425-ASN820DR | 0 to 20 A | 200 | 1 MHz | 300 ns | 1.0% FS | 4.75 to 5.50 V | 40 to 125 C | 4.89 6.00 1.62 |
| CT425-HSN830DR / CT425-ASN830DR | 0 to 30 A | 133.3 | 1 MHz | 300 ns | 1.0% FS | 4.75 to 5.50 V | 40 to 125 C | 4.89 6.00 1.62 |
| CT425-HSN850DR / CT425-ASN850DR | 0 to 50 A | 80 | 1 MHz | 300 ns | 1.5% FS (0-50A) | 4.75 to 5.50 V | 40 to 125 C | 4.89 6.00 1.62 |
| CT425-HSN865DR / CT425-ASN865DR | 0 to 65 A | 61.5 | 1 MHz | 300 ns | 1.5% FS (0-65A) | 4.75 to 5.50 V | 40 to 125 C | 4.89 6.00 1.62 |
| Isolation Ratings: Impulse Withstand Voltage (VIMPULSE): 5000 VPK Dielectric Withstand Voltage (VISO): 3500 VRMS Working Voltage for Basic Isolation (VWVBI): 560 VRMS Working Voltage for Reinforced Isolation (VWBRI): 280 VRMS Creepage Distance (DCR): 4 mm Clearance Distance (DCL): 4 mm Distance Through Isolation (DTI): 110 m | ||||||||
| Electrical Characteristics: Supply Current (ICC): 6.0 mA (typ.) Power-On Time (tON): 100 s (typ.) Rise Time (tRISE): 200 ns (typ.) Propagation Delay (tDELAY): 250 ns (typ.) Undervoltage Lockout (VUVLO): 2.45 V (falling) / 2.50 V (rising) | ||||||||
Note: The CT425 is classified as NOT FOR NEW DESIGN. Sale is restricted to existing customer applications. Obsolescence in the near future is probable. Samples are no longer available.
2504181641_ALLEGRO-CT425-HSN820MR_C22460714.pdf
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