1MHz Bandwidth Contactless Current Sensor with Common Mode Field Rejection and <1% Total Error

CT453

CT452: 1MHz Bandwidth Contactless Current Sensor with Common Mode Field Rejection and <1% Total Error Product Image

These parts are in production but have been determined to be NOT FOR NEW DESIGN.

This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available.

We recommend the CT455 or CT456 as a replacement part.

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Description

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Typical Applications

Packaging

The CT453 (3.3V) is a high bandwidth and low noise integrated zero-loss contactless current sensor that uses Allegro MicroSystems’ patented XtremeSense™ TMR technology to enable high accuracy current measurements for many consumer, enterprise, and industrial applications. It supports fixed and programmable field ranges where the CT453 senses and translates the magnetic field into a linear analog output voltage. It achieves a total error output better than ±1.0% over voltage and temperature.

This coreless current sensor is not only small in size and simple to design but it also provides effective common mode field rejection of more than -50 dB. This enables the CT453 to have greater than 90% immunity to stray magnetic fields thus having almost no impact on the accuracy of the current measurement.

The CT453 has less than 300 ns output response time while the current consumption is about 6.0 mA. The CT453 is housed in an industry standard 8-lead SOIC package and a very low profile, 8-lead TSSOP package that is both “green” and RoHS compliant.

CT453 (3.3 V version)
Integrated Contactless Current/Field Sensor
Linear Analog Output Voltage
Common Mode Field Rejection: -50 dB
Total Error Output: ≤ ±1.0%, -40°C to +125°C
1 MHz Bandwidth
Response Time < 300 ns
VOUT – VREF Error < 1.0% FS (Max)
High Signal-to-Noise Ratio (SNR): .65 dB
Supply Voltage: 4.75 V to 5.50 V
Filter Pin to Reduce Noise on Output
AEC-Q100 Grade 1
Package Options
- 8-lead SOIC
- 8-lead TSSOP

The CT453 is housed in an industry standard 8-lead SOIC package and a very low profile, 8-lead TSSOP package that are both "green" and RoHS compliant.

CT453: 1MHz Bandwidth Contactless Current Sensor with Common Mode Field Rejection and <1% Total Error Functional Block Diagram

CT453: 1MHz Bandwidth Contactless Current Sensor with Common Mode Field Rejection and <1% Total Error Typical Application Diagram

Documentation and Resources

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Documents Found: 32

Document Type	Document Name
Application Note	Glossary of Isolation-Related Terms for Integrated Current Sensors
Application Note	CT452/CT453 Slit Busbar Design