Datasheet CT4022 (Allegro)

CT4022 and CT4032 XtremeSense™ TMR Current Sensor with High dV/dt Immunity and Common-Mode Field Rejection FEATURES AND BENEFITS DESCRIPTION
• High operating 500 kHz bandwidth for fast control loops The CT4022/32 is a highly linear, XtremeSense™ TMR-based or where high-speed currents are monitored current sensor. The tunneling magnetoresistive (TMR) sensor • High performance for optimized energy applications is differential, which enables common-mode field rejection • Ratiometric operation to cancel out stray magnetic fields. The primary conductor • Differential sensing rejects common-mode fields resistance is only 1 mΩ, which enables the sensor to withstand • No magnetic hysteresis high inrush current and to minimize power loss. The current • 3.3 V or 5 V supply voltage variants applied to the pin of the primary conductor generates an • Low 1 mΩ primary conductor resistance for low power internal differential magnetic field. The TMR sensor provides dissipation and high-inrush current capability a proportional voltage to the differential magnetic field while • Optimized for high dV/dt applications rejecting common-mode stray magnetic fields. • UL 62368-1 (edition 3) certification (pending), highly The pins of the primary conductive path and the sensor leads isolated compact surface mount packages are galvanically isolated. This enables high-side current sensing • High-withstand surge power ratings without the need for additional isolation techniques. • Wide operating temperature, –40°C to 125°C The CT4022/32 is offered in an industry-standard 8-pin small- • Available in SOIC-8 (CT4022) and SOICW-16 outline integrated circuit (SOIC) package (CT4022) and a 16-pin (CT4032) packages wide SOIC (SOICW) package (CT4032). Both packages are • AEC-Q100 Grade 1, automotive qualified (-A variants green and RoHS compliant. The small and low-profile footprint only) are well-suited for space-constrained applications.
PACKAGE APPLICATIONS
8-pin SOIC (SOIC-8) 16-pin SOICW (SOICW-16) • Motor control • Power inverters • Uninterruptible power supply (UPS), switched-mode power supply (SMPS), and telecom power supply • Consumer and enterprise electronics Not to scale Not to scale VDD 1 8 1 16 IP+ VDD IP+ NC +IP CT4022 2 IP+ CT4032 GND 15 2 7 IP+ VOUT VOUT 3 IP+ NC 14 IP CBYPASS 3 6 4 13 IP– NC IP+ NC –IP IP 5 IP- VOUT 12 VOUT 4 5 IP– GND 6 IP- 11 NC VDD 7 IP- 10 VDD 8 IP- 9 NC CBYPASS
Figure 1: Typical Application Circuit of CT4022 (left) and CT4032 (right) The CT4022/32 outputs an analog signal, VOUT, that varies linearly with the primary current, IP , within the specified ranges.
CT4022/32-SF, Rev. 2 March 27, 2025 Short-Form Datasheet • Content has been removed. MCO-0001861 For the complete datasheet, contact Allegro.