ZXCT21x High-Precision, Bi-Directional Current Monitors for Accurate High-Side and Low-Side Current Measurement These high-precision current monitors support large current measurement with small VSENSE resistors and voltages. ■ Offset Voltage as Low as 30pV Minimizes errors when using low-value sense resistors ■ Gain Error as Low as 0.5% Maintains accurate gain control across temperature and commonmode voltage ■ Common Mode Range -0.3V to 26V Accurately measures high-side and low-side currents, including short-circuited loads ■ Wide Operating Voltage Range: 2.7V to 26V Provides options for powering separately or from monitored supply ■ Robust ESD Capability (HBM: 5kV, CDM: 1.5kV) Improves system reliability The ZXCT21x current monitor series are single-stage instrumentation amplifiers designed to accurately measure very small sense voltages across a wide range of common-mode voltages up to 26V. Their applications include current sensing of load/rail currents in BLDC motor control, telecom power, solar inverters, and battery charged equipment. The ZXCT21x's low offset voltage (30pV) with zero-drift core (100nV/°C) enables it to achieve high-precision current sensing, with maximum drops across the shunt resistor, to as low as 10mV full scale. This allows the use of small-value sense resistors to monitor large currents, thus reducing power loss caused by the measurement. The series has six fixed voltage gain options in 50V/V, 75V/V, 100V/V, 200V/V, 500V/V, and 1000V/V. The devices measure voltage across the shunt at common-mode voltages from -0.3V to 26V, independent of supply voltage. These devices operate from a 2.7V to 26V power supply with a maximum 100pA supply current. In addition, a REF pin enables bi-directional current flow measurement capability. All versions are available in the very small U-QFN1418-10 and SOT363 packages and support a -40°C to +125°C ambient temperature range. Applications ■ Notebook computers ■ Server farms ■ Telecoms ■ Instrumentation The Diodes logo is a registered trademark of Diodes Incorporated in the United States and other countries © 2023 Copyright Diodes Incorporated. All Rights Reserved. ■ Battery charging and discharging ■ High-performance video cards ■ Industrial power supplies ■ Current sensing (high-side/low-side)

Typical Application Part Number Operating Temperature Range Ordering Information Orderable Part Number Packing Carrier 7” Tape & Reel 7” Tape & Reel 7” Tape & Reel 7” Tape & Reel 7” Tape & Reel 7” Tape & Reel