Diodes IncorporatedZXCT210QADW-7Stromversorgungsregler und -monitore

26V, Zero-Drift, High-Precision Current Monitor

The automotive-compliant ZXCT21xQ current monitor family are single-stage instrumentation amplifiers designed to accurately measure very small sense voltages across a wide range of commonmode voltages.

Applications include current sensing of power rail/load currents in BLDC motor control, high-power DC-DC converters, realtime reporting of state-of-health in critical equipment, and battery-charging equipment. Their low offset voltage (±30μV) with zerodrift core (typical ±100nV/ºC) enables current sensing across the shunt with maximum full-scale voltage drops as low as 10mV. This allows the use of small-value sense resistors to monitor large currents to reduce a power loss caused by the measurement.

The ZXCT21xQ family has six fixed voltage gain options in 50V/V, 75V/V, 100V/V, 200V/V, 500V/V, and 1000V/V. They can measure voltage across shunts at commonmode voltages from -0.1V to 26V, independent of supply voltage. These devices operate from a 2.7V to 26V power supply, independent of commonmode sense voltage, consuming a maximum of 100μA supply current.

All versions are AEC-Q100 grade 1 qualified, supports a -40ºC to +125ºC temperature range, and are available in the industry-standard SOT363 package.

Key Features and Benefits

• DIODES Advantage:
• •  Offset Voltage as Low as ±30µV
• •  Minimizes errors when using low-value sense resistors
• •  Gain Error as Low as 0.5%
• •  Maintains accurate gain control across temperature and common-mode voltage
• •  Common-Mode Range -0.1 to 26V
• •  Accurately measures high-side and low-side currents, including short-circuited loads
• •  Wide Operating Voltage Range of 2.7 to 26V
• •  Provides options for powering separately or from monitored supply
• •  Robust ESD Capability (HBM: 5kV, CDM: 1.5kV)
• •  Improves system reliability

Applications

• Current sensing in:
• •  BLDC motor controls
• •  E-compressors
• •  ADAS power supplies
• •  EV on-board charger (OBC)
• •  xEV high-voltage DC-DC converters
• •  Valve controls
• •  Body control modules
• •  USB and wireless charging
• •  BMS charging and discharging

Related Products

ZXCT210Q