Diodes Incorporated ZXCT210QBDW-7

Overview

ZXCT210QBDW-7 from Diodes Incorporated is an automotive-grade, zero-drift, high-precision current-shunt monitor with 200V/V fixed gain, ±30μV max offset voltage, and rail-to-rail output. It operates from 2.7V to 26V supply, supports -0.3V to 26V common-mode input range, and delivers <0.8% gain error over -40°C to +125°C - enabling accurate 10mV shunt-based current sensing in high-voltage EV power stages like OBC and BMS.

For engineers reviewing the ZXCT210QBDW-7 datasheet, ZXCT210QBDW-7 pinout, ZXCT210QBDW-7 application, or ZXCT210QBDW-7 equivalent, this device is selected for AEC-Q100 Grade 1 automotive systems requiring low-drift, high-CMRR (≥95dB), and minimal power loss at full-scale shunt voltages - especially where supply headroom is constrained and temperature stability is critical.

Technical Context

The ZXCT210QBDW-7 implements a zero-drift chopper-stabilized amplifier architecture with post-trim calibration, achieving ±30μV max input offset and 0.1–0.5μV/°C offset drift across -40°C to +125°C. Its differential input stage rejects common-mode voltages up to 26V while powered from as low as 2.7V, decoupling measurement accuracy from system rail constraints.

It features rail-to-rail output swing (within 50mV of V+ and 5mV of GND), 14kHz bandwidth, 25nV/√Hz input voltage noise, and 10ppm/°C max gain drift - all optimized for unidirectional or bidirectional current sensing in battery management, motor control, and ADAS power paths where long-term stability and low quiescent current (100μA max) are mandatory.

Key Specifications

Pinout & Package

Package: 6-pin SOT363 (2.15mm × 2.10mm × 0.95mm), RoHS-compliant, halogen-free, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision automotive current sensing applications.

Compared with INA240A1QDRQ1 and MAX40056ATA+T, the ZXCT210QBDW-7 offers superior temperature stability (0.1–0.5μV/°C offset drift vs. 0.2μV/°C and 0.5μV/°C) and ultra-low quiescent current (100μA vs. 1.8mA and 1.2mA), making it optimal for always-on, thermally demanding automotive subsystems where long-term accuracy and power efficiency are prioritized over bandwidth.

Availability

ZXCT210QBDW-7 is available at Aetrix Electronics and suitable for electric vehicle battery management systems, ADAS power monitoring, electric power steering control, and on-board charger current sensing requiring stable component supply across extended temperature and automotive lifecycle demands.

Supply support for ZXCT210QBDW-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with IATF 16949-certified production facilities.

The ZXCT21xQ series is part of Diodes' automotive-qualified precision analog portfolio, designed specifically for high-accuracy, low-power current sensing in AEC-Q100-compliant vehicle subsystems including BMS, EPS, ADAS, and EV power conversion.

FAQ

What is the maximum common-mode voltage the ZXCT210QBDW-7 can tolerate during load dump events?

The ZXCT210QBDW-7 supports a guaranteed common-mode input range of -0.3V to 26V. During automotive load dump transients (ISO 16750-2), the device remains functional as long as the voltage at IN+ and IN− stays within these absolute limits - requiring external clamping if system rails exceed 26V. Its 26V rating aligns with standard 24V vehicle architectures under worst-case regulation.

Can the ZXCT210QBDW-7 be used for bidirectional current sensing without external op-amps?

Yes - by applying a stable bias voltage (e.g., V+/2) to the REF pin, the output swings symmetrically around that reference, enabling bidirectional measurement. The device's rail-to-rail output and low offset (±30μV) ensure accurate zero-crossing detection for battery charge/discharge direction, provided the REF source impedance is <1kΩ and stays within GND −0.3V to V+ + 0.3V.

How does the 10mV full-scale shunt capability impact power dissipation in a 200A motor control application?

At 200A and 10mV full-scale, the shunt resistance is 50μΩ (R = V/I = 0.01V/200A). Power dissipation is I²R = (200A)² × 50μΩ = 2W - significantly lower than conventional 100mΩ shunts (400W). This reduces thermal stress, PCB area, and cooling requirements while maintaining measurement resolution via the 200× gain.

Is the ZXCT210QBDW-7 compatible with ceramic bypass capacitors on V+, and what value is recommended?

Yes - a 100nF X7R ceramic capacitor placed within 2mm of the V+ and GND pins is recommended per the datasheet. This ensures stability across temperature and suppresses high-frequency supply noise that could degrade PSRR (guaranteed ≥100dB at DC). Larger bulk capacitance (e.g., 1–10μF) may be added in parallel for transient suppression, but the 100nF local cap is mandatory for bandwidth control and oscillation prevention.