Diodes Incorporated ZXCT210QADW-7

Overview

ZXCT210QADW-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 -0.3V to 26V common-mode input range. It measures low-side or high-side shunt voltages as small as 10mV full-scale with ±0.5% max gain error (C version), enabling accurate large-current sensing in EV battery management and motor control systems.

For engineers reviewing the ZXCT210QADW-7 datasheet, ZXCT210QADW-7 pinout, ZXCT210QADW-7 application, or ZXCT210QADW-7 equivalent, this device supports rail-to-rail output, operates from 2.7V–26V supply at ≤100μA quiescent current, and delivers 14kHz bandwidth with 25nV/√Hz input voltage noise for high-fidelity current feedback in AEC-Q100 Grade 1 environments.

Technical Context

The ZXCT210QADW-7 employs a zero-drift chopper-stabilized amplifier architecture with post-trim calibration to achieve ±30μV max input offset and 0.1–0.5μV/°C offset drift over -40°C to +125°C. Its differential input stage rejects common-mode voltages up to 26V while powered from as low as 2.7V, enabling direct sensing on high-voltage rails without level-shifting.

It features rail-to-rail output swing (within 50mV of V+ and 5mV of GND), 100dB CMRR (typ), and 10ppm/°C max gain drift - all specified across full automotive temperature range. The REF pin allows configurable unidirectional or bidirectional current sensing by setting output bias point relative to V+ or external reference.

Key Specifications

Pinout & Package

Package: 6-pin SOT363 (2.2mm × 2.1mm × 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 current sensing applications.

Compared with INA240A1QDRQ1 and MAX40056ATA+T, the ZXCT210QADW-7 uniquely balances ultra-low quiescent current (100μA), automotive temperature robustness (-40°C to +125°C), and flexible REF-based bidirectional sensing - making it optimal for always-on, safety-critical EV subsystems where power, precision, and configurability are jointly constrained.

Availability

ZXCT210QADW-7 is available at Aetrix Electronics and suitable for electric vehicle on-board chargers, automotive battery management systems, and ADAS radar power monitoring requiring stable component supply across extended product lifecycles.

Supply support for ZXCT210QADW-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 computing markets.

The ZXCT21xQ series belongs to Diodes' automotive-qualified precision analog portfolio, designed specifically for high-reliability current sensing in AEC-Q100 Grade 1 environments such as EV powertrain and chassis control systems.

FAQ

What is the maximum common-mode voltage the ZXCT210QADW-7 can tolerate?

The ZXCT210QADW-7 supports a common-mode input range of -0.3V to 26V, verified per DS45518 Rev. 4-2 Absolute Maximum Ratings. This allows direct high-side sensing on 24V automotive batteries and 48V mild-hybrid rails without external level-shifting circuitry, provided the supply voltage (V+) is ≥2.7V and ≤26V.

Does the ZXCT210QADW-7 require external components for stable operation?

Yes - a 100nF ceramic bypass capacitor between V+ and GND is mandatory per the datasheet's Application Information section. Additional 10Ω input resistors (RS) and 0.01–0.1μF capacitors (CF) may be added for shunt inductance compensation in noisy high-dI/dt applications, but RS must not exceed 10Ω to avoid gain error from input bias current mismatch.

How does the REF pin enable bidirectional current sensing?

The REF pin sets the output voltage baseline: when biased to V+/2, the OUT pin swings symmetrically above and below that point as current flows in either direction through the shunt. This allows single-supply ADCs to resolve both charge and discharge currents in BMS applications, provided the REF source has low impedance (<1kΩ) and stays within GND–0.3V to V++0.3V.

Is the ZXCT210QADW-7 pin-compatible with other ZXCT21xQ variants?

Yes - all ZXCT21xQ devices share identical SOT363 pinout and footprint. Substituting ZXCT210QADW-7 (200V/V) with ZXCT211QBDW-7 (500V/V) or ZXCT214QCDW-7 (100V/V) requires only gain-resistor and layout adjustments; no PCB redesign is needed, though REF biasing and output scaling must be revalidated for target full-scale shunt voltage.