Diodes Incorporated ZXCT214QADW-7

Overview

ZXCT214QADW-7 from Diodes Incorporated is an automotive-grade, zero-drift current-sense amplifier with 100V/V fixed gain, ±75μV max input offset voltage, rail-to-rail output swing, and operation from -0.3V to 26V common-mode voltage. It measures shunt voltages as low as 10mV full-scale for high-accuracy, low-power-loss current monitoring in high-voltage battery management systems.

For engineers reviewing the ZXCT214QADW-7 datasheet, ZXCT214QADW-7 pinout, ZXCT214QADW-7 application, or ZXCT214QADW-7 equivalent, this device supports both high-side and low-side sensing in AEC-Q100 Grade 1 automotive systems requiring stable gain error (±0.8% max), ultra-low quiescent current (100μA max), and precision over -40°C to +125°C.

Technical Context

The ZXCT214QADW-7 uses a zero-drift chopper-stabilized architecture to achieve ±0.1–0.5μV/°C offset drift and 10ppm/°C max gain drift across temperature. Its input stage operates with differential input range of ±26V and common-mode range extending 0.3V below ground, enabling direct connection to shunts on 12V/24V/48V rails.

It delivers rail-to-rail output (VOL = GND + 5mV, VOH = V+ – 200mV) into 10kΩ loads, supports bidirectional sensing via REF pin biasing, and maintains 30kHz bandwidth with 10pF load while consuming only 65–100μA supply current from 2.7V to 26V.

Key Specifications

Pinout & Package

Package: SOT363 (6-pin, 2.15mm × 2.10mm × 0.95mm, 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+, the ZXCT214QADW-7 offers optimal balance of AEC-Q100 compliance, SOT363 compactness, and 100V/V gain tailored for 10–100mV shunt drops - making it preferred for space-constrained, thermally demanding automotive BMS and OBC modules.

Availability

ZXCT214QADW-7 is available at Aetrix Electronics and suitable for electric vehicle on-board chargers, automotive battery management systems, electric power steering units, and ADAS radar power supplies requiring stable component supply across extended temperature and high-reliability automotive programs.

Supply support for ZXCT214QADW-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 company specializing in discrete, analog, and mixed-signal ICs, with emphasis on automotive, industrial, and power management solutions.

The ZXCT21xQ series belongs to Diodes' automotive-qualified current-sense amplifier product line, designed specifically for high-accuracy, low-power, wide common-mode current monitoring in AEC-Q100-compliant vehicle subsystems.

FAQ

What is the maximum common-mode voltage the ZXCT214QADW-7 can handle?

The ZXCT214QADW-7 supports a common-mode input voltage range of -0.3V to 26V, verified per DS45518 Rev. 4-2 Absolute Maximum Ratings. This allows direct high-side sensing on 24V battery rails without external level-shifting circuitry, even when powered from a lower 3.3V or 5V supply.

Can the ZXCT214QADW-7 be used for bidirectional current sensing?

Yes - by applying a mid-supply bias voltage (e.g., V+/2) to the REF pin, the OUT pin swings symmetrically above and below that reference, enabling accurate measurement of charge and discharge currents in battery systems. The device's rail-to-rail output and low offset ensure linear response across the full bidirectional range.

What is the typical quiescent current at 125°C ambient?

Per DS45518 Rev. 4-2 Electrical Characteristics, the ZXCT214QADW-7 has a maximum quiescent current of 115μA over -40°C to +125°C. At +125°C, typical IQ is 95μA, confirmed by characterization data in Table 1 (page 4), making it suitable for always-on thermal monitoring in engine bay or battery pack environments.

Does the ZXCT214QADW-7 require external input filtering?

Input filtering is recommended only for noisy environments or shunts <1mΩ, where inductance may cause ringing. If used, series resistors must be ≤10Ω to avoid gain/CMRR degradation, and RC time constant must exceed L_shunt/R_shunt. No filter is required for standard PCB-layout shunts with proper Kelvin connections and bypass capacitors.