Diodes Incorporated ZXCT180QA1W5-7

Overview

ZXCT180QA1W5-7 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive current shunt monitor configured for unidirectional low-side and high-side sensing with 20V/V fixed gain, 400kHz small-signal bandwidth, ±1% max gain error over –40°C to +125°C, and operation from 2.7V to 5.5V supply. It measures shunt voltages across –0.3V to 26V common-mode range while consuming ≤370μA quiescent current-enabling precise motor current feedback in e-pump control systems.

For engineers reviewing the ZXCT180QA1W5-7 datasheet, ZXCT180QA1W5-7 pinout, ZXCT180QA1W5-7 application in automotive body control or fault detection, or ZXCT180QA1W5-7 equivalent for 20V/V gain current monitoring, this page delivers verified specifications, validated SOT25 pin mapping, real-world use cases, and cross-reference alternatives aligned with AEC-Q100 production requirements.

Technical Context

The ZXCT180QA1W5-7 implements a precision current-sense amplifier topology with rail-to-rail output stage and internal resistor network setting fixed 20V/V gain. Its input stage operates independently of supply voltage, enabling accurate measurement of shunt voltage drops at up to 26V common-mode-even when VS = 2.7V.

It achieves 400kHz bandwidth at 20V/V gain with 2V/µs slew rate and ±100μV typical offset (±400μV max over temperature), supporting fast transient current detection in safety-critical automotive subsystems such as valve actuation and battery charging supervision.

Key Specifications

Pinout & Package

Package: 5-pin SOT25 (3.0mm × 1.6mm × 1.1mm), RoHS-compliant, halogen-free, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional current monitoring applications.

Compared with INA240A1QDRQ1 and MAX40056ATA+, the ZXCT180QA1W5-7 offers superior common-mode range (26V vs. 16V/26V), lower offset drift (1μV/°C vs. 2.5μV/°C), and tighter gain error (±1% vs. ±0.5%/±1.5%), making it optimal for cost-sensitive AEC-Q100-compliant 24V systems requiring high accuracy at temperature extremes.

Availability

ZXCT180QA1W5-7 is available at Aetrix Electronics and suitable for vehicle motor controls, body control modules, and wireless charging systems requiring stable component supply under IATF16949-certified traceability and PPAP support.

Supply support for ZXCT180QA1W5-7 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 ISO/TS 16949 and IATF16949 certified facilities.

The ZXCT180Q product line delivers AEC-Q100-qualified current sense amplifiers optimized for high-accuracy, low-power, wide common-mode monitoring in automotive powertrain and body electronics.

FAQ

What is the maximum common-mode voltage the ZXCT180QA1W5-7 can measure?

The ZXCT180QA1W5-7 supports a common-mode input voltage range of –0.3V to 26V, independent of its 2.7V–5.5V supply voltage. This allows direct sensing across shunts in 24V automotive systems-even when the device's VS pin is powered from a lower-voltage domain like 3.3V or 5V. The input stage remains functional and accurate at 26V, verified per Absolute Maximum Ratings and Recommended Operating Conditions in DS46640 Rev. 1–2.

Does the ZXCT180QA1W5-7 require external resistors for gain setting?

No. The ZXCT180QA1W5-7 has internally trimmed resistors that fix the gain at 20V/V (Pinout A1 configuration). Unlike programmable current sense amplifiers, it eliminates external gain-setting components, reducing PCB area, bill-of-materials count, and calibration uncertainty. This is confirmed in the Pin Assignments and Electrical Characteristics tables of DS46640, where gain is specified as "20 V/V" with no external resistor dependency.

How does the rail-to-rail output benefit system design?

The rail-to-rail output delivers voltage from GND + 0.0005V to VS – 0.02V across –40°C to +125°C, maximizing signal swing into 3.3V or 5V ADCs without external op-amp buffering. This preserves resolution-e.g., a 12-bit ADC sees ~1.3mV LSB step instead of ~2.5mV with limited swing-and avoids clipping during peak current events, directly improving measurement fidelity in motor control loops.

Is the ZXCT180QA1W5-7 qualified for under-hood automotive use?

Yes. It is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient), manufactured in IATF16949-certified facilities, and PPAP-capable. Its 26V common-mode tolerance, 370μA max quiescent current, and 5kV HBM ESD rating meet stringent requirements for engine control units, transmission controllers, and other under-hood modules documented in Diodes' Automotive Product Definitions and DS46640 Section 1.