Diodes Incorporated ZXCT1083E5TA

Overview

ZXCT1083E5TA from Diodes Incorporated is a precision high-side unipolar current monitor IC in SOT25 package, designed for non-invasive load current sensing without ground-plane disruption. It operates with 2.7V to 40V common-mode input range, delivers 200 µA/V transconductance, maintains ±0.2 mV input offset voltage (typ), and draws only 0.6 µA quiescent current - enabling accurate, low-error monitoring in automotive power distribution and industrial 24–28V rail systems.

For engineers reviewing the ZXCT1083E5TA datasheet, ZXCT1083E5TA pinout, ZXCT1083E5TA application, or ZXCT1083E5TA equivalent, key selection considerations include its 40V max common-mode rating, external gain-setting resistor architecture (RG/RGT), AEC-Q100 Grade 1 qualification, -40°C to +125°C operation, and current-output topology requiring external load resistor for voltage conversion.

Technical Context

The ZXCT1083 functions as a high-side current-to-current transducer using an internal voltage-controlled current source. Its input stage accepts differential sense voltages up to ±800 mV while rejecting common-mode voltages from 2.7V to 40V independently of VCC, enabling direct placement between supply and load. The output is a proportional current (IOUT = GT × VSENSE) referenced to S−, not ground.

Gain is set externally via two resistors: RG defines transconductance (200 µA/V nominal), and RGT establishes bias current matching across S+ and S− inputs to minimize offset drift. This architecture supports bandwidth optimization - 500 kHz at G = 25, 200 kHz at G = 50 - and achieves 80–100 dB PSRR and CMRR over temperature and supply variation.

Key Specifications

Pinout & Package

SOT25 (5-pin SC-74A) package: 2.8 mm × 1.6 mm × 1.1 mm body, gull-wing leads, 0.95 mm pitch. RoHS-compliant, halogen-free, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side current monitor applications.

Compared with MAX4080TASA+, ZXCT1083E5TA offers 125× lower quiescent current and external gain flexibility but requires two external resistors. Against INA240A1QDRQ1, it trades higher voltage headroom and robustness for ultra-low power and cost-sensitive designs in ≤40V domains.

Availability

ZXCT1083E5TA is available at Aetrix Electronics and suitable for automotive battery monitoring, industrial 24V power distribution, and battery management systems requiring stable component supply, AEC-Q100 compliance, and extended temperature operation.

Supply support for ZXCT1083E5TA 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and precision analog solutions.

The ZXCT series targets high-side current sensing in harsh environments, with design focus on automotive-grade accuracy, ultra-low power consumption, and robust common-mode rejection for 12V/24V/40V systems.

FAQ

What is the maximum allowable common-mode voltage for ZXCT1083E5TA?

The ZXCT1083E5TA supports a common-mode input range of 2.7V to 40V - meaning S+ and S− terminals can withstand up to 40V above ground while maintaining specified performance. Absolute maximum ratings allow brief exposure to 45V, but continuous operation must stay within 40V to ensure guaranteed offset, gain, and bandwidth specs.

How is output voltage generated from the current-output pin?

The OUT pin delivers a current (IOUT = GT × VSENSE) referenced to S−, not ground. To obtain a voltage, connect a load resistor (RL) between OUT and either S− (for single-supply operation) or ground (if S− is near ground potential). For example, with RL = 10 kΩ and VSENSE = 100 mV, VOUT ≈ 2.0 V (20 µA × 10 kΩ), assuming nominal GT = 200 µA/V.

Does ZXCT1083E5TA require external compensation components?

No external compensation is required for stability. The device is internally compensated for unity-gain stability across its full operating range. Bandwidth is determined solely by external RG and RGT values - increasing RG reduces bandwidth (e.g., 500 kHz at G = 25, 200 kHz at G = 50) without risk of oscillation.

Can ZXCT1083E5TA measure bidirectional current?

No - ZXCT1083E5TA is a unidirectional high-side current monitor optimized for positive current flow from S+ to S−. It does not support reverse current detection or bipolar operation. For bidirectional sensing, consider the ZXCT1082 (same family, identical pinout) or dedicated bidirectional monitors like INA226.