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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Current Regulation/Management

Diodes Incorporated ZXCT1085E5TA

Name: ZXCT1085E5TA
Brand: Diodes Incorporated
SKU: ZXCT1085E5TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXCT1085E5TA

Manufacturer:: Diodes Incorporated

Category:: Current Regulation/Management

Package:: SC-74A, SOT-753

Datasheet:: ZXCT1085E5TA.pdf

Description:: IC CURRENT MONITOR SOT25

Quantity:: RFQ Add To RFQ list

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Inventory:5,645

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Product details

Overview

ZXCT1085E5TA from Diodes Incorporated is a precision high-side current monitor IC with fixed 25× voltage gain, designed for unipolar load current sensing in high-common-mode-voltage systems up to 40V. It features 0.6µA quiescent current, ±0.2mV input offset voltage (typ), 80–100dB PSRR/CMRR, and operates across –40°C to +125°C. Used in automotive battery management and industrial 24V rail overcurrent monitoring.

For engineers reviewing the ZXCT1085E5TA datasheet, ZXCT1085E5TA pinout, ZXCT1085E5TA application, or ZXCT1085E5TA equivalent, key selection criteria include its 40V max common-mode range, SOT25 package compatibility, fixed-gain voltage-output architecture, and AEC-Q100 Grade 1 qualification for automotive reliability.

Technical Context

The ZXCT1085E5TA implements a high-side current sense amplifier with differential input stage referenced to VS+ and VS−, delivering a ground-referenced voltage output proportional to sensed differential voltage (V_SENSE). Its internal architecture eliminates ground-plane disruption and supports operation with supply and common-mode voltages decoupled.

It uses a fixed transimpedance-to-voltage conversion with nominal gain of 25 V/V, optimized for 0–500mV input range and delivering 0–12.5V output swing relative to VS−. Input bias currents remain below 5µA across temperature, enabling accurate low-current sensing without external compensation.

Key Specifications

Parameter	Value and Actual Design Meaning
Common-Mode Input Range	2.7V to 40V - enables direct sensing on 24V/28V industrial and automotive rails without level-shifting.
Fixed Voltage Gain	25 V/V - provides precise, stable scaling of 10–500mV sense voltage to 0.25–12.5V output for ADC interfacing.
Input Offset Voltage	±0.2 mV (typ) - ensures ≤0.8% full-scale error at 25mV sense input, critical for low-current accuracy.
Quiescent Current	0.6 µA - minimizes system power overhead and self-heating drift in always-on monitoring circuits.
PSRR / CMRR	80–100 dB - rejects supply and common-mode noise in electrically noisy environments like engine bays or motor drives.
Operating Temperature	–40°C to +125°C - meets extended industrial and AEC-Q100 Grade 1 requirements for under-hood deployment.
Package	SOT25 - surface-mount 5-pin package with 0.95mm lead pitch, compatible with standard reflow and automated assembly.

Pinout & Package

SOT25 package: 5-pin, small-outline transistor outline with gull-wing leads; body dimensions 2.80 × 1.60 × 0.38 mm (L × W × H); thermal pad not present.

Pin/Terminal	Circuit Role	Design Meaning
1 (OUT)	Voltage output terminal	Delivers V_OUT = 25 × V_SENSE; referenced to GND; drives ADC inputs or comparator thresholds directly.
2 (GND)	Analog ground reference	Return path for internal circuitry and output stage; must be connected to system ground plane with low-impedance trace.
3 (S+)	Positive current-sense input	Connected to high-side of shunt resistor (VSUPPLY side); withstands up to +45V absolute max voltage.
4 (S−)	Negative current-sense input	Connected to low-side of shunt resistor (VLOAD side); common-mode range extends down to –0.3V.
5 (VCC)	Analog supply input	Provides power to internal amplifier; accepts 2.7–40V; independent of S+/S− common-mode voltage.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualified	Validated for automotive applications requiring operation from –40°C to +125°C ambient with robust HTOL and TC testing.
Wide common-mode input range	2.7V to 40V allows direct integration into 24V/28V industrial and 12V/24V automotive power domains without attenuation or isolation.
Low quiescent current	0.6µA enables always-on current monitoring in battery-backed or energy-constrained systems without measurable drain.
High PSRR and CMRR	≥80 dB rejection of supply ripple and common-mode transients ensures stable output under load switching or EMI exposure.
Fixed 25× gain architecture	Eliminates external gain-setting resistors, reducing BOM count, layout sensitivity, and calibration complexity vs. adjustable variants.

Applications

Automotive Battery Monitoring

Industrial 24V Rail Protection

Use Scenario: Real-time monitoring of starter battery charge/discharge current in 12V vehicle electrical systems.

IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt voltage to scaled analog output for MCU ADC sampling.

Use Value: Enables accurate state-of-charge estimation and overcurrent cutoff at ≤10A with <1% gain error and no ground loop interference.

Use Scenario: Continuous current supervision of PLC I/O module power rails operating from 24V DC supplies.

IC Role / Device Role / Timing Role: Precision analog front-end for fault detection, feeding signal to isolated digital isolator or safety controller.

Use Value: Supports fast response (<5µs settling) to short-circuit events while maintaining accuracy across –40°C to +85°C industrial temperature range.

Server PSU Current Sharing

EV Onboard Charger Precharge Monitoring

Use Scenario: Parallel-phase current balancing in redundant AC/DC power supplies for datacenter servers.

IC Role / Device Role / Timing Role: High-side monitor per phase, providing matched gain outputs for analog current averaging or digital correction.

Use Value: 25× fixed gain ensures inter-channel matching within ±1% error, critical for load-sharing stability and thermal derating.

Use Scenario: Measuring precharge current during high-voltage battery connection in EV onboard chargers (OBC).

IC Role / Device Role / Timing Role: Isolated high-side sensor verifying soft-start current ramp before main contactor closure.

Use Value: 40V common-mode rating accommodates 24V control rail while sensing across HV precharge resistor; 0.6µA IQ preserves standby integrity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
INA240A1QDRQ1	Bi-directional sensing, 20V/V gain, higher 2.1mA IQ, SOIC-8 package	Supports reverse current detection; requires larger PCB area and higher supply current	Select when bidirectional measurement or higher bandwidth (>400kHz) is required; not drop-in due to pinout and IQ mismatch
TSC2100IYCT	Unidirectional, 20V/V gain, 1.2µA IQ, SOT23-5 package, no AEC-Q100 grade	Lacks automotive qualification; lower CMRR (70dB) and wider offset (±1mV)	Acceptable for cost-sensitive industrial use where AEC-Q100 and tight offset are non-critical

Compared with INA240A1QDRQ1 and TSC2100IYCT, the ZXCT1085E5TA offers superior quiescent current efficiency and automotive qualification in the same SOT25 footprint, making it optimal for always-on, space-constrained, and safety-compliant high-side monitoring.

Availability

ZXCT1085E5TA is available at Aetrix Electronics and suitable for automotive battery management, industrial 24V rail protection, and EV onboard charger precharge monitoring requiring stable component supply and long-term lifecycle support.

Supply support for ZXCT1085E5TA 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 current monitor product line targets high-side sensing in harsh environments, emphasizing ultra-low IQ, wide common-mode range, and AEC-Q100 compliance for automotive and industrial power systems.

FAQ

What is the maximum allowable common-mode voltage for ZXCT1085E5TA?

The ZXCT1085E5TA supports a common-mode input voltage range of 2.7V to 40V. Its absolute maximum ratings specify –0.3V to +45V on S+ and S− pins. This allows safe operation on 24V industrial rails and 12V/28V automotive systems, including transient overvoltage conditions up to 45V.

Can ZXCT1085E5TA measure bidirectional current?

No. The ZXCT1085E5TA is a unidirectional high-side current monitor optimized for positive current flow from S+ to S−. It does not support reverse current detection or negative V_SENSE inputs. For bidirectional sensing, consider alternatives such as the INA240 series, which explicitly specify symmetric ±V_SENSE capability.

How does the 25× fixed gain impact interface with a 3.3V ADC?

With 25× gain, the ZXCT1085E5TA produces 0–12.5V output for 0–500mV input. To interface with a 3.3V ADC, a precision resistive divider (e.g., 10kΩ/2.7kΩ) is required to scale output to 0–3.3V. The device's low output impedance (125kΩ) ensures minimal loading error when paired with standard op-amp buffer or high-Z ADC inputs.

Is external filtering required for reliable operation in noisy automotive environments?

While the ZXCT1085E5TA provides ≥80dB PSRR and CMRR, layout best practices are essential: place the device close to the sense resistor, use Kelvin connections for S+/S−, route VCC with local 100nF ceramic decoupling, and avoid routing sensitive traces near switching nodes. No additional RC filter is mandated, but a 100pF capacitor from OUT to GND may improve HF noise immunity if observed in system validation.

ZXCT1085E5TA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Current Monitor

Sensing Method:: High-Side

Accuracy:: -

Voltage - Input:: 2.7V ~ 40V

Current - Output:: -

Operating Temperature:: -40°C ~ 125°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-25

ZXCT1085E5TA FAQ

1.How can I place an order for ZXCT1085E5TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXCT1085E5TA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ZXCT1085E5TA reliable?

The price and inventory of ZXCT1085E5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT1085E5TA is usually 5 days.

3.What payment methods are accepted for ZXCT1085E5TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT1085E5TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXCT1085E5TA?

ZXCT1085E5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXCT1085E5TA order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ZXCT1085E5TA?

For technical support, including ZXCT1085E5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT1085E5TA requirements.

6.How does Aetrix verify that ZXCT1085E5TA is sourced from the original manufacturer or authorized distributors?

All ZXCT1085E5TA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZXCT1085E5TA meets industry standards.

7.What is the process for return or replacement of ZXCT1085E5TA?

All ZXCT1085E5TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT1085E5TA, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ZXCT1085E5TA part is unused and in its original packaging.

Return procedure for ZXCT1085E5TA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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