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

Diodes Incorporated ZXCT1107SA-7

Name: ZXCT1107SA-7
Brand: Diodes Incorporated
SKU: ZXCT1107SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXCT1107SA-7

Manufacturer:: Diodes Incorporated

Category:: Current Regulation/Management

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: ZXCT1107SA-7.pdf

Description:: IC CURRENT MONITOR SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:25,683

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Product details

Overview

ZXCT1107SA-7 from Diodes Incorporated is a high-side unipolar current sense monitor in SOT23-3 package, delivering 4mA/V transconductance with ±1.8% gain accuracy, 3µA quiescent current, and operation across 2.5V–36V common-mode input range. It enables non-intrusive load current measurement in automotive power rails, industrial 24V systems, and battery management without ground-plane disruption.

For engineers reviewing the ZXCT1107SA-7 datasheet, ZXCT1107SA-7 pinout, ZXCT1107SA-7 application, or ZXCT1107SA-7 equivalent, key selection criteria include its single-supply line-powered architecture, SOT23-3 footprint compatibility, differential sense voltage tolerance up to 0.5V, and AEC-Q100 Grade 1 qualification for automotive use.

Technical Context

The ZXCT1107SA-7 uses a current-output transconductance amplifier topology with internal biasing derived solely from the S+ pin-eliminating need for external supply. Its wide 2.5V–36V common-mode range supports direct connection to high-side power rails, while the 0.5V max differential sense voltage ensures precision at low-loss shunt values.

Temperature performance is specified across –40°C to +125°C with 370 ppm/°C output current TC and <0.4 µA/V common-mode rejection error. The device achieves 0.65 MHz small-signal bandwidth with 2.5kΩ gain-setting resistor, enabling fast overcurrent detection in real-time protection circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
Transconductance	4.0 mA/V ±1.8% - defines linear I_OUT = 0.004 × V_SENSE relationship for accurate analog current-to-voltage conversion
Quiescent Current	3 µA - minimizes sensing error in ultra-low-power systems like battery monitors and always-on automotive modules
Common-Mode Input Range	2.5 V to 36 V - supports direct high-side monitoring on 12V/24V/36V rails without level-shifting circuitry
Differential Sense Voltage	0 to 0.5 V - enables use of low-value, low-power shunts (e.g., 20 mΩ at 2 A yields 40 mV) while maintaining accuracy
Operating Temperature	–40°C to +125°C - meets extended industrial and AEC-Q100 Grade 1 requirements for under-hood automotive applications
Output Current Tempco	370 ppm/°C - quantifies worst-case drift in output current over full temperature range, critical for thermal-stable threshold detection
Small-Signal Bandwidth	0.65 MHz - supports response to transient overcurrent events within ~540 ns (10–90%), suitable for fast fault shutdown

Pinout & Package

Package: SOT23-3, surface-mount, lead-free, RoHS-compliant, thermal pad not required. Footprint compatible with JEDEC TO-236AB standard.

Pin/Terminal	Circuit Role	Design Meaning
1 - OUT	Current output terminal	Sinks proportional output current (I_OUT) referenced to system ground; also serves as substrate connection - sets minimum rail voltage to 2.5V + V_OUT
2 - S−	Negative sense input	High-impedance input (19–100 nA leakage) tied to shunt resistor low-side; common-mode tolerant to 36V
3 - S+	Positive sense input & analog supply	Accepts high-side shunt voltage and powers internal circuitry; current varies with V_SENSE, enabling line-powered operation

Key Features

Feature	Design Value
Line-powered architecture	No external V_CC required - powered directly from S+ pin, reducing BOM count and PCB space in compact adapters and modules
Low input bias current	S− leakage ≤100 nA at 25°C - preserves accuracy with high-value shunts (>1 Ω) and minimizes self-heating error
Wide common-mode rejection	0.1–0.4 µA/V CMSR - maintains stable output despite rail fluctuations in noisy industrial 24V environments
AEC-Q100 Grade 1 qualified	Validated for automotive ambient temperatures (–40°C to +125°C) - enables drop-in use in engine control, lighting, and ADAS subsystems
Single-resistor gain programming	R_GAIN sets output voltage scaling - simplifies calibration and supports flexible interface to ADCs, comparators, or microcontroller inputs

Applications

Automotive Load Monitoring

Industrial 24V Power Rail Sensing

Use Scenario: Real-time current monitoring of headlight LED drivers or HVAC blower motors in vehicles.

IC Role / Device Role / Timing Role: High-side current mirror providing isolated analog output proportional to load current for ECU fault diagnostics.

Use Value: Enables compliance with ISO 16750-2 pulse test requirements via 36V common-mode tolerance and AEC-Q100 qualification.

Use Scenario: Overcurrent protection in programmable logic controller (PLC) output modules powering solenoids and actuators.

IC Role / Device Role / Timing Role: Line-powered current sensor interfacing to isolation amplifiers or fast comparators for sub-millisecond trip response.

Use Value: Eliminates ground-loop errors and supports 0.5V sense range for <1% shunt power loss at 10A loads.

Battery Management System (BMS)

USB-C PD Adapter Current Control

Use Scenario: Charge/discharge current measurement in 12V LiFePO₄ backup systems for telecom infrastructure.

IC Role / Device Role / Timing Role: Low-quiescent-current (3µA) monitor feeding ADC input of battery gauge IC for coulomb counting.

Use Value: Extends standby runtime by >100 hours per µA reduction in sensing path current versus alternatives.

Use Scenario: Input current limiting in 65W USB-C power adapters with variable output voltages (5–20V).

IC Role / Device Role / Timing Role: High-side monitor feeding PWM controller feedback loop to regulate input current during constant-power mode.

Use Value: Maintains ±3.4% total error at 100mV sense voltage, meeting USB-IF compliance for ±5% current reporting tolerance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX4080TASA+	Higher quiescent current (75 µA), wider bandwidth (2.5 MHz), fixed 20V/V gain; requires dual supply	Requires separate V_CC; better for high-speed motor control but unsuitable for ultra-low-power battery systems	Select when bandwidth >1 MHz and supply rail stability permit extra 72 µA overhead
INA219AIDR	I²C digital output, integrated 12-bit ADC, 0.1% gain error, but 1 mA quiescent current and limited to 26V common-mode	Replaces analog signal chain with digital interface; lacks true high-side capability above 26V	Choose for microcontroller-based systems needing direct I²C readout and where 26V max rail suffices

Compared with MAX4080TASA+ and INA219AIDR, the ZXCT1107SA-7 uniquely combines line-powered operation, 3 µA IQ, 36V common-mode, and SOT23-3 size-making it optimal for space-constrained, always-on automotive and industrial monitors where supply simplicity and ultra-low standby loss are mandatory.

Availability

ZXCT1107SA-7 is available at Aetrix Electronics and suitable for automotive load monitoring, industrial 24V power rail sensing, and battery management systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ZXCT1107SA-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, AEC-Q100-qualified components for automotive, industrial, and computing markets.

The ZXCT series is part of Diodes' precision analog portfolio, designed specifically for high-side current sensing in harsh environments where ground disruption is unacceptable and supply simplicity is critical.

FAQ

What is the minimum supply voltage required for ZXCT1107SA-7 operation?

The minimum valid supply voltage is 2.5V plus the output voltage (V_OUT), because pin 1 (OUT) serves as both output and substrate connection. For example, with a 2.5kΩ gain resistor and 100mV sense voltage, I_OUT ≈ 408 µA → V_OUT ≈ 1.02V, so minimum VS+ = 3.52V. This constraint is defined in the Recommended Operating Conditions table and verified in the Applications section.

Can ZXCT1107SA-7 be used for bidirectional current sensing?

No - the ZXCT1107SA-7 is a unidirectional high-side monitor optimized for positive current flow only. Its internal architecture does not support reverse-polarity sensing or negative V_SENSE. For bidirectional applications, Diodes offers the ZXCT108x family, which includes dedicated zero-drift amplifiers with dual-supply capability and symmetric input ranges.

How does the 3 µA quiescent current impact measurement accuracy at low load currents?

At 100mV sense voltage, output current is ~408 µA - making the 3 µA quiescent current contribute <0.74% of full-scale output. Since IQ flows through internal nodes rather than the output path, it introduces negligible offset in the transconductance transfer function; dominant low-current errors arise from S− input bias current (≤100 nA) and resistor tolerances, not IQ.

Is external protection required against load short-circuit conditions?

Yes - although rated for 0.8V differential input, the device must be protected against >±8.5mA input current during shorts. A series resistor (R_PROT) between S+ and the shunt limits peak current. For a 36V rail, R_PROT ≥ (36V − 0.8V)/8.5mA ≈ 4.1 kΩ ensures safe operation without degrading normal sensing accuracy below 100mV.

ZXCT1107SA-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Current Monitor

Sensing Method:: High-Side

Accuracy:: -

Voltage - Input:: 2.5V ~ 36V

Current - Output:: -

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

ZXCT1107SA-7 FAQ

1.How can I place an order for ZXCT1107SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXCT1107SA-7 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 ZXCT1107SA-7 reliable?

The price and inventory of ZXCT1107SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT1107SA-7 is usually 5 days.

3.What payment methods are accepted for ZXCT1107SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT1107SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXCT1107SA-7?

ZXCT1107SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXCT1107SA-7 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 ZXCT1107SA-7?

For technical support, including ZXCT1107SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT1107SA-7 requirements.

6.How does Aetrix verify that ZXCT1107SA-7 is sourced from the original manufacturer or authorized distributors?

All ZXCT1107SA-7 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 ZXCT1107SA-7 meets industry standards.

7.What is the process for return or replacement of ZXCT1107SA-7?

All ZXCT1107SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT1107SA-7, 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 ZXCT1107SA-7 part is unused and in its original packaging.

Return procedure for ZXCT1107SA-7:

1.Submit a request within 90 days.

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

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