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

Diodes Incorporated ZXCT1012DAATA

Name: ZXCT1012DAATA
Brand: Diodes Incorporated
SKU: ZXCT1012DAATA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXCT1012DAATA

Manufacturer:: Diodes Incorporated

Category:: Current Regulation/Management

Package:: 5-WDFN Exposed Pad

Datasheet:: ZXCT1012DAATA.pdf

Description:: IC CURRENT MONITOR 2.5% 5TDFN

Quantity:: RFQ Add To RFQ list

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Inventory:4,191

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Product details

Overview

ZXCT1012DAATA from Diodes Incorporated is a high-side current sense monitor IC that converts differential voltage across a shunt resistor into a proportional output current. It operates from 2.5V to 20V supply, draws only 3.5μA quiescent current, delivers 10mA/V transconductance, and is housed in a TSOT25 package - enabling precision battery current monitoring in space-constrained portable systems.

For engineers reviewing the ZXCT1012DAATA datasheet, ZXCT1012DAATA pinout, ZXCT1012DAATA application, or ZXCT1012DAATA equivalent, key selection criteria include its micro-power operation, ground-referenced voltage output via external ROUT, ±2.5% accuracy at 200mV sense voltage, and suitability for battery fuel gauging and overcurrent protection where low V_SENSE linearity down to 10mV matters.

Technical Context

The ZXCT1012DAATA functions as a voltage-to-current transducer with fixed 10mA/V transconductance (G_m), referenced to SENSE+ as its supply rail. Its input stage accepts common-mode voltages from 2.5V to 20V while measuring differential sense voltages (V_SENSE) from 10mV to 2.5V, with output current sinking from OUT to GND through an external resistor.

It features monotonic output behavior, no negative swing capability, and inherent immunity to ground plane disruption due to high-side sensing architecture. CMRR is specified at 80dB, though power supply rejection dominates common-mode rejection since SENSE+ powers the internal circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Range	2.5V to 20V - supports direct battery operation from single-cell Li-ion to multi-cell systems
Quiescent Current	3.5μA typical - enables multi-year battery life in always-on monitoring applications
Transconductance	10mA/V - defines linear I_OUT = 10 × V_SENSE relationship for predictable gain scaling
Accuracy	±2.5% at V_SENSE = 200mV - ensures reliable current measurement within defined operating range
Bandwidth	300kHz at V_SENSE = 10mV - sufficient for DC and slow-varying load current tracking
Operating Temp	−40°C to +85°C - qualified for industrial and consumer portable equipment environments
Output Swing	0V to (V_SENSE− − 1.5V) - constrains maximum ROUT value to avoid saturation in high-common-mode setups

Pinout & Package

TSOT25 (5-pin thin shrink small-outline transistor) package with 0.95mm × 1.00mm footprint and 0.55mm max height - optimized for ultra-thin portable designs.

Pin/Terminal	Circuit Role	Design Meaning
1 - N/C	No connection	Internally unconnected; must remain floating or grounded per layout best practice
2 - GND	Ground reference	Return path for output current and internal bias; requires low-impedance PCB connection
3 - OUT	Current output sink	Sinks proportional current (I_OUT = 10mA/V × V_SENSE); ROUT to GND sets V_OUT
4 - SENSE+	High-side sense & supply	Connects to positive rail being monitored; supplies internal circuitry; CM range = 2.5–20V
5 - SENSE−	High-side sense reference	Connects to shunt resistor's low side; defines V_SENSE = V_SENSE+ − V_SENSE−

Key Features

Feature	Design Value
Micro-power operation	3.5μA IQ enables >10-year battery life in coin-cell-powered fuel gauges
User-defined gain	External ROUT selects full-scale output voltage without changing IC or layout
High-side sensing	Eliminates ground path interruption - preserves system grounding integrity and noise immunity
Low minimum sense voltage	10mV V_SENSE threshold supports accurate low-current detection in standby modes
Monotonic output	Guarantees non-reversing response - essential for stable closed-loop current control

Applications

Battery Fuel Gauge

Battery Charger Monitoring

Use Scenario: Real-time estimation of remaining charge in lithium-ion packs used in wearables and Bluetooth headsets.

IC Role / Device Role / Timing Role: High-side current monitor converting shunt voltage to ground-referenced analog voltage for ADC sampling.

Use Value: Enables <1% state-of-charge error over discharge cycle using 100mΩ shunt and 10-bit ADC with 3.3V reference.

Use Scenario: Monitoring charge current during CC/CV phases in USB-PD compliant wall adapters and portable power banks.

IC Role / Device Role / Timing Role: Precision current feedback element in charge controller loop with fast transient response up to 300kHz.

Use Value: Maintains ±3% current regulation accuracy across 0.5A–3A range while consuming <4μA quiescent power.

Overcurrent Protection

Power Management Unit (PMU)

Use Scenario: Detecting short-circuit events in USB Type-C downstream ports before thermal damage occurs.

IC Role / Device Role / Timing Role: Fast-response current limiter trigger feeding comparator input or microcontroller interrupt pin.

Use Value: Triggers fault signal within 500ns of >2.5A surge on 50mΩ shunt, compatible with 3.3V logic thresholds.

Use Scenario: Per-rail current telemetry in multi-output PMUs for IoT edge nodes and smart sensors.

IC Role / Device Role / Timing Role: Analog current reporting block for system-level power budgeting and dynamic voltage scaling decisions.

Use Value: Delivers calibrated 0–100mV output per 1A load with <2.5% total error, simplifying calibration in firmware.

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 (75μA), wider V_CM (76V), fixed-gain voltage output	Better suited for industrial 24V/48V bus monitoring; not optimized for sub-10μA battery operation	Select when high common-mode voltage tolerance and voltage-output simplicity outweigh ultra-low IQ needs
INA219AIDR	I²C digital output, integrated ADC, 26V max V_CM, 1mA IQ	Provides direct digital current/power reporting; requires MCU interface and firmware support	Select when system already uses I²C and benefits from on-chip calibration, power calculation, and alert registers

Compared with MAX4080TASA+ and INA219AIDR, the ZXCT1012DAATA uniquely balances ultra-low power (3.5μA), analog simplicity (no communication overhead), and compact TSOT25 packaging - making it optimal for cost-sensitive, size-constrained, always-on battery current sensing where analog voltage output suffices.

Availability

ZXCT1012DAATA is available at Aetrix Electronics and suitable for battery fuel gauge systems, portable charger designs, and overcurrent protection circuits requiring stable component supply and long-term manufacturability.

Supply support for ZXCT1012DAATA 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-performance, energy-efficient components for consumer, computing, industrial, and communications markets.

The ZXCT series targets precision analog current sensing in portable and battery-powered applications, emphasizing micro-power operation, high-side topology, and minimal PCB footprint - directly addressing design constraints in wearables, medical devices, and IoT endpoints.

FAQ

What is the minimum sense voltage for accurate operation of ZXCT1012DAATA?

The ZXCT1012DAATA is characterized for linearity down to 10mV V_SENSE, and Diodes recommends maintaining ≥10mV to minimize offset-induced errors. At 10mV, output current is ~100μA (typical), and accuracy degrades below this due to input offset voltage dominance. For best accuracy, operate between 40mV and 200mV V_SENSE.

Can ZXCT1012DAATA be used in low-voltage 1.8V systems?

No - ZXCT1012DAATA requires minimum 2.5V on SENSE+ to power its internal circuitry and maintain specified performance. It cannot operate from 1.8V rails. For sub-2.5V applications, consider alternative current monitors with rail-to-rail input or dedicated low-voltage architectures.

How does the TSOT25 package affect thermal performance?

The TSOT25 package has θ_JA = 250°C/W on a standard FR4 board. With max junction temperature of 150°C and ambient of 85°C, allowable power dissipation is limited to 260mW. At high V_IN and large V_SENSE, power loss (I_OUT × (V_IN − V_OUT)) must stay below this limit - e.g., 20V input with 2.5V output and 25mA I_OUT exceeds rating.

Is there a recommended layout practice for minimizing noise in ZXCT1012DAATA measurements?

Yes - place R_SENSE as close as possible to SENSE+ and SENSE− pins with Kelvin connections, use separate analog ground pour under the device, avoid routing noisy digital traces near SENSE pins, and route ROUT directly to clean GND with minimal trace length. A 10nF ceramic capacitor from SENSE− to GND improves high-frequency noise rejection.

ZXCT1012DAATA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 5-WDFN Exposed Pad

Packaging:: Cut Tape (CT)

Product Status:: Obsolete

Function:: Current Monitor

Sensing Method:: High-Side

Accuracy:: ±2.5%

Voltage - Input:: 2.5V ~ 20V

Current - Output:: 2mA

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 5-TDFN (3x3)

ZXCT1012DAATA FAQ

1.How can I place an order for ZXCT1012DAATA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXCT1012DAATA 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 ZXCT1012DAATA reliable?

The price and inventory of ZXCT1012DAATA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT1012DAATA is usually 5 days.

3.What payment methods are accepted for ZXCT1012DAATA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT1012DAATA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXCT1012DAATA?

ZXCT1012DAATA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXCT1012DAATA 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 ZXCT1012DAATA?

For technical support, including ZXCT1012DAATA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT1012DAATA requirements.

6.How does Aetrix verify that ZXCT1012DAATA is sourced from the original manufacturer or authorized distributors?

All ZXCT1012DAATA 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 ZXCT1012DAATA meets industry standards.

7.What is the process for return or replacement of ZXCT1012DAATA?

All ZXCT1012DAATA units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT1012DAATA, 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 ZXCT1012DAATA part is unused and in its original packaging.

Return procedure for ZXCT1012DAATA:

1.Submit a request within 90 days.

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

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