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Diodes Incorporated ZXCT1008FTA
- Part No.:
- ZXCT1008FTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXCT1008FTA.pdf
- Description:
- IC CURRENT MONITOR 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:12,685
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Product details
Overview
ZXCT1008FTA from Diodes Incorporated is a high-side current sense monitor IC that converts differential shunt voltage (VSENSE) into a proportional output current (IOUT), enabling ground-referenced voltage measurement without disrupting the system ground plane. It operates from 2.5V to 20V supply, supports up to 500mV sense voltage, delivers 1% typical accuracy, and draws only 4μA quiescent current - ideal for automotive overcurrent monitoring and DC motor control.
For engineers reviewing the ZXCT1008FTA datasheet, ZXCT1008FTA pinout, ZXCT1008FTA application, or ZXCT1008FTA equivalent, key selection criteria include its transconductance (10,000 µA/V), wide ambient temperature range (–40°C to +125°C), SOT23 package compatibility, reverse-polarity tolerance, and transient-hardened operation in 12V/24V automotive systems.
Technical Context
The ZXCT1008FTA implements a precision transconductance amplifier architecture that linearly converts VSENSE = VSENSE+ − VSENSE− into IOUT with fixed 10 mA/V gain. Its input stage withstands common-mode voltages up to 20V while rejecting ground noise via high-side sensing topology.
It features internal protection against reverse battery connection and load-dump transients, and its output current remains stable across –40°C to +125°C ambient, with bandwidth extending to 2 MHz at 100mV input signal - enabling real-time current feedback in solenoid drivers and power rail monitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.5V to 20V - supports direct connection to 12V/24V automotive rails without external regulators |
| Sense Voltage Range | 0 to 500mV - accommodates standard shunt resistors (e.g., 0.1Ω at 5A yields 500mV full-scale) |
| Transconductance | 10,000 µA/V - enables precise scaling: 100mV sense → 1.0mA IOUT → 100mV VOUT with 100Ω load |
| Accuracy | ±2.5% max (–40°C to +85°C) - ensures reliable overcurrent trip thresholds in safety-critical loads |
| Quiescent Current | 4µA - minimizes standby power loss in always-on vehicle subsystems |
| Bandwidth | 2MHz @ 100mV input - captures fast current transients during motor commutation or short-circuit events |
Pinout & Package
SOT23-3 package (3.0 × 1.7 mm footprint, 1.3 mm height), thermally optimized for PCB trace shunt integration and high-temperature automotive mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSENSE+ | High-side shunt terminal | Connects to supply rail side of current shunt; tolerates up to 20V common-mode voltage |
| VSENSE− | Load-side shunt terminal | Connects to load side of shunt; differential input defines measured current direction and magnitude |
| IOUT | Current output terminal | Sinks proportional current (IOUT = 10×VSENSE); requires external resistor to ground for voltage conversion |
Key Features
| Feature | Design Value |
|---|---|
| High-side sensing topology | Eliminates ground path interruption - preserves system grounding integrity and avoids noise coupling into sensitive analog/digital circuits |
| Reverse polarity protection | Withstands –18V on VSENSE+ or VSENSE− - prevents damage during battery installation errors in automotive service |
| Transient-hardened design | Survives ISO 7637-2 Pulse 5a (load dump up to 60V/100ms) when used with RLIM/Z1 clamp network |
| PCB trace shunt compatibility | Compensated PTC/NCT response allows use of copper traces as low-cost shunts - reduces BOM count and improves thermal coupling |
Applications
| Automotive Battery Monitoring | DC Motor Overcurrent 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 sensor providing isolated, ground-referenced output for MCU ADC sampling. Use Value: Enables accurate state-of-charge estimation and fault detection without compromising chassis ground integrity. | Use Scenario: Detecting stall or locked-rotor conditions in automotive window lift motors. IC Role / Device Role / Timing Role: Fast-response current monitor feeding comparator or microcontroller interrupt input. Use Value: Triggers shutdown within 500ns of overcurrent event (via 2MHz bandwidth), preventing MOSFET failure. |
| Solenoid Driver Feedback | Industrial Power Rail Monitor |
Use Scenario: Verifying actuation current in fuel injector or transmission solenoid drivers. IC Role / Device Role / Timing Role: Analog current feedback element in closed-loop PWM control loop. Use Value: 1% accuracy ensures consistent solenoid force across temperature, improving emission compliance. | Use Scenario: Monitoring 24V DC power distribution in factory automation PLC backplanes. IC Role / Device Role / Timing Role: High-voltage-tolerant current sensor interfacing to isolated ADC via optocoupler or digital isolator. Use Value: 20V absolute max rating allows direct connection to unregulated 24V rails, reducing external protection components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4080TASA+ | Higher accuracy (±0.5%), wider supply (4.5V–76V), but 60µA IQ and SO8 package | Better suited for precision industrial power supplies; less optimal for ultra-low-power automotive modules | Select when ±0.5% accuracy and >40V operation outweigh size and quiescent current penalties |
| INA219AIDR | I²C digital output, integrated ADC, 26V max, 1mA IQ, SO8 package | Requires MCU firmware support; eliminates external ADC but adds software complexity | Select when digital interface, bus diagnostics, or multi-channel monitoring justify higher cost and code overhead |
Compared with MAX4080TASA+ and INA219AIDR, the ZXCT1008FTA offers the smallest footprint (SOT23), lowest quiescent current (4µA), and simplest analog interface - making it optimal for space-constrained, always-on automotive subsystems where analog voltage feedback suffices.
Availability
ZXCT1008FTA is available at Aetrix Electronics and suitable for automotive battery monitoring, DC motor overcurrent protection, solenoid driver feedback, and industrial power rail monitoring requiring stable component supply across extended temperature and transient-prone environments.
Supply support for ZXCT1008FTA 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 ZXCT1008FTA belongs to Diodes' high-side current monitor product line, engineered specifically for robust, low-power, ground-independent current measurement in harsh automotive electrical environments.
FAQ
What is the maximum continuous sense voltage the ZXCT1008FTA can handle?
The ZXCT1008FTA supports a continuous differential sense voltage (VSENSE = VSENSE+ − VSENSE−) of 0 to 500 mV, with absolute maximum rating of –0.5V to +5V. Exceeding 500mV degrades accuracy due to input stage nonlinearity, though the device remains undamaged up to the absolute limit.
Can the ZXCT1008FTA be used with a 3.3V supply?
Yes - the ZXCT1008FTA operates down to 2.5V supply, making it fully compatible with 3.3V systems. At 3.3V, it maintains full 500mV sense range and 10,000 µA/V transconductance, provided the output load resistor (ROUT) is sized to keep VOUT ≤ 3.3V and avoid saturation.
Does the ZXCT1008FTA require an external reference or calibration?
No - the ZXCT1008FTA is a self-contained transconductance amplifier with factory-trimmed gain. It requires no external reference, calibration circuitry, or trimming resistors. Accuracy is specified at ±2.5% over temperature and supply, with no user adjustment needed.
How does the ZXCT1008FTA handle reverse battery connection?
The ZXCT1008FTA withstands –18V applied to either VSENSE+ or VSENSE− pin (with IOUT grounded), per Diodes' characterization. This protects against accidental reverse battery installation in automotive service, eliminating need for external series diodes or TVS clamps on sense inputs.
ZXCT1008FTA 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:
- ±1%
- Voltage - Input:
- 2.5V ~ 20V
- Current - Output:
- 25mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXCT1008FTA FAQ
1.How can I place an order for ZXCT1008FTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT1008FTA 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 ZXCT1008FTA reliable?
The price and inventory of ZXCT1008FTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT1008FTA is usually 5 days.
3.What payment methods are accepted for ZXCT1008FTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT1008FTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT1008FTA?
ZXCT1008FTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT1008FTA 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 ZXCT1008FTA?
For technical support, including ZXCT1008FTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT1008FTA requirements.
6.How does Aetrix verify that ZXCT1008FTA is sourced from the original manufacturer or authorized distributors?
All ZXCT1008FTA 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 ZXCT1008FTA meets industry standards.
7.What is the process for return or replacement of ZXCT1008FTA?
All ZXCT1008FTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT1008FTA, 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 ZXCT1008FTA part is unused and in its original packaging.
Return procedure for ZXCT1008FTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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