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Diodes Incorporated ZXCT1080QE5TA
- Part No.:
- ZXCT1080QE5TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ZXCT1080QE5TA.pdf
- Description:
- IC CURRENT MONITOR 3% SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,413
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Product details
Overview
ZXCT1080QE5TA from Diodes Incorporated is an automotive-grade high-side current monitor IC with fixed 10× gain, 3V–60V common-mode input range, ±3% total output error, and AEC-Q100 Grade 1 qualification. It enables non-intrusive load current sensing in 12V/24V/48V automotive power distribution systems without ground-plane disruption, supporting battery management and overcurrent protection in engine control units and body electronics.
For engineers reviewing the ZXCT1080QE5TA datasheet, ZXCT1080QE5TA pinout, ZXCT1080QE5TA application, or ZXCT1080QE5TA equivalent, key selection criteria include its 60V continuous high-side voltage rating, 80μA VCC quiescent current, -40°C to +125°C operating range, and SOT25 package compatibility with space-constrained automotive PCB layouts.
Technical Context
The ZXCT1080QE5TA implements a unidirectional, single-supply high-side current sensing architecture using an internal voltage-to-current converter and MOSFET-based transconductance stage, followed by a unity-gain buffered output. Its fixed 10× gain is achieved via precision resistor ratio (RG/RGT), eliminating external gain-setting components.
It features independent VCC and sense-input rails, enabling operation during load short-circuit events where S+ collapses while VCC remains active. Common-mode rejection exceeds 68dB at 60V input, and small-signal bandwidth reaches 500kHz, supporting fast transient detection in motor drive and solenoid control feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Common-Mode Input Range | 3V to 60V - supports direct sensing on 48V battery rails and withstands 60V load dump transients without clamping or shutdown. |
| Fixed Gain | 10 V/V - outputs 1.0V for 100mV sense voltage; eliminates calibration drift and simplifies ADC interface in 3.3V/5V microcontroller systems. |
| Total Output Error | ±3% - includes gain error, offset, and temperature drift; ensures ±30mA accuracy for 1A full-scale current measurement with 10mΩ shunt. |
| VCC Supply Range | 4.5V to 12V - allows direct connection to vehicle's regulated 5V or 12V rail, independent of sensed high-voltage domain. |
| Quiescent Current (VCC) | 80μA - enables always-on monitoring in low-power ECU sleep modes without compromising battery longevity. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood placement in engine control modules and transmission control units. |
| Output Voltage Range | 0V to 1.5V - compatible with standard SAR ADC reference voltages and avoids rail-to-rail output stage complexity. |
Pinout & Package
Supplied in RoHS-compliant, lead-free SOT25 (SC-74A) package with 1.6mm × 2.8mm footprint and 0.95mm height, optimized for automated assembly and thermal performance in high-density automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Analog supply input | Power source for internal amplifier and buffer; decoupling capacitor required; enables continued operation during S+ short-to-ground faults. |
| 2 - GND | Analog ground reference | Return path for internal bias currents; must be connected to clean system ground near VCC decoupling cap to minimize noise coupling. |
| 3 - OUT | Voltage output | Buffered 10× scaled VSENSE; drives 1kΩ loads directly; sinks up to 20μA and sources up to 1mA for interfacing with ADC inputs or comparator thresholds. |
| 4 - S+ | High-side sense positive input | Connects to load side of shunt resistor; withstands 60V continuous and 65V transient; input current <27μA minimizes shunt error. |
| 5 - S- | High-side sense negative input | Connects to power-rail side of shunt; differential input with 800mV absolute max rating; requires Kelvin layout for <1% measurement error. |
Key Features
| Feature | Design Value |
|---|---|
| 60V High-Side Common-Mode Range | Enables direct integration into 48V mild-hybrid architectures without level-shifting circuitry or isolated amplifiers. |
| AEC-Q100 Grade 1 Qualification | Validated for automotive use with PPAP support, IATF16949 manufacturing, and guaranteed reliability across -40°C to +125°C ambient. |
| 10× Fixed Gain Architecture | Removes gain-setting resistors and associated tolerance stack-up, reducing BOM count and improving long-term stability vs. discrete solutions. |
| Low 80μA VCC Quiescent Current | Supports permanent connection to battery rail in always-monitoring applications such as smart junction boxes and battery disconnect units. |
| 500kHz Small-Signal Bandwidth | Accurately captures fast current transients in BLDC motor commutation and solenoid actuation waveforms without phase lag. |
Applications
| Engine Control Unit (ECU) Power Monitoring | 48V Mild-Hybrid Battery Management |
|---|---|
|
Use Scenario: Real-time monitoring of fuel injector, ignition coil, and throttle actuator supply currents in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: High-side current sensor providing analog feedback to MCU ADC for closed-loop current limiting and fault detection. Use Value: Enables cycle-by-cycle overcurrent shutdown within 2μs response time, preventing MOSFET failure during short-circuit events. |
Use Scenario: Bidirectional current measurement in 48V battery disconnect switches and DC-DC converter input stages. IC Role / Device Role / Timing Role: Unidirectional high-side monitor on battery-positive rail, paired with complementary device for charge/discharge separation. Use Value: Delivers ±3% full-scale accuracy across -40°C to +125°C, ensuring SOC estimation integrity under extreme under-hood conditions. |
| Automotive Lighting Load Protection | Smart Junction Box Current Sensing |
|
Use Scenario: Overcurrent detection for LED headlamp drivers and adaptive front-lighting systems (AFS). IC Role / Device Role / Timing Role: High-side current monitor feeding diagnostic logic in lighting control modules to distinguish between open-circuit and short-circuit faults. Use Value: 60V rating accommodates 48V system transients; 10mV minimum linear VSENSE enables detection of 100mA faults with 100mΩ shunt. |
Use Scenario: Distributed current monitoring across multiple fused outputs in centralized power distribution units (PDUs). IC Role / Device Role / Timing Role: Compact SOT25 current sensor placed adjacent to each fuse output to enable individual channel diagnostics and load profiling. Use Value: Low 0.95mm profile allows placement beneath fuse holders; 80μA quiescent current permits always-on monitoring of all 12+ channels simultaneously. |
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 |
|---|---|---|---|
| ZXCT1082QE5TA | Higher 40V common-mode range, ±2.5% total error, 50μA VCC current | Targeted for 24V commercial vehicles; lower power but reduced voltage margin vs. 60V requirement | Select when 40V rating suffices and ultra-low quiescent current is prioritized over 60V robustness. |
| INA240A1QDRQ1 | Bi-directional sensing, 80V common-mode, ±0.6% error, 2.4mA quiescent current | Supports regenerative braking current reversal; higher accuracy but 30× higher supply current | Choose for bidirectional 48V battery monitoring where precision outweighs power budget constraints. |
Compared with ZXCT1082QE5TA, the ZXCT1080QE5TA provides 20V higher continuous common-mode tolerance critical for 48V load-dump immunity; versus INA240A1QDRQ1, it trades bidirectionality and ultra-low error for 30× lower quiescent current and simpler unidirectional signal chain design.
Availability
ZXCT1080QE5TA is available at Aetrix Electronics and suitable for automotive power distribution, battery management, and engine control applications requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for ZXCT1080QE5TA 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 semiconductor company specializing in discrete, analog, and mixed-signal devices for automotive, industrial, and computing markets, with IATF16949-certified manufacturing facilities.
The ZXCT1080Q series belongs to Diodes' automotive-qualified current sensing portfolio, designed specifically for high-reliability, high-voltage monitoring in engine control, battery disconnect, and smart power distribution systems.
FAQ
Is ZXCT1080QE5TA pin-compatible with ZXCT1081QE5TA?
No. While both share the same SOT25 package and pinout, the ZXCT1080QE5TA supports 60V continuous common-mode voltage on S+/S−, whereas the ZXCT1081QE5TA is rated for 40V. Interchanging them risks overvoltage damage in 48V systems. The part numbers reflect distinct internal voltage-handling structures, not just marking variants.
What is the minimum usable sense voltage for accurate measurement?
The ZXCT1080QE5TA maintains linearity from 10mV to 150mV VSENSE, with specified offset error (VO(10)) referenced at 10mV. Below 10mV, output remains monotonic but gain and offset errors increase; for ±1% full-scale accuracy, use ≥50mV VSENSE with appropriate shunt resistor selection.
Can ZXCT1080QE5TA be used in bidirectional current sensing applications?
No. The ZXCT1080QE5TA is unidirectional only: it measures current flowing from S+ to S− and cannot resolve reverse polarity. Its internal architecture lacks negative output swing capability, and the output saturates near 0V for reverse differential voltage. For bidirectional sensing, consider the INA240-Q1 or similar devices.
Does ZXCT1080QE5TA require external compensation components?
No external compensation is needed for stable operation. The device integrates internal frequency compensation optimized for 500kHz bandwidth with capacitive loads ≤100pF. For driving longer traces or higher capacitance, add a 10Ω series resistor at the OUT pin to prevent oscillation-verified in Diodes' application note AN-4001.
ZXCT1080QE5TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Function:
- Current Monitor
- Sensing Method:
- High-Side
- Accuracy:
- ±3%
- Voltage - Input:
- 3V ~ 60V
- Current - Output:
- 1mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
ZXCT1080QE5TA FAQ
1.How can I place an order for ZXCT1080QE5TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT1080QE5TA 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 ZXCT1080QE5TA reliable?
The price and inventory of ZXCT1080QE5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT1080QE5TA is usually 5 days.
3.What payment methods are accepted for ZXCT1080QE5TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT1080QE5TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT1080QE5TA?
ZXCT1080QE5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT1080QE5TA 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 ZXCT1080QE5TA?
For technical support, including ZXCT1080QE5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT1080QE5TA requirements.
6.How does Aetrix verify that ZXCT1080QE5TA is sourced from the original manufacturer or authorized distributors?
All ZXCT1080QE5TA 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 ZXCT1080QE5TA meets industry standards.
7.What is the process for return or replacement of ZXCT1080QE5TA?
All ZXCT1080QE5TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT1080QE5TA, 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 ZXCT1080QE5TA part is unused and in its original packaging.
Return procedure for ZXCT1080QE5TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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