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Diodes Incorporated ZXCT180QA2W5-7
- Part No.:
- ZXCT180QA2W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ZXCT180QA2W5-7.pdf
- Description:
- CM VOLTAGE OUTPUT SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
ZXCT180QA2W5-7 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive current shunt monitor supporting uni-directional high-side and low-side sensing with 50V/V fixed gain, 400kHz small-signal bandwidth (at G=20), 370μA max quiescent current, and –0.3V to 26V common-mode input range independent of its 2.7V–5.5V supply. It delivers rail-to-rail output swing and ±1% max gain error over –40°C to +125°C for motor control fault detection.
For engineers reviewing the ZXCT180QA2W5-7 datasheet, ZXCT180QA2W5-7 pinout, ZXCT180QA2W5-7 application, or ZXCT180QA2W5-7 equivalent, key selection criteria include common-mode voltage tolerance beyond supply rails, gain accuracy across temperature, slew rate (2V/µs), low offset drift (1µV/°C), and SOT25 package compatibility with automotive PCB layout constraints.
Technical Context
The ZXCT180QA2W5-7 implements a precision current-sense amplifier topology with input stage capable of operating at common-mode voltages up to 26V while powered by only 2.7V–5.5V - enabling direct integration into 12V/24V automotive systems without level-shifting. Its internal resistor network fixes gain at 50V/V for Pinout A2 configuration.
It features rail-to-rail output drive into 10kΩ loads, 84–110dB CMRR over temperature, and 40nV/√Hz input-referred voltage noise. The device maintains stable operation with ≤1nF capacitive load and requires only a 0.1µF bypass capacitor on VS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fixed Gain | 50V/V - Output voltage = 50 × shunt voltage drop; enables precise scaling for 10mV–200mV sense ranges. |
| Common-Mode Range | –0.3V to 26V - Measures current in high-side configurations where shunt sits above battery rail, e.g., 24V e-pump supply. |
| Supply Voltage | 2.7V to 5.5V - Compatible with standard 3.3V or 5V microcontroller domains; no external regulator needed. |
| Quiescent Current | 370μA max - Enables always-on current monitoring in battery-sensitive modules without excessive drain. |
| Gain Error | ±1% over –40°C to +125°C - Ensures consistent calibration across full automotive temperature range without software compensation. |
| Offset Voltage Drift | 1µV/°C - Limits thermal-induced measurement error to <125µV over full temperature span, critical for low-current sensing. |
| Slew Rate | 2V/µs - Supports fast transient detection in motor stall or short-circuit events with sub-microsecond response. |
Pinout & Package
Package: 5-pin SOT25 (3.0mm × 1.6mm × 1.1mm), RoHS-compliant, halogen-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for internal circuitry and output stage; must connect to low-impedance star ground near shunt. |
| VS | Power supply | 2.7V–5.5V supply input; requires 0.1µF ceramic bypass capacitor placed adjacent to pin. |
| IN+ | Analog input (+) | Connects to supply side of shunt; accepts common-mode up to 26V regardless of VS voltage. |
| IN– | Analog input (–) | Connects to load side of shunt; differential input defines sensed current direction and magnitude. |
| OUT | Analog output | Voltage proportional to ILOAD × RSHUNT × 50; rail-to-rail swing supports full ADC utilization. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in safety-critical automotive subsystems including body control and e-pumps. |
| 400kHz bandwidth (G=20) / 300kHz (G=50) | Enables real-time current waveform capture for PWM-driven motors and fast fault identification before thermal damage occurs. |
| ±400µV max input offset voltage | Supports accurate measurement of sub-100mA currents using 10mΩ shunts without zero-point calibration. |
| ESD protection | 5kV HBM rating ensures robustness against assembly handling and in-vehicle ESD events per ISO 10605. |
| Lead-free & green construction | Fully compliant with RoHS 3 (2015/863/EU), <900ppm Br+Cl, <1000ppm Sb - meets Tier 1 automotive material declarations. |
Applications
| Vehicle Motor Control | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Monitoring current in 12V DC brushless fans or seat adjustment motors during active motion and stall conditions. IC Role / Device Role / Timing Role: High-side current sensor feeding analog input of MCU for closed-loop speed/torque control and overcurrent shutdown. Use Value: 26V common-mode tolerance allows direct placement between battery and H-bridge, eliminating isolation components and reducing BOM cost. |
Use Scenario: Detecting abnormal draw in door lock actuators, mirror heaters, or interior lighting circuits. IC Role / Device Role / Timing Role: Low-side shunt monitor providing real-time load status to BCM microcontroller for diagnostics and power management. Use Value: 370μA quiescent current enables continuous monitoring in sleep mode without compromising battery longevity. |
| Electric Power Steering (EPS) | On-Board Charger (OBC) Precharge |
|
Use Scenario: Sensing phase current in EPS motor driver during assist torque delivery and fault recovery. IC Role / Device Role / Timing Role: Uni-directional current monitor with 2V/µs slew rate capturing rapid transients during torque step changes. Use Value: 300kHz bandwidth at G=50 ensures fidelity of current waveforms sampled at ≥1MS/s for field-oriented control algorithms. |
Use Scenario: Verifying precharge completion by measuring inrush current into DC-link capacitors before main contactor closure. IC Role / Device Role / Timing Role: High-side current monitor placed between precharge resistor and DC-link, reporting scaled voltage to safety controller. Use Value: –0.3V to 26V common-mode range accommodates negative voltage spikes during relay bounce, preventing false trip signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | Bi-directional sensing, 20V/V gain, 4V/V to 500V/V programmable via external resistors; higher 2.75V/V min VOS. | Supports regenerative braking current reversal; requires external gain-setting resistors and layout area. | Select when bi-directional capability and flexible gain are required despite larger footprint and higher cost. |
| TSC2010AIDT | Uni-directional, 20V/V fixed gain, 1.5MHz bandwidth, but limited to 12V common-mode and non-AEC-Q100. | Suitable for industrial motor drives but not qualified for automotive under-hood deployment. | Choose for cost-sensitive non-automotive applications needing higher bandwidth and lower offset (±150µV). |
Compared with INA240A1QDRQ1 and TSC2010AIDT, the ZXCT180QA2W5-7 offers AEC-Q100 qualification, 26V common-mode headroom, and SOT25 compactness - making it optimal for space-constrained, high-voltage automotive current monitoring where uni-directional sensing suffices.
Availability
ZXCT180QA2W5-7 is available at Aetrix Electronics and suitable for vehicle motor controls, body control modules, and electric power steering systems requiring stable component supply with automotive-grade traceability and PPAP support.
Supply support for ZXCT180QA2W5-7 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 solutions for automotive, industrial, and computing markets.
The ZXCT180Q series targets automotive current sensing with emphasis on AEC-Q100 compliance, wide common-mode operation, and low-power precision - designed specifically for valve, motor, and lighting control in harsh-temperature environments.
FAQ
What is the difference between ZXCT180QA2W5-7 and ZXCT180QB2W5-7?
ZXCT180QA2W5-7 uses Pinout A2 (OUT on Pin 1), while ZXCT180QB2W5-7 uses Pinout B2 (OUT on Pin 4). Both provide identical 50V/V gain, electrical specs, and AEC-Q100 qualification. The pinout variation allows PCB layout optimization - Pinout A places OUT adjacent to IN+, simplifying routing for certain shunt placements; Pinout B isolates OUT from inputs for noise-sensitive designs.
Can ZXCT180QA2W5-7 be used for high-side sensing with a 24V battery supply?
Yes. Its –0.3V to 26V common-mode input range operates independently of the 2.7V–5.5V VS supply, enabling direct connection across a shunt placed between 24V battery and load. No level-shifting circuitry is required, and the device remains functional even if VS is unpowered while IN+ and IN– are at 24V.
Does ZXCT180QA2W5-7 require external gain-setting resistors?
No. It integrates factory-trimmed thin-film resistors to deliver a precise 50V/V fixed gain. Unlike programmable current-sense amplifiers, ZXCT180QA2W5-7 eliminates external resistor selection, layout area, matching tolerances, and thermal drift concerns - reducing design complexity and improving long-term accuracy.
How does the 370μA max quiescent current impact battery-powered automotive modules?
At 370μA max, ZXCT180QA2W5-7 draws less than 9mAh per day - well within typical automotive module sleep-mode budgets. This enables continuous current monitoring during ignition-off states for intrusion detection, battery leak diagnostics, or pre-ignition system readiness checks without measurable impact on 12V lead-acid or LiFePO₄ auxiliary batteries.
ZXCT180QA2W5-7 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/Low-Side
- Accuracy:
- ±0.1%
- Voltage - Input:
- 2.7V ~ 5.5V
- Current - Output:
- 8mA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
ZXCT180QA2W5-7 FAQ
1.How can I place an order for ZXCT180QA2W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT180QA2W5-7 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 ZXCT180QA2W5-7 reliable?
The price and inventory of ZXCT180QA2W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT180QA2W5-7 is usually 5 days.
3.What payment methods are accepted for ZXCT180QA2W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT180QA2W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT180QA2W5-7?
ZXCT180QA2W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT180QA2W5-7 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 ZXCT180QA2W5-7?
For technical support, including ZXCT180QA2W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT180QA2W5-7 requirements.
6.How does Aetrix verify that ZXCT180QA2W5-7 is sourced from the original manufacturer or authorized distributors?
All ZXCT180QA2W5-7 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 ZXCT180QA2W5-7 meets industry standards.
7.What is the process for return or replacement of ZXCT180QA2W5-7?
All ZXCT180QA2W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT180QA2W5-7, 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 ZXCT180QA2W5-7 part is unused and in its original packaging.
Return procedure for ZXCT180QA2W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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