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Diodes Incorporated ZXCT180QA4W5-7
- Part No.:
- ZXCT180QA4W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ZXCT180QA4W5-7.pdf
- Description:
- CM VOLTAGE OUTPUT SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
ZXCT180QA4W5-7 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive current shunt monitor configured for unidirectional high-side/low-side sensing with 200V/V fixed gain, 400μV max input offset voltage over temperature, ±1% gain error, and operation across -0.3V to 26V common-mode range at 2.7V–5.5V supply. It delivers 2V/μs slew rate and 85kHz bandwidth (for G=200), enabling fast fault-current detection in e-pump motor control and battery charging systems.
For engineers reviewing the ZXCT180QA4W5-7 datasheet, ZXCT180QA4W5-7 pinout, ZXCT180QA4W5-7 application, or ZXCT180QA4W5-7 equivalent, key selection criteria include its SOT25 package compatibility, rail-to-rail output swing, 370μA max quiescent current, and support for high common-mode voltage sensing independent of supply rail - critical for 12V/24V automotive subsystems requiring precise current feedback under transient conditions.
Technical Context
The ZXCT180QA4W5-7 implements a precision current-sense amplifier topology that separates input stage biasing from supply rails, enabling accurate measurement of shunt voltage drops at common-mode potentials up to 26V while powered only by 2.7–5.5V. Its internal resistor network fixes gain at 200V/V, eliminating external gain-setting components.
It features dual pinout options (A/B) for PCB layout flexibility: Pinout A places OUT on Pin 1, supporting compact routing near low-side shunts; Pinout B places OUT on Pin 4, optimizing trace symmetry for high-side configurations. Both versions maintain identical electrical performance and thermal characteristics in the SOT25 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fixed Gain | 200V/V - Output voltage = 200 × shunt voltage drop; enables direct interface with 3.3V ADCs using ≤16.5mV shunt drop. |
| Common-Mode Range | -0.3V to 26V - Measures current in high-side configurations where shunt sits above battery rail, or low-side with negative transients. |
| Offset Voltage (max) | ±400μV - Limits worst-case current measurement error to ±0.4mV across shunt; critical for <100mA fault detection thresholds. |
| Bandwidth | 85kHz - Supports detection of rapid current surges (e.g., short-circuit events in <12μs) in motor drive and charging circuits. |
| Quiescent Current | 370μA max - Enables always-on monitoring in battery-powered modules without compromising standby life. |
| Supply Voltage | 2.7V to 5.5V - Compatible with standard automotive microcontroller I/O rails and LDO outputs. |
| Operating Temp | -40°C to +125°C - Validated for engine bay and powertrain locations per AEC-Q100 Grade 1. |
Pinout & Package
The ZXCT180QA4W5-7 is housed in a 5-pin SOT25 package (3.0mm × 2.8mm × 1.3mm), optimized for thermal dissipation (RθJA = 128°C/W) and high-density automotive PCB layouts. Pinout A (as indicated by 'A' in part number) places OUT on Pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Analog output | Voltage proportional to sensed current × 200; rail-to-rail swing supports full-scale use of 3.3V/5V ADC reference. |
| GND (Pin 2) | Ground reference | Return path for internal circuitry and output stage; requires low-impedance star connection to minimize measurement error. |
| IN+ (Pin 3) | High-side input | Connects to supply side of shunt; accepts common-mode voltages up to 26V regardless of VS level. |
| IN– (Pin 4) | Low-side input | Connects to load side of shunt; differential input rejects noise when both pins routed symmetrically. |
| VS (Pin 5) | Power supply | 2.7–5.5V supply input; bypass capacitor (0.1μF) required adjacent to pin for stability and PSRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 20mV of VS and GND rails - maximizes dynamic range for 12-bit+ ADCs without level-shifting. |
| High CMRR | 84–110dB - Rejects battery ripple and switching noise in noisy 12V/24V environments during high-side sensing. |
| Low temp drift | 1.0μV/°C VOS drift - Ensures stable zero-current baseline across full automotive temperature range. |
| ESD robustness | 5kV HBM - Withstands handling and board-level ESD events in manufacturing and service environments. |
| Lead-free & green | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - Meets global automotive environmental compliance mandates. |
Applications
| Vehicle e-Pump Motor Control | Automotive Battery Charging System |
|---|---|
Use Scenario: Real-time current monitoring of 12V/24V brushless DC e-pumps in HVAC or brake-by-wire systems. IC Role / Device Role / Timing Role: High-side current sense amplifier providing analog feedback to motor gate driver controller for overcurrent shutdown. Use Value: 85kHz bandwidth detects winding short-circuits within 12μs; 26V common-mode tolerance allows direct placement on battery rail without level shifters. | Use Scenario: Bidirectional charging current measurement in 48V mild-hybrid starter-generator systems. IC Role / Device Role / Timing Role: Low-side shunt monitor feeding analog input of battery management MCU for charge/discharge state estimation. Use Value: ±400μV offset ensures <±0.5A accuracy at 2mΩ shunt; 370μA quiescent current minimizes parasitic drain during vehicle sleep mode. |
| Body Control Module (BCM) Load Monitoring | LED Headlamp Fault Detection |
Use Scenario: Continuous current supervision of solenoid valves and window lift motors in door modules. IC Role / Device Role / Timing Role: Unidirectional current sensor reporting load status to BCM microcontroller via analog input. Use Value: -0.3V to 26V common-mode range accommodates reverse-battery protection diodes and load-dump transients; AEC-Q100 qualification ensures field reliability. | Use Scenario: Fast-response overcurrent detection in adaptive LED headlamp drivers with PWM dimming. IC Role / Device Role / Timing Role: High-bandwidth current monitor triggering immediate PWM shutdown upon LED string short. Use Value: 2V/μs slew rate enables sub-microsecond response to fault events; rail-to-rail output interfaces directly with comparator inputs for hardware-level protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | 20V/V fixed gain, 120kHz BW, ±50μV offset, 2.7–5.5V supply | Lower gain requires larger shunt or signal amplification; better offset but narrower CM range (–4V to 80V) | Select for ultra-low-offset precision in lower-voltage systems where gain can be increased externally. |
| MAX40056ATA+T | 200V/V gain, 400kHz BW, ±125μV offset, 3.3–5.5V supply | Higher bandwidth but limited to 65V CM range and no AEC-Q100 qualification | Select for non-automotive industrial applications needing faster response and tighter offset, with relaxed qualification requirements. |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the ZXCT180QA4W5-7 uniquely balances AEC-Q100 Grade 1 compliance, 26V automotive CM tolerance, and 200V/V gain in a cost-optimized SOT25 footprint - making it optimal for space-constrained, safety-critical current monitoring where external gain stages must be avoided.
Availability
ZXCT180QA4W5-7 is available at Aetrix Electronics and suitable for vehicle e-pump motor control, automotive battery charging systems, and body control module load monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ZXCT180QA4W5-7 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 with ISO/TS 16949 and IATF 16949 certified facilities.
The ZXCT180Q product line delivers AEC-Q100 qualified current sense amplifiers targeting cost-sensitive, high-volume automotive subsystems - including motor drives, lighting, and power distribution - where precision, wide common-mode range, and small footprint are essential.
FAQ
What is the difference between ZXCT180QA4W5-7 and ZXCT180QB4W5-7?
The ZXCT180QA4W5-7 uses Pinout A (OUT on Pin 1), while ZXCT180QB4W5-7 uses Pinout B (OUT on Pin 4). Both share identical electrical specifications, gain (200V/V), and package (SOT25), but differ in output pin location to optimize PCB routing for high-side versus low-side shunt placement - no performance trade-offs exist between them.
Can ZXCT180QA4W5-7 measure bidirectional current?
No. The ZXCT180QA4W5-7 is strictly unidirectional: it measures current flowing from IN+ to IN– only. Its architecture lacks a reference input or bipolar output capability. For bidirectional sensing, Diodes offers the ZXCT181Q series, which includes a REF pin for offset adjustment and supports both directions.
What is the minimum shunt resistance usable with ZXCT180QA4W5-7 at 5V supply?
With 200V/V gain and 5V supply, the maximum output is ~4.98V. To avoid saturation, maximum shunt voltage is 24.9mV. At 100A full-scale, minimum shunt resistance is 249μΩ. Practical minimum depends on noise floor: 40nV/√Hz input noise limits resolution to ~10mA with 1mΩ shunt at 10kHz bandwidth.
Does ZXCT180QA4W5-7 require external compensation capacitors?
No external compensation is needed. The device is internally compensated for stability with CLOAD ≤1nF. A 0.1μF ceramic bypass capacitor between VS and GND is mandatory and must be placed within 2mm of the pins to ensure PSRR >80dB and prevent oscillation under high-CM noise conditions.
ZXCT180QA4W5-7 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
ZXCT180QA4W5-7 FAQ
1.How can I place an order for ZXCT180QA4W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT180QA4W5-7 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 ZXCT180QA4W5-7 reliable?
The price and inventory of ZXCT180QA4W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT180QA4W5-7 is usually 5 days.
3.What payment methods are accepted for ZXCT180QA4W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT180QA4W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT180QA4W5-7?
ZXCT180QA4W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT180QA4W5-7 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 ZXCT180QA4W5-7?
For technical support, including ZXCT180QA4W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT180QA4W5-7 requirements.
6.How does Aetrix verify that ZXCT180QA4W5-7 is sourced from the original manufacturer or authorized distributors?
All ZXCT180QA4W5-7 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 ZXCT180QA4W5-7 meets industry standards.
7.What is the process for return or replacement of ZXCT180QA4W5-7?
All ZXCT180QA4W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT180QA4W5-7, 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 ZXCT180QA4W5-7 part is unused and in its original packaging.
Return procedure for ZXCT180QA4W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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