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Diodes Incorporated ZXCT180QA3W5-7
- Part No.:
- ZXCT180QA3W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ZXCT180QA3W5-7.pdf
- Description:
- CM VOLTAGE OUTPUT SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,051
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Product details
Overview
ZXCT180QA3W5-7 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive current shunt monitor supporting uni-directional high-side and low-side sensing with 100V/V fixed gain, 400μV max input offset voltage over temperature, ±1% gain error, and 150kHz small-signal bandwidth at 100V/V. It operates from 2.7V to 5.5V supply while measuring shunt voltages across -0.3V to 26V common-mode range, enabling fault current detection in 12V/24V vehicle motor control systems.
For engineers reviewing the ZXCT180QA3W5-7 datasheet, ZXCT180QA3W5-7 pinout, ZXCT180QA3W5-7 application, or ZXCT180QA3W5-7 equivalent, key selection criteria include its SOT25 package compatibility, rail-to-rail output swing, 370μA max quiescent current, and support for fast transient response in battery charging and e-pump current monitoring.
Technical Context
The ZXCT180QA3W5-7 implements a precision current-sense amplifier topology with input-stage biasing that enables accurate measurement of differential voltages across shunts at common-mode potentials up to 26V - independent of its 2.7–5.5V supply rail. Its internal resistor network sets a fixed 100V/V gain, eliminating external gain-setting components.
It features a CMRR of 84–110dB over -40°C to +125°C and PSRR of ±8μV/V, ensuring stable output under supply ripple and common-mode transients. The device delivers 2V/μs slew rate and supports 1nF maximum capacitive load without oscillation, making it suitable for dynamic current profiling in automotive body control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - Fixed internal ratio; output = 100 × (IN+ − IN−); eliminates external resistor matching errors |
| Common-Mode Range | −0.3V to 26V - Enables direct connection to battery rail or load side without level-shifting circuitry |
| Input Offset Voltage | ±400μV max (−40°C to +125°C) - Limits worst-case current measurement error to ≤0.4mV across shunt |
| Bandwidth | 150kHz - Supports detection of rapid current surges in motor stall or short-circuit events |
| Quiescent Current | 370μA max - Enables always-on monitoring in low-power vehicle subsystems without excessive battery drain |
| Output Swing | (VS − 0.03V) to (GND + 0.005V) - Rail-to-rail capability ensures full ADC utilization with 3.3V or 5V microcontrollers |
| Operating Temp | −40°C to +125°C - Validated for engine bay and under-hood placement per AEC-Q100 Grade 1 |
Pinout & Package
Package: 5-pin SOT25 (3.0mm × 1.6mm × 1.1mm), moisture sensitivity level 1, matte tin-plated leads, RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 2) | Reference ground | Return path for internal circuitry; must be star-connected to shunt and ADC ground to minimize offset error |
| VS (Pin 5) | Power supply | 2.7–5.5V supply input; requires 0.1μF ceramic bypass capacitor placed adjacent to pin |
| IN+ (Pin 3) | High-side sense input | Connects to supply side of shunt; withstands up to 26V regardless of VS presence |
| IN− (Pin 4) | Low-side sense input | Connects to load side of shunt; enables bidirectional layout flexibility for PCB routing |
| OUT (Pin 1) | Analog output | Voltage proportional to shunt current × 100; drives 10kΩ loads directly into MCU ADC or comparator |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 30mV of VS and 5mV of GND - maximizes dynamic range for 12-bit ADCs |
| Fixed 100V/V gain | No external resistors required - reduces BOM count and layout sensitivity to parasitic capacitance |
| AEC-Q100 Grade 1 | Qualified for −40°C to +125°C operation - certified for powertrain-adjacent and under-hood applications |
| Low input offset drift | 1.0μV/°C - contributes ≤125μV offset shift over full temperature range, improving long-term accuracy |
| ESD robustness | 5kV HBM - protects against assembly handling and in-system electrostatic discharge in vehicle harness environments |
Applications
| Vehicle Motor Control | Automotive Battery Management |
|---|---|
|
Use Scenario: Monitoring current in 12V/24V brushed DC motors used in HVAC actuators and seat adjusters. IC Role / Device Role / Timing Role: High-side current sensing amplifier providing real-time load feedback to MCU PWM controller. Use Value: Enables stall detection and soft-start sequencing using 150kHz bandwidth and 2V/μs slew rate to capture transient overcurrents. |
Use Scenario: Measuring charge/discharge current in 12V lead-acid or LiFePO₄ auxiliary batteries. IC Role / Device Role / Timing Role: Low-quiescent-current (370μA) current monitor interfacing with fuel-gauge MCU ADC. Use Value: Maintains accuracy across −40°C to +125°C with ±400μV offset, supporting cold-cranking and thermal runaway detection. |
| Electric Power Steering (EPS) Assist | Onboard Charger Fault Detection |
|
Use Scenario: Sensing motor phase current in EPS torque-assist modules where space and thermal constraints limit sensor options. IC Role / Device Role / Timing Role: Low-side shunt monitor with 26V common-mode tolerance, placed between H-bridge and ground plane. Use Value: Delivers 100V/V gain and rail-to-rail output to ensure full-scale resolution on 3.3V MCU ADCs without signal conditioning. |
Use Scenario: Detecting overcurrent faults during AC/DC conversion in 3.3kW onboard chargers for PHEVs. IC Role / Device Role / Timing Role: Fast-response current monitor on DC-link side, feeding protection logic before IGBT gate driver shutdown. Use Value: 150kHz bandwidth and 2V/μs slew rate enable sub-10μs fault response time, meeting ISO 6469-3 short-circuit safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A3QDGKRQ1 | 20V/V gain, 350kHz bandwidth, ±10μV offset, dual supply capable | Requires external gain resistors; better for multi-gain designs but larger footprint (VSSOP-8) | Select when programmable gain or bipolar supply operation is needed; not drop-in for ZXCT180QA3W5-7's fixed 100V/V SOT25 layout |
| MAX40056ATA+T | 100V/V gain, 250kHz bandwidth, ±500μV offset, 1.8–5.5V supply | Higher offset (500μV vs. 400μV) and wider temp range (−40°C to +150°C), but no AEC-Q100 certification | Use only in non-automotive industrial applications requiring extended junction temperature; lacks PPAP documentation |
Compared with INA240A3QDGKRQ1 and MAX40056ATA+T, the ZXCT180QA3W5-7 offers tighter offset spec, AEC-Q100 compliance, and smaller SOT25 footprint - making it optimal for space-constrained, production-ready automotive current monitoring where fixed 100V/V gain suffices.
Availability
ZXCT180QA3W5-7 is available at Aetrix Electronics and suitable for vehicle motor controls, battery management systems, electric power steering assist, and onboard charger fault detection requiring stable component supply across automotive production lifecycles.
Supply support for ZXCT180QA3W5-7 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 cost-sensitive, space-constrained automotive current sensing applications - delivering AEC-Q100 qualified performance in miniature SOT25 packages with minimal external components.
FAQ
What is the difference between ZXCT180QA3W5-7 and ZXCT180QB3W5-7?
ZXCT180QA3W5-7 uses Pinout A (OUT on Pin 1), while ZXCT180QB3W5-7 uses Pinout B (OUT on Pin 4). Both deliver identical 100V/V gain and electrical performance, but the pinout variation allows optimized PCB layout - Pinout A suits top-layer routing near shunt's supply side, Pinout B facilitates bottom-layer routing near load side.
Can ZXCT180QA3W5-7 measure bidirectional current?
No. The ZXCT180QA3W5-7 is a uni-directional current monitor designed only for positive current flow from IN+ to IN−. Its architecture does not support negative differential input voltage or zero-crossing detection; use ZXCT108 or similar bi-directional amplifiers for regenerative braking or battery charge/discharge monitoring.
Is external filtering required on the OUT pin?
Not for basic operation - the device drives 10kΩ loads directly and tolerates up to 1nF capacitive load without instability. However, for noisy environments (e.g., near switching regulators), a 1–10kΩ series resistor plus 100pF RC filter at the OUT pin improves EMI immunity without degrading 150kHz bandwidth.
Does ZXCT180QA3W5-7 require a reference voltage or calibration?
No. It operates with only VS and GND connections; the internal precision resistor network sets 100V/V gain and requires no external reference or factory calibration. Offset voltage is trimmed at wafer level and specified at ±400μV max over temperature - sufficient for <1% current measurement accuracy with typical 1–10mΩ shunts.
ZXCT180QA3W5-7 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
ZXCT180QA3W5-7 FAQ
1.How can I place an order for ZXCT180QA3W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT180QA3W5-7 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 ZXCT180QA3W5-7 reliable?
The price and inventory of ZXCT180QA3W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT180QA3W5-7 is usually 5 days.
3.What payment methods are accepted for ZXCT180QA3W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT180QA3W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT180QA3W5-7?
ZXCT180QA3W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT180QA3W5-7 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 ZXCT180QA3W5-7?
For technical support, including ZXCT180QA3W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT180QA3W5-7 requirements.
6.How does Aetrix verify that ZXCT180QA3W5-7 is sourced from the original manufacturer or authorized distributors?
All ZXCT180QA3W5-7 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 ZXCT180QA3W5-7 meets industry standards.
7.What is the process for return or replacement of ZXCT180QA3W5-7?
All ZXCT180QA3W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT180QA3W5-7, 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 ZXCT180QA3W5-7 part is unused and in its original packaging.
Return procedure for ZXCT180QA3W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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