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Diodes Incorporated ZXCT180QB2W5-7
- Part No.:
- ZXCT180QB2W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ZXCT180QB2W5-7.pdf
- Description:
- CM VOLTAGE OUTPUT SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
ZXCT180QB2W5-7 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive current shunt monitor supporting uni-directional high-side and low-side sensing at common-mode voltages up to 26V, with fixed 50V/V gain, 400kHz small-signal bandwidth (at 20V/V), and rail-to-rail output swing - used in vehicle motor control, e-pump fault detection, and battery charging systems.
For engineers reviewing the ZXCT180QB2W5-7 datasheet, ZXCT180QB2W5-7 pinout, ZXCT180QB2W5-7 application, or ZXCT180QB2W5-7 equivalent, this part delivers verified 50V/V gain accuracy (±1% max over temperature), ±400μV max input offset, 2V/μs slew rate, and SOT25 packaging for space-constrained automotive PCB layouts.
Technical Context
The ZXCT180QB2W5-7 implements a precision current-sense amplifier topology that operates with supply voltage (2.7–5.5V) independent of input common-mode range (−0.3V to +26V), enabling direct measurement across shunts in 12V/24V automotive buses without level-shifting circuitry. Its internal resistor network sets fixed 50V/V gain for Pinout B configuration.
It features rail-to-rail output drive capability into 10kΩ loads, 84–110dB CMRR over temperature, and 2V/μs large-signal slew rate - enabling fast response to transient load currents in motor control and fault-detection applications where timing-critical current thresholds must be detected within microseconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50V/V (fixed, Pinout B2 configuration) |
| Common-Mode Range | −0.3V to +26V - measures shunt voltage regardless of supply voltage or bus polarity |
| Small-Signal Bandwidth | 300kHz (CL = 10pF) - supports PWM-based motor current sampling at ≤150kHz switching frequencies |
| Input Offset Voltage | ±400μV max (−40°C to +125°C) - enables accurate sub-10mA current resolution with 10mΩ shunt |
| Quiescent Current | 370μA max - suitable for always-on automotive modules with strict power budgets |
| Slew Rate | 2V/μs - ensures <500ns output response to 1V step input, critical for overcurrent trip timing |
| Operating Temperature | −40°C to +125°C (AEC-Q100 Grade 1) - qualified for under-hood and body-control module environments |
Pinout & Package
Package: 5-pin SOT25 (3.0mm × 1.6mm × 1.1mm), lead-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for supply and signal; must connect to low-impedance star ground near shunt |
| VS | Power supply | 2.7–5.5V supply input; requires 0.1μF bypass capacitor placed adjacent to pin |
| IN+ | Analog input (+) | Connects to supply side of shunt; withstands −0.3V to +26V regardless of VS presence |
| IN− | Analog input (−) | Connects to load side of shunt; differential input referenced to IN+ for VSENSE amplification |
| OUT | Analog output | Pin 4 in Pinout B; voltage = (ILOAD × RSHUNT) × 50; rail-to-rail swing (GND+0.5mV to VS−20mV) |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 0.5mV of GND and 20mV below VS - maximizes ADC dynamic range with 3.3V or 5V microcontrollers |
| Fixed 50V/V gain | Eliminates external gain-setting resistors and layout sensitivity - reduces BOM count and improves production consistency |
| −0.3V to +26V common-mode range | Enables direct high-side sensing on 24V battery rails without auxiliary supplies or isolation - simplifies e-pump and valve driver designs |
| 2V/μs slew rate | Supports <500ns response to 1V output step - meets timing requirements for fast overcurrent shutdown in BLDC motor controllers |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with PPAP support - satisfies OEM requirements for body electronics and powertrain subsystems |
Applications
| Vehicle Motor Control | Vehicle E-Pump Fault Detection |
|---|---|
Use Scenario: Monitoring phase current in 12V/24V brushed or BLDC motors driving HVAC fans, seat adjusters, or power windows. IC Role / Device Role / Timing Role: High-side current sense amplifier providing real-time analog feedback to MCU PWM controller for torque regulation and stall detection. Use Value: 300kHz bandwidth and 2V/μs slew rate enable accurate current sampling within PWM dead-time intervals, preventing false overcurrent trips during commutation. |
Use Scenario: Detecting short-circuit or locked-rotor faults in automotive coolant or oil e-pumps operating on 24V battery systems. IC Role / Device Role / Timing Role: Low-latency current monitor feeding comparator or ADC input to trigger immediate pump shutdown within 1–2μs of fault onset. Use Value: ±400μV max offset ensures reliable 50mA fault threshold detection using 100mΩ shunt, minimizing false positives during startup inrush. |
| Automotive Body Control Unit | Battery Charging/Discharging Monitor |
Use Scenario: Measuring load current in centralized body control modules managing lighting, door locks, and window lifters. IC Role / Device Role / Timing Role: Uni-directional current sensor interfacing with 12-bit SAR ADC to log cumulative energy usage and detect open/short wiring faults. Use Value: 370μA quiescent current allows continuous monitoring during sleep mode without exceeding 100μA system budget limits. |
Use Scenario: Sensing charge/discharge current in 12V start-stop battery management and wireless charging receiver circuits. IC Role / Device Role / Timing Role: Bidirectional-capable (via external circuit) current monitor measuring bidirectional flow through shared shunt in buck-boost charging paths. Use Value: −0.3V to +26V common-mode range accommodates reverse-polarity protection diodes and negative transients during load dump events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A2QDRQ1 | 50V/V gain, 4V/V to 500V/V programmable via external resistors; higher 105dB CMRR; 10x higher quiescent current (1.8mA) | Requires external gain resistors and layout optimization; better for ultra-high-precision but less space-efficient | Select when >100dB CMRR or adjustable gain is required; avoid if board area or standby power is constrained |
| MAX40056ATA+T | 50V/V gain, 350kHz bandwidth, ±150μV max offset, 1.2mA IQ; supports bidirectional sensing natively | Native bidirectional output swing (±VREF); requires dual-supply or reference biasing for unidirectional use | Select when bidirectional current measurement is needed; not drop-in for unidirectional-only ZXCT180QB2W5-7 layouts |
Compared with INA240A2QDRQ1 and MAX40056ATA+T, ZXCT180QB2W5-7 offers the smallest footprint (SOT25), lowest quiescent current, and simplest layout (no external resistors), making it optimal for cost-sensitive, space-constrained automotive modules requiring fixed-gain unidirectional sensing.
Availability
ZXCT180QB2W5-7 is available at Aetrix Electronics and suitable for vehicle motor controls, e-pump fault detection, and battery charging systems requiring stable component supply across automotive production lifecycles.
Supply support for ZXCT180QB2W5-7 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 ICs, specializing in high-reliability solutions for automotive, industrial, and consumer markets.
The ZXCT180Q product line delivers AEC-Q100-qualified current-sense amplifiers optimized for cost-effective, high-accuracy shunt-based monitoring in 12V/24V automotive subsystems - targeting body electronics, powertrain actuators, and electrified power conversion.
FAQ
What is the difference between Pinout A and Pinout B in ZXCT180QB2W5-7?
ZXCT180QB2W5-7 uses Pinout B, where the OUT pin is located on Pin 4 (not Pin 1 as in Pinout A). This layout provides flexibility for PCB routing around shunt placement - Pinout B places OUT adjacent to IN− and GND, reducing trace length in high-density motor driver layouts. Both pinouts share identical electrical performance and gain options.
Can ZXCT180QB2W5-7 measure current in high-side configurations with 24V battery supply?
Yes. The device supports common-mode input voltages from −0.3V to +26V independent of its 2.7–5.5V supply voltage. When placed on the high-side of a 24V battery rail, IN+ connects to battery+, IN− to shunt output, and VS is powered from a local 3.3V or 5V regulator - enabling direct measurement without level shifters or isolated supplies.
What is the maximum capacitive load the OUT pin can drive without instability?
The ZXCT180QB2W5-7 is stable with up to 1nF capacitive load on the OUT pin, per datasheet specification. For ADC input filtering, a series resistor (e.g., 10Ω) should isolate the 0.1μF–1nF capacitor from the amplifier output to prevent peaking or oscillation. Larger capacitances require external buffering.
Does ZXCT180QB2W5-7 support bidirectional current sensing?
No - ZXCT180QB2W5-7 is strictly uni-directional. Its output voltage increases linearly with positive current flow (IN+ to IN−). To sense reverse current, an external reference-biasing circuit or a dedicated bidirectional amplifier like MAX40056 is required. The device's −0.3V common-mode lower limit does not imply reverse-current capability.
ZXCT180QB2W5-7 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
ZXCT180QB2W5-7 FAQ
1.How can I place an order for ZXCT180QB2W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT180QB2W5-7 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 ZXCT180QB2W5-7 reliable?
The price and inventory of ZXCT180QB2W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT180QB2W5-7 is usually 5 days.
3.What payment methods are accepted for ZXCT180QB2W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT180QB2W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT180QB2W5-7?
ZXCT180QB2W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT180QB2W5-7 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 ZXCT180QB2W5-7?
For technical support, including ZXCT180QB2W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT180QB2W5-7 requirements.
6.How does Aetrix verify that ZXCT180QB2W5-7 is sourced from the original manufacturer or authorized distributors?
All ZXCT180QB2W5-7 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 ZXCT180QB2W5-7 meets industry standards.
7.What is the process for return or replacement of ZXCT180QB2W5-7?
All ZXCT180QB2W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT180QB2W5-7, 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 ZXCT180QB2W5-7 part is unused and in its original packaging.
Return procedure for ZXCT180QB2W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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