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Diodes Incorporated ZXCT180A1W5-7
- Part No.:
- ZXCT180A1W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ZXCT180A1W5-7.pdf
- Description:
- CM VOLTAGE OUTPUT SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
ZXCT180A1W5-7 from Diodes Incorporated is a unidirectional current shunt monitor IC designed for high-accuracy, low-side and high-side current sensing in automotive and industrial systems. It delivers 20V/V fixed gain, ±1% max gain error over –40°C to +125°C, 400kHz small-signal bandwidth, rail-to-rail output swing, and operates from 2.7V–5.5V supply while measuring across shunts at common-mode voltages up to 26V - enabling use in 12V/24V battery-powered motor control and fault detection circuits.
For engineers reviewing the ZXCT180A1W5-7 datasheet, ZXCT180A1W5-7 pinout, ZXCT180A1W5-7 application, or ZXCT180A1W5-7 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, SOT25 package compatibility with space-constrained PCBs, 370μA max quiescent current for low-power designs, and dual pinout options (Pin 1 or Pin 4 OUT) supporting flexible layout routing for noise-sensitive analog signal paths.
Technical Context
The ZXCT180A1W5-7 employs a precision current-sense amplifier topology that isolates measurement from supply voltage constraints, allowing accurate sensing at –0.3V to 26V common-mode while powered only by 2.7V–5.5V. Its input stage supports differential voltage sensing down to ±100μV offset (typ), with 1μV/°C drift and 84–110dB CMRR across temperature.
With 2V/μs slew rate and 400kHz bandwidth at 20V/V gain, it resolves fast transient load currents - critical for real-time overcurrent protection in BLDC motor drives and solar inverter DC-link monitoring. Output remains rail-to-rail (VS – 0.03V to GND + 0.005V) into 10kΩ loads, ensuring compatibility with 12-bit ADCs and microcontroller analog inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7V to 5.5V - enables direct interface with 3.3V or 5V MCU domains without level-shifting. |
| Common-Mode Range | –0.3V to 26V - supports both high-side and low-side shunt placement in 12V/24V automotive and industrial buses. |
| Fixed Gain | 20V/V - scales 10mV shunt voltage to 200mV output, optimizing dynamic range for 12-bit ADCs with 3.3V reference. |
| Gain Error | ±1% max over –40°C to +125°C - ensures <1% absolute current measurement error without calibration in automotive environments. |
| Bandwidth | 400kHz - captures sub-microsecond current transients during MOSFET switching or short-circuit events. |
| Quiescent Current | 370μA max - allows continuous monitoring in always-on subsystems without compromising battery life. |
| Offset Voltage | ±400μV max over temperature - corresponds to ≤4mA error on a 10mΩ shunt, meeting ASIL-B functional safety thresholds. |
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 (Pin 2) | Ground reference | Primary return path for internal biasing and output stage; must connect to star ground near shunt resistor. |
| VS (Pin 5) | Power supply | Supplies internal circuitry; requires 0.1μF ceramic bypass capacitor placed adjacent to pin. |
| IN+ (Pin 3) | Positive input | Connects to supply side of shunt; tolerates up to 26V regardless of VS voltage - enables high-side sensing. |
| IN– (Pin 4) | Negative input | Connects to load side of shunt; differential input rejects common-mode noise in noisy motor drive environments. |
| OUT (Pin 1) | Analog output | Voltage proportional to (ILOAD × RSHUNT) × 20; rail-to-rail swing ensures full ADC utilization without external amplification. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings from GND + 0.0005V to VS – 0.03V, maximizing signal-to-noise ratio when interfacing with 3.3V microcontrollers. |
| AEC-Q100 Grade 1 | Qualified for –40°C to +125°C ambient operation - meets automotive powertrain and body electronics reliability requirements. |
| Low offset drift | 1μV/°C max - limits thermal-induced current measurement error to <1.3mA over full temperature range on 10mΩ shunt. |
| ESD robustness | 5kV HBM - withstands handling and board-level ESD events without latch-up or parametric shift. |
| Dual pinout variants | OUT on Pin 1 (A-series) or Pin 4 (B-series) - simplifies PCB routing around shunt location and reduces trace inductance. |
Applications
| Motor Control Systems | Automotive Battery Management |
|---|---|
|
Use Scenario: Real-time phase current monitoring in 3-phase BLDC motor drivers for e-bike controllers and HVAC blowers. IC Role / Device Role / Timing Role: High-side current sense amplifier providing isolated analog feedback to MCU PWM timers for field-oriented control (FOC). Use Value: 400kHz bandwidth captures commutation spikes; ±1% gain error enables torque accuracy within ±2% without factory calibration. |
Use Scenario: Continuous discharge current monitoring in 12V lead-acid and LiFePO₄ starter batteries for start-stop systems. IC Role / Device Role / Timing Role: Low-quiescent-current shunt monitor feeding ADC input of battery monitoring IC (e.g., BQ769x0) for Coulomb counting. Use Value: 370μA max IQ extends sleep-mode battery life; 26V common-mode handles load dump transients up to ISO 7637-2 Pulse 5a. |
| Solar Microinverters | Industrial Power Supplies |
|
Use Scenario: DC-link current sensing in single-phase transformerless microinverters for residential PV arrays. IC Role / Device Role / Timing Role: High-side current monitor detecting ground-fault leakage and overcurrent faults before MPPT controller shutdown. Use Value: –0.3V to 26V common-mode range accommodates floating DC bus; rail-to-rail output interfaces directly with isolation amplifier inputs. |
Use Scenario: Output current monitoring in programmable lab power supplies with 0–30V/0–10A range. IC Role / Device Role / Timing Role: Precision current sense element feeding digital control loop (e.g., C2000 MCU) for constant-current regulation and OCP response. Use Value: 20V/V gain and ±400μV offset enable 10mA resolution at 10A full scale; 2V/μs slew rate ensures <500ns OCP reaction time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1DR | 20V/V gain, 4V/V to 500V/V programmable via external resistors; 105dB CMRR; 100kHz bandwidth at 20V/V. | Requires external gain-setting resistors and compensation network; better for multi-gain systems but larger footprint. | Select if programmable gain or higher CMRR is required; avoid if board space or BOM count reduction is critical. |
| MAX4080TASA+ | 20V/V gain, 250kHz bandwidth, 1.5μV/°C offset drift, 500μA IQ, SO8 package. | Larger SO8 footprint; higher IQ increases power loss in always-on monitoring; no AEC-Q100 qualification. | Select only for non-automotive industrial use where SO8 assembly infrastructure exists and thermal performance dominates. |
Compared with INA240A1DR and MAX4080TASA+, the ZXCT180A1W5-7 offers superior bandwidth-per-power (400kHz at 370μA vs. 250kHz at 500μA), AEC-Q100 qualification out-of-box, and SOT25 size - making it optimal for cost-sensitive, space-constrained automotive motor control where fixed 20V/V gain suffices.
Availability
ZXCT180A1W5-7 is available at Aetrix Electronics and suitable for automotive motor control, battery management systems, solar microinverter protection, and industrial power supply current monitoring requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for ZXCT180A1W5-7 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 integrated circuits, specializing in high-reliability analog and power solutions for automotive, industrial, and computing markets.
The ZXCT180 belongs to Diodes' precision current-sensing amplifier product line, engineered specifically for accurate, low-power, high-common-mode current measurement in harsh automotive and industrial environments - with emphasis on AEC-Q100 compliance and minimal external components.
FAQ
What is the maximum common-mode voltage the ZXCT180A1W5-7 can measure?
The ZXCT180A1W5-7 supports a common-mode input voltage range of –0.3V to 26V, independent of its 2.7V–5.5V supply voltage. This allows direct high-side sensing on 24V automotive buses without level-shifting circuitry, and operation below ground for certain fault-detection configurations.
Does the ZXCT180A1W5-7 require external gain-setting resistors?
No. The ZXCT180A1W5-7 integrates fixed 20V/V gain internally - no external resistors are needed. This eliminates gain-setting errors, reduces PCB area, improves temperature stability, and simplifies design validation compared to adjustable current-sense amplifiers.
Is the ZXCT180A1W5-7 qualified for automotive applications?
Yes. The ZXCT180A1W5-7 is AEC-Q100 Grade 1 qualified (–40°C to +125°C), manufactured in IATF 16949-certified facilities, and rated for automotive powertrain and body electronics. Its 5kV HBM ESD rating and 26V common-mode tolerance meet ISO 16750-2 electrical stress requirements.
How does the dual pinout option (A vs. B) affect PCB layout?
Pinout A places the OUT signal on Pin 1, while Pinout B places it on Pin 4 - enabling optimized routing depending on shunt location. When the shunt is near the power supply rail, Pinout A minimizes trace length from IN+ to OUT; when near ground, Pinout B reduces IN– to OUT coupling. Both maintain identical electrical performance.
ZXCT180A1W5-7 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
ZXCT180A1W5-7 FAQ
1.How can I place an order for ZXCT180A1W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT180A1W5-7 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 ZXCT180A1W5-7 reliable?
The price and inventory of ZXCT180A1W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT180A1W5-7 is usually 5 days.
3.What payment methods are accepted for ZXCT180A1W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT180A1W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT180A1W5-7?
ZXCT180A1W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT180A1W5-7 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 ZXCT180A1W5-7?
For technical support, including ZXCT180A1W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT180A1W5-7 requirements.
6.How does Aetrix verify that ZXCT180A1W5-7 is sourced from the original manufacturer or authorized distributors?
All ZXCT180A1W5-7 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 ZXCT180A1W5-7 meets industry standards.
7.What is the process for return or replacement of ZXCT180A1W5-7?
All ZXCT180A1W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT180A1W5-7, 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 ZXCT180A1W5-7 part is unused and in its original packaging.
Return procedure for ZXCT180A1W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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