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Diodes Incorporated ZXCT180QB1W5-7
- Part No.:
- ZXCT180QB1W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ZXCT180QB1W5-7.pdf
- Description:
- CM VOLTAGE OUTPUT SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
ZXCT180QB1W5-7 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive current shunt monitor supporting uni-directional high-side and low-side sensing with 20V/V fixed gain, 400kHz small-signal bandwidth, ±1% max gain error over −40°C to +125°C, and operation from 2.7V to 5.5V supply. It measures shunt voltage across common-mode voltages from −0.3V to 26V and delivers rail-to-rail output for motor control fault detection.
For engineers reviewing the ZXCT180QB1W5-7 datasheet, ZXCT180QB1W5-7 pinout, ZXCT180QB1W5-7 application, or ZXCT180QB1W5-7 equivalent, this device offers verified 20V/V gain accuracy, 2V/µs slew rate, 370µA max quiescent current, and SOT25 package compatibility - critical for automotive body control, e-pump monitoring, and battery charging current sensing.
Technical Context
The ZXCT180QB1W5-7 implements a precision current-sense amplifier topology that isolates input common-mode voltage (−0.3V to 26V) from supply rails (2.7V–5.5V), enabling accurate measurement of shunt voltage regardless of VS level. Its internal architecture supports simultaneous high-side and low-side configurations via Pinout B (OUT on Pin 4).
It features four factory-set gain options; this variant uses Pinout B1 configuration yielding 20V/V gain with ±1% max gain error over temperature and ±400µV max input offset voltage at 12V common-mode. CMRR exceeds 84dB and PSRR reaches ±40µV/V across operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7V to 5.5V - Enables direct interface with 3.3V or 5V microcontrollers without level-shifting. |
| Common-Mode Range | −0.3V to 26V - Supports battery monitoring in 12V/24V automotive systems, including reverse-battery tolerant designs. |
| Fixed Gain | 20V/V - Delivers 20mV output per 1mΩ shunt drop; simplifies ADC scaling for 10-bit/12-bit converters. |
| Small-Signal Bandwidth | 400kHz - Captures fast current transients in motor commutation or fault events without phase lag. |
| Quiescent Current | 370µA max - Minimizes system power budget impact in always-on vehicle modules. |
| Input Offset Voltage | ±400µV max at 12V VCM - Ensures <1mA error at 50mΩ shunt, critical for low-current fault detection. |
| Slew Rate | 2V/µs - Enables sub-microsecond response to step-load changes in e-pump or valve drivers. |
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 | System return path for both analog and power domains; requires star grounding with ADC/microcontroller. |
| VS | Power supply | Supplies internal circuitry; bypass capacitor (0.1µF) must be placed adjacent to this pin for stability. |
| IN+ | High-side shunt connection | Connects to supply side of shunt resistor; tolerates up to 26V regardless of VS voltage. |
| IN− | Low-side shunt connection | Connects to load side of shunt; differential input rejects common-mode noise in noisy automotive environments. |
| OUT | Analog output | Voltage proportional to ILOAD × RSHUNT × 20; rail-to-rail swing enables full utilization of 3.3V/5V ADC input range. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 20mV of VS and GND, maximizing dynamic range for 10-bit ADCs with 3.3V reference. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation in engine bay and under-hood applications. |
| 400kHz bandwidth at 20V/V gain | Enables real-time current profiling during BLDC motor startup and stall detection. |
| 2V/µs slew rate | Supports <500ns response to 1A step change across 50mΩ shunt, essential for overcurrent shutdown timing. |
| ESD protection | 5kV HBM rating ensures robustness against assembly and in-vehicle electrostatic discharge events. |
Applications
| Vehicle Motor Control | Automotive Body Control Module |
|---|---|
Use Scenario: Monitoring current in 12V DC brushless fans and radiator e-pumps. IC Role / Device Role / Timing Role: High-side current sense amplifier providing analog feedback to MCU PWM controller. Use Value: Detects stalled rotor conditions within 2ms using 400kHz bandwidth and 2V/µs slew rate, triggering safe shutdown before thermal damage. |
Use Scenario: Measuring load current in door lock actuators and seat position motors. IC Role / Device Role / Timing Role: Low-side current monitor interfacing directly with 3.3V automotive microcontroller ADC inputs. Use Value: ±400µV offset ensures <10mA sensing resolution at 50mΩ shunt, enabling precise jam detection and power optimization. |
| On-Board Battery Charging | Fault Current Detection |
Use Scenario: Sensing charge/discharge current in 12V lead-acid or LiFePO₄ auxiliary battery systems. IC Role / Device Role / Timing Role: Uni-directional shunt monitor with −0.3V to 26V common-mode range handling reverse-polarity and load-dump transients. Use Value: 26V absolute max common-mode withstands ISO 7637-2 pulse 5a (load dump), eliminating need for external clamping diodes. |
Use Scenario: Real-time overcurrent detection in lighting circuits and HVAC blower drivers. IC Role / Device Role / Timing Role: Fast-response current monitor feeding comparator or digital interrupt input for hardware-level fault isolation. Use Value: 400kHz bandwidth captures sub-cycle current spikes during short-circuit events, enabling <10µs reaction time in safety-critical paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sensing amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | 20V/V gain, 4V/µs slew rate, 350kHz bandwidth, 5-pin SOIC package | Higher slew rate but larger footprint; requires external 0.1µF bypass cap and no integrated ESD enhancement beyond 2kV HBM | Select when higher transient immunity is needed and PCB space allows SOIC; not drop-in due to pinout and package mismatch. |
| MAX40010FAUA+ | 20V/V gain, 350kHz bandwidth, 1.5V/µs slew rate, 6-pin µMAX package | Lower slew rate limits response to fast faults; lacks AEC-Q100 Grade 1 certification and operates only to +105°C | Use only in non-safety-critical cabin modules where extended temperature range is not required. |
Compared with INA240A1QDRQ1 and MAX40010FAUA+, the ZXCT180QB1W5-7 provides superior automotive qualification (Grade 1), smaller SOT25 footprint, higher ESD robustness (5kV vs. 2kV), and faster slew rate than MAX40010 - making it optimal for space-constrained, high-reliability motor and battery monitoring.
Availability
ZXCT180QB1W5-7 is available at Aetrix Electronics and suitable for vehicle motor controls, body control modules, and battery charging systems requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for ZXCT180QB1W5-7 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets.
The ZXCT180Q series was developed specifically for automotive current sensing applications demanding high common-mode rejection, wide temperature operation, and AEC-Q100 qualification - targeting e-pumps, valve actuators, and battery management subsystems.
FAQ
What is the difference between ZXCT180QA1W5-7 and ZXCT180QB1W5-7?
The sole functional difference is pinout configuration: ZXCT180QA1W5-7 places the OUT signal on Pin 1, while ZXCT180QB1W5-7 places OUT on Pin 4. Both share identical electrical specifications - 20V/V gain, ±1% gain error, 400kHz bandwidth, and −40°C to +125°C operation. The dual pinouts provide layout flexibility for routing constraints in high-density automotive PCBs.
Can ZXCT180QB1W5-7 be used for high-side sensing in a 24V system with 3.3V supply?
Yes. The device supports common-mode input voltages from −0.3V to 26V independent of supply voltage, so it accurately senses shunt voltage on the high side of a 24V rail while powered by 3.3V. Its input stage is designed to tolerate 26V on IN+ and IN− even when VS = 3.3V, eliminating need for level shifters or isolated supplies.
Does ZXCT180QB1W5-7 require external compensation components?
No external compensation is required. The device is internally compensated for stable operation with capacitive loads up to 1nF. A 0.1µF ceramic bypass capacitor placed between VS and GND is mandatory for power-supply decoupling, but no additional RC networks, feedback resistors, or compensation caps are needed for standard operation.
Is the gain of ZXCT180QB1W5-7 programmable or selectable externally?
No. Gain is fixed at 20V/V and determined by internal laser-trimmed thin-film resistors during manufacturing. Pinout B1 corresponds exclusively to the 20V/V option; gain selection occurs at wafer sort and cannot be altered post-production. Other gain variants (50/100/200V/V) require different orderable part numbers (e.g., ZXCT180QB2W5-7).
ZXCT180QB1W5-7 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
ZXCT180QB1W5-7 FAQ
1.How can I place an order for ZXCT180QB1W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT180QB1W5-7 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 ZXCT180QB1W5-7 reliable?
The price and inventory of ZXCT180QB1W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT180QB1W5-7 is usually 5 days.
3.What payment methods are accepted for ZXCT180QB1W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT180QB1W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT180QB1W5-7?
ZXCT180QB1W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT180QB1W5-7 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 ZXCT180QB1W5-7?
For technical support, including ZXCT180QB1W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT180QB1W5-7 requirements.
6.How does Aetrix verify that ZXCT180QB1W5-7 is sourced from the original manufacturer or authorized distributors?
All ZXCT180QB1W5-7 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 ZXCT180QB1W5-7 meets industry standards.
7.What is the process for return or replacement of ZXCT180QB1W5-7?
All ZXCT180QB1W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT180QB1W5-7, 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 ZXCT180QB1W5-7 part is unused and in its original packaging.
Return procedure for ZXCT180QB1W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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