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Diodes Incorporated ZXCT180B2W5-7
- Part No.:
- ZXCT180B2W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ZXCT180B2W5-7.pdf
- Description:
- CM VOLTAGE OUTPUT SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
ZXCT180B2W5-7 from Diodes Incorporated is a unidirectional current shunt monitor optimized for high-side and low-side sensing in 26V common-mode systems, operating from 2.7V to 5.5V supply, delivering 50V/V fixed gain, ±1% max gain error over temperature, 400kHz small-signal bandwidth, and rail-to-rail output - deployed in motor control fault detection and automotive power management.
For engineers reviewing the ZXCT180B2W5-7 datasheet, ZXCT180B2W5-7 pinout, ZXCT180B2W5-7 application, or ZXCT180B2W5-7 equivalent, this device supports AEC-Q100 Grade 1 (−40°C to +125°C), offers two OUT-pin configurations (Pin 4 for Version B), integrates 370μA max quiescent current, and enables precise current-to-voltage conversion across −0.3V to 26V common-mode range independent of supply voltage.
Technical Context
The ZXCT180B2W5-7 implements a precision current-sense amplifier topology with input stage designed to reject common-mode voltages up to 26V while powered by only 2.7–5.5V - enabling direct integration into high-voltage bus monitoring without level-shifting circuitry. Its internal resistor network sets a fixed 50V/V gain, and the output stage delivers rail-to-rail swing with 2V/µs slew rate for fast transient response.
It features ±400μV maximum input offset voltage over full temperature range, 1.0μV/°C drift, 84–110dB CMRR, and 40nV/√Hz input-referred noise - ensuring stable, low-error measurements in noisy industrial and automotive environments where shunt-based current feedback is critical for protection and regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7V to 5.5V - enables operation from single Li-ion or 3.3V/5V rails without external regulators |
| Common-Mode Range | −0.3V to 26V - supports bidirectional shunt placement (high-side or low-side) in 12V/24V automotive and industrial systems |
| Fixed Gain | 50V/V - provides 50mV/A scaling for 10mΩ shunt; simplifies ADC interface with predictable full-scale output |
| Bandwidth | 300kHz - sufficient for PWM motor current ripple detection and overcurrent trip within one switching cycle at ≤300kHz |
| Quiescent Current | 370μA max - minimizes system standby power in always-on battery-powered fault-monitoring circuits |
| Offset Voltage | ±400μV max (−40°C to +125°C) - ensures <±20mA error on 50mΩ shunt, critical for accurate overcurrent thresholds |
| Output Swing | Rail-to-rail - delivers full dynamic range to 12-bit+ ADCs without external biasing or gain adjustment |
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 bias and output stage; must connect to low-impedance star ground near shunt |
| VS (Pin 5) | Power supply | Supplies internal circuitry; bypass capacitor (0.1μF) required adjacent to pin for stability |
| IN+ (Pin 1) | High-side shunt connection | Connects to supply side of shunt; withstands up to 26V regardless of VS voltage |
| IN− (Pin 3) | Low-side shunt connection | Connects to load side of shunt; differential input rejects common-mode noise up to 26V |
| OUT (Pin 4) | Voltage output | Delivers VOUT = (ILOAD × RSHUNT) × 50; rail-to-rail swing referenced to GND and VS |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation - suitable for under-hood automotive modules and industrial drives |
| Two OUT-pin configurations (A/B) | Version B places OUT on Pin 4 - improves PCB layout flexibility for compact high-density current-sense routing |
| 400μV max input offset (over temp) | Enables ±20mA accuracy on 50mΩ shunt - meets tight fault-detection thresholds in motor phase protection |
| 2V/µs slew rate | Supports sub-microsecond response to step-load transients - critical for real-time overcurrent shutdown in BLDC controllers |
| 5kV HBM ESD rating | Robust against handling and board-level ESD events - reduces need for external protection in production environments |
Applications
| Motor Control Feedback | Automotive Battery Monitoring |
|---|---|
Use Scenario: Real-time phase current measurement in 3-phase BLDC motor drivers using low-value shunts. IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt voltage to proportional analog output for MCU ADC sampling at ≥10ksps. Use Value: Enables precise torque control and instantaneous overcurrent cutoff (<1µs response) without optical isolation or external op-amps. |
Use Scenario: Continuous monitoring of starter battery discharge/charge current in 12V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional current monitor interfacing with vehicle body control module (BCM) via analog input. Use Value: Delivers ±1% full-scale accuracy across −40°C to +125°C, supporting ISO 16750-2 cold-cranking and hot-soak validation. |
| Solar Inverter DC Link Sensing | Industrial Power Supply OCP |
Use Scenario: DC input current monitoring in string-level solar microinverters with 26V-rated PV inputs. IC Role / Device Role / Timing Role: High-common-mode current sensor feeding isolated sigma-delta ADC for grid synchronization and MPPT algorithms. Use Value: Eliminates need for expensive isolated amplifiers - reduces BOM cost while maintaining 300kHz bandwidth for ripple rejection. |
Use Scenario: Overcurrent protection in programmable lab power supplies with adjustable 0–30V/0–5A outputs. IC Role / Device Role / Timing Role: Low-drift current monitor triggering fast shutdown when load exceeds set threshold. Use Value: 370μA quiescent current and rail-to-rail output enable direct connection to comparator or MCU GPIO with no signal conditioning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A2IDR | 20V/V fixed gain, 4V/V min offset drift, 350kHz bandwidth, SOIC-8 package | Higher gain error (±0.2%), larger footprint, requires external gain-setting resistors for non-standard gains | Select if SOIC-8 PCB footprint compatibility or lower gain (20V/V) is required; not drop-in for SOT25 space-constrained designs |
| MAX40056ATA+T | 50V/V gain, 100kHz bandwidth, 1.5µV/°C offset drift, 8-pin TDFN | Narrower bandwidth limits use in >100kHz PWM systems; higher offset drift impacts accuracy at temperature extremes | Choose only if TDFN thermal performance outweighs bandwidth loss; unsuitable for fast-fault detection in motor drives |
Compared with INA240A2IDR and MAX40056ATA+T, ZXCT180B2W5-7 delivers superior bandwidth (300kHz vs. ≤100kHz), tighter offset drift (1.0µV/°C), smaller SOT25 footprint, and AEC-Q100 Grade 1 certification - making it optimal for space-constrained, high-speed automotive and industrial current monitoring.
Availability
ZXCT180B2W5-7 is available at Aetrix Electronics and suitable for motor control feedback, automotive battery monitoring, solar inverter DC link sensing, and industrial power supply overcurrent protection requiring stable component supply across extended temperature ranges and automotive-grade reliability.
Supply support for ZXCT180B2W5-7 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, AEC-Q100-qualified components for automotive, industrial, and computing markets.
ZXCT180 belongs to Diodes' precision current-sense amplifier product line, engineered specifically for cost-sensitive, high-voltage unidirectional current monitoring in harsh-environment applications where supply voltage headroom is limited.
FAQ
What is the difference between ZXCT180B2W5-7 and ZXCT180A2W5-7?
ZXCT180B2W5-7 places the analog output (OUT) on Pin 4, while ZXCT180A2W5-7 places OUT on Pin 1. Both share identical electrical specifications - 50V/V gain, ±1% gain error, 300kHz bandwidth, and AEC-Q100 Grade 1 qualification - but differ solely in pin assignment to optimize PCB layout routing for high-side versus low-side shunt placements.
Can ZXCT180B2W5-7 measure bidirectional current?
No. ZXCT180B2W5-7 is strictly unidirectional: it measures current flowing from IN+ to IN− only. Its output voltage increases with increasing load current and cannot go below GND. For bidirectional sensing, Diodes' ZXCT108 or Texas Instruments' INA226 would be required alternatives.
What is the minimum shunt resistance compatible with ZXCT180B2W5-7 at 5V supply?
With 50V/V gain and rail-to-rail output (0V to 5V), the maximum measurable shunt voltage is 100mV. At 5V supply and 370μA quiescent current, the minimum recommended shunt is 10mΩ - yielding 100mV at 10A load, which avoids excessive self-heating while preserving resolution and thermal stability.
Does ZXCT180B2W5-7 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 placed directly between VS and GND pins is mandatory for high-frequency PSRR and noise immunity, per Diodes' layout guidelines in DS46641 Rev. 1–2.
ZXCT180B2W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Cut Tape (CT)
- 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
ZXCT180B2W5-7 FAQ
1.How can I place an order for ZXCT180B2W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT180B2W5-7 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 ZXCT180B2W5-7 reliable?
The price and inventory of ZXCT180B2W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT180B2W5-7 is usually 5 days.
3.What payment methods are accepted for ZXCT180B2W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT180B2W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT180B2W5-7?
ZXCT180B2W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT180B2W5-7 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 ZXCT180B2W5-7?
For technical support, including ZXCT180B2W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT180B2W5-7 requirements.
6.How does Aetrix verify that ZXCT180B2W5-7 is sourced from the original manufacturer or authorized distributors?
All ZXCT180B2W5-7 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 ZXCT180B2W5-7 meets industry standards.
7.What is the process for return or replacement of ZXCT180B2W5-7?
All ZXCT180B2W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT180B2W5-7, 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 ZXCT180B2W5-7 part is unused and in its original packaging.
Return procedure for ZXCT180B2W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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