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Diodes Incorporated ZXCT1110W5-7
- Part No.:
- ZXCT1110W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ZXCT1110W5-7.pdf
- Description:
- IC CURRENT MONITOR SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:52,908
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Product details
Overview
ZXCT1110W5-7 from Diodes Incorporated is a high-side unipolar current sense monitor in SOT-25 (5-pin SOT23) package, featuring 4mA/V transconductance, ±1.8% transconductance error, and 3µA quiescent current. It operates from 2.5V to 36V common-mode input range and delivers output current proportional to sensed differential voltage across a shunt resistor - used in automotive battery management, industrial 24V power rails, and overcurrent protection circuits.
For engineers reviewing the ZXCT1110W5-7 datasheet, ZXCT1110W5-7 pinout, ZXCT1110W5-7 application, or ZXCT1110W5-7 equivalent, key selection criteria include its separate GND pin (vs. ZXCT1107/09), 40µA ±4µA output offset at 10mV VSENSE, -40°C to +125°C operation, and compatibility with low-power microcontroller ADC interfaces via external RGAIN resistor.
Technical Context
The ZXCT1110 implements a high-side current sensing architecture with dedicated GND pin for improved output offset control and reduced measurement error versus 3-pin variants. Its internal transconductance amplifier converts VSENSE = VS+ − VS− into a proportional output current referenced to GND.
It requires no external supply rail - powered directly from the sensed high-side rail (VS+) - and supports linear operation from 0 to 500mV VSENSE with guaranteed monotonicity. The device's 0.65MHz small-signal bandwidth and 0.1–0.4µA/V common-mode rejection enable stable performance in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Transconductance (GT) | 4.0 mA/V ±1.8% - defines precise IOUT = GT × VSENSE scaling for accurate current-to-voltage conversion |
| Output Offset Current (IOO) | ±4 µA at VSENSE = 10 mV - enables low-error baseline correction in precision monitoring |
| Quiescent Current (IQ) | 3 µA - minimizes parasitic loading on high-side rail and preserves system efficiency |
| Common-Mode Input Range | 2.5 V to 36 V - supports direct sensing on 12V/24V/36V industrial and automotive rails without level-shifting |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial control cabinet deployment |
| Small-Signal Bandwidth | 0.65 MHz - sufficient for fast transient detection in overcurrent fault response (<1.5 µs rise time) |
| Supply Independence | No external VCC required - powered solely by sensed rail (VS+), simplifying BOM and layout |
Pinout & Package
Package: SOT-25 (5-pin SOT23), surface-mount, RoHS-compliant, thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connection | Internally unconnected; must be left floating or tied to GND per layout best practice |
| 2 (GND) | Ground Reference | Substrate and output current return path; separates output reference from high-side rail for lower offset error |
| 3 (OUT) | Current Output | Sinks proportional current (IOUT = GT × VSENSE); connects to RGAIN for voltage conversion |
| 4 (S+) | Positive Sense Input | High-side shunt terminal; supplies internal circuitry and accepts up to 36V common-mode voltage |
| 5 (S−) | Negative Sense Input | Shunt return terminal; forms differential pair with S+; input bias current ≤100 nA at 25°C |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated GND pin | Enables true ground-referenced output current, reducing offset drift vs. 3-pin variants that share OUT/GND |
| Ultra-low IQ (3 µA) | Minimizes impact on measured load current and eliminates need for shutdown control in always-on systems |
| Wide 2.5–36 V common-mode range | Supports direct integration into 12V automotive, 24V PLC, and 36V solar charge controller rails |
| Linear transconductance up to 500 mV VSENSE | Ensures predictable IOUT scaling across full dynamic range without clipping or gain compression |
| AEC-Q100 Grade 1 qualified | Validated for automotive applications requiring −40°C to +125°C operation and robust reliability |
Applications
| Automotive Battery Monitoring | Industrial 24V Power Rail Protection |
|---|---|
Use Scenario: Real-time monitoring of starter battery discharge/charge current in engine control units. IC Role / Device Role / Timing Role: High-side current sensor converting shunt voltage to proportional output current for MCU ADC sampling. Use Value: Enables accurate state-of-charge estimation and short-circuit detection with <±2.62% error at 100mV VSENSE, leveraging dedicated GND for stable offset. | Use Scenario: Overcurrent detection in programmable logic controller (PLC) backplane power distribution. IC Role / Device Role / Timing Role: Fault-sensing element feeding comparator or microcontroller interrupt on current exceedance. Use Value: Delivers 0.65MHz bandwidth for sub-2µs fault response and withstands 36V rail transients without external protection. |
| USB-C PD Power Delivery Monitoring | LED Driver Current Regulation |
Use Scenario: Bidirectional current sensing in USB-C power delivery sink applications with 5–20V input range. IC Role / Device Role / Timing Role: High-side monitor providing isolated current feedback to PD controller for adaptive load management. Use Value: Operates down to 2.5V common-mode, enabling accurate sensing even during low-voltage negotiation phases. | Use Scenario: Constant-current regulation feedback in high-brightness LED backlight drivers for displays. IC Role / Device Role / Timing Role: Precision shunt-based current feedback source for analog dimming loop control. Use Value: 4mA/V transconductance and ±1.8% error support tight current tolerance (<±3%) across temperature in LED thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4080TASA+ | Higher supply current (75µA), 8-pin SOIC, fixed 20V/V gain; requires external VCC | Less suitable for ultra-low-power or space-constrained designs; better for fixed-gain voltage-output use cases | Select when voltage-output interface and higher accuracy at 25°C are prioritized over quiescent power and board area |
| INA219AIDR | I²C digital output, integrated ADC, 1% gain error, 26V max common-mode, 1mA IQ | Requires MCU firmware support; adds communication overhead but eliminates external signal conditioning | Select when digital BOM consolidation, multi-parameter telemetry (V, I, P), or calibration flexibility outweigh analog simplicity |
Compared with ZXCT1110W5-7, MAX4080TASA+ trades 25× higher IQ and larger footprint for fixed-gain voltage output, while INA219AIDR replaces analog simplicity with digital configurability and higher power - making ZXCT1110W5-7 optimal for cost-sensitive, low-power, analog-integrated high-side sensing where GND-referenced linearity is critical.
Availability
ZXCT1110W5-7 is available at Aetrix Electronics and suitable for automotive battery management, industrial 24V power rail protection, and USB-C PD power delivery monitoring requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for ZXCT1110W5-7 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 and industrial markets.
The ZXCT series targets high-side current sensing in resource-constrained systems, emphasizing ultra-low IQ, wide common-mode operation, and minimal external component count - designed specifically for battery-powered and harsh-environment applications.
FAQ
What is the maximum allowable differential sense voltage (VSENSE) for continuous operation?
The ZXCT1110W5-7 supports continuous operation up to 500 mV VSENSE, with guaranteed linearity and monotonic output current. Absolute maximum rating is 800 mV, but operation beyond 500 mV risks increased transconductance error and nonlinearity per datasheet Table 2. For reliable design, limit VSENSE to ≤500 mV.
Can ZXCT1110W5-7 be used in bidirectional current sensing applications?
No - the ZXCT1110W5-7 is a unidirectional high-side current monitor optimized for positive VSENSE (VS+ > VS−). It does not support reverse current detection or negative VSENSE. For bidirectional sensing, a dual-supply or dedicated bidirectional IC like INA226 is required.
How does the NC pin (Pin 1) affect PCB layout and thermal performance?
Pin 1 is internally unconnected and must remain floating or be tied to GND for ESD robustness; it provides no thermal relief. Thermal dissipation relies solely on pins 2 (GND) and 4 (S+), so copper pour under the package should connect to GND and S+ pads per Diodes' layout guidelines to maintain θJA ≤ 200°C/W.
Is an external gain-setting resistor (RGAIN) mandatory for functional operation?
No - RGAIN is optional and only required if a voltage output is needed. The ZXCT1110W5-7 outputs a current (IOUT) inherently; this can be fed directly into a transimpedance amplifier, comparator, or current-input ADC. RGAIN converts IOUT to VOUT = IOUT × RGAIN, enabling compatibility with standard voltage-input interfaces.
ZXCT1110W5-7 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-Side
- Accuracy:
- -
- Voltage - Input:
- 2.5V ~ 36V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
ZXCT1110W5-7 FAQ
1.How can I place an order for ZXCT1110W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT1110W5-7 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 ZXCT1110W5-7 reliable?
The price and inventory of ZXCT1110W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT1110W5-7 is usually 5 days.
3.What payment methods are accepted for ZXCT1110W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT1110W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT1110W5-7?
ZXCT1110W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT1110W5-7 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 ZXCT1110W5-7?
For technical support, including ZXCT1110W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT1110W5-7 requirements.
6.How does Aetrix verify that ZXCT1110W5-7 is sourced from the original manufacturer or authorized distributors?
All ZXCT1110W5-7 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 ZXCT1110W5-7 meets industry standards.
7.What is the process for return or replacement of ZXCT1110W5-7?
All ZXCT1110W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT1110W5-7, 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 ZXCT1110W5-7 part is unused and in its original packaging.
Return procedure for ZXCT1110W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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