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Diodes Incorporated ZXCT1107QSA-7
- Part No.:
- ZXCT1107QSA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXCT1107QSA-7.pdf
- Description:
- IC CURRENT MONITOR SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:14,027
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Product details
Overview
ZXCT1107QSA-7 from Diodes Incorporated is an automotive-grade, high-side unipolar current sense monitor in SOT23-3 package. It operates from 2.5V to 36V common-mode input range, draws only 3µA quiescent current, delivers 4mA/V transconductance, and supports linear sensing from 10mV to 500mV differential input - enabling precise load current monitoring in battery management and overcurrent protection circuits without ground-plane disruption.
For engineers reviewing the ZXCT1107QSA-7 datasheet, ZXCT1107QSA-7 pinout, ZXCT1107QSA-7 application, or ZXCT1107QSA-7 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, SOT23-3 footprint compatibility, 3µA supply current impact on measurement accuracy, and single external gain resistor (RGAIN) configuration for scalable voltage output conversion.
Technical Context
The ZXCT1107QSA-7 uses a line-powered architecture with S+ serving as both high-side sense input and internal analog supply rail - eliminating need for separate VCC. Its transconductance stage delivers 4mA/V output current proportional to VSENSE, with guaranteed linearity between 10mV and 500mV and ±1.8% transconductance error over temperature.
Common-mode rejection is maintained at ≤0.4µA/V across 2.5V–36V input range, and output current temperature coefficient is 370ppm/°C. The device's substrate-connected OUT pin (Pin 1) imposes a minimum VS+ of (2.5V + VOUT), constraining low-voltage operation when driving high-impedance loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.5V to 36V common-mode input - enables direct connection to 12V/24V automotive rails without level-shifting. |
| Quiescent Current | 3µA - minimizes parasitic loading on S+ rail and preserves system efficiency in always-on monitoring. |
| Transconductance | 4mA/V ±1.8% - defines precise IOUT = 4 × VSENSE scaling for predictable analog-to-digital conversion. |
| Sense Range | 10mV to 500mV linear VSENSE - sets usable RSENSE window (e.g., 50mΩ @ 2A yields 100mV, meeting 3.4% error spec). |
| Temp Range | −40°C to +125°C - supports under-hood deployment in engine control, body electronics, and ADAS modules. |
| AEC-Q100 Grade | Grade 1 qualified - certified for automotive production with PPAP documentation support. |
| Package | SOT23-3 - surface-mount footprint compatible with high-density PCB layouts and automated assembly. |
Pinout & Package
SOT23-3 package with exposed pad (no thermal pad designation in datasheet); compact 2.9mm × 1.6mm footprint; rated for 300mW power dissipation at TA = +25°C, derating linearly to zero at +150°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Current output / substrate connection | Delivers 4×VSENSE (µA) output current; also serves as internal substrate reference - requires VS+ ≥ (2.5V + VOUT) for proper biasing. |
| 2 - S− | Negative sense input | High-impedance node referenced to load return path; accepts up to ±8.5mA input current under fault conditions. |
| 3 - S+ | Positive sense input / analog supply | Connects to high-side power rail; powers internal circuitry and defines common-mode range; current varies with VSENSE. |
Key Features
| Feature | Design Value |
|---|---|
| Line-powered operation | No external VCC required - S+ supplies internal circuitry, reducing BOM count and layout complexity. |
| Ultra-low quiescent current | 3µA max - avoids measurable voltage drop across RSENSE during standby, critical for battery leakage monitoring. |
| Wide common-mode range | 2.5V to 36V - supports direct integration into 12V/24V/48V automotive subsystems without attenuation networks. |
| Single-resistor gain scaling | RGAIN converts IOUT to VOUT - enables flexible interface with ADCs, comparators, or op-amps using standard resistor values. |
| AEC-Q100 Grade 1 compliance | Qualified per stress test schedule including HTOL, TC, ESD (HBM 1.5kV), and PPAP-ready documentation - meets OEM Tier-1 requirements. |
Applications
| Automotive Battery Monitoring | Engine Control Unit (ECU) Load Sensing |
|---|---|
|
Use Scenario: Real-time monitoring of 12V lead-acid or Li-ion starter battery discharge/charge current in start-stop systems. IC Role / Device Role / Timing Role: High-side current mirror delivering proportional output current to microcontroller ADC via RGAIN resistor. Use Value: Enables accurate state-of-charge estimation with <3.4% total error at 100mV VSENSE, while consuming only 3µA - extending battery standby life. |
Use Scenario: Detecting abnormal solenoid, injector, or fan motor current draw during engine runtime. IC Role / Device Role / Timing Role: Fault-triggered current sensor feeding comparator threshold circuit for immediate load disconnect. Use Value: 10mV–500mV linear range captures both nominal (e.g., 500mA idle) and fault-level (e.g., 15A short) currents with single device. |
| Electric Power Steering (EPS) Overcurrent Protection | ADAS Camera Module Current Supervision |
|
Use Scenario: Monitoring H-bridge motor driver current in EPS systems to prevent MOSFET thermal runaway. IC Role / Device Role / Timing Role: High-speed current feedback element interfaced with fast-response comparator for <10µs fault detection. Use Value: 0.65MHz bandwidth ensures timely response to transient overloads; AEC-Q100 qualification guarantees reliability in safety-critical steering systems. |
Use Scenario: Verifying stable current draw of 5V/3.3V camera imaging sensors and ISP processors during boot and operation. IC Role / Device Role / Timing Role: Low-power supervision node reporting current anomalies to vehicle domain controller via CAN or LIN. Use Value: 3µA quiescent current avoids false wake-up in sleep mode; −40°C to +125°C rating supports hood-mounted camera placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4080TASA+ | Higher quiescent current (75µA), wider VCM (−0.1V to 76V), fixed 20V/V gain - no RGAIN flexibility. | Requires external supply; better suited for industrial 48V systems than automotive 12V/24V due to higher IQ. | Select when extended common-mode range beyond 36V is needed and fixed-gain simplifies design. |
| INA240A1QDRQ1 | Bi-directional sensing, 80V VCM, 20ppm/°C offset drift, 4V/V fixed gain - higher precision but larger SOIC-8 package. | Supports regenerative braking current measurement; not optimized for ultra-low IQ battery monitoring. | Select when bidirectional capability or lower offset drift is mandatory, and board space permits SOIC-8. |
Compared with MAX4080TASA+ and INA240A1QDRQ1, the ZXCT1107QSA-7 uniquely balances AEC-Q100 Grade 1 compliance, 3µA IQ, SOT23-3 size, and user-configurable gain - making it optimal for cost-sensitive, space-constrained automotive current monitoring where unidirectional sensing suffices.
Availability
ZXCT1107QSA-7 is available at Aetrix Electronics and suitable for automotive battery management, ECU load diagnostics, and electric power steering systems requiring stable component supply across extended temperature and lifecycle demands.
Supply support for ZXCT1107QSA-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 ZXCT1107QSA-7 belongs to Diodes' automotive-qualified current sense monitor product line, designed specifically for high-reliability, low-power, high-side current measurement in harsh-temperature vehicle subsystems.
FAQ
What is the minimum supply voltage required for ZXCT1107QSA-7 operation?
The minimum S+ voltage is (2.5V + VOUT), where VOUT = IOUT × RGAIN. For example, with RGAIN = 5.1kΩ and VSENSE = 100mV, IOUT ≈ 408µA → VOUT ≈ 2.08V → minimum VS+ = 4.58V. This constraint arises because Pin 1 (OUT) serves as both output and substrate connection.
Can ZXCT1107QSA-7 measure bidirectional current?
No. The ZXCT1107QSA-7 is a unidirectional high-side current monitor. It outputs current only when VSENSE = VS+ − VS− is positive (i.e., current flows from S+ to S−). Reverse current produces no valid output and may violate absolute maximum ratings if VSENSE < −0.3V.
How does the 3µA quiescent current affect measurement accuracy?
The 3µA IQ flows through the S+ pin and introduces negligible error in typical applications: for a 50mΩ RSENSE at 2A load, the 3µA adds only 0.15nV drop - far below the 10mV minimum linear VSENSE threshold. Accuracy impact is dominated by transconductance error and resistor tolerances, not IQ.
Is an external bypass capacitor required on the S+ pin?
No dedicated bypass capacitor is specified in the datasheet. However, local 100nF ceramic capacitance between S+ and GND (for ZXCT1110Q) or S+ and OUT (for ZXCT1107Q/09Q) is recommended in noisy automotive environments to suppress high-frequency common-mode transients and maintain CMRR performance.
ZXCT1107QSA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXCT1107QSA-7 FAQ
1.How can I place an order for ZXCT1107QSA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT1107QSA-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 ZXCT1107QSA-7 reliable?
The price and inventory of ZXCT1107QSA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT1107QSA-7 is usually 5 days.
3.What payment methods are accepted for ZXCT1107QSA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT1107QSA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT1107QSA-7?
ZXCT1107QSA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT1107QSA-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 ZXCT1107QSA-7?
For technical support, including ZXCT1107QSA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT1107QSA-7 requirements.
6.How does Aetrix verify that ZXCT1107QSA-7 is sourced from the original manufacturer or authorized distributors?
All ZXCT1107QSA-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 ZXCT1107QSA-7 meets industry standards.
7.What is the process for return or replacement of ZXCT1107QSA-7?
All ZXCT1107QSA-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT1107QSA-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 ZXCT1107QSA-7 part is unused and in its original packaging.
Return procedure for ZXCT1107QSA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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