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Diodes Incorporated ZXCT212QBDW-7
- Part No.:
- ZXCT212QBDW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
ZXCT212QBDW-7.pdf
- Description:
- CM VOLTAGE OUTPUT SOT363 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
ZXCT212QBDW-7 from Diodes Incorporated is an automotive-grade, zero-drift, high-precision current-shunt monitor with 1000 V/V fixed gain, ±30 µV max offset voltage, and -0.3 V to 26 V common-mode input range. It measures low-side or high-side shunt voltages as small as 10 mV full-scale for accurate large-current sensing in battery management, motor control, and ADAS systems.
For engineers reviewing the ZXCT212QBDW-7 datasheet, ZXCT212QBDW-7 pinout, ZXCT212QBDW-7 application, or ZXCT212QBDW-7 equivalent, this device supports AEC-Q100 Grade 1 qualification, rail-to-rail output swing, 100 µA max quiescent current, and operation from -40°C to +125°C - critical for EV powertrain and safety-critical current monitoring.
Technical Context
The ZXCT212QBDW-7 uses a zero-drift chopper-stabilized architecture with post-trim calibration to achieve ±30 µV max input offset and 10 ppm/°C max gain drift over temperature. Its differential input stage rejects common-mode voltages up to 26 V while operating from a 2.7 V supply - enabling direct sensing on high-voltage rails without level shifting.
It delivers rail-to-rail output swing (within 50 mV of V+ and 5 mV of GND) into 10 kΩ loads across temperature, with 4 kHz bandwidth and 25 nV/√Hz input voltage noise. The REF pin allows configurable unidirectional or bidirectional current measurement by setting output bias point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 1000 V/V - scales 10 mV shunt drop to 10 V output, enabling full-scale ADC utilization with minimal power loss. |
| Offset Voltage (max) | ±30 µV - ensures ≤30 nA error contribution at 10 mV sense voltage, critical for sub-1% current accuracy. |
| Common-Mode Range | -0.3 V to 26 V - supports direct high-side sensing on 12 V/24 V/48 V automotive rails without external level shifters. |
| Supply Voltage | 2.7 V to 26 V - powers from low-voltage microcontrollers while interfacing with high-voltage battery stacks. |
| Quiescent Current | 100 µA max - enables always-on current monitoring in battery-backed systems with negligible standby drain. |
| CMRR | 95 dB min - suppresses 26 V common-mode interference to <1.8 mV error at output, essential for noisy motor drive environments. |
| Operating Temp | -40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and traction inverter applications. |
Pinout & Package
Package: 6-pin SOT363 (2.2 mm × 2.1 mm × 1.0 mm), RoHS-compliant, halogen-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Analog reference input | Sets output DC bias; 0 V to V+ range enables unidirectional (GND-biased) or bidirectional (V+/2-biased) current sensing. |
| 2 (GND) | Ground reference | Return path for supply and signal; must be low-impedance to minimize ground bounce in high-dI/dt systems. |
| 3 (V+) | Power supply input | Accepts 2.7–26 V; bypass capacitor required between V+ and GND for stability and noise rejection. |
| 4 (IN+) | Differential input (+) | Connects to supply side of shunt resistor; high-impedance input minimizes loading error on precision sense networks. |
| 5 (IN−) | Differential input (−) | Connects to load side of shunt resistor; matched input bias currents reduce gain error from series resistance. |
| 6 (OUT) | Analog output | Voltage proportional to load current (VOUT = ILOAD × RSENSE × 1000 + VREF); rail-to-rail swing interfaces directly with 3.3 V/5 V ADCs. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from -40°C to +125°C ambient, PPAP-capable, manufactured in IATF 16949 facilities. |
| Zero-drift architecture | 0.1–0.5 µV/°C offset drift ensures stable baseline over temperature - eliminates recalibration in thermal cycling environments. |
| Rail-to-rail output | Swings within 50 mV of V+ and 5 mV of GND, maximizing dynamic range for 12-bit+ ADCs without external amplification. |
| 10 mV full-scale shunt support | Enables use of low-value shunts (e.g., 1 mΩ @ 10 A) to reduce power loss (<100 mW) and thermal drift in high-current paths. |
| Low gain error drift | 10 ppm/°C max - contributes ≤0.12% gain error over -40°C to +125°C, supporting <0.5% total current measurement accuracy. |
Applications
| EV Battery Management System (BMS) | Automotive High-Voltage DC/DC Converter |
|---|---|
|
Use Scenario: Real-time bidirectional current monitoring during battery charge/discharge cycles in 400 V/800 V traction packs. IC Role / Device Role / Timing Role: High-side current sensor with REF-biased output, converting ±50 A shunt voltage to ±5 V analog signal for MCU ADC sampling. Use Value: ±30 µV offset enables ≤0.1% full-scale error at 10 mV sense voltage, ensuring SOC estimation accuracy within ±1.5% over lifetime. |
Use Scenario: Input/output current sensing in isolated 48 V–12 V DC/DC converters for ADAS domain controllers. IC Role / Device Role / Timing Role: Low-side current monitor on primary-side MOSFET source, providing fast overcurrent feedback to PWM controller. Use Value: 4 kHz bandwidth supports cycle-by-cycle current limiting at 500 kHz switching frequency; 100 µA IQ avoids efficiency penalty in light-load conditions. |
| Electric Power Steering (EPS) Motor Control | Vehicle Body Control Module (BCM) Valve Driver |
|
Use Scenario: Phase current sensing in three-phase inverter driving 12 V EPS motors with peak currents >200 A. IC Role / Device Role / Timing Role: High-side shunt monitor per phase, delivering isolated analog signals to motor control MCU for FOC algorithm execution. Use Value: -0.3 V to 26 V common-mode range accommodates negative transients during regenerative braking; 95 dB CMRR rejects gate-drive noise coupling. |
Use Scenario: Solenoid valve current monitoring in HVAC and chassis modules for open/short circuit detection and duty-cycle verification. IC Role / Device Role / Timing Role: Low-side current sensor in 12 V valve driver circuits, interfacing with 3.3 V microcontroller ADC via rail-to-rail output. Use Value: 2.7 V minimum supply allows operation during cold-crank (6.5 V battery sag); 1000 V/V gain resolves 1 mA changes at 10 mΩ shunt. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | 500 V/V gain, ±20 µV offset, 120 dB CMRR, 4 V/V to 500 V/V programmable gain variants available | Higher CMRR suits ultra-noisy inverter applications; lower gain requires larger shunt voltage for same output span | Select when >100 dB CMRR is mandatory and 500 V/V gain aligns with system shunt sizing. |
| MAX40056ATA+T | 1000 V/V gain, ±50 µV offset, 105 dB CMRR, operates up to 65 V common-mode, 1.5 mA IQ | Supports higher voltage rails (e.g., 48 V mild-hybrid systems); higher quiescent current limits always-on use cases | Select when common-mode exceeds 26 V or extended voltage margin is required despite higher power consumption. |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the ZXCT212QBDW-7 offers optimal balance of ultra-low offset (±30 µV), automotive qualification, and 100 µA IQ - making it preferred for cost-sensitive, thermally constrained BMS and EPS designs where 26 V common-mode suffices.
Availability
ZXCT212QBDW-7 is available at Aetrix Electronics and suitable for EV battery management, automotive motor control, and ADAS subsystems requiring stable component supply across long production lifecycles.
Supply support for ZXCT212QBDW-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 ZXCT21xQ series targets automotive current sensing with AEC-Q100 qualification, zero-drift precision, and wide common-mode operation - designed specifically for high-reliability EV powertrain and body electronics.
FAQ
What is the maximum common-mode voltage the ZXCT212QBDW-7 can measure?
The ZXCT212QBDW-7 supports a common-mode input range of -0.3 V to 26 V. This allows direct high-side current sensing on 12 V and 24 V automotive rails without external level-shifting circuitry. Operation beyond 26 V violates absolute maximum ratings and may cause permanent damage.
Can the ZXCT212QBDW-7 be used for bidirectional current sensing?
Yes - by applying a bias voltage (e.g., V+/2) to the REF pin, the output swings symmetrically around that reference, enabling measurement of both charging and discharging currents. The device's rail-to-rail output and low offset ensure accurate zero-crossing detection in battery management applications.
What shunt resistor value is recommended for 100 A full-scale measurement?
For 100 A full-scale with 10 mV sense voltage, use a 100 µΩ shunt resistor (R = V/I = 0.01 V / 100 A). At 1000 V/V gain, this yields 10 V output. Ensure the shunt's power rating exceeds I²R = 1 W, and verify layout minimizes parasitic inductance to avoid transient errors.
Does the ZXCT212QBDW-7 require external compensation components?
No external compensation is needed for stability under standard conditions. However, if input filtering is added for EMI suppression, series resistors must be ≤10 Ω to avoid gain error and CMRR degradation. A 0.01 µF–0.1 µF capacitor may be placed across the shunt for inductance compensation in high-dI/dt applications.
ZXCT212QBDW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- ZXCT21xQ
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High/Low-Side
- Accuracy:
- ±0.8%
- Voltage - Input:
- 2.7V ~ 26V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
ZXCT212QBDW-7 FAQ
1.How can I place an order for ZXCT212QBDW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT212QBDW-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 ZXCT212QBDW-7 reliable?
The price and inventory of ZXCT212QBDW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT212QBDW-7 is usually 5 days.
3.What payment methods are accepted for ZXCT212QBDW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT212QBDW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT212QBDW-7?
ZXCT212QBDW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT212QBDW-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 ZXCT212QBDW-7?
For technical support, including ZXCT212QBDW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT212QBDW-7 requirements.
6.How does Aetrix verify that ZXCT212QBDW-7 is sourced from the original manufacturer or authorized distributors?
All ZXCT212QBDW-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 ZXCT212QBDW-7 meets industry standards.
7.What is the process for return or replacement of ZXCT212QBDW-7?
All ZXCT212QBDW-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT212QBDW-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 ZXCT212QBDW-7 part is unused and in its original packaging.
Return procedure for ZXCT212QBDW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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